Ames
United States · North America
Year-round range: 14°F to 84°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 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 76° and nights settle near 57°.
▶Full month-by-month data
| Month | High °F | Low °F | Rain days | Rain (in) | Sun h/day | Humidity |
|---|---|---|---|---|---|---|
| Jan | 30°F | 14°F | 6 | 1.2in | 4.4h | 73.28571428571428% |
| Feb | 35°F | 17°F | 6 | 1.3in | 5.3h | 69.57142857142857% |
| Mar | 50°F | 30°F | 9 | 2.6in | 6h | 63.42857142857142% |
| Apr | 62°F | 41°F | 11 | 4.2in | 6.6h | 60% |
| May | 72°F | 53°F | 13 | 5.4in | 7.4h | 63.99999999999999% |
| Jun | 81°F | 63°F | 11 | 5.0in | 8.8h | 67.14285714285714% |
| Jul | 84°F | 67°F | 9 | 4.0in | 9.9h | 71.42857142857143% |
| Aug | 82°F | 65°F | 9 | 3.7in | 9.2h | 71.28571428571428% |
| Sep | 77°F | 58°F | 8 | 3.3in | 8.8h | 65.85714285714286% |
| Oct | 64°F | 46°F | 8 | 2.9in | 6.7h | 61.57142857142857% |
| Nov | 48°F | 33°F | 6 | 2.0in | 5.3h | 66% |
| Dec | 35°F | 21°F | 6 | 1.6in | 4.2h | 73% |