Hennef (Sieg) Weather in August
Average highs run from 26°C on August 1 to 22°C on August 31, and lows from 13°C to 11°C. Normal precipitation for the month is 83 mm over about 12 wet days.
August day by day
The normal high and low for each date, and the record, in °C.
- Normal low
- Normal high
- Record high
- Record low
August at a glance
- Average high
- 25°C
- Average low
- 13°C
- Precipitation
- 83 mm
- Record high
- 39°CAug 12, 2003
- Record low
- 2°CAug 29, 1993
- Daylight
- 15 h 19 min to 13 h 35 min
- Cloud cover
- 68%
- Humidity
- 71%
- Dew point
- 12°C
- Wind
- 13.3 km/h
Every day of the month
A wet day has at least 1 mm of precipitation in the reanalysis.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Aug 1 | 26°C | 13°C | 33°C 1995 | 6°C 1965 | 44% |
| Aug 2 | 26°C | 14°C | 36°C 2013 | 6°C 1935 | 44% |
| Aug 3 | 26°C | 14°C | 36°C 2018 | 7°C 1989 | 44% |
| Aug 4 | 26°C | 14°C | 36°C 1990 | 7°C 1987 | 44% |
| Aug 5 | 26°C | 13°C | 34°C 2003 | 8°C 1935 | 45% |
| Aug 6 | 27°C | 14°C | 36°C 2015 | 5°C 1987 | 45% |
| Aug 7 | 27°C | 14°C | 38°C 2018 | 5°C 1987 | 44% |
| Aug 8 | 25°C | 14°C | 38°C 2003 | 6°C 1990 | 45% |
| Aug 9 | 26°C | 14°C | 36°C 2020 | 6°C 1962 | 46% |
| Aug 10 | 25°C | 14°C | 34°C 2020 | 8°C 2016 | 46% |
| Aug 11 | 25°C | 13°C | 35°C 2003 | 6°C 2016 | 46% |
| Aug 12 | 25°C | 14°C | 39°C 2003 | 7°C 1965 | 47% |
| Aug 13 | 24°C | 13°C | 35°C 2026 | 6°C 1961 | 47% |
| Aug 14 | 24°C | 12°C | 38°C 2026 | 7°C 2013 | 48% |
| Aug 15 | 24°C | 13°C | 35°C 2001 | 5°C 1994 | 48% |
| Aug 16 | 25°C | 13°C | 34°C 1974 | 5°C 1994 | 48% |
| Aug 17 | 24°C | 13°C | 32°C 1973 | 5°C 1966 | 48% |
| Aug 18 | 25°C | 13°C | 34°C 1943 | 6°C 1981 | 47% |
| Aug 19 | 25°C | 13°C | 38°C 2012 | 6°C 1968 | 47% |
| Aug 20 | 25°C | 13°C | 36°C 1932 | 6°C 2014 | 46% |
| Aug 21 | 24°C | 13°C | 35°C 1943 | 5°C 1986 | 45% |
| Aug 22 | 24°C | 13°C | 32°C 1995 | 5°C 1964 | 45% |
| Aug 23 | 25°C | 13°C | 32°C 2022 | 6°C 1999 | 44% |
| Aug 24 | 24°C | 13°C | 34°C 2022 | 5°C 1966 | 44% |
| Aug 25 | 24°C | 13°C | 34°C 2001 | 4°C 1966 | 43% |
| Aug 26 | 24°C | 13°C | 35°C 2001 | 5°C 2018 | 41% |
| Aug 27 | 23°C | 12°C | 36°C 1964 | 5°C 1993 | 41% |
| Aug 28 | 22°C | 12°C | 35°C 1964 | 3°C 1978 | 42% |
| Aug 29 | 22°C | 11°C | 33°C 1942 | 2°C 1993 | 41% |
| Aug 30 | 22°C | 10°C | 34°C 2015 | 4°C 2007 | 41% |
| Aug 31 | 22°C | 11°C | 33°C 2019 | 5°C 1959 | 41% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+2).
- August 1
- sunrise 5:57 AM, sunset 9:16 PM
- August 31
- sunrise 6:43 AM, sunset 8:18 PM
Other months
Sources
Records: NOAA GHCN-Daily, station GME00121042, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.