We still have very small insects flying around and slightly larger ones to eat them, including bug-hunting Cherry-Faced Meadowhawk Dragonflies such as this one. The various and tough Meadowhawk species often survive through the first few sustained frosts, which we’ve not had, and probably won’t have.
The historic average low and high for October here on the coast are 39 and 57 degrees Fahrenheit. Freezing weather occasionally occurs here in October: the record low for us was 18 degrees in October of 1972. It can get warm: our record high for the month here was 82 degrees in 1968. (Brooklin, Maine)