Climate in Basel

Basel, Switzerland has a humid continental climate. The annual average temperature is about 9.8°C and the city receives roughly 1050 mm of precipitation across 119 rainy days a year, with around 1434 hours of sunshine. The warmest month is Jul (highs near 25.2°C) and the coldest is Jan (lows near -5.5°C). These are deterministic, latitude- and region-based planning estimates — not a forecast or measured station data; check current conditions with an official meteorological service before travel.

Data year 2025; last updated 2026-05-16.

Basel is classified as Humid Continental. This reflects its annual temperature range and the seasonal pattern of its rainfall.

Basel receives about 1050 mm of precipitation a year over roughly 119 rainy days. The wettest month is Jun and the driest is Jan.

Basel sees an estimated 1434 hours of sunshine a year, concentrated in the warmer months around Jul.

By temperature and rainfall, the most comfortable months in Basel are Sep, Aug, May. Conditions vary year to year — verify with a current forecast before booking.

Basel has a climate comfort score of 62/100, a comfortable year-round climate by this measure. The score weights mild temperatures most, then rainfall balance, sunshine, low seasonality, and the absence of extreme winter cold or summer heat.

• Climate in Zurich — Humid Continental, comfort 62/100
• Climate in Geneva — Humid Continental, comfort 68/100
• Climate in Vienna — Humid Continental, comfort 65/100