Climate averages 1991–2020
Iserlohn weather
in August.
A mild, moderately wet month: the 2nd warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a mild month in Iserlohn: daytime highs average 21.2°C and nights cool to about 13.5°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 84 mm of rain on roughly 13 days, which makes August a moderately wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 36 min on an average August day.
The nearest other city in this atlas is Hagen (16 km away). In August its highs average 22.2°C, 0.9°C warmer than Iserlohn, with 103 mm of rain.
Among the 120 cities listed in Germany, Iserlohn ranks joint 114th of 120 for the warmest August highs and joint 96th of 120 for the driest August (rainfall, lowest first). The mean August high of those 120 cities is 22.9°C; Iserlohn is 1.7°C cooler than that mean.
From August to September, average highs fall by 3.8°C to 17.5°C, and monthly rainfall falls from 84 mm to 72 mm.
The annual picture
August 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
Iserlohn climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 3.7°C-0.7°C | -0.7°C | 81 | 14.5 | 8.48 h |
| February | 4.7°C-0.8°C | -0.8°C | 67 | 12.4 | 9.910 h |
| March | 8.4°C1.4°C | 1.4°C | 71 | 13.5 | 11.812 h |
| April | 12.8°C4.4°C | 4.4°C | 55 | 11.2 | 13.814 h |
| May | 16.5°C8.3°C | 8.3°C | 67 | 12.6 | 15.616 h |
| June | 19.4°C11.4°C | 11.4°C | 72 | 12.7 | 16.517 h |
| July | 21.4°C13.6°C | 13.6°C | 86 | 14.0 | 16.116 h |
| August, selected | 21.2°C13.5°C | 13.5°C | 84 | 13.1 | 14.615 h |
| September | 17.5°C10.6°C | 10.6°C | 72 | 12.3 | 12.713 h |
| October | 12.8°C7.3°C | 7.3°C | 72 | 12.7 | 10.711 h |
| November | 7.8°C3.4°C | 3.4°C | 75 | 13.7 | 8.99 h |
| December | 4.4°C0.5°C | 0.5°C | 85 | 14.7 | 8.08 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
August in nearby cities
- Hagen in AugustGermany · 16 kmHigh 22.2°C · Low 14.5°C · 103 mm rain
- Lüdenscheid in AugustGermany · 18 kmHigh 20.4°C · Low 12.8°C · 99 mm rain
- Dortmund in AugustGermany · 23 kmHigh 22.4°C · Low 14.3°C · 87 mm rain
- Witten in AugustGermany · 25 kmHigh 22.2°C · Low 14.5°C · 85 mm rain
- Arnsberg in AugustGermany · 26 kmHigh 21.1°C · Low 13.3°C · 84 mm rain
- Lünen in AugustGermany · 29 kmHigh 22.6°C · Low 14.4°C · 87 mm rain
- Castrop-Rauxel in AugustGermany · 34 kmHigh 22.5°C · Low 14.3°C · 85 mm rain
- Hamm in AugustGermany · 35 kmHigh 22.5°C · Low 14.3°C · 75 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 Iserlohn) is explained once on the Iserlohn year overview and on the Sources, method and limits page.