Climate and Average Weather Year Round in Kerimäki Finland
In Kerimäki, the summers are comfortable and partly cloudy and the winters are freezing, snowy, and overcast. Over the course of the year, the temperature typically varies from 8°F to 71°F and is rarely below -16°F or above 80°F.
Based on the tourism score, the best time of year to visit Kerimäki for warm-weather activities is from late June to mid August.
Climate in Kerimäki
Average Temperature in Kerimäki
The warm season lasts for 3.1 months, from May 27 to September 1, with an average daily high temperature above 61°F. The hottest day of the year is July 22, with an average high of 71°F and low of 54°F.
The cold season lasts for 3.6 months, from November 24 to March 13, with an average daily high temperature below 31°F. The coldest day of the year is February 4, with an average low of 8°F and high of 21°F.
Average High and Low Temperature in Kerimäki
The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.
Average Hourly Temperature in Kerimäki
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
In Kerimäki, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.
The clearer part of the year in Kerimäki begins around April 16 and lasts for 5.4 months, ending around September 30. On July 19, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 56% of the time, and overcast or mostly cloudy 44% of the time.
The cloudier part of the year begins around September 30 and lasts for 6.6 months, ending around April 16. On December 16, the cloudiest day of the year, the sky is overcast or mostly cloudy 84% of the time, and clear, mostly clear, or partly cloudy 16% of the time.
Cloud Cover Categories in Kerimäki
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Kerimäki varies throughout the year.
The wetter season lasts 7.1 months, from May 13 to December 16, with a greater than 28% chance of a given day being a wet day. The chance of a wet day peaks at 38% on August 2.
The drier season lasts 4.9 months, from December 16 to May 13. The smallest chance of a wet day is 16% on March 4.
Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation in Kerimäki changes throughout the year.
Rain alone is the most common for 8.2 months, from March 22 to November 28. The highest chance of a day with rain alone is 38% on August 2.
Snow alone is the most common for 3.7 months, from November 28 to March 22. The highest chance of a day with snow alone is 17% on December 31.
Daily Chance of Precipitation in Kerimäki
To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Kerimäki experiences significant seasonal variation in monthly rainfall.
The rainy period of the year lasts for 8.7 months, from March 25 to December 14, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around August 8, with an average total accumulation of 3.3 inches.
The rainless period of the year lasts for 3.3 months, from December 14 to March 25. The least rain falls around January 30, with an average total accumulation of 0.2 inches.
Average Monthly Rainfall in Kerimäki
We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. Colder, drier snow tends to be on the higher end of that range and warmer, wetter snow on the lower end.
As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Kerimäki experiences some seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 6.8 months, from October 11 to May 6, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around January 11, with an average total liquid-equivalent accumulation of 0.9 inches.
The snowless period of the year lasts for 5.2 months, from May 6 to October 11. The least snow falls around August 2, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall in Kerimäki
The length of the day in Kerimäki varies extremely over the course of the year. In 2021, the shortest day is December 21, with 5 hours, 11 minutes of daylight; the longest day is June 21, with 19 hours, 42 minutes of daylight.
Hours of Daylight and Twilight in Kerimäki
The earliest sunrise is at 3:13 AM on June 19, and the latest sunrise is 6 hours, 13 minutes later at 9:26 AM on December 26. The earliest sunset is at 2:35 PM on December 17, and the latest sunset is 8 hours, 20 minutes later at 10:55 PM on June 22.
Daylight saving time (DST) is observed in Kerimäki during 2021, starting in the spring on March 28, lasting 7.1 months, and ending in the fall on October 31.
Sunrise & Sunset with Twilight and Daylight Saving Time in Kerimäki
The figure below presents a compact representation of key lunar data for 2021. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases.
Moon Rise, Set & Phases in Kerimäki
We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.
The perceived humidity level in Kerimäki, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, staying within 1% of 1% throughout.
Humidity Comfort Levels in Kerimäki
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.
The average hourly wind speed in Kerimäki experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 3.1 months, from February 24 to May 27, with average wind speeds of more than 7.4 miles per hour. The windiest day of the year is April 5, with an average hourly wind speed of 8.2 miles per hour.
The calmer time of year lasts for 8.9 months, from May 27 to February 24. The calmest day of the year is July 25, with an average hourly wind speed of 6.5 miles per hour.
Average Wind Speed in Kerimäki
The predominant average hourly wind direction in Kerimäki varies throughout the year.
The wind is most often from the west for 1.1 weeks, from May 29 to June 6, with a peak percentage of 29% on June 4. The wind is most often from the south for 12 months, from June 6 to May 29, with a peak percentage of 33% on January 1.
Wind Direction in Kerimäki
Best Time of Year to Visit
To characterize how pleasant the weather is in Kerimäki throughout the year, we compute two travel scores.
The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best time of year to visit Kerimäki for general outdoor tourist activities is from late June to mid August, with a peak score in the third week of July.
Tourism Score in Kerimäki
The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Kerimäki for hot-weather activities is from mid to late July, with a peak score in the third week of July.
Beach/Pool Score in Kerimäki
For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.
Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.
Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.
Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.
Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.
Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).
The growing season in Kerimäki typically lasts for 4.2 months (129 days), from around May 22 to around September 27, rarely starting before May 4 or after June 10, and rarely ending before September 6 or after October 20.
Time Spent in Various Temperature Bands and the Growing Season in Kerimäki
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.
Based on growing degree days alone, the first spring blooms in Kerimäki should appear around May 23, only rarely appearing before May 13 or after June 3.
Growing Degree Days in Kerimäki
This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.
The average daily incident shortwave solar energy experiences extreme seasonal variation over the course of the year.
The brighter period of the year lasts for 3.0 months, from May 7 to August 9, with an average daily incident shortwave energy per square meter above 4.8 kWh. The brightest day of the year is June 29, with an average of 6.0 kWh.
The darker period of the year lasts for 4.6 months, from October 9 to February 27, with an average daily incident shortwave energy per square meter below 1.3 kWh. The darkest day of the year is December 21, with an average of 0.1 kWh.
Average Daily Incident Shortwave Solar Energy in Kerimäki
For the purposes of this report, the geographical coordinates of Kerimäki are 61.911 deg latitude, 29.282 deg longitude, and 262 ft elevation.
The topography within 2 miles of Kerimäki contains only modest variations in elevation, with a maximum elevation change of 112 feet and an average elevation above sea level of 275 feet. Within 10 miles also contains only modest variations in elevation (249 feet). Within 50 miles contains only modest variations in elevation (659 feet).
The area within 2 miles of Kerimäki is covered by trees (41%), water (37%), artificial surfaces (11%), and cropland (11%), within 10 miles by trees (54%) and water (41%), and within 50 miles by trees (71%) and water (23%).
This report illustrates the typical weather in Kerimäki, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Temperature and Dew Point
There are 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Kerimäki.
For each station, the records are corrected for the elevation difference between that station and Kerimäki according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
The estimated value at Kerimäki is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Kerimäki and a given station.
All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus.
All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.
Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.
Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.
Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .
Time zones for airports and weather stations are provided by AskGeo.com .
Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.
The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.
We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.
We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.