Hyperlocal rainfall totals + real-time NOAA forecasts
Accurate weather without the clutter
Hannover, Lower Saxony Weather by Month and Climate Averages
Monthly normals · Rain · Snow
Sunshine · Freeze dates · Records · Best time to visit
What is the weather like in Hannover, Lower Saxony?
Hannover, Lower Saxony gets 626 mm of precipitation a year over about 167 rainy days. July is the warmest month (average high 24°C) and January the coldest (average low -1°C).
Oceanic climate
Hannover, Lower Saxony has warm summers and chilly winters. Daytime highs range from about 4°C in January to 24°C in July. July is usually the wettest month. The most comfortable time to visit is typically May to June and August to September, when daytime highs sit near 21°C.
| Season | Months | Avg low | Avg high |
|---|---|---|---|
| Winter | Dec–Feb | 0° | 5° |
| Spring | Mar–May | 4° | 14° |
| Summer | Jun–Aug | 13° | 23° |
| Autumn | Sep–Nov | 7° | 14° |
How much rain does Hannover get?
Hannover gets 626 mm of precipitation in an average year, spread over about 167 days with measurable rain. That is fewer rainy days than 53% of Germany.
July is the wettest month, with 68 mm. April is the driest, with 36 mm. December has the most rainy days, about 16.
The longest dry spell in the last five years lasted 23 days, to May 6, 2022.
From October 2025 to September 2026 Hannover got 547 mm of rain, against a normal of 626 mm for those months. May 2026 had the most, with 109 mm.
Hannover weather by month
Hannover weather in January
In January, Hannover averages a high of 4°C and a low of -1°C. It gets 53 mm of precipitation over about 16 rainy days. Estimated sunshine is 20% of daylight hours, derived from ERA5 cloud cover. The January record high is 17°C (2023) and the record low is -22°C (1987).
Hannover weather in February
In February, Hannover averages a high of 6°C and a low of -1°C. It gets 40 mm of precipitation over about 14 rainy days. Estimated sunshine is 23% of daylight hours, derived from ERA5 cloud cover. The February record high is 19°C (2021) and the record low is -22°C (1986).
Hannover weather in March
In March, Hannover averages a high of 9°C and a low of 1°C. It gets 45 mm of precipitation over about 14 rainy days. Estimated sunshine is 37% of daylight hours, derived from ERA5 cloud cover. The March record high is 24°C (1989) and the record low is -18°C (1987).
Hannover weather in April
In April, Hannover averages a high of 14°C and a low of 4°C. It gets 36 mm of precipitation over about 11 rainy days. Estimated sunshine is 37% of daylight hours, derived from ERA5 cloud cover. The April record high is 28°C (1996) and the record low is -7°C (2013).
Hannover weather in May
In May, Hannover averages a high of 19°C and a low of 8°C. It gets 52 mm of precipitation over about 12 rainy days. Estimated sunshine is 36% of daylight hours, derived from ERA5 cloud cover. The May record high is 32°C (2018) and the record low is -3°C (1980). May is one of the most comfortable months to visit.
Hannover weather in June
In June, Hannover averages a high of 22°C and a low of 11°C. It gets 53 mm of precipitation over about 13 rainy days. Estimated sunshine is 38% of daylight hours, derived from ERA5 cloud cover. The June record high is 38°C (2026) and the record low is 1°C (1977). June is one of the most comfortable months to visit.
Hannover weather in July
In July, Hannover averages a high of 24°C and a low of 13°C. It gets 68 mm of precipitation over about 14 rainy days. Estimated sunshine is 34% of daylight hours, derived from ERA5 cloud cover. The July record high is 39°C (2022) and the record low is 5°C (1978).
Hannover weather in August
In August, Hannover averages a high of 24°C and a low of 13°C. It gets 65 mm of precipitation over about 14 rainy days. Estimated sunshine is 37% of daylight hours, derived from ERA5 cloud cover. The August record high is 37°C (1992) and the record low is 3°C (1980). August is one of the most comfortable months to visit.
Hannover weather in September
In September, Hannover averages a high of 19°C and a low of 10°C. It gets 52 mm of precipitation over about 12 rainy days. Estimated sunshine is 39% of daylight hours, derived from ERA5 cloud cover. The September record high is 32°C (2016) and the record low is -1°C (1977). September is one of the most comfortable months to visit.
Hannover weather in October
In October, Hannover averages a high of 14°C and a low of 7°C. It gets 57 mm of precipitation over about 14 rainy days. Estimated sunshine is 25% of daylight hours, derived from ERA5 cloud cover. The October record high is 27°C (2018) and the record low is -7°C (2003).
Hannover weather in November
In November, Hannover averages a high of 8°C and a low of 3°C. It gets 52 mm of precipitation over about 15 rainy days. Estimated sunshine is 22% of daylight hours, derived from ERA5 cloud cover. The November record high is 21°C (2020) and the record low is -16°C (1973).
Hannover weather in December
In December, Hannover averages a high of 5°C and a low of 1°C. It gets 55 mm of precipitation over about 16 rainy days. Estimated sunshine is 16% of daylight hours, derived from ERA5 cloud cover. The December record high is 17°C (2022) and the record low is -20°C (2009).
Sunshine, humidity and wind in Hannover
September is the sunniest month in Hannover, with estimated sunshine of 39% of daylight hours from ERA5 cloud cover. December is the cloudiest, at 16%. The annual cloud-cover estimate is 30% of daylight hours; it is not a measurement of sunshine duration. Hannover is cloudier than 77% of Germany.
Humidity peaks in December at 87% and is lowest in April at 66%.
Hannover has about 3 days a year above 32°C. Hannover is cooler than 66% of Germany.
First and last freeze in Hannover
The first fall freeze in Hannover typically comes around October 25, and the last spring freeze around April 23. That leaves a frost-free growing season of about 185 days.
Hannover weather records
These records cover HANNOVER during 1970–2026. Earlier records or other stations in the city may differ.
The hottest temperature on record at the Hannover station is 39°C, on July 20, 2022. The coldest is -22°C, on January 14, 1987.
The wettest day in the available station history brought 79 mm of precipitation, on August 26, 2010.
40 all-time records have been set at the station since 1970.
The annual mean temperature has changed by +0.4°C per decade since 1970.
The best time to visit Hannover
The most comfortable time to visit is typically May to June and August to September, when daytime highs sit near 21°C.
Winter (December–February) is chilly, with average highs around 5°C and lows near 0°C.
Spring (March–May) is mild, with average highs around 14°C and lows near 4°C.
Summer (June–August) is warm, with average highs around 23°C and lows near 13°C.
Autumn (September–November) is mild, with average highs around 14°C and lows near 7°C.
Monthly climate
| Month | Average low | Average high | Precip | Rain days | Humidity | Estimated sunshine | Record high | Record low |
|---|---|---|---|---|---|---|---|---|
| January | -1° | 4° | 53 mm | 16 | 84% | 20% | 17° | -22° |
| February | -1° | 6° | 40 mm | 14 | 79% | 23% | 19° | -22° |
| March | 1° | 9° | 45 mm | 14 | 71% | 37% | 24° | -18° |
| April | 4° | 14° | 36 mm | 11 | 66% | 37% | 28° | -7° |
| May | 8° | 19° | 52 mm | 12 | 67% | 36% | 32° | -3° |
| June | 11° | 22° | 53 mm | 13 | 66% | 38% | 38° | 1° |
| July | 13° | 24° | 68 mm | 14 | 68% | 34% | 39° | 5° |
| August | 13° | 24° | 65 mm | 14 | 69% | 37% | 37° | 3° |
| September | 10° | 19° | 52 mm | 12 | 74% | 39% | 32° | -1° |
| October | 7° | 14° | 57 mm | 14 | 82% | 25% | 27° | -7° |
| November | 3° | 8° | 52 mm | 15 | 84% | 22% | 21° | -16° |
| December | 1° | 5° | 55 mm | 16 | 87% | 16% | 17° | -20° |
Station: HANNOVER, 11 km from the city. Temperature normal baseline: 1991–2020, calculated from available NOAA GHCN-Daily observations. Available station history: 1970–2026; record values refer to this station and period, not the entire city’s history. Precipitation includes rain and the water equivalent of frozen precipitation; snowfall depth is shown separately when available. Sources and methods
From ERA5 reanalysis. Sunshine is estimated from cloud cover.
Hannover climate questions
How much rain does Hannover get?
Hannover gets 626 mm of precipitation in an average year, over about 167 rainy days.
What is the wettest month in Hannover?
July is the wettest month in Hannover, with 68 mm. April is the driest, with 36 mm.
How many rainy days does Hannover have a year?
Hannover has about 167 days with measurable rain in an average year. December has the most, about 16.
What is the hottest month in Hannover?
July is the warmest month in Hannover, with an average high of 24°C.
What is the coldest month in Hannover?
January is the coldest month in Hannover, with an average low of -1°C.
What is the record high temperature in Hannover?
Within the available 1970–2026 station history, the record high at the Hannover station is 39°C, set on July 20, 2022. The record low is -22°C, on January 14, 1987.
What is the sunniest month in Hannover?
September is the sunniest month in Hannover, with estimated sunshine of 39% of daylight hours from ERA5 cloud cover. December is the cloudiest.
When is the first frost in Hannover?
The first fall freeze in Hannover typically comes around October 25. The last spring freeze is around April 23.
What is the best time to visit Hannover?
The most comfortable time to visit is typically May to June and August to September, when daytime highs sit near 21°C.