American Fork
United States · North America
Year-round range: 20°F to 92°F
September
Excellent conditions this month
Your monthly fit score
Comfort fit by month.
Climate details▼
Temperature
Average highs and lows.
September is warm and sunny — good beach and outdoor weather.
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 is one of the sunniest months — great for outdoor plans.
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 79° and nights settle near 56°.
▶Full month-by-month data
| Month | High °F | Low °F | Rain days | Rain (in) | Sun h/day | Humidity |
|---|---|---|---|---|---|---|
| Jan | 35°F | 20°F | 11 | 2.7in | 4.9h | 74.42857142857142% |
| Feb | 39°F | 23°F | 10 | 2.3in | 5.5h | 71% |
| Mar | 48°F | 30°F | 11 | 2.6in | 6.7h | 65.28571428571428% |
| Apr | 58°F | 37°F | 11 | 2.8in | 7.4h | 59.14285714285714% |
| May | 70°F | 46°F | 11 | 2.5in | 9h | 51.42857142857143% |
| Jun | 83°F | 58°F | 6 | 1.3in | 12h | 35.42857142857143% |
| Jul | 92°F | 66°F | 5 | 0.9in | 12.2h | 30.285714285714285% |
| Aug | 90°F | 64°F | 6 | 1.1in | 11.2h | 34.285714285714285% |
| Sep | 80°F | 56°F | 6 | 1.7in | 10.4h | 39.57142857142857% |
| Oct | 65°F | 43°F | 8 | 2.1in | 7.8h | 52.71428571428571% |
| Nov | 49°F | 30°F | 8 | 2.1in | 5.7h | 66% |
| Dec | 37°F | 21°F | 10 | 2.5in | 4.7h | 73.28571428571428% |