Aachen
Germany · Europe
Year-round range: 33°F to 72°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 is one of the wetter months — pack rain gear.
Sunshine
Average hours of bright sun per day.
September has decent sunshine — a mix of sun and cloud.
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 65° and nights settle near 54°.
▶Full month-by-month data
| Month | High °F | Low °F | Rain days | Rain (in) | Sun h/day | Humidity |
|---|---|---|---|---|---|---|
| Jan | 41°F | 33°F | 14 | 3.1in | 2.7h | 85.28571428571428% |
| Feb | 44°F | 34°F | 12 | 2.7in | 3.5h | 80.71428571428572% |
| Mar | 50°F | 37°F | 13 | 2.7in | 4.9h | 75.85714285714286% |
| Apr | 56°F | 41°F | 11 | 2.3in | 6.5h | 71.57142857142857% |
| May | 63°F | 48°F | 13 | 2.8in | 6.9h | 70.71428571428571% |
| Jun | 69°F | 54°F | 13 | 3.1in | 7.5h | 70.28571428571428% |
| Jul | 72°F | 57°F | 13 | 3.4in | 7.8h | 70.71428571428571% |
| Aug | 72°F | 57°F | 13 | 3.1in | 7.2h | 71.85714285714285% |
| Sep | 66°F | 52°F | 11 | 2.7in | 5.8h | 77.14285714285714% |
| Oct | 58°F | 47°F | 12 | 2.7in | 4h | 81.14285714285714% |
| Nov | 48°F | 40°F | 13 | 2.8in | 2.7h | 85.14285714285714% |
| Dec | 43°F | 35°F | 14 | 3.3in | 2.2h | 87% |