In January, Green Bay typically sees daytime highs of -4.4°C and overnight lows around -14.0°C. Compared to the annual average high of 12.4°C, January runs -16.8°C.
January in Green Bay averages a daytime high of -4.4°C and an overnight low of -14.0°C.
January runs -16.8°C compared to Green Bay's annual average high of 12.4°C, ranking #12 of 12 months by warmth.
Plan for daytime highs near -4.4°C and cooler evenings around -14.0°C.