Does bear spray work when it’s cold or windy?

Yes, bear spray is effective even when it’s cold and windy. Temperatures above freezing (32F) have no effect on how well bear spray performs, and in tests, bear spray proved to still be effective at temperatures as low as -14 (F). Wind at your back can extend the reach and width of the spray, while wind in your face can diminish the distance the spray travels or blow it back towards you.

Source: “Bear Spray Performance” by Smith, et al., The Journal of Wildlife Management

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