Weather in Bonn in september
Climate normals based on 10 years of historical data for Bonn, Saksamaa.
Average high
21°C
Average low
12°C
Rainfall
80 mm
11 rainy days
Sunshine
4.0h/day
Niiskus
72%
How Hot Is Bonn in september?
Late summer in Bonn: 21°C afternoons, 12°C cooler nights. Temperatures climb 4°C over August's averages in Bonn.
Sunshine Hours in september
Mixed skies in Bonn: 4.0h of sun on a typical day, daylight from 7:05 am to 7:45 pm.
Does It Rain In Bonn In september?
Rain interrupts most days in Bonn: 80mm in 11 days.
Is Bonn Humid In september?
September brings sticky conditions to Bonn — humidity averages 72%, particularly noticeable in the afternoons.
Wind In Bonn In september
Wind stays light: 13 kph on a typical day in Bonn.
Cloud Cover In Bonn In september
Cloudy skies dominate Bonn in September — averaging 58% cloud cover.
Cities With Similar Weather In september
Weather in Bonn, month by month
| Month | High / Low | Vihm | |
|---|---|---|---|
| Jaanuari ilm | 6°C / 1°C | 99mm | Details → |
| Veebruari ilm | 8°C / 2°C | 76mm | Details → |
| Märtsi ilm | 11°C / 3°C | 84mm | Details → |
| Aprilli ilm | 15°C / 5°C | 58mm | Details → |
| Mai ilm | 19°C / 9°C | 75mm | Details → |
| Juuni ilm | 23°C / 13°C | 80mm | Details → |
| Juuli ilm | 24°C / 15°C | 89mm | Details → |
| Augusti ilm | 25°C / 15°C | 82mm | Details → |
| Septembri ilm | 21°C / 12°C | 80mm | |
| Oktoobri ilm | 16°C / 8°C | 77mm | Details → |
| Novembri ilm | 10°C / 5°C | 87mm | Details → |
| Detsembri ilm | 7°C / 3°C | 96mm | Details → |