With summer officially here in North America and the mercury rising, many GPS users have been asking how hot weather might impact there GPS devices. Particularly, if they leave their car out in the hot Arizona sun with the GPS on the dash, will it survive their day at the beach and still be able to guide them home? It is difficult to predict exactly where the breaking point will be, but your owner’s manual will typically provide some insight. Here are some excerpts.

You will typically find different acceptable temperature ranges for different usage types. For example you might find an operating temperature range, a short term storage range, and a long term storage range. Here are some examples of different devices and their stated acceptable temperature ranges. These are just examples, you should consult the manual of your own GPS for its temperature ranges.
Garmin

Do not store your [GPS] where prolonged exposure to extreme temperatures can occur (such as in the trunk of a car), because it can cause permanent damage. …

* Short term storage: -4° – 140°F (-20°C – 60°C)
* Long Term Storage: 32° – 77°F (0°C – 25°C)
* Operating Temperature: -4°F – 131°F