Ulm has a temperate inland climate that is best classified as **Humid Continental** (Köppen Dfb), with warm summers, cold winters, and precipitation spread through the year. The current heavy rain and high humidity are consistent with a wetter continental setting, while long-term climate normals for southern Germany support moderate annual rainfall and seasonal temperature contrasts.
Spring
March - May6-16°C
Spring is cool to mild and often changeable, with frequent rain showers and increasing sunshine toward May. Frost can still occur in early March, especially at night.
Moderate rainfallSummer
June - August14-24°C
Summer is generally warm rather than hot, with periods of sunny weather interrupted by thunderstorms and rain. Daytime temperatures can occasionally rise above the average during warm spells.
Moderate rainfallAutumn
September - November5-15°C
Autumn is typically cool, damp, and increasingly cloudy as the season progresses. Rainfall remains fairly common, and the first frosts usually arrive later in the season.
Moderate rainfallWinter
December - February-2-4°C
Winter is cold with frequent cloudy periods, occasional snow, and short daylight hours. Temperatures often hover near freezing, though mild thaws also occur.
Moderate rainfall
