Irwin Weather Forecast
- 66
- 89
Thunderstorms Likely
- 47
- 77
Rain Showers
- 52
- 68
Chance Rain Showers
- 54
- 69
Rain Showers
- 59
- 73
Rain Showers
- 61
- 80
Rain Showers Likely
Today 19 May Westmoreland
Partly cloudy. Unseasonably warm with Highs in the upper 80s. Southwest Winds 10 to 15 Mph with Gusts up to 30 Mph.
Tonight 19 May Westmoreland
Showers and Thunderstorms likely. Warm with Lows in the mid 60s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 70 percent.
Irwin Temperature Statistics
May Temperature
Pittsburgh - Allegheny County Airport (11.2 miles)
Lowest 2 May, 2026
34 °FAverage May
53.5 °FHighest 5 May, 2026
73.9 °F
Climate (2021–Present)
Pittsburgh - Allegheny County Airport (11.2 miles)
Average Low 2021–2026
46 °FAverage 2021–2026
54.6 °FAverage High 2021–2026
63.4 °F