In January, West Allis typically sees daytime highs of -3.6°C and overnight lows around -12.1°C. Compared to the annual average high of 12.9°C, January runs -16.5°C.
January in West Allis averages a daytime high of -3.6°C and an overnight low of -12.1°C.
January runs -16.5°C compared to West Allis's annual average high of 12.9°C, ranking #12 of 12 months by warmth.
Plan for daytime highs near -3.6°C and cooler evenings around -12.1°C.