Pittsburgh
United States · North America
Year-round range: 24°F to 83°F
September
Excellent conditions this month
Your monthly fit score
Comfort fit by month.
Climate details▼
Temperature
Average highs and lows.
September has comfortable temperatures — not too hot, not too cold.
Shaded band = typical daily swing (P10 of night lows to P90 of afternoon peaks) — spans wider than avg high/low lines because it captures day-to-day variation.
| = SepPrecipitation
Monthly precipitation, wet-day risk, and snow signal where relevant.
September has moderate rainfall — occasional showers but mostly manageable.
Sunshine
Average hours of bright sun per day.
September has decent sunshine — a mix of sun and cloud.
Clear sky
Clear-sky share is the inverse of average cloud cover (100% minus cloud cover). Band labels follow standard meteorological categories; distribution within each band varies by day.
Air comfort by month
Humidity and heat feel by month.
September is mostly comfortable — low heat and humidity pressure.
Time-of-day patterns
Typical hourly rhythm for September.
Temperature by hour
Temperature by hour and month
Typical temperature through the day across the year (1996-2025 normals, local time). Shaded cells are nighttime.
In September, afternoons reach about 75° and nights settle near 59°.
▶Full month-by-month data
| Month | High °F | Low °F | Rain days | Rain (in) | Sun h/day | Humidity |
|---|---|---|---|---|---|---|
| Jan | 38°F | 24°F | 11 | 3.0in | 2.3h | 71.14285714285714% |
| Feb | 42°F | 25°F | 10 | 2.8in | 3.2h | 67.28571428571428% |
| Mar | 52°F | 33°F | 11 | 3.2in | 4.2h | 63.71428571428571% |
| Apr | 63°F | 43°F | 12 | 3.5in | 4.9h | 65% |
| May | 71°F | 53°F | 14 | 4.2in | 5.3h | 71.14285714285714% |
| Jun | 80°F | 62°F | 14 | 4.2in | 6.3h | 72.14285714285714% |
| Jul | 83°F | 66°F | 15 | 4.2in | 6.6h | 72.71428571428571% |
| Aug | 82°F | 65°F | 13 | 3.6in | 6.4h | 72.71428571428571% |
| Sep | 76°F | 59°F | 10 | 3.4in | 5.9h | 71.85714285714285% |
| Oct | 64°F | 48°F | 12 | 2.9in | 4.6h | 71.57142857142857% |
| Nov | 52°F | 38°F | 9 | 2.9in | 3.6h | 70.28571428571428% |
| Dec | 43°F | 30°F | 11 | 2.9in | 2.3h | 72.42857142857143% |