Air Guitar World Championship Finland
This is something you might want to add to your bucket list. August is also the perfect time to visit Finland. The days are long and the temperature is amazing.
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.
If your ideal day consists of dry skies and pleasant temperatures, July typically offers the best circumstances for Oulu.
Pick a month to see the average temperature, rainfall and sunshine in Oulu - and find the best time to visit.
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).
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
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.
The extremes listed below come from historical weather data collected in Oulu from 1976 through 2026.
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 is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
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.
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Oulu climate overview or explore weather in Finland.
Where to go in May - average daytime high across popular destinations.
Need travel inspiration? Check out our bucket list articles and be inspired.
Air Guitar World Championship Finland
This is something you might want to add to your bucket list. August is also the perfect time to visit Finland. The days are long and the temperature is amazing.
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