Hannover, Germany Climate & Monthly Averages
Hannover has an oceanic climate. August is the hottest month, averaging 76° by day; January is the coldest at 41°.
How weather changes through the year in Hannover
Hannover records 145 wet days and 7.6 hours of daily sunshine in an average year. Temperatures follow an oceanic pattern, running 41°F (5°C) in January up to 76°F (24°C) in August.
Hannover climate quick facts
- Hottest month: August - highs near 76°F (24°C)
- Coldest month: January - highs near 41°F (5°C)
- Decade extremes (2015-2024): 102°F (39°C) high · 2°F (-17°C) low
- Wettest month: July (13 rainy days) · Sunniest: June (11.7 h sun/day)
- Climate type: oceanic
- Annual swing: 17°C between the average warmest and coolest month · day to night: 7°C
- Snow: about 8 days a year
- Average humidity: 76%
Temperatures, rain and sunshine
January bottoms out at 41°F (5°C) in daylight, 33°F (1°C) after dark. Warmth peaks in August: highs of 76°F (24°C), lows of 59°F (15°C). The gridded 2015-2024 daily record for this location tops out at 102°F (39°C) and bottoms at 2°F (-17°C) - decade extremes, not all-time station records. Days and nights are about 7°C apart on average - narrower than about 75% of the cities we track.
Snow falls on roughly 8 days a year, mostly November through March. June is the brightest month at 11.7 hours of sun a day, against an annual average of 7.6 - duller than all but 9% of the 3496 cities in our dataset. July is the wettest month at 3.0 inches (76 mm) over 13 days; May is the driest.
Where Hannover sits among other climates
- 28% of the year's precipitation falls in its wettest three months - more evenly spread than almost every other city we track.
These comparisons use the same ten-year window for every city in the dataset.
Monthly climate table
| Month | High | Low | Rain days | Precipitation | Sunshine | Daylight | Wet-day chance | Humidity |
|---|---|---|---|---|---|---|---|---|
| January | 41° | 33° | 15 | 2.6 in | 3.0 h/day | 8.2 h | 49% | 84% |
| February | 45° | 34° | 12 | 2.6 in | 5.0 h/day | 9.8 h | 44% | 80% |
| March | 50° | 36° | 12 | 2.2 in | 6.9 h/day | 11.7 h | 40% | 76% |
| April | 57° | 40° | 10 | 1.8 in | 9.8 h/day | 13.8 h | 35% | 71% |
| May | 65° | 48° | 10 | 1.8 in | 11.1 h/day | 15.7 h | 32% | 68% |
| June | 73° | 56° | 10 | 2.5 in | 11.7 h/day | 16.8 h | 35% | 68% |
| July | 74° | 58° | 13 | 3.0 in | 11.2 h/day | 16.3 h | 41% | 69% |
| August | 76° | 59° | 12 | 2.3 in | 10.8 h/day | 14.7 h | 38% | 70% |
| September | 68° | 53° | 10 | 2.1 in | 9.1 h/day | 12.6 h | 32% | 74% |
| October | 59° | 48° | 13 | 2.6 in | 5.7 h/day | 10.5 h | 41% | 81% |
| November | 48° | 40° | 13 | 2.4 in | 3.9 h/day | 8.6 h | 44% | 86% |
| December | 44° | 37° | 14 | 2.8 in | 2.6 h/day | 7.7 h | 46% | 87% |
Hannover month by month
Each card shows the average high and low. The bar places that month between Hannover's coldest night and warmest afternoon.
January
- Rain
- 15 days
- Sunshine
- 3.0 h
- Daylight
- 8.2 h
- Snow
- 3 days
February
- Rain
- 12 days
- Sunshine
- 5.0 h
- Daylight
- 9.8 h
- Snow
- 2 days
March
- Rain
- 12 days
- Sunshine
- 6.9 h
- Daylight
- 11.7 h
- Snow
- 1 day
April
- Rain
- 10 days
- Sunshine
- 9.8 h
- Daylight
- 13.8 h
May
- Rain
- 10 days
- Sunshine
- 11.1 h
- Daylight
- 15.7 h
June
- Rain
- 10 days
- Sunshine
- 11.7 h
- Daylight
- 16.8 h
July
- Rain
- 13 days
- Sunshine
- 11.2 h
- Daylight
- 16.3 h
August
- Rain
- 12 days
- Sunshine
- 10.8 h
- Daylight
- 14.7 h
September
- Rain
- 10 days
- Sunshine
- 9.1 h
- Daylight
- 12.6 h
October
- Rain
- 13 days
- Sunshine
- 5.7 h
- Daylight
- 10.5 h
November
- Rain
- 13 days
- Sunshine
- 3.9 h
- Daylight
- 8.6 h
December
- Rain
- 14 days
- Sunshine
- 2.6 h
- Daylight
- 7.7 h
- Snow
- 1 day
Looking for warmer alternatives? Browse warm places by month, or compare Hannover's coolest part of the year: January, December, February.
A season-by-season guide to Hannover
Spring (March through May)
Spring in Hannover runs cool rather than cold, with daytime highs averaging 57°F (14°C) and nights around 41°F (5°C); rain falls on around 33 of the 90 days.
Summer (June through August)
Summer in Hannover is pleasantly warm, with daytime highs averaging 74°F (24°C) and nights around 58°F (14°C); rain falls on around 35 of the 90 days. Daylight is generous - around 11.2 hours of sun a day.
Fall (September through November)
Through fall, Hannover is crisp but comfortable: 59°F (15°C) by day, 47°F (8°C) after dark, and rain falls on around 35 of the 90 days.
Winter (December through February)
Winter in Hannover is brisk and cold, with daytime highs averaging 43°F (6°C) and nights around 35°F (1°C); rain falls on around 42 of the 90 days, plus about 6 snowy days.
Questions people ask about Hannover's climate
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The most useful weather window for Hannover
Best time to visit Hannover
May to June and August to September is the sweet spot for Hannover - warm days, manageable rainfall and plenty of daylight line up. Expect 71°F (21°C) in the afternoon and around 10 days of rain in a typical month of it. For the same question asked the other way round, see where else is warm in May.
What to pack
Pack for Hannover with a warm jacket and layers for the cooler season and proper waterproofs rather than an umbrella - wet days are the norm here. Note the gap between afternoon and night: August pairs 76°F (24°C) with 59°F (15°C).
Hannover temperature extremes in the 2015–2024 dataset
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ. Need another precipitation unit? Use the rainfall converter.