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Oulu, North Ostrobothnia Weather by Month and Climate Averages
Monthly normals · Rain · Snow
Sunshine · Freeze dates · Records · Best time to visit
What is the weather like in Oulu, North Ostrobothnia?
Oulu, North Ostrobothnia gets 589 mm of precipitation a year over about 163 rainy days. July is the warmest month (average high 21°C) and January the coldest (average low -12°C).
Humid continental climate
Oulu, North Ostrobothnia has mild summers and cold winters. Daytime highs range from about -5°C in January to 21°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 19°C.
| Season | Months | Avg low | Avg high |
|---|---|---|---|
| Winter | Dec–Feb | -11° | -4° |
| Spring | Mar–May | -3° | 7° |
| Summer | Jun–Aug | 10° | 19° |
| Autumn | Sep–Nov | 1° | 7° |
How much rain does Oulu get?
Oulu gets 589 mm of precipitation in an average year, spread over about 163 days with measurable rain. That is fewer rainy days than 60% of Finland.
July is the wettest month, with 88 mm. April is the driest, with 23 mm. December has the most rainy days, about 17.
The longest dry spell in the last five years lasted 21 days, to April 21, 2023.
Oulu weather by month
Oulu weather in January
In January, Oulu averages a high of -6°C and a low of -12°C. It gets 33 mm of precipitation over about 15 rainy days. Estimated sunshine is 19% of daylight hours, derived from ERA5 cloud cover. The January record high is 7°C (2020) and the record low is -33°C (2010).
Oulu weather in February
In February, Oulu averages a high of -4°C and a low of -11°C. It gets 34 mm of precipitation over about 13 rainy days. Estimated sunshine is 22% of daylight hours, derived from ERA5 cloud cover. The February record high is 6°C (2015) and the record low is -34°C (2011).
Oulu weather in March
In March, Oulu averages a high of 1°C and a low of -8°C. It gets 29 mm of precipitation over about 12 rainy days. Estimated sunshine is 37% of daylight hours, derived from ERA5 cloud cover. The March record high is 12°C (2016) and the record low is -29°C (2021).
Oulu weather in April
In April, Oulu averages a high of 6°C and a low of -3°C. It gets 23 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 19°C (2008) and the record low is -18°C (2023).
Oulu weather in May
In May, Oulu averages a high of 14°C and a low of 3°C. It gets 39 mm of precipitation over about 12 rainy days. Estimated sunshine is 43% of daylight hours, derived from ERA5 cloud cover. The May record high is 30°C (2014) and the record low is -7°C (2024).
Oulu weather in June
In June, Oulu averages a high of 18°C and a low of 8°C. It gets 62 mm of precipitation over about 13 rainy days. Estimated sunshine is 48% of daylight hours, derived from ERA5 cloud cover. The June record high is 32°C (2019) and the record low is -1°C (2009). June is one of the most comfortable months to visit.
Oulu weather in July
In July, Oulu averages a high of 21°C and a low of 11°C. It gets 88 mm of precipitation over about 13 rainy days. Estimated sunshine is 34% of daylight hours, derived from ERA5 cloud cover. The July record high is 33°C (2018) and the record low is 3°C (2017).
Oulu weather in August
In August, Oulu averages a high of 19°C and a low of 10°C. It gets 69 mm of precipitation over about 13 rainy days. Estimated sunshine is 37% of daylight hours, derived from ERA5 cloud cover. The August record high is 31°C (2018) and the record low is -1°C (2020). August is one of the most comfortable months to visit.
Oulu weather in September
In September, Oulu averages a high of 14°C and a low of 6°C. It gets 55 mm of precipitation over about 14 rainy days. Estimated sunshine is 27% of daylight hours, derived from ERA5 cloud cover. The September record high is 26°C (2019) and the record low is -6°C (2018).
Oulu weather in October
In October, Oulu averages a high of 6°C and a low of 1°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 October record high is 21°C (2018) and the record low is -13°C (2023).
Oulu weather in November
In November, Oulu averages a high of 2°C and a low of -3°C. It gets 50 mm of precipitation over about 16 rainy days. Estimated sunshine is 16% of daylight hours, derived from ERA5 cloud cover. The November record high is 11°C (2015) and the record low is -23°C (2010).
Oulu weather in December
In December, Oulu averages a high of -2°C and a low of -8°C. It gets 47 mm of precipitation over about 17 rainy days. Estimated sunshine is 15% of daylight hours, derived from ERA5 cloud cover. The December record high is 8°C (2013) and the record low is -30°C (2010).
Sunshine, humidity and wind in Oulu
June is the sunniest month in Oulu, with estimated sunshine of 48% of daylight hours from ERA5 cloud cover. December is the cloudiest, at 15%. The annual cloud-cover estimate is 30% of daylight hours; it is not a measurement of sunshine duration. Oulu is sunnier than 73% of Finland.
Humidity peaks in November at 91% and is lowest in June at 65%.
First and last freeze in Oulu
The first fall freeze in Oulu typically comes around September 20, and the last spring freeze around May 23. That leaves a frost-free growing season of about 120 days.
Oulu weather records
These records cover OULUNSALO PELLONPAA during 2008–2024. Earlier records or other stations in the city may differ.
The hottest temperature on record at the Oulu station is 33°C, on July 30, 2018. The coldest is -34°C, on February 16, 2011.
The wettest day in the available station history brought 62 mm of precipitation, on July 12, 2011.
The best time to visit Oulu
The most comfortable time to visit is typically June and August, when daytime highs sit near 19°C.
Winter (December–February) is cold, with average highs around -4°C and lows near -10°C.
Spring (March–May) is chilly, with average highs around 7°C and lows near -3°C.
Summer (June–August) is mild, with average highs around 20°C and lows near 10°C. It can feel humid.
Autumn (September–November) is chilly, with average highs around 7°C and lows near 1°C.
Monthly climate
| Month | Average low | Average high | Precip | Rain days | Humidity | Estimated sunshine | Record high | Record low |
|---|---|---|---|---|---|---|---|---|
| January | -12° | -6° | 33 mm | 15 | 88% | 19% | 7° | -33° |
| February | -11° | -4° | 34 mm | 13 | 87% | 22% | 6° | -34° |
| March | -8° | 1° | 29 mm | 12 | 80% | 37% | 12° | -29° |
| April | -3° | 6° | 23 mm | 10 | 76% | 42% | 19° | -18° |
| May | 3° | 14° | 39 mm | 12 | 66% | 43% | 30° | -7° |
| June | 8° | 18° | 62 mm | 13 | 65% | 48% | 32° | -1° |
| July | 11° | 21° | 88 mm | 13 | 76% | 34% | 33° | 3° |
| August | 10° | 19° | 69 mm | 13 | 79% | 37% | 31° | -1° |
| September | 6° | 14° | 55 mm | 14 | 84% | 27% | 26° | -6° |
| October | 1° | 6° | 60 mm | 15 | 90% | 23% | 21° | -13° |
| November | -3° | 2° | 50 mm | 16 | 91% | 16% | 11° | -23° |
| December | -8° | -2° | 47 mm | 17 | 90% | 15% | 8° | -30° |
Station: OULUNSALO PELLONPAA, 9 km from the city. Temperature normal baseline: 1991–2020, calculated from available NOAA GHCN-Daily observations. Available station history: 2008–2024; 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.
Oulu climate questions
How much rain does Oulu get?
Oulu gets 589 mm of precipitation in an average year, over about 163 rainy days.
What is the wettest month in Oulu?
July is the wettest month in Oulu, with 88 mm. April is the driest, with 23 mm.
How many rainy days does Oulu have a year?
Oulu has about 163 days with measurable rain in an average year. December has the most, about 17.
What is the hottest month in Oulu?
July is the warmest month in Oulu, with an average high of 21°C.
What is the coldest month in Oulu?
January is the coldest month in Oulu, with an average low of -12°C.
What is the record high temperature in Oulu?
Within the available 2008–2024 station history, the record high at the Oulu station is 33°C, set on July 30, 2018. The record low is -34°C, on February 16, 2011.
What is the sunniest month in Oulu?
June is the sunniest month in Oulu, with estimated sunshine of 48% of daylight hours from ERA5 cloud cover. December is the cloudiest.
When is the first frost in Oulu?
The first fall freeze in Oulu typically comes around September 20. The last spring freeze is around May 23.
What is the best time to visit Oulu?
The most comfortable time to visit is typically June and August, when daytime highs sit near 19°C.