Monthly Climate
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Best time to visit St. Petersburg

December is the best time to visit St. Petersburg for general sightseeing, with average highs of 21 °C and about 5 wet days. The comfortable season runs roughly November to April. The sea stays above 20 °C from March to December.

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 December comfort 94/100
A beach holiday May sea 26 °C
The least cloud May 40 % average cloud cover
The least rain November 41 mm
Warmth August 30 °C
Cooler weather January 20 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days Beach
1 December 94 21 °C 5 68
2 November 93 24 °C 4 88
3 March 91 22 °C 6 69
4 February 91 20 °C 6 56
5 January 90 20 °C 6 53
6 April 87 25 °C 6 88
7 October 76 27 °C 8 89
8 May 73 28 °C 8 89
9 September 53 29 °C 17 67
10 June 52 30 °C 18 69
11 July 47 30 °C 22 64
12 August 46 30 °C 23 63

For a beach holiday

May scores highest, with a sea temperature of 26 °C and air temperatures around 28 °C. The sea is above 20 °C from March to December.

Month Sea Air Sunshine Beach score
January 18 °C 20 °C 51 % 53
February 18 °C 20 °C 47 % 56
March 20 °C 22 °C 44 % 69
April 23 °C 25 °C 42 % 88
May 26 °C 28 °C 40 % 89
June 28 °C 30 °C 58 % 69
July 30 °C 30 °C 64 % 64
August 30 °C 30 °C 63 % 63
September 29 °C 29 °C 60 % 67
October 27 °C 27 °C 47 % 89
November 23 °C 24 °C 43 % 88
December 20 °C 21 °C 48 % 68

When to think twice

August scores lowest with about 23 wet days and highs near 30 °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 19.5 °C 61 mm 51 %
February 20.4 °C 45 mm 47 %
March 22.3 °C 57 mm 44 %
April 25.2 °C 50 mm 42 %
May 28.2 °C 63 mm 40 %
June 29.5 °C 149 mm 58 %
July 29.9 °C 149 mm 64 %
August 30.0 °C 155 mm 63 %
September 29.4 °C 131 mm 60 %
October 27.2 °C 61 mm 47 %
November 23.7 °C 41 mm 43 %
December 21.1 °C 53 mm 48 %

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.