Climate averages 1991–2020
Ulm weather
in May.
A mild, wet month: the 5th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a mild month in Ulm: daytime highs average 17.6°C and nights cool to about 8.3°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 95 mm of rain on roughly 14 days, which makes May a wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 15 h 11 min on an average May day.
The nearest other city in this atlas is Reutlingen (59 km away). In May its highs average 18.0°C, about as warm as Ulm, with 95 mm of rain.
Among the 120 cities listed in Germany, Ulm ranks joint 84th of 120 for the warmest May highs and joint 113th of 120 for the driest May (rainfall, lowest first). The mean May high of those 120 cities is 17.9°C; Ulm is 0.3°C cooler than that mean.
From May to June, average highs rise by 3.3°C to 20.9°C, and monthly rainfall rises from 95 mm to 96 mm.
The annual picture
May in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Ulm climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 3.4°C-2.7°C | -2.7°C | 61 | 11.7 | 8.89 h |
| February | 4.9°C-2.8°C | -2.8°C | 51 | 10.4 | 10.210 h |
| March | 9.2°C0.4°C | 0.4°C | 66 | 12.4 | 11.912 h |
| April | 13.7°C3.9°C | 3.9°C | 62 | 11.3 | 13.614 h |
| May, selected | 17.6°C8.3°C | 8.3°C | 95 | 14.4 | 15.215 h |
| June | 20.9°C11.9°C | 11.9°C | 96 | 14.5 | 16.016 h |
| July | 22.9°C13.9°C | 13.9°C | 99 | 14.5 | 15.716 h |
| August | 22.9°C13.9°C | 13.9°C | 88 | 13.4 | 14.314 h |
| September | 18.4°C10.0°C | 10.0°C | 69 | 11.3 | 12.613 h |
| October | 13.6°C6.1°C | 6.1°C | 67 | 11.4 | 10.911 h |
| November | 7.6°C1.5°C | 1.5°C | 64 | 10.9 | 9.39 h |
| December | 3.9°C-1.5°C | -1.5°C | 68 | 13.0 | 8.48 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
May in nearby cities
- Reutlingen in MayGermany · 59 kmHigh 18.0°C · Low 8.5°C · 95 mm rain
- Esslingen in MayGermany · 63 kmHigh 18.8°C · Low 9.0°C · 84 mm rain
- Augsburg in MayGermany · 67 kmHigh 18.0°C · Low 8.4°C · 110 mm rain
- Tübingen in MayGermany · 71 kmHigh 18.1°C · Low 8.6°C · 93 mm rain
- Stuttgart in MayGermany · 74 kmHigh 18.7°C · Low 9.0°C · 84 mm rain
- Ludwigsburg in MayGermany · 81 kmHigh 18.4°C · Low 8.9°C · 81 mm rain
- Heilbronn in MayGermany · 100 kmHigh 19.2°C · Low 9.8°C · 79 mm rain
- Konstanz in MayGermany · 102 kmHigh 18.0°C · Low 11.2°C · 119 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Ulm) is explained once on the Ulm year overview and on the Sources, method and limits page.