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Average Weather in Suomussalmi Finland

In Suomussalmi, the summers are cool and partly cloudy and the winters are frigid, snowy, and overcast. Over the course of the year, the temperature typically varies from 4°F to 68°F and is rarely below -21°F or above 77°F.

Based on the tourism score, the best time of year to visit Suomussalmi for warm-weather activities is from late June to early August.

Climate Summary

freezingvery coldcoldcoolcoolcoldvery coldfreezingJanFebMarAprMayJunJulAugSepOctNovDecNowNow51%51%13%13%overcastclearprecipitation: 3.2 inprecipitation: 3.2 in0.7 in0.7 inmuggy: 1%muggy: 1%0%0%drydrytourism score: 5.6tourism score: 5.60.00.0
Click on each chart for more information.

Temperature

The warm season lasts for 3.0 months, from May 30 to August 31, with an average daily high temperature above 57°F. The hottest day of the year is July 21, with an average high of 68°F and low of 51°F.

The cold season lasts for 3.7 months, from November 21 to March 11, with an average daily high temperature below 27°F. The coldest day of the year is February 3, with an average low of 4°F and high of 17°F.

Average High and Low Temperature

The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

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

Average Hourly Temperature in SuomussalmiJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowfrigidfreezingfreezingvery coldcoldcoolcoolvery coldfrigidcomfortable
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
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Dillingham, Alaska, United States (3,870 miles away); Y, Alaska, United States (3,662 miles); and Maliotenam, Canada (3,307 miles) are the far-away foreign places with temperatures most similar to Suomussalmi (view comparison).

Clouds

In Suomussalmi, 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 Suomussalmi begins around April 22 and lasts for 4.8 months, ending around September 16. On July 2, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 51% of the time, and overcast or mostly cloudy 49% of the time.

The cloudier part of the year begins around September 16 and lasts for 7.2 months, ending around April 22. On January 22, the cloudiest day of the year, the sky is overcast or mostly cloudy 87% of the time, and clear, mostly clear, or partly cloudy 13% of the time.

Cloud Cover Categories

Cloud Cover Categories in SuomussalmiclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jul 251%Jul 251%Jan 2213%Jan 2213%Apr 2232%Apr 2232%Sep 1632%Sep 1632%NowNowclearmostly clearpartly cloudymostly cloudyovercast
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Suomussalmi varies throughout the year.

The wetter season lasts 5.5 months, from May 8 to October 23, with a greater than 29% chance of a given day being a wet day. The chance of a wet day peaks at 42% on July 9.

The drier season lasts 6.5 months, from October 23 to May 8. The smallest chance of a wet day is 16% on March 3.

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 Suomussalmi changes throughout the year.

Rain alone is the most common for 7.3 months, from April 5 to November 12. The highest chance of a day with rain alone is 41% on July 9.

Snow alone is the most common for 4.7 months, from November 12 to April 5. The highest chance of a day with snow alone is 17% on January 23.

Daily Chance of Precipitation

Daily Chance of Precipitation in SuomussalmisnowrainsnowJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jul 942%Jul 942%Mar 316%Mar 316%Apr 520%Apr 520%Nov 1226%Nov 1226%Jan 120%Jan 120%May 829%May 829%NowNowsnowrain
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

Rainfall

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. Suomussalmi experiences significant seasonal variation in monthly rainfall.

The rainy period of the year lasts for 7.7 months, from April 4 to November 25, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around July 20, with an average total accumulation of 3.2 inches.

The rainless period of the year lasts for 4.3 months, from November 25 to April 4. The least rain falls around January 27, with an average total accumulation of 0.1 inches.

Average Monthly Rainfall

Average Monthly Rainfall in SuomussalmirainJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 inJul 203.2 inJul 203.2 inJan 270.1 inJan 270.1 inApr 40.5 inApr 40.5 inNov 250.5 inNov 250.5 inNowNow
The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average liquid-equivalent snowfall.

Snowfall

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. Suomussalmi experiences some seasonal variation in monthly liquid-equivalent snowfall.

The snowy period of the year lasts for 7.2 months, from October 3 to May 10, 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 16, with an average total liquid-equivalent accumulation of 0.8 inches.

The snowless period of the year lasts for 4.8 months, from May 10 to October 3. The least snow falls around July 31, with an average total liquid-equivalent accumulation of 0.0 inches.

Average Liquid-Equivalent Monthly Snowfall

Average Liquid-Equivalent Monthly Snowfall in SuomussalmisnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0.0 in0.0 in0.5 in0.5 in1.0 in1.0 in1.5 in1.5 in2.0 in2.0 in2.5 in2.5 in3.0 in3.0 in3.5 in3.5 inJan 160.8 inJan 160.8 inJul 310.0 inJul 310.0 inOct 30.1 inOct 30.1 inMay 100.1 inMay 100.1 in
The average liquid-equivalent snowfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average rainfall.

Sun

The length of the day in Suomussalmi varies extremely over the course of the year. In 2021, the shortest day is December 21, with 3 hours, 40 minutes of daylight; the longest day is June 21, with 21 hours, 54 minutes of daylight.

Hours of Daylight and Twilight

Hours of Daylight and Twilight in SuomussalmiJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 9 minMar 2012 hr, 9 minMar 2021 hr, 54 minJun 2121 hr, 54 minJun 2112 hr, 18 minSep 2212 hr, 18 minSep 223 hr, 40 minDec 213 hr, 40 minDec 21nightnightdayNowNow
The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise is at 2:09 AM on June 20, and the latest sunrise is 8 hours, 4 minutes later at 10:13 AM on December 24. The earliest sunset is at 1:51 PM on December 18, and the latest sunset is 10 hours, 11 minutes later at 12:03 AM on June 21.

Daylight saving time (DST) is observed in Suomussalmi 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

Sunrise & Sunset with Twilight and Daylight Saving Time in SuomussalmiJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 202:09 AMJun 202:09 AM12:03 AMJun 2112:03 AMJun 21Dec 181:51 PMDec 181:51 PM10:13 AMDec 2410:13 AMDec 24Mar 28DSTMar 28DSTDSTOct 31DSTOct 31daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of the year 2021. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. The transitions to and from daylight saving time are indicated by the 'DST' labels.

Moon

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

The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.

Humidity

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 Suomussalmi, 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, remaining a virtually constant 0% throughout.

Humidity Comfort Levels

Humidity Comfort Levels in SuomussalmiJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Mar 230%Mar 230%Jul 271%Jul 271%drydry
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.

Wind

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 Suomussalmi experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 6.0 months, from October 27 to April 26, with average wind speeds of more than 5.5 miles per hour. The windiest day of the year is January 24, with an average hourly wind speed of 6.7 miles per hour.

The calmer time of year lasts for 6.0 months, from April 26 to October 27. The calmest day of the year is July 30, with an average hourly wind speed of 4.3 miles per hour.

Average Wind Speed

Average Wind Speed in SuomussalmiwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph1 mph1 mph2 mph2 mph3 mph3 mph4 mph4 mph5 mph5 mph6 mph6 mph7 mph7 mph8 mph8 mph9 mph9 mph10 mph10 mphJan 246.7 mphJan 246.7 mphJul 304.3 mphJul 304.3 mphOct 275.5 mphOct 275.5 mphApr 265.5 mphApr 265.5 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The predominant average hourly wind direction in Suomussalmi varies throughout the year.

The wind is most often from the west for 1.7 months, from May 8 to June 29 and for 5.0 days, from August 24 to August 29, with a peak percentage of 31% on June 4. The wind is most often from the south for 1.8 months, from June 29 to August 24 and for 8.3 months, from August 29 to May 8, with a peak percentage of 31% on July 25.

Wind Direction

Wind Direction in SuomussalmiSWSSJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwestsoutheastnorth
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Best Time of Year to Visit

To characterize how pleasant the weather is in Suomussalmi 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 Suomussalmi for general outdoor tourist activities is from late June to early August, with a peak score in the third week of July.

Tourism Score

Tourism Score in SuomussalmiJanFebMarAprMayJunJulAugSepOctNovDec002244668810105.65.60.00.0NowNowprecipitationprecipitationcloudscloudstemperaturetemperature tourism score
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

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 Suomussalmi for hot-weather activities is from mid to late July, with a peak score in the third week of July.

Beach/Pool Score

Beach/Pool Score in SuomussalmiJanFebMarAprMayJunJulAugSepOctNovDec002244668810101.81.80.00.0NowNowprecipitationprecipitationcloudsclouds
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Methodology

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.

Growing Season

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 Suomussalmi typically lasts for 3.5 months (109 days), from around May 24 to around September 10, rarely starting before May 7 or after June 12, and rarely ending before August 19 or after October 1.

Time Spent in Various Temperature Bands and the Growing Season

Time Spent in Various Temperature Bands and the Growing Season in Suomussalmigrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%May 2450%May 2450%Sep 1050%Sep 1050%Jun 1290%Jun 1290%Aug 1990%Aug 1990%May 710%May 710%Oct 110%Oct 110%0%Nov 270%Nov 27Jul 11100%Jul 11100%NowNowfrigidfreezingcoldcoolvery cold
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
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

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 Suomussalmi should appear around June 3, only rarely appearing before May 22 or after June 19.

Growing Degree Days

Growing Degree Days in SuomussalmiJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F200°F200°F400°F400°F600°F600°F800°F800°F1,000°F1,000°FJun 390°FJun 390°FDec 31848°FDec 31848°FNowNow
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

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 2.7 months, from May 15 to August 5, with an average daily incident shortwave energy per square meter above 4.6 kWh. The brightest day of the year is June 23, with an average of 5.7 kWh.

The darker period of the year lasts for 5.0 months, from October 3 to March 3, with an average daily incident shortwave energy per square meter below 1.2 kWh. The darkest day of the year is December 21, with an average of 0.0 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy in SuomussalmibrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhJun 235.7 kWhJun 235.7 kWhDec 210.0 kWhDec 210.0 kWhMay 154.6 kWhMay 154.6 kWhAug 54.6 kWhAug 54.6 kWhOct 31.2 kWhOct 31.2 kWhMar 31.2 kWhMar 31.2 kWhNowNow
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of Suomussalmi are 64.887 deg latitude, 28.908 deg longitude, and 656 ft elevation.

The topography within 2 miles of Suomussalmi contains only modest variations in elevation, with a maximum elevation change of 226 feet and an average elevation above sea level of 662 feet. Within 10 miles also contains only modest variations in elevation (463 feet). Within 50 miles contains only modest variations in elevation (928 feet).

The area within 2 miles of Suomussalmi is covered by water (44%), trees (41%), and artificial surfaces (15%), within 10 miles by trees (78%) and water (16%), and within 50 miles by trees (83%).

Data Sources

This report illustrates the typical weather in Suomussalmi, 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 Suomussalmi.

For each station, the records are corrected for the elevation difference between that station and Suomussalmi 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 Suomussalmi is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Suomussalmi and a given station.

The stations contributing to this reconstruction are: Suomussalmi (98%, 5.4 kilometers, east) and Kajaani Airport (1.7%, 89 kilometers, southwest).

Other Data

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.

Disclaimer

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.