The best times to visit Porvoo for ideal weather are

May 28th to September 9th

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.



Other Porvoo Travel Info

Weather in Porvoo


Average temperatures in Porvoo vary drastically. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a chance of rain or snow throughout most of the year. The area is less temperate than some — in the 23rd percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Porvoo, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally late July where highs are regularly around 76.9°F (24.9°C) with temperatures rarely dropping below 57.3°F (14.1°C) at night.

Porvoo Temperatures (Fahrenheit)


Porvoo Temperatures (Celsius)


“Feels-Like” Temperatures

The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

Porvoo Perceived Temperature (F)


Porvoo Perceived Temperature (C)



Average Porvoo Temperatures by Month

Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 26.8 21.7 16
Feb 28.3 23.4 17.9
Mar 36.4 29.7 22.5
Apr 48.6 40.4 31.9
May 61.4 52.1 42.3
Jun 67.3 58.6 49.6
Jul 74.3 65.5 55.9
Aug 70.2 61.7 52.6
Sep 60.7 53.4 46.1
Oct 48.4 42.5 36.1
Nov 40.7 36.8 32.4
Dec 32.6 28.2 23.1

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan -2.9 -5.7 -8.9
Feb -2.1 -4.8 -7.8
Mar 2.4 -1.3 -5.3
Apr 9.2 4.7 -0.1
May 16.3 11.2 5.7
Jun 19.6 14.8 9.8
Jul 23.5 18.6 13.3
Aug 21.2 16.5 11.4
Sep 15.9 11.9 7.8
Oct 9.1 5.8 2.3
Nov 4.8 2.7 0.2
Dec 0.3 -2.1 -4.9



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Porvoo are April, March, and then May. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early to mid February. For example, on the week of February 12th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in mid December with an average of 3 days of significant precipitation the week of December 17th.

When can you find snow in Porvoo? Weather stations report very large amounts of snow likely to be deepest around March, especially close to early March. The best time to ski (if at all) in Porvoo is often around around March 12th when fresh powder is deepest. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

Chance of Precipitation

The graph below shows the % chance of rainy and snowy days in Porvoo.

Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Porvoo (in).

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 36% 8.4 3
Feb 23% 10.4 2.1
Mar 18% 12.5 1.7
Apr 17% 6 1.7
May 18% 2 1.9
Jun 29% 0 3
Jul 19% 0 2.3
Aug 26% 0 3.5
Sep 30% 0 3
Oct 26% 0 2.9
Nov 33% 5.4 3.6
Dec 44% 8.6 3.5

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 36 21.3 7.6
Feb 23 26.4 5.3
Mar 18 31.8 4.3
Apr 17 15.2 4.3
May 18 5.1 4.8
Jun 29 0 7.6
Jul 19 0 5.8
Aug 26 0 8.9
Sep 30 0 7.6
Oct 26 0 7.4
Nov 33 13.7 9.1
Dec 44 21.8 8.9


Humidity and Wind

Porvoo has some extremely humid months, with other comfortably humid months. The least humid month is May (56.3% relative humidity), and the most humid month is November (87.7%).

Wind in Porvoo is usually calm. The windiest month is December, followed by March and May. December’s average wind speed of around 7.3 knots (8.4 MPH or 13.6 KPH) is considered “a gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in late May to early June where average top sustained speeds reach 11.8 knots, which is considered a moderate breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Porvoo.

Avg. Relative Humidity


The graph below shows wind speed (max and average) in knots.

Max Sustained Wind
Average Daily Wind

Average Wind Speeds

Show Wind Speeds

All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.

Month Avg. Wind Avg. Wind Feel Sustained High Wind High Wind Feel
Jan 6.7 Light breeze 9.7 Gentle breeze
Feb 6.3 Light breeze 9.4 Gentle breeze
Mar 6.9 Light breeze 10.6 Gentle breeze
Apr 6.3 Light breeze 10.5 Gentle breeze
May 6.7 Light breeze 11.3 Gentle breeze
Jun 6.4 Light breeze 10.6 Gentle breeze
Jul 6 Light breeze 10.2 Gentle breeze
Aug 5.5 Light breeze 9.6 Gentle breeze
Sep 6 Light breeze 9.5 Gentle breeze
Oct 6.4 Light breeze 10.1 Gentle breeze
Nov 6.6 Light breeze 10 Gentle breeze
Dec 7.3 Gentle breeze 11.1 Significant breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 85%
Feb 83.3%
Mar 70.5%
Apr 61.5%
May 56.3%
Jun 61.7%
Jul 63.3%
Aug 70.2%
Sep 78.7%
Oct 80.5%
Nov 87.7%
Dec 85.7%


Is it Safe to Travel to Porvoo?

Our best data indicates this area is generally safe. As of Oct 07, 2019 there are no travel advisories or warnings for Finland; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Aug 22, 2019.


The Busiest and Least Crowded Months

The busiest month for tourism in Porvoo, Finland is July, followed by June and January. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Porvoo in December. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month


Most Popular Months to Visit

Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is somewhat extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 50.6 in December means 50.6% of the tourists vs. July.



Overall Porvoo Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 66.1°F (18.9°C) and 33.2°F (0.7°C) with far warmer temperatures in the later months. Rain is somewhat common with 5 to 6 days of significant precipitation per month. Spring is the second busiest for tourism, which makes it a good time for those looking for things to do.

Summer (June through August)

The middle-year months have comfortably cool weather with high temperatures that are comfortable. These months see moderate precipitation with 6 to 9 days of precipitation per month. June – August is the busiest season for tourism in Porvoo, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 64.2°F (17.9°C) and 36.1°F (2.3°C), which will feel chilly given the humidity and wind. It rains or snows a significant amount: 8 to 10 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.

Winter (December through February)

Weather is far too cold this time of year in Porvoo to be enjoyable for warm weather travelers. The average high during this season is between 35.1°F (1.7°C) and 24.1°F (-4.4°C). On average, it rains or snows a great amount: 6 to 14 times per month. These times of year are fairly slow with tourists.


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