Climate averages 1991–2020

Pittsburgh weather
in July.

A hot, wet month: the warmest and the 9th driest of the year.

Long-term climate patterns, not a forecast for a particular trip.

Average high 28.2°C Daytime mean, July

Average low 18.6°C Night-time mean, July

Rainfall 116 mm 14 days with ≥1 mm

Daylight 15 h Sunrise to sunset, per day

July is a hot month in Pittsburgh: daytime highs average 28.2°C and nights cool to about 18.6°C. By daytime temperature it is the warmest month of the year.

Expect about 116 mm of rain on roughly 14 days, which makes July a wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 45 min on an average July day.

The nearest other city in this atlas is Canton (Ohio), United States (123 km away). In July its highs average 27.5°C, 0.6°C cooler than Pittsburgh, with 87 mm of rain.

Among the 498 cities listed in the United States, Pittsburgh ranks joint 348th of 498 for the warmest July highs and joint 450th of 498 for the driest July (rainfall, lowest first). The mean July high of those 498 cities is 30.3°C; Pittsburgh is 2.1°C cooler than that mean.

From July to August, average highs fall by 0.7°C to 27.5°C, and monthly rainfall falls from 116 mm to 93 mm.

The annual picture

July in context

30-year average

Average highAverage low°C

Monthly rainfall

Average total · mm

Averages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated

Every month, side by side

Pittsburgh climate table

1991–2020

Monthly climate averages for Pittsburgh, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January	2.8°C-5.5°C	-5.5°C	92	12.0	9.610 h
February	4.8°C-4.7°C	-4.7°C	80	10.9	10.611 h
March	9.9°C-0.5°C	-0.5°C	108	12.9	11.912 h
April	16.6°C5.5°C	5.5°C	119	13.8	13.313 h
May	21.6°C11.3°C	11.3°C	123	14.3	14.414 h
June	26.0°C16.2°C	16.2°C	126	13.6	15.015 h
July, selected	28.2°C18.6°C	18.6°C	116	14.0	14.815 h
August	27.5°C17.9°C	17.9°C	93	11.9	13.814 h
September	23.9°C14.4°C	14.4°C	101	10.4	12.513 h
October	17.4°C8.4°C	8.4°C	93	10.7	11.211 h
November	10.6°C2.6°C	2.6°C	88	10.0	10.010 h
December	5.1°C-2.1°C	-2.1°C	89	11.6	9.39 h

Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.

Compare places

July in nearby cities

Distance from Pittsburgh

Read the numbers correctly

Climate, not a promise.

These patterns help compare months. They cannot tell you the weather on a specific day of your trip.

Sources, method and limits

How these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Pittsburgh) is explained once on the Pittsburgh year overview and on the Sources, method and limits page.