Pittsburgh in September
7.6out of 10
Yes, a good time to go
Warm and comfortable: highs around 24°C. Frequent rain: about 10 rainy days.
24°CAvg high
14°CAvg low
10Rainy days (101 mm)
12:15 hDaylight
07:07Sunrise · 19:22 Sunset
Why this score
- Warm and comfortable: highs around 24°C
- Frequent rain: about 10 rainy days
- Rain varies a lot between years (±4.0 days)
What to wear and pack
- T-shirts and light layers
- A light jacket for cooler evenings
- Rain jacket or compact umbrella
How reliable is the forecast?
Rain in September varies a lot between years (±4.0 rainy days), so check the forecast closer to your trip. Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 3°C | -5°C | 92 mm | 12 | – | – | 3.9 |
| February | 5°C | -4°C | 79 mm | 11 | – | – | 4.5 |
| March | 10°C | 0°C | 108 mm | 13 | – | – | 5.2 |
| April | 17°C | 6°C | 118 mm | 14 | – | – | 6.3 |
| May | 22°C | 11°C | 123 mm | 15 | – | – | 6.9 |
| June | 26°C | 16°C | 126 mm | 14 | – | – | 7.1 |
| July | 28°C | 18°C | 116 mm | 14 | – | – | 7.0 |
| August | 27°C | 17°C | 94 mm | 12 | – | – | 7.4 |
| September | 24°C | 14°C | 101 mm | 10 | – | – | 7.6 |
| October | 17°C | 7°C | 93 mm | 11 | – | – | 6.8 |
| November | 11°C | 2°C | 88 mm | 10 | – | – | 5.9 |
| December | 5°C | -2°C | 89 mm | 12 | – | – | 4.5 |
Frequently asked questions
How hot is Pittsburgh in September?
Daytime highs average 24°C and nights about 14°C.
When is the best time to visit Pittsburgh?
The best months are September, August, June, July.