In January, El Cajon typically sees daytime highs of 18.2°C and overnight lows around 3.8°C. Compared to the annual average high of 23.9°C, January runs -5.6°C.
January in El Cajon averages a daytime high of 18.2°C and an overnight low of 3.8°C.
January runs -5.6°C compared to El Cajon's annual average high of 23.9°C, ranking #12 of 12 months by warmth.
Plan for daytime highs near 18.2°C and cooler evenings around 3.8°C.