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Siegen, North Rhine-Westphalia Weather by Month and Climate Averages
Monthly normals · Rain · Snow
Sunshine · Freeze dates · Records · Best time to visit
What is the weather like in Siegen, North Rhine-Westphalia?
Siegen, North Rhine-Westphalia gets 802 mm of precipitation a year over about 177 rainy days. July is the warmest month (average high 25°C) and January the coldest (average low -2°C).
Oceanic climate
Siegen, North Rhine-Westphalia has warm summers and cold winters. Daytime highs range from about 4°C in January to 25°C in July. December is usually the wettest month. The most comfortable time to visit is typically May to September, when daytime highs sit near 22°C.
| Season | Months | Avg low | Avg high |
|---|---|---|---|
| Winter | Dec–Feb | -2° | 4° |
| Spring | Mar–May | 3° | 15° |
| Summer | Jun–Aug | 11° | 24° |
| Autumn | Sep–Nov | 5° | 14° |
How much rain does Siegen get?
Siegen gets 802 mm of precipitation in an average year, spread over about 177 days with measurable rain. That is more rainy days than 75% of Germany.
December is the wettest month, with 87 mm. April is the driest, with 45 mm. December has the most rainy days, about 19.
The longest dry spell in the last five years lasted 15 days, to March 12, 2022.
Siegen weather by month
Siegen weather in January
In January, Siegen averages a high of 4°C and a low of -2°C. It gets 77 mm of precipitation over about 17 rainy days. Estimated sunshine is 15% of daylight hours, derived from ERA5 cloud cover. The January record high is 15°C (1999) and the record low is -23°C (1976).
Siegen weather in February
In February, Siegen averages a high of 6°C and a low of -2°C. It gets 60 mm of precipitation over about 15 rainy days. Estimated sunshine is 23% of daylight hours, derived from ERA5 cloud cover. The February record high is 20°C (2019) and the record low is -22°C (1985).
Siegen weather in March
In March, Siegen averages a high of 10°C and a low of 0°C. It gets 59 mm of precipitation over about 15 rainy days. Estimated sunshine is 36% of daylight hours, derived from ERA5 cloud cover. The March record high is 26°C (2021) and the record low is -16°C (1987).
Siegen weather in April
In April, Siegen averages a high of 15°C and a low of 2°C. It gets 45 mm of precipitation over about 13 rainy days. Estimated sunshine is 38% of daylight hours, derived from ERA5 cloud cover. The April record high is 29°C (2012) and the record low is -11°C (1986).
Siegen weather in May
In May, Siegen averages a high of 19°C and a low of 7°C. It gets 62 mm of precipitation over about 13 rainy days. Estimated sunshine is 36% of daylight hours, derived from ERA5 cloud cover. The May record high is 32°C (2005) and the record low is -4°C (1979). May is one of the most comfortable months to visit.
Siegen weather in June
In June, Siegen averages a high of 22°C and a low of 9°C. It gets 61 mm of precipitation over about 13 rainy days. Estimated sunshine is 40% of daylight hours, derived from ERA5 cloud cover. The June record high is 39°C (2019) and the record low is -2°C (1975). June is one of the most comfortable months to visit.
Siegen weather in July
In July, Siegen averages a high of 25°C and a low of 12°C. It gets 78 mm of precipitation over about 15 rainy days. Estimated sunshine is 35% of daylight hours, derived from ERA5 cloud cover. The July record high is 38°C (2015) and the record low is 1°C (1984). July is one of the most comfortable months to visit.
Siegen weather in August
In August, Siegen averages a high of 24°C and a low of 11°C. It gets 71 mm of precipitation over about 13 rainy days. Estimated sunshine is 38% of daylight hours, derived from ERA5 cloud cover. The August record high is 38°C (2003) and the record low is 1°C (1978). August is one of the most comfortable months to visit.
Siegen weather in September
In September, Siegen averages a high of 19°C and a low of 8°C. It gets 65 mm of precipitation over about 13 rainy days. Estimated sunshine is 39% of daylight hours, derived from ERA5 cloud cover. The September record high is 34°C (2020) and the record low is -2°C (1971). September is one of the most comfortable months to visit.
Siegen weather in October
In October, Siegen averages a high of 14°C and a low of 5°C. It gets 68 mm of precipitation over about 15 rainy days. Estimated sunshine is 21% of daylight hours, derived from ERA5 cloud cover. The October record high is 26°C (2011) and the record low is -8°C (1997).
Siegen weather in November
In November, Siegen averages a high of 8°C and a low of 2°C. It gets 69 mm of precipitation over about 17 rainy days. Estimated sunshine is 18% of daylight hours, derived from ERA5 cloud cover. The November record high is 21°C (2020) and the record low is -16°C (1988).
Siegen weather in December
In December, Siegen averages a high of 4°C and a low of -1°C. It gets 87 mm of precipitation over about 19 rainy days. Estimated sunshine is 12% of daylight hours, derived from ERA5 cloud cover. The December record high is 16°C (2022) and the record low is -19°C (1973).
Sunshine, humidity and wind in Siegen
June is the sunniest month in Siegen, with estimated sunshine of 40% of daylight hours from ERA5 cloud cover. December is the cloudiest, at 12%. The annual cloud-cover estimate is 29% of daylight hours; it is not a measurement of sunshine duration. Siegen is cloudier than 96% of Germany.
Humidity peaks in December at 91% and is lowest in April at 66%.
Siegen has about 4 days a year above 32°C. Siegen is hotter than 58% of Germany.
First and last freeze in Siegen
The first fall freeze in Siegen typically comes around October 13, and the last spring freeze around May 6. That leaves a frost-free growing season of about 160 days.
Siegen weather records
These records cover DILLENBURG during 1970–2023. Earlier records or other stations in the city may differ.
The hottest temperature on record at the Siegen station is 39°C, on June 30, 2019. The coldest is -23°C, on January 29, 1976.
The wettest day in the available station history brought 103 mm of precipitation, on September 17, 2006.
48 all-time records have been set at the station since 1970.
The annual mean temperature has changed by +0.4°C per decade since 1970.
The best time to visit Siegen
The most comfortable time to visit is typically May to September, when daytime highs sit near 22°C.
Winter (December–February) is cold, with average highs around 4°C and lows near -2°C.
Spring (March–May) is mild, with average highs around 15°C and lows near 3°C.
Summer (June–August) is warm, with average highs around 24°C and lows near 11°C. It can feel humid.
Autumn (September–November) is mild, with average highs around 14°C and lows near 5°C.
Monthly climate
| Month | Average low | Average high | Precip | Rain days | Humidity | Estimated sunshine | Record high | Record low |
|---|---|---|---|---|---|---|---|---|
| January | -2° | 4° | 77 mm | 17 | 89% | 15% | 15° | -23° |
| February | -2° | 6° | 60 mm | 15 | 83% | 23% | 20° | -22° |
| March | 0° | 10° | 59 mm | 15 | 71% | 36% | 26° | -16° |
| April | 2° | 15° | 45 mm | 13 | 66% | 38% | 29° | -11° |
| May | 7° | 19° | 62 mm | 13 | 68% | 36% | 32° | -4° |
| June | 9° | 22° | 61 mm | 13 | 66% | 40% | 39° | -2° |
| July | 12° | 25° | 78 mm | 15 | 68% | 35% | 38° | 1° |
| August | 11° | 24° | 71 mm | 13 | 70% | 38% | 38° | 1° |
| September | 8° | 19° | 65 mm | 13 | 76% | 39% | 34° | -2° |
| October | 5° | 14° | 68 mm | 15 | 86% | 21% | 26° | -8° |
| November | 2° | 8° | 69 mm | 17 | 89% | 18% | 21° | -16° |
| December | -1° | 4° | 87 mm | 19 | 91% | 12% | 16° | -19° |
Station: DILLENBURG, 23 km from the city. Temperature normal baseline: 1991–2020, calculated from available NOAA GHCN-Daily observations. Available station history: 1970–2023; record values refer to this station and period, not the entire city’s history. Precipitation includes rain and the water equivalent of frozen precipitation; snowfall depth is shown separately when available. Sources and methods
From ERA5 reanalysis. Sunshine is estimated from cloud cover.
Siegen climate questions
How much rain does Siegen get?
Siegen gets 802 mm of precipitation in an average year, over about 177 rainy days.
What is the wettest month in Siegen?
December is the wettest month in Siegen, with 87 mm. April is the driest, with 45 mm.
How many rainy days does Siegen have a year?
Siegen has about 177 days with measurable rain in an average year. December has the most, about 19.
What is the hottest month in Siegen?
July is the warmest month in Siegen, with an average high of 25°C.
What is the coldest month in Siegen?
January is the coldest month in Siegen, with an average low of -2°C.
What is the record high temperature in Siegen?
Within the available 1970–2023 station history, the record high at the Siegen station is 39°C, set on June 30, 2019. The record low is -23°C, on January 29, 1976.
What is the sunniest month in Siegen?
June is the sunniest month in Siegen, with estimated sunshine of 40% of daylight hours from ERA5 cloud cover. December is the cloudiest.
When is the first frost in Siegen?
The first fall freeze in Siegen typically comes around October 13. The last spring freeze is around May 6.
What is the best time to visit Siegen?
The most comfortable time to visit is typically May to September, when daytime highs sit near 22°C.