Booking 70 days in advance of your planned departure date is, on average, the best time to get cheap flights from Helsinki to Oulu. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
When flying from Helsinki to Oulu, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
The most flights from HEL to OUL are scheduled on a Thursday (23 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (4 on average).
In terms of precipitation, rainfall in Oulu ranges from 10.0 - 60.0 inches per month. August is typically the wettest month, when rainfall can reach 60.0 mm. April is typically the driest time to visit Oulu when rainfall is around 10.0 mm.
If weather is an important factor for your trip to Oulu, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 16.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -10.0 C).
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