See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
07:11
Sunrise
19:33
Sunset
Moon
Waxing Crescent
12:25
Moonrise
20:45
Moonset
Daily Forecast
Today
Wednesday
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
Air Quality Data Available
Upgrade to access real-time air quality data for Siegen.
Resources
UV Index
Humidity
Weather in Siegen today, September 15, 2026
Siegen starts September 15, 2026 looking damp, with rain in the forecast and wetter spells likely at times. Waterproof kit is the safer call for early plans. The first half of the day looks overcast, as cloud amounts reach about 73% around 09:00. Brighter weather, if it comes, waits until later.
The day peaks near 25°C and cools toward 15°C. Moisture in the air spans 62%-97%, with the highest values around 06:00. Expect gentle winds, highest near 14:00 at 2.8 km/h.
Expect persistent cloud later on, with amounts around 68% by 23:00. Sunshine remains the exception, not the rule. Visibility stays generally good near 30.4 km on average, though it can drop toward 5.8 km in thicker cloud or showers. Expect sunrise at 07:11, sunset at 19:33, and 12 hours 21 minutes of sunlight today overall.
Taken together, Siegen looks wet enough on September 15, 2026 that flexible outdoor plans work best, with temperatures peaking near 25°C.
Frequently asked questions about weather in Siegen
How warm does it get in Siegen?
The warmest month in Siegen is August, with average high temperatures of 23°C. The average temperature during this period is around 18°C.
How cold does it get in Siegen?
The coldest month in Siegen is January, with average low temperatures of -1°C. The average temperature during this period is around 1°C.
What is the wettest time of year in Siegen?
The wettest month in Siegen is January, with an average of 128mm of precipitation.
What is the driest time of year in Siegen?
The driest month in Siegen is April, with an average of 67mm of precipitation.
Explore more weather forecasts
- Netphen, Nordrhein-Westfalen
- Berlin, Land Berlin
- Kreuztal, Nordrhein-Westfalen
- Hamburg, Free and Hanseatic City of Hamburg
- Freudenberg, Nordrhein-Westfalen
- Munich, Bavaria
- Hilchenbach, Nordrhein-Westfalen
- Köln, Nordrhein-Westfalen
- Olpe, Nordrhein-Westfalen
- Frankfurt am Main, Hessen
- Drolshagen, Nordrhein-Westfalen
- Stuttgart, Baden-Württemberg
- Lennestadt, Nordrhein-Westfalen
- Düsseldorf, Nordrhein-Westfalen
- Waldbröl, Nordrhein-Westfalen
- Essen, Nordrhein-Westfalen
