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Hannover in September: Weather, Average temperature and Climate

Planning a trip and want to know what the weather in Hannover in September will be like? Take a look at our weather guide for Hannover, based on historical data.
Check flight prices to Hannover on Avionero:
September

Weather in Hannover in September 2025

OK Weather
Mild
🌧️
Rainy
If you plan to visit Hannover in September, the weather is typically alright, with an average high temperature of +66°F during the day and approximately 6 sunny days. Expect some rainy, though, as there are typically 16 rainy days in the month and around 60 mm of precipitation. The weather is changeable so you may have to pack for every eventuality. Search flights in one click on Avionero.

Average weather

☀️
+66°F
Avg. max. temperature
+34°F
Min.
+90°F
Max.
60 mm
Total precipitation
79%
Avg. humidity
2 m/s
Avg. wind
6 ☀️
Sunny Days
7 ⛅️
Cloudy
16 🌦
Rainy
Our opinion: Hannover has OK weather in September.

Average temperature in Hannover in September

Here are the expected maximum, average and minimum temperatures in Hannover for September based on the historical data.
Last Year
Historical Data

Going from a maximum of +90°F during the day to a minimum of +48°F during the night, the temperature in September averages around +77°F.

The average maximum temperature goes down 4% by the end of the month, compared with the beginning of the month, from +72°F to +70°F.

Is Hannover warm or cold in September?

Hannover is typically mild in September.

Maximum temperatures go down compared to the previous month from +73°F to +66°F. The minimum temperature also goes down from +57°F to +52°F.

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

Hannover weather looks like this, on average, in September and the surrounding months.
AugustSeptemberOctober
Avg. temperature
+73°F+66°F+57°F
Min. temperature
+43°F+34°F+21°F
Max. temperature
+99°F+90°F+81°F
Rainfall
72 mm60 mm62 mm
Wind
2 m/s2 m/s3 m/s
Humidity
73%79%83%
Air pressure
1014 HPa1015 HPa1014 HPa
Sunny days
564
Cloudy days
779
Rainy days
171617
Snowy days
000

September typically has worse weather conditions compared to August. It’s getting colder in September. From +73°F in the day, the average maximum temperature lowers to +66°F. 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

Wind speed in Hannover in September based on historical data.
Last Year
Historical Data

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

Amount of rainfall in mm during September in Hannover based on historical data.
Last Year
Historical Data
Typically, there is a 27% chance of rain on an average day in September, with total rainfall of approximately 47 mm. The maximum amount of rainfall per day is around 17 mm, which is considered light rain. On average, there are about 8 rainy days during September, so prepare to bring an umbrella.
Here’s how September is compared with other months in the amount of precipitation, total mm:
Hannover wettest month is July, where a typical day has a 58% chance of precipitation and 76 mm of rainfall per day. February, on the other hand, is the driest month with a mere 31% chance of precipitation and 38 mm of rainfall per day.

How was the weather last September in Hannover?

This is the weather in Hannover in September 2023:
1 September
☀️
+72°F
2 September
☁️
+76°F
3 September
☁️
+76°F
4 September
☀️
+80°F
5 September
☀️
+90°F
6 September
☀️
+90°F
7 September
☀️
+87°F
8 September
☀️
+90°F
9 September
☀️
+88°F
10 September
☀️
+86°F
11 September
☀️
+89°F
12 September
🌧️
+75°F
13 September
🌧️
+69°F
14 September
☀️
+68°F
15 September
☀️
+75°F
16 September
☀️
+81°F
17 September
☀️
+83°F
18 September
☀️
+75°F
19 September
☁️
+70°F
20 September
☀️
+77°F
21 September
☀️
+76°F
22 September
☀️
+69°F
23 September
🌧️
+66°F
24 September
☀️
+71°F
25 September
☀️
+72°F
26 September
☀️
+77°F
27 September
☀️
+79°F
28 September
☀️
+80°F
29 September
☀️
+78°F
30 September
☀️
+70°F
In September 2023 Hannover had 24 sunny days, 3 cloudy days, and 3 rainy days. The average maximum temperature was +77°F, with an absolute maximum of +90°F and a minimum of +66°F. The average humidity was 77%, with a maximum of 100% and a minimum of 40%. The average wind speed was 2 m/s, with a maximum of 8 m/s and a minimum of 0 m/s.
Are you planning a trip in September?

Climate Change Over the Years

This is how Hannover climate has changed over the last 43 years.

The climate in Hannover in September has not changed that much over the last 43 years.

The average temperature was the lowest in 1987 (+52°F) and the highest in 2022 (+61°F). The driest year was 2018 with only 502 mm of rainfall, and the wettest year was 2023 with 1067 mm.

FAQ

Frequently asked questions about the weather in Hannover in September:

Is September a good time to visit Hannover?

It’s always a good time to visit Hannover, but the weather is changeable in September, so plan a mix of indoor and outdoor activities and exploring, and pack for every eventuality.

Can you sunbathe in Hannover in September?

September has mild temperatures in Hannover. Not ideal for sunbathing, but still good for daytime outdoor activities, but plan for cool evenings. Pack a light jacket and shorts!

Is Hannover rainy in September?

Hannover is often rainy in September. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.

Is it sunny in Hannover in September?

Usually, it’s not very sunny in Hannover in September, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.

Other cities in Germany

Check out the weather for 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.