Monthly Climate
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Best time to visit Hannover

August is the best time to visit Hannover for general sightseeing, with average highs of 23 °C and about 12 wet days. The comfortable season runs roughly May to September.

It depends what you are going for

One month rarely wins on everything. These are the best months on each measure taken on its own.

If you want Best month On that measure
Sightseeing and walking August comfort 87/100
The least cloud August 62 % average cloud cover
The least rain February 47 mm
Warmth July 23 °C
Cooler weather January 4.1 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days
1 August 87 23 °C 12
2 June 87 21 °C 11
3 July 86 23 °C 13
4 September 82 19 °C 10
5 May 78 18 °C 11
6 April 60 14 °C 10
7 October 59 14 °C 12
8 March 38 9.0 °C 12
9 November 37 8.2 °C 11
10 February 27 5.4 °C 11
11 December 24 4.8 °C 13
12 January 23 4.1 °C 12

When to think twice

January scores lowest with about 12 wet days and highs near 4.1 °C. That does not make it a bad month — it depends entirely on what you are travelling for. The numbers are all here; the judgement is yours.

The full year

Month Avg high Rainfall Cloud
January 4.1 °C 60 mm 77 %
February 5.4 °C 47 mm 74 %
March 9.0 °C 55 mm 71 %
April 13.9 °C 48 mm 63 %
May 17.8 °C 59 mm 64 %
June 20.8 °C 65 mm 65 %
July 23.0 °C 77 mm 63 %
August 22.8 °C 71 mm 62 %
September 18.7 °C 58 mm 65 %
October 13.6 °C 61 mm 70 %
November 8.2 °C 55 mm 77 %
December 4.8 °C 61 mm 79 %

Data sources and method

Normal period
1991–2020
Dataset version
era5-1991-2020-scores1.1
Last processed

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: comfort score, beach score, season boundaries. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.