The best times to visit Koszalin for ideal weather are

May 21st to September 23rd

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

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Weather in Koszalin


Average temperatures in Koszalin vary greatly. 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 28th 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 Koszalin, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally early to mid August where highs are regularly around 74.7°F (23.7°C) with temperatures rarely dropping below 58.6°F (14.8°C) at night.

Koszalin Temperatures (Fahrenheit)


Koszalin 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.

Koszalin Perceived Temperature (F)


Koszalin Perceived Temperature (C)



Average Koszalin 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 36.3 32.4 28.4
Feb 37.6 32.8 28.5
Mar 45.9 38.9 32.6
Apr 55.8 46.9 38.8
May 63 54.2 45.3
Jun 68 59.7 51.3
Jul 73 64.8 56.7
Aug 72.8 64.4 56.8
Sep 64.4 56.9 50.1
Oct 54.6 48.1 42.4
Nov 46.1 41.8 37.7
Dec 38.4 34.6 30.4

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 2.4 0.2 -2
Feb 3.1 0.4 -1.9
Mar 7.7 3.8 0.3
Apr 13.2 8.3 3.8
May 17.2 12.3 7.4
Jun 20 15.4 10.7
Jul 22.8 18.2 13.7
Aug 22.7 18 13.8
Sep 18 13.8 10.1
Oct 12.6 8.9 5.8
Nov 7.8 5.4 3.2
Dec 3.6 1.4 -0.9


Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Koszalin are April, February, and then March. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around mid April. For example, on the week of April 16th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in early to mid August with an average of 3 days of significant precipitation the week of August 6th.

When can you find snow in Koszalin? Weather stations report large amounts of snow likely to be deepest around February, especially close to early to mid February. The best time to ski (if at all) in Koszalin is often around around December 17th 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.

Chanceof Precipitation

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

Days with precipitation

Snow on the Ground

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

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 24% 2.8 2.3
Feb 15% 4.7 1.4
Mar 18% 2.3 1.5
Apr 14% 1.1 1.4
May 22% 0 2
Jun 24% 0 3.4
Jul 30% 0 3.7
Aug 28% 0 3.6
Sep 27% 0 3
Oct 23% 0 2.2
Nov 23% 2.1 2.4
Dec 22% 3.8 2.4

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 24 7.1 5.8
Feb 15 11.9 3.6
Mar 18 5.8 3.8
Apr 14 2.8 3.6
May 22 0 5.1
Jun 24 0 8.6
Jul 30 0 9.4
Aug 28 0 9.1
Sep 27 0 7.6
Oct 23 0 5.6
Nov 23 5.3 6.1
Dec 22 9.7 6.1


Humidity and Wind

Koszalin has some extremely humid months, and above average humidity throughout the year. The least humid month is April (63.3% relative humidity), and the most humid month is December (83.4%).

Wind in Koszalin is usually calm. The windiest month is January, followed by March and December. January’s average wind speed of around 7.8 knots (9 MPH or 14.4 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 early to mid January where average top sustained speeds reach 12.9 knots, which is considered a moderate breeze.

Relative Humidity (%)

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

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 7.8 Gentle breeze 11.2 Significant breeze
Feb 7.1 Gentle breeze 10.3 Gentle breeze
Mar 7.3 Gentle breeze 11.3 Significant breeze
Apr 6.7 Light breeze 10.8 Gentle breeze
May 6.1 Light breeze 10 Significant breeze
Jun 6.1 Light breeze 10.1 Gentle breeze
Jul 6 Light breeze 10 Significant breeze
Aug 5.7 Light breeze 9.5 Gentle breeze
Sep 5.9 Light breeze 9.4 Significant breeze
Oct 6 Light breeze 9.1 Gentle breeze
Nov 7 Gentle breeze 10.3 Significant breeze
Dec 7.3 Gentle breeze 10.3 Gentle breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 80.3%
Feb 78.2%
Mar 70.4%
Apr 63.3%
May 65.2%
Jun 68%
Jul 69%
Aug 68.5%
Sep 73.5%
Oct 77.2%
Nov 83.3%
Dec 83.4%


Is it Safe to Travel to Koszalin?

Our best data indicates this area is generally safe. As of Dec 14, 2018 there are no travel advisories or warnings for Poland; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories


The Busiest and Least Crowded Months

The busiest month for tourism in Koszalin, Poland is May, followed by August and February. 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 Koszalin in November. 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 extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 52.4 in November means 52.4% of the tourists vs. May.

Overall Koszalin Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 66.8°F (19.3°C) and 42.8°F (6°C) with warmer temperatures in the later months. Rain is somewhat common with 4 to 7 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 the most precipitation with 7 to 9 days of precipitation per month. June – August is the busiest season for tourism in Koszalin, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 66.5°F (19.2°C) and 41.2°F (5.1°C), which will feel chilly given the humidity and wind. It rains or snows a significant amount: 7 to 8 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 Koszalin to be enjoyable for warm weather travelers. The average high during this season is between 42.8°F (6°C) and 31.9°F (-0.1°C). On average, it rains or snows a fair amount: 4 to 8 times per month. These times of year are fairly slow with tourists.


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