Weather in Hannover in September 2025
Average weather
Average temperature in Hannover in September
Going from a maximum of +32°C during the day to a minimum of +9°C during the night, the temperature in September averages around +25°C.
The average maximum temperature goes down 4% by the end of the month, compared with the beginning of the month, from +22°C to +21°C.
Is Hannover warm or cold in September?
Hannover is typically mild in September.
Maximum temperatures go down compared to the previous month from +23°C to +19°C. The minimum temperature also goes down from +14°C to +11°C.
Pack a light jacket as it will be warm in the day and cool in the evenings.
Take a look at how September is compared to other months in Hannover:
Climate in Hannover in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +23°C | +19°C | +14°C | ||||
| Min. temperature | ||||||
| +6°C | +1°C | -6°C | ||||
| Max. temperature | ||||||
| +37°C | +32°C | +27°C | ||||
| Rainfall | ||||||
| 72 mm | 60 mm | 62 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 3 m/s | ||||
| Humidity | ||||||
| 73% | 79% | 83% | ||||
| Air pressure | ||||||
| 1014 HPa | 1015 HPa | 1014 HPa | ||||
| Sunny days | ||||||
| 5 | 6 | 4 | ||||
| Cloudy days | ||||||
| 7 | 7 | 9 | ||||
| Rainy days | ||||||
| 17 | 16 | 17 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September typically has worse weather conditions compared to August. It’s getting colder in September. From +23°C in the day, the average maximum temperature lowers to +19°C. As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 72 mm to 60 mm. Humidity rises from 73% to 79%. The average wind speed doesn’t change much during September, staying around 2 m/s. The good news is there are likely to be more sunny days in September, from 5 to 6.
October brings much the same weather, it remains ok.
Wind
The average wind speed is 2 m/s getting up to 4 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Hannover is gradually increasing during September, going from 1 m/s to 2 m/s over the course of the month.
Rain
How was the weather last September in Hannover?
Climate Change over Years
The climate in Hannover in September has not changed much over the last 43 years.
The average temperature was the lowest in 1987 (+11°C) and the highest in 2022 (+16°C). The driest year was 2018 with only 502 mm of rainfall, and the wettest year was 2023 with 1067 mm.
FAQ
Is September a good time to visit Hannover?
Can you sunbathe in Hannover in September?
Is Hannover rainy in September?
Is it sunny in Hannover in September?
Other cities in Germany
Monthly weather in Hannover
Source of the data
For this page, we’ve looked at the typical weather in Hannover, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.