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Västerås, Västmanland Weather by Month and Climate Averages
Monthly normals · Rain · Snow
Sunshine · Freeze dates · Records · Best time to visit
What is the weather like in Västerås, Västmanland?
Västerås, Västmanland gets 576 mm of precipitation a year over about 148 rainy days. July is the warmest month (average high 23°C) and January the coldest (average low -5°C).
Humid continental climate
Västerås, Västmanland has warm summers and cold winters. Daytime highs range from about 0°C in January to 23°C in July. July is usually the wettest month. The most comfortable time to visit is typically June and August, when daytime highs sit near 21°C.
| Season | Months | Avg low | Avg high |
|---|---|---|---|
| Winter | Dec–Feb | -4° | 1° |
| Spring | Mar–May | 1° | 11° |
| Summer | Jun–Aug | 12° | 22° |
| Autumn | Sep–Nov | 4° | 11° |
How much rain does Västerås get?
Västerås gets 576 mm of precipitation in an average year, spread over about 148 days with measurable rain. That is fewer rainy days than 81% of Sweden.
July is the wettest month, with 72 mm. March is the driest, with 27 mm. November has the most rainy days, about 15.
The longest dry spell in the last five years lasted 31 days, to June 17, 2023.
From October 2025 to September 2026 Västerås got 423 mm of rain, against a normal of 576 mm for those months. June 2026 had the most, with 60 mm.
Västerås weather by month
Västerås weather in January
In January, Västerås averages a high of 0°C and a low of -5°C. It gets 37 mm of precipitation over about 13 rainy days. Estimated sunshine is 23% of daylight hours, derived from ERA5 cloud cover. The January record high is 10°C (1983) and the record low is -28°C (1987).
Västerås weather in February
In February, Västerås averages a high of 1°C and a low of -5°C. It gets 31 mm of precipitation over about 11 rainy days. Estimated sunshine is 31% of daylight hours, derived from ERA5 cloud cover. The February record high is 12°C (2021) and the record low is -32°C (1979).
Västerås weather in March
In March, Västerås averages a high of 5°C and a low of -3°C. It gets 27 mm of precipitation over about 11 rainy days. Estimated sunshine is 38% of daylight hours, derived from ERA5 cloud cover. The March record high is 19°C (2017) and the record low is -21°C (2005).
Västerås weather in April
In April, Västerås averages a high of 11°C and a low of 1°C. It gets 31 mm of precipitation over about 10 rainy days. Estimated sunshine is 42% of daylight hours, derived from ERA5 cloud cover. The April record high is 26°C (1993) and the record low is -10°C (1985).
Västerås weather in May
In May, Västerås averages a high of 17°C and a low of 6°C. It gets 41 mm of precipitation over about 11 rainy days. Estimated sunshine is 44% of daylight hours, derived from ERA5 cloud cover. The May record high is 29°C (1989) and the record low is -4°C (1978).
Västerås weather in June
In June, Västerås averages a high of 20°C and a low of 10°C. It gets 62 mm of precipitation over about 13 rainy days. Estimated sunshine is 49% of daylight hours, derived from ERA5 cloud cover. The June record high is 32°C (1970) and the record low is 1°C (1997). June is one of the most comfortable months to visit.
Västerås weather in July
In July, Västerås averages a high of 23°C and a low of 13°C. It gets 72 mm of precipitation over about 12 rainy days. Estimated sunshine is 39% of daylight hours, derived from ERA5 cloud cover. The July record high is 34°C (2022) and the record low is 4°C (1996).
Västerås weather in August
In August, Västerås averages a high of 22°C and a low of 12°C. It gets 72 mm of precipitation over about 14 rainy days. Estimated sunshine is 35% of daylight hours, derived from ERA5 cloud cover. The August record high is 35°C (1975) and the record low is 2°C (1984). August is one of the most comfortable months to visit.
Västerås weather in September
In September, Västerås averages a high of 16°C and a low of 8°C. It gets 45 mm of precipitation over about 11 rainy days. Estimated sunshine is 32% of daylight hours, derived from ERA5 cloud cover. The September record high is 28°C (2024) and the record low is -7°C (2001).
Västerås weather in October
In October, Västerås averages a high of 10°C and a low of 4°C. It gets 56 mm of precipitation over about 13 rainy days. Estimated sunshine is 29% of daylight hours, derived from ERA5 cloud cover. The October record high is 21°C (1995) and the record low is -11°C (1992).
Västerås weather in November
In November, Västerås averages a high of 5°C and a low of 1°C. It gets 53 mm of precipitation over about 15 rainy days. Estimated sunshine is 21% of daylight hours, derived from ERA5 cloud cover. The November record high is 16°C (2020) and the record low is -17°C (1980).
Västerås weather in December
In December, Västerås averages a high of 2°C and a low of -3°C. It gets 48 mm of precipitation over about 15 rainy days. Estimated sunshine is 21% of daylight hours, derived from ERA5 cloud cover. The December record high is 12°C (2015) and the record low is -27°C (2001).
Sunshine, humidity and wind in Västerås
June is the sunniest month in Västerås, with estimated sunshine of 49% of daylight hours from ERA5 cloud cover. November is the cloudiest, at 21%. The annual cloud-cover estimate is 34% of daylight hours; it is not a measurement of sunshine duration. Västerås is sunnier than 77% of Sweden.
Humidity peaks in December at 89% and is lowest in May at 57%.
First and last freeze in Västerås
The first fall freeze in Västerås typically comes around October 4, and the last spring freeze around May 8. That leaves a frost-free growing season of about 149 days.
Västerås weather records
These records cover VASTERAS-HASSLO during 1970–2026. Earlier records or other stations in the city may differ.
The hottest temperature on record at the Västerås station is 35°C, on August 7, 1975. The coldest is -32°C, on February 16, 1979.
The wettest day in the available station history brought 92 mm of precipitation, on July 21, 1984.
41 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 Västerås
The most comfortable time to visit is typically June and August, when daytime highs sit near 21°C.
Winter (December–February) is cold, with average highs around 1°C and lows near -4°C.
Spring (March–May) is chilly, with average highs around 11°C and lows near 1°C.
Summer (June–August) is warm, with average highs around 22°C and lows near 12°C.
Autumn (September–November) is chilly, with average highs around 10°C and lows near 4°C.
Monthly climate
| Month | Average low | Average high | Precip | Rain days | Humidity | Estimated sunshine | Record high | Record low |
|---|---|---|---|---|---|---|---|---|
| January | -5° | 0° | 37 mm | 13 | 85% | 23% | 10° | -28° |
| February | -5° | 1° | 31 mm | 11 | 81% | 31% | 12° | -32° |
| March | -3° | 5° | 27 mm | 11 | 70% | 38% | 19° | -21° |
| April | 1° | 11° | 31 mm | 10 | 61% | 42% | 26° | -10° |
| May | 6° | 17° | 41 mm | 11 | 57% | 44% | 29° | -4° |
| June | 10° | 20° | 62 mm | 13 | 58% | 49% | 32° | 1° |
| July | 13° | 23° | 72 mm | 12 | 69% | 39% | 34° | 4° |
| August | 12° | 22° | 72 mm | 14 | 72% | 35% | 35° | 2° |
| September | 8° | 16° | 45 mm | 11 | 79% | 32% | 28° | -7° |
| October | 4° | 10° | 56 mm | 13 | 84% | 29% | 21° | -11° |
| November | 1° | 5° | 53 mm | 15 | 87% | 21% | 16° | -17° |
| December | -3° | 2° | 48 mm | 15 | 89% | 21% | 12° | -27° |
Station: VASTERAS-HASSLO, 5 km from the city. Temperature normal baseline: 1991–2020, calculated from available NOAA GHCN-Daily observations. Available station history: 1970–2026; 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.
Västerås climate questions
How much rain does Västerås get?
Västerås gets 576 mm of precipitation in an average year, over about 148 rainy days.
What is the wettest month in Västerås?
July is the wettest month in Västerås, with 72 mm. March is the driest, with 27 mm.
How many rainy days does Västerås have a year?
Västerås has about 148 days with measurable rain in an average year. November has the most, about 15.
What is the hottest month in Västerås?
July is the warmest month in Västerås, with an average high of 23°C.
What is the coldest month in Västerås?
January is the coldest month in Västerås, with an average low of -5°C.
What is the record high temperature in Västerås?
Within the available 1970–2026 station history, the record high at the Västerås station is 35°C, set on August 7, 1975. The record low is -32°C, on February 16, 1979.
What is the sunniest month in Västerås?
June is the sunniest month in Västerås, with estimated sunshine of 49% of daylight hours from ERA5 cloud cover. November is the cloudiest.
When is the first frost in Västerås?
The first fall freeze in Västerås typically comes around October 4. The last spring freeze is around May 8.
What is the best time to visit Västerås?
The most comfortable time to visit is typically June and August, when daytime highs sit near 21°C.