2H4
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Temperature Inside A Car On A Hot Day

Thu May 04, 2006 11:40 pm



Does anyone know what temperatures can be reached inside of a parked car on a very hot day? I'm sure there are several variables, but I'd like to see some actual numbers.

I tried searching for this information, but there doesn't seem to be much out there.

Thanks in advance!




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oly720man
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RE: Temperature Inside A Car On A Hot Day

Thu May 04, 2006 11:48 pm

Remember, according to the National Highway Traffic Safety Administration, 'a locked car sitting in the summer sun quickly turns into an oven,' and 'temperatures can climb from 78 degrees to 100 degrees in just three minutes, to 125 degrees in 6-8 minutes.'

http://pediatrics.about.com/od/safety/a/05_hot_cars.htm

(not sure I believe the 22 deg rise in 3 minutes because other sources have a longer time)


More info here.

http://www.dfps.state.tx.us/lookbefo...eyouleave/HotCarsTalkingPoints.asp
wheat and dairy can screw up your brain
 
deltagator
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RE: Temperature Inside A Car On A Hot Day

Thu May 04, 2006 11:53 pm

Quite warm but of course depends on the air temperature outside. This blurb is from a company that sells heat shades and such for cars so take it with a grain of salt.

"Results showed that a parked car without the use of a sunshade experienced extreme heat with the dashboard heating up to 192°F, high enough to cook a chicken and the steering wheel topping out at 191°F, high enough to grill a hamburger. In fact, a car parked in direct sunlight with closed windows can heat up to alarming temperatures in just minutes. The average temperature on the dashboard in a car without a sunshade, after fifteen minutes, reached 149°F. The testing further revealed that, in the same extreme conditions, a car using an accordion style sunshade in the windshield was able to keep the dashboard surfaces an average of 43° F cooler.

Source: http://www.auto-expressions.net/pr_sun_protect.htm
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raffik
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RE: Temperature Inside A Car On A Hot Day

Fri May 05, 2006 12:10 am

I popped out to the bank earlier and when I got back, the digital temperature showed 28c. I had only been about 10 minutes. Mind, it is a lovely day today (in the UK anyway). It soon went down once I was on the move and switched the aircon on
- Alec
 
MYT332
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RE: Temperature Inside A Car On A Hot Day

Fri May 05, 2006 12:20 am

Temperature in a parked car on a hot day? Well, 18c in ours usually.


You didn't say with the engine off.
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ArmitageShanks
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RE: Temperature Inside A Car On A Hot Day

Fri May 05, 2006 2:17 am

I've had VHS tapes melt and coke cans explode in my car due to the heat.
 
YYZflyer
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RE: Temperature Inside A Car On A Hot Day

Fri May 05, 2006 6:07 am

I've burned my hand on the metal part of the seatbelt. When I was in Florida I think the temp rose to around 120F.

 airplane 
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BCNGRO
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RE: Temperature Inside A Car On A Hot Day

Fri May 05, 2006 8:22 am

It can get pretty hot, at least here. I guess the air inside a car parked in direct sunlight in a very hot summer day (35C/95F) can heat up to a temperature similar to that you would experience in a sauna (70C/160F - 80C/180F). I guess metal surfaces can get much hotter, though. You can actually get burned with them --and you would get burned in a sauna-- so I guess they might even get close to 100C/210F...

[Edited 2006-05-05 01:24:28]
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redngold
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RE: Temperature Inside A Car On A Hot Day

Fri May 05, 2006 8:26 am

It does not even have to be a hot day outside - it can get very hot inside a car on a 55-65F day if you have no windows/sunroof open. Also if your car is darker in color it will not reflect as much sunlight... but that's moot after a few minutes.
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2H4
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RE: Temperature Inside A Car On A Hot Day

Fri May 05, 2006 9:50 am



Thanks for the input, everyone. I'm looking into the hazards (if any) of keeping a carbon-fiber bicycle in a car during a hot, sunny day. Certain carbon-fiber composites and their bonding materials could become damaged in higher temperatures...




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AirCop
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RE: Temperature Inside A Car On A Hot Day

Fri May 05, 2006 9:59 am

Every summer the local news does a demonstration on how fast the temps in a vehicle goes up. It also interesting to see the effect on the reporter. By the way it gets hot here in Phoenix. Perhaps thats the reason why white is the #1 color for autos here.
 
An-225
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RE: Temperature Inside A Car On A Hot Day

Fri May 05, 2006 10:00 am

Enough to cook a baby  Smile.

Alex
Money does not bring you happiness. But it's better to cry in your own private limo than on a cold bus stop.
 
cptkrell
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RE: Temperature Inside A Car On A Hot Day

Fri May 05, 2006 10:08 am

Which is testimony to how far automotive technology has come when (generally) most cars can withstand incredible temperature extremes from high to low in short periods of time and systems functions usually still perform as per intent. Regards...jack
all best; jack
 
Bobster2
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RE: Temperature Inside A Car On A Hot Day

Fri May 05, 2006 10:12 am

Quoting 2H4 (Thread starter):
I'd like to see some actual numbers.

Buy, and learn how to use, an actual thermometer.  Smile

This is supposed to be a forum for technical geeks, isn't it?

You're willing to trust complete strangers to tell you the temperature in your car and we don't even know what kind of car it is. Why can't you measure it?
"I tell you this, no eternal reward will forgive us now for wasting the dawn." Jim Morrison
 
bill142
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RE: Temperature Inside A Car On A Hot Day

Fri May 05, 2006 10:15 am

Leather tends to be hot on the bum. I have one of those shade things but it only covers the front window. so it all depends on what angle you park your car on. If the rear and side windows are going to get more sun then the front, covering the front window is kind of useless.
 
2H4
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RE: Temperature Inside A Car On A Hot Day

Fri May 05, 2006 10:55 am




Quoting Bobster2 (Reply 13):
Why can't you measure it?

Well, Bobster, I'm having trouble altering my local climate. Try as I might, I just can't seem to increase the local high temperatures past the 70-degree range.

A keen reader will notice the original question referred to a very hot day, and allowed for variables.


 Wink




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ltbewr
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RE: Temperature Inside A Car On A Hot Day

Fri May 05, 2006 11:13 am

In a warm spring/fall and of course a typical Summer day in most the world, the tempatures can rise quickly to levels that can cause heat stroke and even death to humans and animals. All states have laws not allowing closed up cars with children or animals in them if the weather is hot. Some people have returned to their cars to find out the police have been called or a good samaritan has broken the windows to let air in or to save the life of a child or animal.
 
bristolflyer
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RE: Temperature Inside A Car On A Hot Day

Fri May 05, 2006 11:14 am

I saw an article on the news recently in Phoenix that a car left unattended in 110 can rise to 140 in as little as 10 mins. Then I would guess it would keep rising 'til it gets to a max, I would guess at about 150-160 degs.

You may want to do a search of the Phx news companies as they regularly have features about leaving kids in cars (seems to be about 10 deaths a yr in Phx alone).

BF
Fortune favours the brave
 
MDorBust
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RE: Temperature Inside A Car On A Hot Day

Fri May 05, 2006 11:26 am

I've seen readings between 150 and 160 on my vehicles during Texas summers.

I would contact the manufacturer of the bike frame to see what temperature range is safe for it.... some carbon fiber assemblies can withstand a shocking amount of heat.
"I KICKED BURNING TERRORIST SO HARD IN BALLS THAT I TORE A TENDON" - Alex McIlveen
 
Bobster2
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RE: Temperature Inside A Car On A Hot Day

Fri May 05, 2006 11:55 am

Quoting MDorBust (Reply 18):
some carbon fiber assemblies can withstand a shocking amount of heat.

The Space Shuttle uses carbon fiber for the nose cone and leading edges to withstand temperatues up to 2300 deg F.

Does a car get that hot in the Sun?
"I tell you this, no eternal reward will forgive us now for wasting the dawn." Jim Morrison
 
2H4
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RE: Temperature Inside A Car On A Hot Day

Fri May 05, 2006 12:01 pm




Quoting Bobster2 (Reply 19):
Does a car get that hot in the Sun?

Of course not, but it doesn't matter, as the types of carbon fiber utilized in the bicycle industry vary wildly. Not all...or even most...of them use space-shuttle-grade carbon fiber. Temperatures approaching 200 degrees certainly have the potential to damage or degrade certain types of carbon.




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MDorBust
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RE: Temperature Inside A Car On A Hot Day

Fri May 05, 2006 12:07 pm

Quoting Bobster2 (Reply 19):
Does a car get that hot in the Sun?

Nope, which is why my carbon fiber rifle barrels are completely safe in my vehicle... but I doubt my rifle and his bike are made out of the same carbon fiber assemblies.
"I KICKED BURNING TERRORIST SO HARD IN BALLS THAT I TORE A TENDON" - Alex McIlveen
 
Bobster2
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RE: Temperature Inside A Car On A Hot Day

Fri May 05, 2006 12:54 pm

Quoting 2H4 (Reply 20):
Temperatures approaching 200 degrees certainly have the potential to damage or degrade certain types of carbon.

Park in the shade. Leave the windows open.

Why would you buy a fancy bike and leave it in the car?
"I tell you this, no eternal reward will forgive us now for wasting the dawn." Jim Morrison
 
2H4
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RE: Temperature Inside A Car On A Hot Day

Fri May 05, 2006 1:46 pm




Quoting Bobster2 (Reply 22):
Why would you buy a fancy bike and leave it in the car?

I personally wouldn't, but people do.




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DLKAPA
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RE: Temperature Inside A Car On A Hot Day

Fri May 05, 2006 2:18 pm

Quoting An-225 (Reply 11):
Enough to cook a baby

Knowing you, you're probably talking from experience...

Cars can heat up very, very quickly to very hot temperatures, the windows let light in (the light from the sun carries with it the sun's heat). The dark in your car absorbs the light and the heat, then when the stuff inside your car heats up, it heats up the air around it (which cant escape cause all the windows are closed). This explains why things such as a leather steering wheel and seat belts are hotter than the air itself inside your car. Long story short, if left long enough, you could probably cook things (like babies as our russian friend has pointed out) in your car.
And all at once the crowd begins to sing: Sometimes the hardest thing and the right thing are the same
 
bristolflyer
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RE: Temperature Inside A Car On A Hot Day

Fri May 05, 2006 3:05 pm

Quoting Bobster2 (Reply 22):
Why would you buy a fancy bike and leave it in the car?

I would hazard a guess at...people transporting their bike from one place to another. It's more secure to leave the bike in the car than to have it on a rack on the back/roof.

BF
Fortune favours the brave
 
KevinL1011
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RE: Temperature Inside A Car On A Hot Day

Fri May 05, 2006 3:16 pm

Quoting BristolFlyer (Reply 17):
saw an article on the news recently in Phoenix that a car left unattended in 110 can rise to 140 in as little as 10 mins. Then I would guess it would keep rising 'til it gets to a max, I would guess at about 150-160 degs.



Quoting MDorBust (Reply 18):
I've seen readings between 150 and 160 on my vehicles during Texas summers.

These are realistic figures in direct sun with ambient temp. 100-110.f.

While visiting Phoenix, Az. one 110f day, I left my wallet in a briefcase stored on the right front floorboard of a rented 1994 Ford Thunderbird. The subject vehicle was parked on the roof of Phoenix Motor Cars, Downtown on Indian School road from 10am to 3pm. Later, upon check-in at the Embassy Suites, Scottsdale, I was distressed to find my credit cards had melted and were deformed. The embossed numbers on the cards had also returned to their "pre-embossed" flatness. A bar of soap in my toiletry bag had liquefied as well.

The point here is if the bike frames are formed with heat, they have a good chance of returning to their original shape.....granted if the heat forming is done at 200 deg or less.

Another story, a client of mine had two cans of that yellow expanding foam used for sealing doors and windows on the front seat of his Seville one hot 110 deg Cucamonga day. They blew....totalled the car. It looked like the scene in "Demolition Man" when Stallone crashes the Police Car. The warning on the can is real.
474218, Carl, You will be missed.
 
2H4
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RE: Temperature Inside A Car On A Hot Day

Fri May 05, 2006 3:28 pm




Quoting BristolFlyer (Reply 25):
I would hazard a guess at...people transporting their bike from one place to another.



Quoting KevinL1011 (Reply 26):
The point here is if the bike frames are formed with heat, they have a good chance of returning to their original shape.....granted if the heat forming is done at 200 deg or less.

 checkmark   yes 


I'm not sure why our friend Bobster seems to have such a problem with all of this...it's a very real concern for anyone transporting modern bicycles in a car during the warm months.




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Bobster2
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RE: Temperature Inside A Car On A Hot Day

Sat May 06, 2006 2:16 am

Quoting 2H4 (Reply 27):
Bobster seems to have such a problem with all of this

Because you can make measurements with a thermometer. The important thing is the difference between inside and outside temperature. If it's only 70 degrees outside now, that's OK, go ahead and measure the inside temperature anyway, you can predict what will happen at when it's 100 degrees outside. The main issue is how bright is the sun? We are getting close to the summer solstice so the sun is approaching maximum intensity in the northern hemisphere. On a clear day the sun should be as bright as it will be in August.

Because you will have the air conditioner running while you drive and/or have the windows open. When you get to your destination, take the bike out of the car.

Because you never told us what kind of car. Is it an SUV with lots of windows to let in sunlight? Or will the bike be in a dark trunk where there is no sunlight at all?

Because you could use insulation to protect the bike. The insulation won't keep the temperature from going up, but it will delay the temperature rise for a long time.
"I tell you this, no eternal reward will forgive us now for wasting the dawn." Jim Morrison
 
CPDC10-30
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RE: Temperature Inside A Car On A Hot Day

Sat May 06, 2006 2:19 am

I used to have a black car with a dark grey interior - needless to say my current car is white. Even at about 15-20C outside, if it was sunny the temperature inside after deing parked could be uncomfortable to the point of having to open the windows and doors for a short time. At 30+ degrees the seatbelt buckles could cause burns.
 
sprout5199
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RE: Temperature Inside A Car On A Hot Day

Sat May 06, 2006 3:21 am

Quoting An-225 (Reply 11):
Enough to cook a baby

This happens alot here in Florida I'm sad to say.
http://www.palmbeachpost.com/pbccent...aper/2006/05/02/s1b_baby_0502.html

this just happened this week.  Sad

Dan in Jupiter

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