With a population of around 3,100, Unterkulm sits in Aargau, Switzerland. The city operates in the Europe/Zurich time zone.
In 2025, Unterkulm recorded an average annual temperature of 50°F. The hottest temperatures reached 92°F in July; the coolest were 20°F in December. Total precipitation for the year was 49 inches, with the wettest month being September. Snowfall for the year totaled approximately 4 inches.
View current conditions and forecast for Unterkulm · More cities in Aargau