At night, yellow jackets are typically inactive and stop flying out if the temperature drops below 50° F. If it gets colder than that, they look for places to stay warm, which means they're not out flying around foraging for food.

Will yellow jacket attack at night?

Act at night: If you absolutely must approach a yellow jacket nest, do so at night. They are most active during the day and return to their nest at night, which means the chances of being stung are reduced when it's dark.

At what temperature do yellow jackets stop flying?

Yellow jackets are far more reluctant to fly when temperatures drop below 50 °F (10 °C). As a result, they are inactive during winter, gain strength in late spring and summer in order to feed their young, and become more active and aggressive around people during fall when food supplies run out.