Monthly Climate
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Best time to visit Pittsburgh

September is the best time to visit Pittsburgh for general sightseeing, with average highs of 24 °C and about 10 wet days. The comfortable season runs roughly May to June.

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 September comfort 87/100
The least cloud September 53 % average cloud cover
The least rain February 80 mm
Warmth July 28 °C
Cooler weather January 3.1 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days
1 September 87 24 °C 10
2 May 82 22 °C 14
3 June 78 26 °C 14
4 October 76 18 °C 10
5 August 75 28 °C 12
6 July 69 28 °C 14
7 April 67 17 °C 14
8 November 50 11 °C 10
9 March 41 10 °C 13
10 February 28 5.1 °C 11
11 December 27 5.3 °C 11
12 January 26 3.1 °C 12

When to think twice

January scores lowest with about 12 wet days and highs near 3.1 °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 3.1 °C 92 mm 77 %
February 5.1 °C 80 mm 73 %
March 10.3 °C 107 mm 67 %
April 16.9 °C 117 mm 65 %
May 21.8 °C 123 mm 63 %
June 26.2 °C 127 mm 60 %
July 28.3 °C 112 mm 56 %
August 27.5 °C 96 mm 54 %
September 24.1 °C 100 mm 53 %
October 17.5 °C 90 mm 57 %
November 10.9 °C 88 mm 66 %
December 5.3 °C 90 mm 76 %

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.