Oulu, North Ostrobothnia Weather by Month and Climate Averages

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. The sun is out about 19% of daylight hours. 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. The sun is out about 22% of daylight hours. 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. The sun is out about 37% of daylight hours. 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. The sun is out about 42% of daylight hours. 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. The sun is out about 43% of daylight hours. 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. The sun is out about 48% of daylight hours. 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. The sun is out about 34% of daylight hours. 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. The sun is out about 37% of daylight hours. 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. The sun is out about 27% of daylight hours. 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. The sun is out about 23% of daylight hours. 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. The sun is out about 16% of daylight hours. 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. The sun is out about 15% of daylight hours. 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 sunshine about 48% of daylight hours. December is the cloudiest, at 15%. Over the year the sun shines about 30% of daylight hours. 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

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 on record brought 62 mm of rain, 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.

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?

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 sunshine about 48% of daylight hours. 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.