Oulu Weather in May
In Oulu, May brings moderate daytime temperatures around 13°C (55°F), with nights cooling to 4°C (39°F). Some rainfall is to be expected.
Rainfall in Oulu in May
Analyzing past climate data, one can expect approximately 11 days of rain, averaging 53 mm (2.1 in). Expect a fairly normal spread of rainfall this month, with no particular pattern of very heavy or very persistent showers.
Temperature in Oulu in May
Daytime temperatures in Oulu reach 13°C (55°F) in May, dropping to 4°C (39°F) at night. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. With lows around 4°C (39°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.
Sunshine in Oulu in May
The days are predominantly sunny, with an estimated total of around 272 hours of sunshine. Despite the cool temperatures, these sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.
Wind Speed in Oulu in May
Average wind speeds reach 3 m/s (6 knots) in May, creating light breezes that feel pleasant throughout the day. Some days are calmer, while others bring slightly more active breezes.
Average water temperature in May
The water temperature is only 5°C (41°F) this month — cold enough that most people will want to stay out. Hardy swimmers may manage a quick dip, but it won't be comfortable.If your ideal day consists of dry skies and pleasant temperatures, July typically offers the best circumstances for Oulu.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Finland, check out our Oulu's climate page.
Oulu Temperature in May
Min Temperature
4°C (39°F)
Max Temperature
13°C (55°F)
Water Temperature
5°C (41°F)
Chance of Rain
37%
Precipitation
53 mm (2.1 in)
Rainy days
11 days
Humidity
67%
Windspeed
3 m/s (6 knots)
Sunshine
272 hours
Percentage Sunshine
45%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Oulu typically rise from around 9°C (48°F) at the start of May to approximately 15°C (59°F) by the end. Nights are cold, with lows typically ranging from 0°C (32°F) to 7°C (45°F).
Average temperatures in May
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather for Oulu in May
Browse day-by-day weather records for Oulu spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Oulu historical weather extremes in May
The extremes listed below come from historical weather data collected in Oulu from 1976 through 2026.
- The warmest day in May was on May 30, 2013, with a maximum of 29°C (84°F).
- On May 3, 2019, Oulu saw its coldest May day with temperatures maxing out at 0°C (32°F).
- The lowest overnight temperature recorded in May was -9°C (16°F) (May 1, 1976).
Best Places in Finland in May
Find out more about the weather in Finland and which places have the best travel conditions in this month. See all of Finland in May →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Oulu in May
Pack for changing conditions in Oulu in May. Bring a mix of short and long sleeves, a warm layer like a hoodie or light jacket, and comfortable pants. The key is being able to add or remove layers as the days goes by. Rain gear is recommended, you can expect wet weather on multiple days. Expect water temperatures of around 5°C (41°F), which is definitely too cold for comfortable swimming. Your luggage space is better used for other items. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Oulu in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Finland, check out our Oulu's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Oulu climate overview or explore weather in Finland.
