Average Weather in Iisalmi Finland
In Iisalmi, 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 70°F and is rarely below -15°F or above 78°F.
Based on the tourism score, the best time of year to visit Iisalmi for warm-weather activities is from late June to mid August.
The warm season lasts for 3.1 months, from May 28 to September 1, with an average daily high temperature above 60°F. The hottest day of the year is July 23, with an average high of 70°F and low of 54°F.
The cold season lasts for 3.6 months, from November 25 to March 13, with an average daily high temperature below 30°F. The coldest day of the year is February 3, with an average low of 8°F and high of 20°F.
Average High and Low Temperature
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 Iisalmi, 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 Iisalmi begins around April 16 and lasts for 5.2 months, ending around September 21. On July 19, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 53% of the time, and overcast or mostly cloudy 47% of the time.
The cloudier part of the year begins around September 21 and lasts for 6.8 months, ending around April 16. On December 16, the cloudiest day of the year, the sky is overcast or mostly cloudy 85% of the time, and clear, mostly clear, or partly cloudy 15% of the time.
Cloud Cover Categories
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 Iisalmi varies throughout the year.
The wetter season lasts 6.8 months, from May 11 to December 4, with a greater than 29% chance of a given day being a wet day. The chance of a wet day peaks at 40% on July 28.
The drier season lasts 5.2 months, from December 4 to May 11. The smallest chance of a wet day is 17% on February 24.
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 Iisalmi changes throughout the year.
Rain alone is the most common for 8.3 months, from March 23 to November 30. The highest chance of a day with rain alone is 40% on July 28.
Snow alone is the most common for 3.7 months, from November 30 to March 23. The highest chance of a day with snow alone is 17% on January 23.
Daily Chance of Precipitation
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. Iisalmi experiences significant seasonal variation in monthly rainfall.
The rainy period of the year lasts for 9.1 months, from March 19 to December 22, 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 2.9 months, from December 22 to March 19. The least rain falls around January 30, with an average total accumulation of 0.2 inches.
Average Monthly Rainfall
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. Iisalmi experiences some seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 6.7 months, from October 13 to May 3, 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 0.9 inches.
The snowless period of the year lasts for 5.3 months, from May 3 to October 13. The least snow falls around August 2, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
The length of the day in Iisalmi varies extremely over the course of the year. In 2021, the shortest day is December 21, with 4 hours, 26 minutes of daylight; the longest day is June 21, with 20 hours, 41 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 2:52 AM on June 20, and the latest sunrise is 7 hours, 5 minutes later at 9:57 AM on December 25. The earliest sunset is at 2:21 PM on December 18, and the latest sunset is 9 hours, 12 minutes later at 11:33 PM on June 22.
Daylight saving time (DST) is observed in Iisalmi 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
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 perceived humidity level in Iisalmi, 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
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Iisalmi experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 7.0 months, from October 17 to May 17, with average wind speeds of more than 5.5 miles per hour. The windiest day of the year is January 25, with an average hourly wind speed of 6.4 miles per hour.
The calmer time of year lasts for 5.0 months, from May 17 to October 17. The calmest day of the year is July 30, with an average hourly wind speed of 4.5 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Iisalmi varies throughout the year.
The wind is most often from the west for 3.3 weeks, from May 21 to June 13, with a peak percentage of 30% on June 4. The wind is most often from the south for 11 months, from June 13 to May 21, with a peak percentage of 37% on January 1.
Best Time of Year to Visit
To characterize how pleasant the weather is in Iisalmi 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 Iisalmi for general outdoor tourist activities is from late June to mid August, with a peak score in the third week of July.
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 Iisalmi for hot-weather activities is from mid to late July, with a peak score in the third week of July.
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.
The growing season in Iisalmi typically lasts for 4.6 months (142 days), from around May 15 to around October 3, rarely starting before April 28 or after June 1, and rarely ending before September 12 or after October 23.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in Iisalmi should appear around May 28, only rarely appearing before May 17 or after June 9.
Growing Degree Days
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 2.9 months, from May 10 to August 7, with an average daily incident shortwave energy per square meter above 4.7 kWh. The brightest day of the year is June 28, with an average of 5.9 kWh.
The darker period of the year lasts for 4.9 months, from October 6 to March 1, 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
For the purposes of this report, the geographical coordinates of Iisalmi are 63.559 deg latitude, 27.191 deg longitude, and 308 ft elevation.
The topography within 2 miles of Iisalmi contains only modest variations in elevation, with a maximum elevation change of 184 feet and an average elevation above sea level of 302 feet. Within 10 miles also contains only modest variations in elevation (486 feet). Within 50 miles contains only modest variations in elevation (948 feet).
The area within 2 miles of Iisalmi is covered by water (41%), artificial surfaces (38%), and trees (15%), within 10 miles by trees (64%) and cropland (21%), and within 50 miles by trees (77%) and water (11%).
This report illustrates the typical weather in Iisalmi, 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 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Iisalmi.
For each station, the records are corrected for the elevation difference between that station and Iisalmi 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 Iisalmi is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Iisalmi and a given station.
Time zones for airports and weather stations are provided by AskGeo.com .