Can Insects Really Predict the Weather?

September 18, 2025 — From ants to spiders, certain creatures are believed to have an uncanny ability to predict weather changes. Folk traditions say that observing insect behavior may offer clues about upcoming weather conditions.

Many people might be familiar with the woolly bear caterpillar’s stripes. Folklore suggests that if it has more black than brown, winter will be severe. Conversely, more brown than black indicates a milder winter. This caterpillar serves as just one example of how nature may provide hints about the weather.

Other insects, like ants and crickets, also play a role in these weather predictions. For instance, if ants are seen carrying food to their nests, some believe that this signals an impending change in the weather, such as rain. Crickets are often studied as well; a popular saying states that the number of chirps in 15 seconds, when added to 40, gives an approximate temperature in Fahrenheit.

Spiders, although arachnids, are often included in the mix. Observers suggest that spiders spinning thicker webs may signal a colder winter ahead. Some weather-watchers even turn to onion skins, claiming they can provide hints about the weather as well.

Numerous cultural sayings also support these beliefs. One person noted, “When hornets build their nests low to the ground, expect a mild winter.” Many have their own tales, often passed down through generations, regarding how animal behavior hints at weather shifts.

As seasons shift, observing nature may not just be a pastime but could also inform people about the weather. While scientific backing for such folklore varies, many remain curious if these predictions hold any truth.