Will it harm the weapon if it is left in the vehicle, for example, while you are at work, at a school, federal building, etc.., for hours each day during the winter months?

Where are you located?

If the steel is colder than the surrounding air,it attracts condensation and if it's held there by the lining of a gun case,it will rust

No people spend all day out the in the cold hunting.If condescension appears after it warms up wipe it dry.

The question is will your lube freeze the gun up so it won't fire? I use the USGI LIGHT WEAPONS OIL.

I'm in Ohio

Not usually. I'm gonna refrain from just saying no cause I'm sure someone has a story of a frozen gun but generally your gun will not be harmed

Unless of course this is your car

Deleted, wrong place for the post.

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Oh well, what the hell.

Do not remove till spring.

Mother nature doesn't like you.

This happened while your away at spring break?

Ok one night you didn't come home the ice is the same temperature as your misses when she greets you.

This isn't the Sopranos, can't call Tony, Pauly or Chris for help. Too bad they could blast.

You are so screwed. Your late for work again. The boss won't believe this one.

There goes that rear suspension. Better call Midas.

Great picture!

As to the gun, leaving it in the car could lead to rust on inner parts.

In extreme cold weather, you might want to consider "aircraft grease" (e.g., Mobil 28 grease) because it works over an extreme temperature range, e.g., down to 40 below, as expected because it is used in airplanes. It works well at regular temps, too. I prefer Breakfree CLP, with Breakfree LP on high contact parts, but have used the Mobil 28 with good success.

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S&W Rover

Keep a film of oil all over it. WD 40 is a good water displacer but it has to be applied often because it runs off. I have a cloth that I keep damp I use to wipe stuff like that down. This insides of the gun might need a light coat of heavier grease.

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"He was kinda funny lookin'"

No, cold weather will not harm a gun in any way, and I speak from experience. I use Break Free for lube and never had a problem in severe cold weather. Condensation will not form if the gun is a case of some kind so the gun changes temperature slowly. The case must not be moisture proof, or you will get rust.

Korean War vets told their M1 Carbines would sometimes freeze up in extreme cold . The quick fix was to urinate on it.

Go for it.

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I like Ike.

I often carried a semi-auto rifle in the arctic winter, using a graphite-based synthetic lube.
The rifle took -40 better than I did.

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Science plus Art