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Zwolle, Overijssel Weather by Month and Climate Averages
Monthly normals · Rain · Snow
Sunshine · Freeze dates · Records · Best time to visit
What is the weather like in Zwolle, Overijssel?
Zwolle, Overijssel gets 775 mm of precipitation a year over about 178 rainy days. July is the warmest month (average high 24°C) and January the coldest (average low 1°C).
Oceanic climate
Zwolle, Overijssel has warm summers and chilly winters. Daytime highs range from about 5°C in January to 24°C in July. August is usually the wettest month. The most comfortable time to visit is typically May to July and September, when daytime highs sit near 21°C.
| Season | Months | Avg low | Avg high |
|---|---|---|---|
| Winter | Dec–Feb | 1° | 6° |
| Spring | Mar–May | 4° | 15° |
| Summer | Jun–Aug | 12° | 23° |
| Autumn | Sep–Nov | 7° | 14° |
How much rain does Zwolle get?
Zwolle gets 775 mm of precipitation in an average year, spread over about 178 days with measurable rain. That is more rainy days than 78% of Germany.
August is the wettest month, with 98 mm. April is the driest, with 30 mm. December has the most rainy days, about 19.
The longest dry spell in the last five years lasted 28 days, to June 19, 2023.
From October 2025 to September 2026 Zwolle got 666 mm of rain, against a normal of 775 mm for those months. October 2025 had the most, with 114 mm.
Zwolle weather by month
Zwolle weather in January
In January, Zwolle averages a high of 6°C and a low of 1°C. It gets 76 mm of precipitation over about 18 rainy days. Estimated sunshine is 22% of daylight hours, derived from ERA5 cloud cover. The January record high is 16°C (2023) and the record low is -17°C (2009).
Zwolle weather in February
In February, Zwolle averages a high of 7°C and a low of 1°C. It gets 57 mm of precipitation over about 15 rainy days. Estimated sunshine is 25% of daylight hours, derived from ERA5 cloud cover. The February record high is 19°C (2019) and the record low is -16°C (2021).
Zwolle weather in March
In March, Zwolle averages a high of 10°C and a low of 2°C. It gets 58 mm of precipitation over about 14 rainy days. Estimated sunshine is 36% of daylight hours, derived from ERA5 cloud cover. The March record high is 24°C (2021) and the record low is -9°C (2018).
Zwolle weather in April
In April, Zwolle averages a high of 16°C and a low of 4°C. It gets 30 mm of precipitation over about 11 rainy days. Estimated sunshine is 38% of daylight hours, derived from ERA5 cloud cover. The April record high is 28°C (2018) and the record low is -6°C (2022).
Zwolle weather in May
In May, Zwolle averages a high of 19°C and a low of 8°C. It gets 50 mm of precipitation over about 13 rainy days. Estimated sunshine is 37% of daylight hours, derived from ERA5 cloud cover. The May record high is 32°C (2017) and the record low is -1°C (2011). May is one of the most comfortable months to visit.
Zwolle weather in June
In June, Zwolle averages a high of 22°C and a low of 11°C. It gets 64 mm of precipitation over about 12 rainy days. Estimated sunshine is 40% of daylight hours, derived from ERA5 cloud cover. The June record high is 37°C (2026) and the record low is 3°C (2009). June is one of the most comfortable months to visit.
Zwolle weather in July
In July, Zwolle averages a high of 24°C and a low of 13°C. It gets 76 mm of precipitation over about 15 rainy days. Estimated sunshine is 34% of daylight hours, derived from ERA5 cloud cover. The July record high is 39°C (2019) and the record low is 5°C (2019). July is one of the most comfortable months to visit.
Zwolle weather in August
In August, Zwolle averages a high of 23°C and a low of 12°C. It gets 98 mm of precipitation over about 17 rainy days. Estimated sunshine is 40% of daylight hours, derived from ERA5 cloud cover. The August record high is 37°C (2018) and the record low is 4°C (2025).
Zwolle weather in September
In September, Zwolle averages a high of 19°C and a low of 9°C. It gets 59 mm of precipitation over about 13 rainy days. Estimated sunshine is 38% of daylight hours, derived from ERA5 cloud cover. The September record high is 32°C (2020) and the record low is 1°C (2012). September is one of the most comfortable months to visit.
Zwolle weather in October
In October, Zwolle averages a high of 15°C and a low of 7°C. It gets 65 mm of precipitation over about 15 rainy days. Estimated sunshine is 26% of daylight hours, derived from ERA5 cloud cover. The October record high is 28°C (2018) and the record low is -4°C (2012).
Zwolle weather in November
In November, Zwolle averages a high of 9°C and a low of 4°C. It gets 66 mm of precipitation over about 17 rainy days. Estimated sunshine is 24% of daylight hours, derived from ERA5 cloud cover. The November record high is 20°C (2014) and the record low is -7°C (2022).
Zwolle weather in December
In December, Zwolle averages a high of 6°C and a low of 2°C. It gets 78 mm of precipitation over about 19 rainy days. Estimated sunshine is 16% of daylight hours, derived from ERA5 cloud cover. The December record high is 17°C (2022) and the record low is -14°C (2009).
Sunshine, humidity and wind in Zwolle
June is the sunniest month in Zwolle, with estimated sunshine of 40% of daylight hours from ERA5 cloud cover. December is the cloudiest, at 16%. The annual cloud-cover estimate is 31% of daylight hours; it is not a measurement of sunshine duration. Zwolle is cloudier than 60% of Germany.
Humidity peaks in December at 90% and is lowest in April at 70%.
Zwolle has about 4 days a year above 32°C. Zwolle is cooler than 63% of Germany.
First and last freeze in Zwolle
The first fall freeze in Zwolle typically comes around November 3, and the last spring freeze around April 24. That leaves a frost-free growing season of about 193 days.
Zwolle weather records
These records cover AHAUS during 2006–2026. Earlier records or other stations in the city may differ.
The hottest temperature on record at the Zwolle station is 39°C, on July 25, 2019. The coldest is -17°C, on January 6, 2009.
The wettest day in the available station history brought 151 mm of precipitation, on August 26, 2010.
The best time to visit Zwolle
The most comfortable time to visit is typically May to July and September, when daytime highs sit near 21°C.
Winter (December–February) is chilly, with average highs around 6°C and lows near 1°C.
Spring (March–May) is mild, with average highs around 15°C and lows near 5°C.
Summer (June–August) is warm, with average highs around 23°C and lows near 12°C. It can feel humid.
Autumn (September–November) is mild, with average highs around 15°C and lows near 7°C.
Monthly climate
| Month | Average low | Average high | Precip | Rain days | Humidity | Estimated sunshine | Record high | Record low |
|---|---|---|---|---|---|---|---|---|
| January | 1° | 6° | 76 mm | 18 | 87% | 22% | 16° | -17° |
| February | 1° | 7° | 57 mm | 15 | 83% | 25% | 19° | -16° |
| March | 2° | 10° | 58 mm | 14 | 75% | 36% | 24° | -9° |
| April | 4° | 16° | 30 mm | 11 | 70% | 38% | 28° | -6° |
| May | 8° | 19° | 50 mm | 13 | 72% | 37% | 32° | -1° |
| June | 11° | 22° | 64 mm | 12 | 70% | 40% | 37° | 3° |
| July | 13° | 24° | 76 mm | 15 | 75% | 34% | 39° | 5° |
| August | 12° | 23° | 98 mm | 17 | 75% | 40% | 37° | 4° |
| September | 9° | 19° | 59 mm | 13 | 80% | 38% | 32° | 1° |
| October | 7° | 15° | 65 mm | 15 | 86% | 26% | 28° | -4° |
| November | 4° | 9° | 66 mm | 17 | 88% | 24% | 20° | -7° |
| December | 2° | 6° | 78 mm | 19 | 90% | 16% | 17° | -14° |
Station: AHAUS, 75 km from the city. Temperature normal baseline: 1991–2020, calculated from available NOAA GHCN-Daily observations. Available station history: 2006–2026; 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.
Zwolle climate questions
How much rain does Zwolle get?
Zwolle gets 775 mm of precipitation in an average year, over about 178 rainy days.
What is the wettest month in Zwolle?
August is the wettest month in Zwolle, with 98 mm. April is the driest, with 30 mm.
How many rainy days does Zwolle have a year?
Zwolle has about 178 days with measurable rain in an average year. December has the most, about 19.
What is the hottest month in Zwolle?
July is the warmest month in Zwolle, with an average high of 24°C.
What is the coldest month in Zwolle?
January is the coldest month in Zwolle, with an average low of 1°C.
What is the record high temperature in Zwolle?
Within the available 2006–2026 station history, the record high at the Zwolle station is 39°C, set on July 25, 2019. The record low is -17°C, on January 6, 2009.
What is the sunniest month in Zwolle?
June is the sunniest month in Zwolle, with estimated sunshine of 40% of daylight hours from ERA5 cloud cover. December is the cloudiest.
When is the first frost in Zwolle?
The first fall freeze in Zwolle typically comes around November 3. The last spring freeze is around April 24.
What is the best time to visit Zwolle?
The most comfortable time to visit is typically May to July and September, when daytime highs sit near 21°C.