August is one of the warmer months of the year in Hanover, with average highs near 29.4°C and lows around 17.6°C (mean 23.5°C). It is about average for rainfall, averaging 97 mm of rainfall and 68% relative humidity across the period.
August is one of the warmer months of the year in Hanover. Across 45 years of records, the warmest August in Hanover was 2016 — when the month averaged 25.7°C — while the coldest was 1994 at 21°C. Typical August days reach 29.4°C with nights near 17.6°C. The long-term trend is warming, about 0.3°C per decade.
August is about average for rainfall in Hanover, averaging 97 mm of rainfall. The wettest August on record was 2011 with 209 mm, while the driest was 1995 at 36 mm.
Relative humidity in Hanover during August averages 68%. The most humid August was 2018 at 84%, and the least humid was 2002 at 56%.
August receives about 5.4 kWh/m²/day of solar energy in Hanover. The sunniest August was 2022 at 6.2 kWh/m²/day, and the cloudiest were 1990 and 2000 at 4.7.
Average wind speed in Hanover during August is 1 m/s. The windiest August was 2023 at 1.2 m/s, while the calmest were 1996 and 2003 at 0.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 23.0°C | 23.1°C | 23.8°C | 23.5°C | 24.4°C | +1.4°C |
| Avg High | 29.1°C | 29.2°C | 29.5°C | 29.1°C | 30.3°C | +1.2°C |
| Avg Low | 16.8°C | 16.9°C | 18.1°C | 17.8°C | 18.5°C | +1.7°C |
| Avg Rain | 79 mm | 97 mm | 94 mm | 110 mm | 105 mm | +26 mm |
August temperatures in Hanover have risen by about 1.5°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 6°C (1982) to a record high of 38.6°C (1988).
Rainfall in August is about average for rainfall, averaging 97 mm, with a wettest year of 209 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.2°C per decade while lows rose 0.4°C per decade, narrowing the gap between day and night.
One of the best times to visit Hanover
August is one of the best times to visit Hanover. Expect days averaging 29.4°C and nights around 17.6°C (mean 23.5°C) — warmer than Hanover's yearly average — with higher rainfall (97 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 29.5°C | 22.9°C | 16.3°C | 35.2°C | 9.7°C | 38 mm | 60% | 1 m/s | 5.4 |
| 2024 | 29.4°C | 23.6°C | 17.9°C | 36.0°C | 10.7°C | 159 mm | 73% | 1 m/s | 5.4 |
| 2023 | 30.1°C | 24.1°C | 18.2°C | 33.7°C | 13.5°C | 76 mm | 65% | 1.2 m/s | 5.5 |
| 2022 | 31.9°C | 25.5°C | 19.1°C | 36.7°C | 13.7°C | 79 mm | 62% | 1 m/s | 6.2 |
| 2021 | 30.9°C | 25.5°C | 20.0°C | 36.4°C | 14.8°C | 146 mm | 71% | 0.9 m/s | 5.1 |
| 2020 | 30.2°C | 24.8°C | 19.3°C | 34.1°C | 14.7°C | 135 mm | 71% | 1 m/s | 5.2 |
| 2019 | 30.2°C | 24.3°C | 18.4°C | 34.4°C | 12.9°C | 75 mm | 68% | 0.9 m/s | 5.6 |
| 2018 | 27.8°C | 23.4°C | 19.0°C | 33.3°C | 13.4°C | 180 mm | 84% | 1 m/s | 5.5 |
| 2017 | 27.1°C | 21.8°C | 16.4°C | 32.3°C | 11.3°C | 120 mm | 75% | 0.9 m/s | 5.4 |
| 2016 🔥 | 31.6°C | 25.7°C | 19.8°C | 35.4°C | 13.6°C | 74 mm | 67% | 1 m/s | 6 |
| 2015 | 30.3°C | 23.8°C | 17.4°C | 35.5°C | 13.4°C | 70 mm | 61% | 1 m/s | 5.9 |
| 2014 | 27.8°C | 21.8°C | 15.8°C | 33.3°C | 10.8°C | 93 mm | 71% | 0.9 m/s | 5.4 |
| 2013 | 28.0°C | 22.4°C | 16.9°C | 32.5°C | 10.3°C | 102 mm | 72% | 0.9 m/s | 5 |
| 2012 | 29.5°C | 23.9°C | 18.4°C | 33.6°C | 13.6°C | 101 mm | 68% | 0.9 m/s | 5.4 |
| 2011 🌧️ | 28.4°C | 23.0°C | 17.6°C | 33.4°C | 11.5°C | 209 mm | 72% | 1.1 m/s | 5.2 |
| 2010 | 30.4°C | 24.4°C | 18.5°C | 36.1°C | 12.5°C | 78 mm | 65% | 1 m/s | 5.1 |
| 2009 | 28.5°C | 23.5°C | 18.5°C | 32.9°C | 12.6°C | 151 mm | 77% | 0.9 m/s | 5.3 |
| 2008 | 28.5°C | 22.2°C | 15.9°C | 32.4°C | 11.8°C | 55 mm | 64% | 1 m/s | 5.7 |
| 2007 | 30.0°C | 24.2°C | 18.4°C | 35.6°C | 13.7°C | 128 mm | 68% | 1 m/s | 5.2 |
| 2006 | 30.6°C | 24.5°C | 18.3°C | 36.4°C | 11.8°C | 49 mm | 63% | 1 m/s | 5.6 |
| 2005 | 30.9°C | 25.2°C | 19.5°C | 37.1°C | 13.0°C | 63 mm | 66% | 1 m/s | 5.2 |
| 2004 | 26.8°C | 21.7°C | 16.6°C | 31.0°C | 11.2°C | 127 mm | 80% | 0.9 m/s | 5.2 |
| 2003 | 28.0°C | 23.3°C | 18.7°C | 30.9°C | 10.8°C | 130 mm | 81% | 0.8 m/s | 4.9 |
| 2002 | 32.1°C | 25.6°C | 19.1°C | 38.0°C | 13.5°C | 70 mm | 56% | 1 m/s | 5.4 |
| 2001 | 31.7°C | 25.3°C | 18.9°C | 37.8°C | 15.4°C | 86 mm | 62% | 1 m/s | 5.3 |
| 2000 | 28.0°C | 22.4°C | 16.9°C | 32.8°C | 9.4°C | 78 mm | 69% | 1.1 m/s | 4.7 |
| 1999 | 30.2°C | 23.7°C | 17.3°C | 35.6°C | 10.9°C | 109 mm | 58% | 1.1 m/s | 5.3 |
| 1998 | 30.2°C | 23.9°C | 17.5°C | 33.6°C | 9.6°C | 72 mm | 64% | 1 m/s | 5.6 |
| 1997 | 28.3°C | 22.2°C | 16.1°C | 35.3°C | 11.4°C | 98 mm | 64% | 1.1 m/s | 5.3 |
| 1996 | 26.8°C | 21.6°C | 16.3°C | 31.0°C | 13.0°C | 85 mm | 78% | 0.8 m/s | 5.5 |
| 1995 | 32.5°C | 25.5°C | 18.5°C | 36.4°C | 13.9°C | 36 mm | 57% | 1 m/s | 5.7 |
| 1994 ❄️ | 26.6°C | 21.0°C | 15.5°C | 32.9°C | 8.8°C | 154 mm | 77% | 1 m/s | 5.1 |
| 1993 | 30.6°C | 24.2°C | 17.9°C | 35.5°C | 11.1°C | 93 mm | 64% | 0.9 m/s | 5.4 |
| 1992 | 27.9°C | 21.6°C | 15.3°C | 33.1°C | 10.2°C | 61 mm | 67% | 1.1 m/s | 5.4 |
| 1991 | 31.0°C | 24.7°C | 18.3°C | 37.5°C | 14.3°C | 98 mm | 60% | 1 m/s | 5.5 |
| 1990 | 27.9°C | 22.2°C | 16.6°C | 32.9°C | 12.8°C | 168 mm | 74% | 0.9 m/s | 4.7 |
| 1989 | 27.4°C | 22.1°C | 16.9°C | 31.1°C | 10.4°C | 55 mm | 76% | 0.9 m/s | 4.8 |
| 1988 | 31.4°C | 24.9°C | 18.4°C | 38.6°C | 10.5°C | 91 mm | 61% | 1.1 m/s | 5.4 |
| 1987 | 30.6°C | 24.0°C | 17.5°C | 36.3°C | 10.3°C | 74 mm | 60% | 1.1 m/s | 5.1 |
| 1986 | 27.7°C | 21.9°C | 16.1°C | 31.7°C | 6.9°C | 120 mm | 68% | 1.1 m/s | 5.4 |
| 1985 | 28.3°C | 22.6°C | 16.9°C | 34.5°C | 12.3°C | 71 mm | 66% | 1 m/s | 5.4 |
| 1984 | 27.4°C | 22.2°C | 16.9°C | 30.3°C | 8.3°C | 106 mm | 79% | 0.9 m/s | 5.7 |
| 1983 | 31.6°C | 24.9°C | 18.1°C | 38.2°C | 10.3°C | 67 mm | 61% | 1 m/s | — |
| 1982 | 28.3°C | 21.7°C | 15.0°C | 33.3°C | 6.0°C | 56 mm | 62% | 1 m/s | — |
| 1981 | 29.3°C | 22.5°C | 15.7°C | 32.6°C | 9.5°C | 72 mm | 62% | 1 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 29.4°C with lows near 17.6°C (mean 23.5°C), based on 45 years of NASA POWER data.
August averages 97 mm of rainfall in Hanover, about average for rainfall. The wettest on record was 209 mm in 2011.
The hottest August reached 38.6°C in 1988. The coldest dipped to 6°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 1.5°C. Daytime highs moved from 29°C to 30.4°C and overnight lows from 16.5°C to 18.3°C over the same span.
August is one of the warmer months of the year in Hanover and about average for rainfall, so plan for around 29.4°C daytime highs and 17.6°C at night.
Not quite — August is the 11th coolest month in Hanover, averaging 23.5°C.
For August in Hanover, pack light layers you can adjust through the day, with typical highs of 29.4°C and lows of 17.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 68% — moderately humid.
Average wind speed in August is 1 m/s. The windiest August on record averaged 1.2 m/s (2023).
The wettest August on record was 2011 with 209 mm. On average, August sees 97 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Hanover behaves each August, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for August specifically, along with year-by-year records and how the month has changed over the decades.
