R1 has been tested in a wide range of temperatures and has a recommended operating temperature range of 0°C - 35°C (32°F - 95°F). Because R1 uses visual navigation to see the world around it and avoid obstacles, it shouldn't be flown in falling snow, rain or fog.
While R1 works well for winter activities like skiing and snowboarding, etc., we recommend using caution when flying in temperatures approaching 0°C. The battery in R1 may not perform at peak efficiency when flying R1 in cold environments, especially as temps begin to drop closer to 0°C. This limitation is common with lithium polymer (LiPo) batteries.
To help offset this, try to keep your batteries at room temperature, or as close to it as you can before you fly. If you’re out adventuring in the cold, keep your R1 batteries insulated as best as possible (bundled up inside a coat or backpack, etc.).
Never use your R1 batteries at temperatures below 0°C, as they will not function properly below that temperature. If your batteries do get cold, warm them up in a room temperature environment - DO NOT use higher heat (hair dryer, etc.) to accelerate heating.
Check out this article for more battery tips and best practices: R1 battery guidelines, troubleshooting, and safety. Also be sure to check out Where can I fly my R1? for general guidance on choosing the best place to fly.