Climate averages 1991–2020
Bonn weather
in July.
A warm, moderately wet month: the warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a warm month in Bonn: daytime highs average 23.4°C and nights cool to about 14.8°C. By daytime temperature it is the warmest month of the year.
Expect about 74 mm of rain on roughly 13 days, which makes July a moderately wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 16 h 01 min on an average July day.
The nearest other city in this atlas is Troisdorf (9 km away). In July its highs average 23.2°C, about as warm as Bonn, with 77 mm of rain.
Among the 120 cities listed in Germany, Bonn ranks joint 38th of 120 for the warmest July highs and joint 24th of 120 for the driest July (rainfall, lowest first). The mean July high of those 120 cities is 23.0°C; Bonn is 0.3°C warmer than that mean.
From July to August, average highs fall by 0.1°C to 23.2°C, and monthly rainfall rises from 74 mm to 78 mm.
The annual picture
July 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
Bonn climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 5.4°C0.7°C | 0.7°C | 63 | 13.1 | 8.59 h |
| February | 6.6°C0.7°C | 0.7°C | 55 | 11.5 | 10.010 h |
| March | 10.3°C2.5°C | 2.5°C | 59 | 12.8 | 11.812 h |
| April | 14.5°C5.3°C | 5.3°C | 48 | 10.4 | 13.814 h |
| May | 18.3°C9.3°C | 9.3°C | 61 | 11.6 | 15.515 h |
| June | 21.3°C12.5°C | 12.5°C | 71 | 11.8 | 16.416 h |
| July, selected | 23.4°C14.8°C | 14.8°C | 74 | 12.6 | 16.016 h |
| August | 23.2°C14.6°C | 14.6°C | 78 | 11.8 | 14.515 h |
| September | 19.3°C11.5°C | 11.5°C | 62 | 10.5 | 12.713 h |
| October | 14.5°C8.3°C | 8.3°C | 65 | 11.6 | 10.811 h |
| November | 9.3°C4.6°C | 4.6°C | 66 | 12.7 | 9.09 h |
| December | 6.0°C1.7°C | 1.7°C | 75 | 14.9 | 8.18 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
July in nearby cities
- Troisdorf in JulyGermany · 9 kmHigh 23.2°C · Low 14.7°C · 77 mm rain
- Köln in JulyGermany · 24 kmHigh 23.0°C · Low 14.6°C · 80 mm rain
- Bergisch Gladbach in JulyGermany · 28 kmHigh 23.0°C · Low 14.8°C · 88 mm rain
- Leverkusen in JulyGermany · 34 kmHigh 23.2°C · Low 14.9°C · 80 mm rain
- Düren in JulyGermany · 43 kmHigh 22.5°C · Low 14.2°C · 80 mm rain
- Solingen in JulyGermany · 49 kmHigh 22.0°C · Low 14.0°C · 98 mm rain
- Remscheid in JulyGermany · 50 kmHigh 21.2°C · Low 13.3°C · 105 mm rain
- Koblenz in JulyGermany · 54 kmHigh 23.6°C · Low 14.9°C · 62 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 Bonn) is explained once on the Bonn year overview and on the Sources, method and limits page.