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Climate and Average Weather Year Round at Suomussalmi Finland

At 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 at Suomussalmi

freezingvery coldcoldcoolcoolcoldfreezingJanFebMarAprMayJunJulAugSepOctNovDecNowNow51%51%13%13%overcastclearprecipitation: 3.2 inprecipitation: 3.2 in0.7 in0.7 inmuggy: 1%muggy: 1%0%0%drydrytourism score: 5.5tourism score: 5.50.00.0
Suomussalmi weather by month. Click on each chart for more information.

Average Temperature at Suomussalmi

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 22, 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 at Suomussalmi

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 at Suomussalmi

Average Hourly Temperature at 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 (3,869 miles away); Y, Alaska, United States (3,662 miles); and Maliotenam, Canada (3,309 miles) are the far-away foreign places with temperatures most similar to Suomussalmi (view comparison).

Compare Suomussalmi to another city:

Clouds

At 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 at 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 at Suomussalmi

Cloud Cover Categories at 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 at Suomussalmi varies throughout the year.

The wetter season lasts 5.5 months, from May 7 to October 24, with a greater than 28% chance of a given day being a wet day. The chance of a wet day peaks at 41% on July 9.

The drier season lasts 6.5 months, from October 24 to May 7. The smallest chance of a wet day is 15% 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 at Suomussalmi changes throughout the year.

Rain alone is the most common for 7.2 months, from April 6 to November 10. The highest chance of a day with rain alone is 41% on July 9.

Snow alone is the most common for 4.8 months, from November 10 to April 6. The highest chance of a day with snow alone is 17% on January 23.

Daily Chance of Precipitation at Suomussalmi

Daily Chance of Precipitation at SuomussalmisnowrainsnowJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jul 941%Jul 941%Mar 415%Mar 415%Apr 620%Apr 620%Nov 1026%Nov 1026%Jan 120%Jan 120%May 728%May 728%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 7.6 months, from April 5 to November 24, 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 4.4 months, from November 24 to April 5. The least rain falls around January 26, with an average total accumulation of 0.1 inches.

Average Monthly Rainfall at Suomussalmi

Average Monthly Rainfall at SuomussalmirainJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 in6 in6 inJul 203.2 inJul 203.2 inJan 260.1 inJan 260.1 inApr 50.5 inApr 50.5 inNov 240.5 inNov 240.5 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 7.3 months, from October 2 to May 11, 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 4.7 months, from May 11 to October 2. The least snow falls around July 22, with an average total liquid-equivalent accumulation of 0.0 inches.

Average Liquid-Equivalent Monthly Snowfall at Suomussalmi

Average Liquid-Equivalent Monthly Snowfall at 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 220.0 inJul 220.0 inDec 50.8 inDec 50.8 inOct 20.1 inOct 20.1 inMay 110.1 inMay 110.1 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 at Suomussalmi varies extremely over the course of the year. In 2021, the shortest day is December 21, with 3 hours, 39 minutes of daylight; the longest day is June 21, with 21 hours, 55 minutes of daylight.

Hours of Daylight and Twilight at Suomussalmi

Hours of Daylight and Twilight at SuomussalmiJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 9 minMar 2012 hr, 9 minMar 2021 hr, 55 minJun 2121 hr, 55 minJun 2112 hr, 18 minSep 2212 hr, 18 minSep 223 hr, 39 minDec 213 hr, 39 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 2:08 AM on June 20, and the latest sunrise is 8 hours, 5 minutes later at 10:13 AM on December 24. The earliest sunset is at 1:50 PM on December 18, and the latest sunset is 10 hours, 12 minutes later at 12:03 AM on June 21.

Daylight saving time (DST) is observed at 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 at Suomussalmi

Sunrise & Sunset with Twilight and Daylight Saving Time at SuomussalmiJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 202:08 AMJun 202:08 AM12:03 AMJun 2112:03 AMJun 21Dec 181:50 PMDec 181:50 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 at Suomussalmi

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 at 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 at Suomussalmi

Humidity Comfort Levels at 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%NowNowdrydry
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 at 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 at Suomussalmi

Average Wind Speed at 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 at Suomussalmi varies throughout the year.

The wind is most often from the west for 1.7 months, from May 7 to June 29; for 1.4 weeks, from August 3 to August 13; and for 6.0 days, from August 23 to August 29, with a peak percentage of 31% on June 4. The wind is most often from the south for 1.2 months, from June 29 to August 3; for 1.0 weeks, from August 13 to August 20; for 3.0 days, from August 20 to August 23; and for 8.3 months, from August 29 to May 7, with a peak percentage of 31% on July 25.

Wind Direction at Suomussalmi

Wind Direction at 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 at 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 at Suomussalmi

Tourism Score at SuomussalmiJanFebMarAprMayJunJulAugSepOctNovDec002244668810105.55.50.00.0NowNowprecipitationprecipitationcloudscloudstemperaturetemperature 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 at Suomussalmi

Beach/Pool Score at 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 at Suomussalmi typically lasts for 3.5 months (108 days), from around May 25 to around September 10, rarely starting before May 7 or after June 13, and rarely ending before August 19 or after October 1.

Time Spent in Various Temperature Bands and the Growing Season at Suomussalmi

Time Spent in Various Temperature Bands and the Growing Season at Suomussalmigrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%May 2550%May 2550%Sep 1050%Sep 1050%Jun 1390%Jun 1390%Aug 1990%Aug 1990%May 710%May 710%Oct 110%Oct 110%0%Nov 270%Nov 27Jul 11100%Jul 11100%NowNowfrigidfreezingvery coldcoldcool
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 at Suomussalmi should appear around June 3, only rarely appearing before May 22 or after June 19.

Growing Degree Days at Suomussalmi

Growing Degree Days at SuomussalmiJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F200°F200°F400°F400°F600°F600°F800°F800°F1,000°F1,000°FJun 390°FJun 390°FDec 31838°FDec 31838°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 at Suomussalmi

Average Daily Incident Shortwave Solar Energy at 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 64.900 deg latitude, 29.017 deg longitude, and 722 ft elevation.

The topography within 2 miles of Suomussalmi contains only modest variations in elevation, with a maximum elevation change of 220 feet and an average elevation above sea level of 703 feet. Within 10 miles also contains only modest variations in elevation (384 feet). Within 50 miles contains only modest variations in elevation (935 feet).

The area within 2 miles of Suomussalmi is covered by trees (67%) and water (29%), within 10 miles by trees (78%) and water (17%), and within 50 miles by trees (83%).

Data Sources

This report illustrates the typical weather at 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

Suomussalmi has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required.

In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations.

The stations on which we may fall back are Kuusamo Airport, Kajaani Airport, and Oulu Airport.

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.