Never use a fire pit when there’s precipitation. That includes snow and sleet, but also rain. Another rule of thumb is to avoid using a fire pit when temperatures dip below 40 degrees Fahrenheit. At that temperature, it’s wise to cover your fire pit securely and forgo using it until the temperature rises by at least 5 degrees. Technically, you can use a fire pit during winter-- but it’s challenging and takes creative workarounds. If you are using it below recommended temperatures, be careful and wary of any snow on the ground.