Fillmore City Climate & Weather
The climate of Fillmore is continental. It is generally temperate and arid to semiarid, and is predominantly sunny. Average temperatures in summer range from mid to upper 90s and in winter range from mid 20s to 30s. Temperature extremes can range from a high of approximately 107 degrees in the summer months to a low of approximately -23 degrees F. in the winter months. The average annual temperature is approximately 52 degrees F.