In April, Koshigaya typically sees daytime highs of 18.3°C and overnight lows around 9.2°C. Compared to the annual average high of 19.6°C, April runs -1.3°C.
April in Koshigaya averages a daytime high of 18.3°C and an overnight low of 9.2°C.
April runs -1.3°C compared to Koshigaya's annual average high of 19.6°C, ranking #7 of 12 months by warmth.
Plan for daytime highs near 18.3°C and cooler evenings around 9.2°C.