In January, Arlington Heights typically sees daytime highs of -1.7°C and overnight lows around -10.1°C. Compared to the annual average high of 14.3°C, January runs -16.0°C.
January in Arlington Heights averages a daytime high of -1.7°C and an overnight low of -10.1°C.
January runs -16.0°C compared to Arlington Heights's annual average high of 14.3°C, ranking #12 of 12 months by warmth.
Plan for daytime highs near -1.7°C and cooler evenings around -10.1°C.