Pietarsaari Temperature by Month

The average annual maximum temperature in Pietarsaari, Western Finland, Finland is 8°C (46°F), with daytime highs ranging from -2°C (28°F) in February to 21°C (70°F) in July. This page covers monthly averages, day-night differences, and how Pietarsaari compares to cities worldwide.

Depending on the time of the year, temperatures range from pleasant to very cold in Pietarsaari. Nighttime lows follow the same pattern, ranging from 13°C (55°F) to -9°C (16°F).

The chart below illustrates the average maximum day and minimum night temperatures in Pietarsaari by month:

The coldest point of the day usually falls between 4 AM and 6 AM, with temperatures peaking around 3 PM.

The chart below shows the average temperature throughout the year:

Pietarsaari's average annual maximum temperature is 8°C (46°F). To put that in context, here's how it compares to a few well-known destinations:

Lisbon, Portugal averages 21°C (70°F) annually, warm summers, mild winters, and rain mainly in the cooler months.

Toronto, Canada averages 13°C (55°F) annually, with cold snowy winters balanced by genuinely warm summers.

Chicago, USA averages 15°C (59°F) annually, known for extreme seasonal swings, from bitterly cold winters to warm summers.

Adelaide, Australia averages 21°C (70°F) a year, with warm summers, mild winters, and relatively low rainfall year-round.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained, so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.

For more on Pietarsaari's weather, including monthly rainfall, sunshine hours, and humidity, visit our Pietarsaari climate page.