Flash is designed to withstand temperatures far beyond what we would consider optimal biking weather! However, once the temperature drops below freezing (or gets too hot), battery and touchscreen performance may decrease.
Here are specific recommended temperatures for riding and storing your Flash:
Operating temperature: 32°F - 105°F
Storage temperature: -4°F - 113°F
It's also best to avoid charging Flash while in direct sunlight, so you don't overheat the battery. And whenever possible, keep your Flash stored out of direct sunlight just to be safe.
In the winter, we recommend storing your Flash in a low-humidity environment.