Pittsburgh, Pennsylvania weather in May

Averages from 2021–2025 (155 days of record).

Average high: 71°F
Average low: 52°F
Rainy days: ~15 per month
Total precipitation: 5.9 in
Warmest recorded: 87°F
Coldest recorded: 35°F

Expect May days in Pittsburgh, Pennsylvania to top out around 71°F and cool to about 52°F overnight, with roughly 15 days of measurable rain across the month. In recent years May has ranged from 35°F to 87°F.

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Current Pittsburgh, Pennsylvania forecast → · Historical data by Open-Meteo (ERA5).