Atchison
United States · North America
Year-round range: 21°F to 88°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 61°.
▶Full month-by-month data
| Month | High °F | Low °F | Rain days | Rain (in) | Sun h/day | Humidity |
|---|---|---|---|---|---|---|
| Jan | 38°F | 21°F | 5 | 1.3in | 5.3h | 67.42857142857142% |
| Feb | 44°F | 25°F | 6 | 1.6in | 5.7h | 64.14285714285714% |
| Mar | 56°F | 36°F | 8 | 3.0in | 6.4h | 62.857142857142854% |
| Apr | 66°F | 46°F | 10 | 4.3in | 7.2h | 60.71428571428571% |
| May | 75°F | 57°F | 12 | 5.8in | 7.7h | 66.14285714285714% |
| Jun | 85°F | 67°F | 11 | 4.7in | 9.3h | 66.57142857142857% |
| Jul | 88°F | 71°F | 9 | 3.9in | 9.8h | 66.42857142857143% |
| Aug | 87°F | 69°F | 9 | 3.6in | 9.3h | 66.42857142857143% |
| Sep | 80°F | 62°F | 7 | 3.2in | 8.9h | 63.857142857142854% |
| Oct | 68°F | 50°F | 7 | 3.1in | 7.5h | 61.28571428571428% |
| Nov | 54°F | 37°F | 6 | 2.3in | 6h | 64.85714285714285% |
| Dec | 43°F | 27°F | 5 | 1.7in | 5.3h | 68.85714285714285% |