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Average Weather at Fort Severn Airport Canada

At Fort Severn Airport, the summers are cool and mostly cloudy and the winters are frigid, snowy, windy, and overcast. Over the course of the year, the temperature typically varies from -16°F to 65°F and is rarely below -32°F or above 77°F.

Climate Summary

frigidfreezingvery coldcoldcoolcoldfreezingfrigidJanFebMarAprMayJunJulAugSepOctNovDec42%42%8%8%overcastclearprecipitation: 2.9 inprecipitation: 2.9 in0.2 in0.2 inmuggy: 1%muggy: 1%0%0%drydrytourism score: 3.4tourism score: 3.40.00.0
Click on each chart for more information.

Based on the tourism score, the best time of year to visit Fort Severn Airport for warm-weather activities is from mid July to mid August.

Temperature

The warm season lasts for 3.5 months, from June 5 to September 19, with an average daily high temperature above 51°F. The hottest day of the year is July 24, with an average high of 65°F and low of 47°F.

The cold season lasts for 3.2 months, from December 5 to March 13, with an average daily high temperature below 12°F. The coldest day of the year is January 29, with an average low of -16°F and high of -1°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 at Fort Severn AirportJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMfrigidfrigidvery coldvery coldcoldcoolfreezingfreezing
The average hourly temperature, color coded into bands: 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 shaded overlays indicate night and civil twilight.

Labytnangi, Russia (3,859 miles away); Tungor, Russia (4,357 miles); and Uptar, Russia (3,816 miles) are the far-away foreign places with temperatures most similar to Fort Severn Airport (view comparison).

Clouds

At Fort Severn Airport, 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 Fort Severn Airport begins around April 5 and lasts for 7.2 months, ending around November 13. On August 12, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 42% of the time, and overcast or mostly cloudy 58% of the time.

The cloudier part of the year begins around November 13 and lasts for 4.8 months, ending around April 5. On January 10, the cloudiest day of the year, the sky is overcast or mostly cloudy 92% of the time, and clear, mostly clear, or partly cloudy 8% of the time.

Cloud Cover Categories

Cloud Cover Categories at Fort Severn AirportclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Aug 1242%Aug 1242%Jan 108%Jan 108%Apr 525%Apr 525%Nov 1325%Nov 1325%clearmostly clearpartly cloudymostly cloudyovercast
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.

Precipitation

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

The wetter season lasts 5.7 months, from May 5 to October 26, with a greater than 20% chance of a given day being a wet day. The chance of a wet day peaks at 34% on August 27.

The drier season lasts 6.3 months, from October 26 to May 5. The smallest chance of a wet day is 5% on January 28.

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 Fort Severn Airport changes throughout the year.

Rain alone is the most common for 6.3 months, from April 30 to November 7. The highest chance of a day with rain alone is 34% on August 27.

Snow alone is the most common for 5.7 months, from November 7 to April 30. The highest chance of a day with snow alone is 9% on November 24.

Daily Chance of Precipitation

Daily Chance of Precipitation at Fort Severn AirportsnowrainsnowJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Aug 2734%Aug 2734%Jan 285%Jan 285%Apr 3018%Apr 3018%Nov 717%Nov 717%Jan 17%Jan 17%snowrainmixed
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. Fort Severn Airport experiences significant seasonal variation in monthly rainfall.

The rainy period of the year lasts for 6.5 months, from April 27 to November 11, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around August 26, with an average total accumulation of 2.9 inches.

The rainless period of the year lasts for 5.5 months, from November 11 to April 27. The least rain falls around January 3, with an average total accumulation of 0.0 inches.

Average Monthly Rainfall

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. Fort Severn Airport experiences some seasonal variation in monthly liquid-equivalent snowfall.

The snowy period of the year lasts for 7.9 months, from October 10 to June 7, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around April 26, with an average total liquid-equivalent accumulation of 0.5 inches.

The snowless period of the year lasts for 4.1 months, from June 7 to October 10. The least snow falls around August 20, with an average total liquid-equivalent accumulation of 0.0 inches.

Average Liquid-Equivalent Monthly Snowfall

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 Fort Severn Airport varies extremely over the course of the year. In 2017, the shortest day is December 21, with 6 hours, 57 minutes of daylight; the longest day is June 21, with 17 hours, 38 minutes of daylight.

Hours of Daylight and Twilight

Hours of Daylight and Twilight at Fort Severn AirportJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 9 minMar 2012 hr, 9 minMar 2017 hr, 38 minJun 2117 hr, 38 minJun 2112 hr, 12 minSep 2212 hr, 12 minSep 226 hr, 57 minDec 216 hr, 57 minDec 21nightnightday
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 5:03 AM on June 17, and the latest sunrise is 4 hours, 19 minutes later at 9:22 AM on December 28. The earliest sunset is at 4:15 PM on December 14, and the latest sunset is 6 hours, 26 minutes later at 10:41 PM on June 23.

Daylight saving time (DST) is observed at Fort Severn Airport during 2017, starting in the spring on March 12, lasting 7.8 months, and ending in the fall on November 5.

Sunrise & Sunset with Twilight and Daylight Saving Time

Sunrise & Sunset with Twilight and Daylight Saving Time at Fort Severn AirportJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 175:03 AMJun 175:03 AM10:41 PMJun 2310:41 PMJun 23Dec 144:15 PMDec 144:15 PM9:22 AMDec 289:22 AMDec 28Mar 12DSTMar 12DSTDSTNov 5DSTNov 5daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of the year 2017. 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.

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 Fort Severn Airport, 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 at Fort Severn AirportJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Nov 110%Nov 110%Jul 251%Jul 251%drydryhumidhumid
The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.

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 Fort Severn Airport experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 8.0 months, from September 11 to May 12, with average wind speeds of more than 12.6 miles per hour. The windiest day of the year is November 11, with an average hourly wind speed of 15.0 miles per hour.

The calmer time of year lasts for 4.0 months, from May 12 to September 11. The calmest day of the year is July 24, with an average hourly wind speed of 10.2 miles per hour.

Average Wind Speed

Average Wind Speed at Fort Severn AirportwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph2 mph4 mph6 mph8 mph10 mph12 mph14 mph16 mph18 mph20 mph22 mphNov 1115.0 mphNov 1115.0 mphJul 2410.2 mphJul 2410.2 mphSep 1112.6 mphSep 1112.6 mphMay 1212.6 mphMay 1212.6 mph
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 Fort Severn Airport varies throughout the year.

The wind is most often from the north for 4.2 months, from March 27 to August 2, with a peak percentage of 37% on May 26. The wind is most often from the west for 7.8 months, from August 2 to March 27, with a peak percentage of 60% on January 1.

Wind Direction

Wind Direction at Fort Severn AirportWNWJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%westeastnorthsouth
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Water Temperature

Fort Severn Airport is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average water temperature experiences some seasonal variation over the course of the year.

The time of year with warmer water lasts for 1.8 months, from August 7 to October 2, with an average temperature above 42°F. The day of the year with the warmest water is September 1, with an average temperature of 46°F.

The time of year with cooler water lasts for 6.9 months, from November 21 to June 18, with an average temperature below 32°F. The day of the year with the coolest water is February 20, with an average temperature of 29°F.

Average Water Temperature

The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

Best Time of Year to Visit

To characterize how pleasant the weather is at Fort Severn Airport 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 Fort Severn Airport for general outdoor tourist activities is from mid July to mid August, with a peak score in the last week of July.

Tourism Score

Tourism Score at Fort Severn AirportJanFebMarAprMayJunJulAugSepOctNovDec02468103.43.40.00.0 precipitationprecipitationcloudscloudstemperaturetemperaturetourism 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 Fort Severn Airport for hot-weather activities is from mid July to early August, with a peak score in the last week of July.

Beach/Pool Score

Beach/Pool Score at Fort Severn AirportJanFebMarAprMayJunJulAugSepOctNovDec02468100.90.90.00.0 precipitationprecipitationcloudscloudstemperaturetemperature
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 Fort Severn Airport typically lasts for 3.5 months (106 days), from around June 13 to around September 27, rarely starting before May 29 or after June 29, and rarely ending before September 6 or after October 16.

Time Spent in Various Temperature Bands and the Growing Season

Time Spent in Various Temperature Bands and the Growing Season at Fort Severn Airportgrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jun 1350%Jun 1350%Sep 2750%Sep 2750%Jun 2990%Jun 2990%Sep 690%Sep 690%May 2910%May 2910%Oct 1610%Oct 1610%0%Mar 80%Mar 8Aug 7100%Aug 7100%frigidvery coldcoldcoolfreezing
The percentage of time spent in various temperature bands: 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 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 Fort Severn Airport should appear around June 24, only rarely appearing before June 12 or after July 13.

Growing Degree Days

Growing Degree Days at Fort Severn AirportJanFebMarAprMayJunJulAugSepOctNovDec0°F100°F200°F300°F400°F500°F600°F700°FJun 2490°FJun 2490°FDec 31544°FDec 31544°F
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 3.3 months, from April 24 to August 2, with an average daily incident shortwave energy per square meter above 4.9 kWh. The brightest day of the year is June 8, with an average of 6.0 kWh.

The darker period of the year lasts for 4.0 months, from October 15 to February 16, with an average daily incident shortwave energy per square meter below 1.5 kWh. The darkest day of the year is December 20, with an average of 0.4 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy at Fort Severn AirportbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWh9 kWhJun 86.0 kWhJun 86.0 kWhDec 200.4 kWhDec 200.4 kWhApr 244.9 kWhApr 244.9 kWhAug 24.9 kWhAug 24.9 kWhOct 151.5 kWhOct 151.5 kWhFeb 161.5 kWhFeb 161.5 kWh
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 Fort Severn Airport are 56.019 deg latitude, -87.676 deg longitude, and 33 ft elevation.

The topography within 2 miles of Fort Severn Airport is essentially flat, with a maximum elevation change of 52 feet and an average elevation above sea level of 35 feet. Within 10 miles is essentially flat (112 feet). Within 50 miles also contains only modest variations in elevation (440 feet).

The area within 2 miles of Fort Severn Airport is covered by herbaceous vegetation (59%) and trees (36%), within 10 miles by herbaceous vegetation (41%) and trees (37%), and within 50 miles by trees (40%) and water (36%).

Data Sources

This report illustrates the typical weather at Fort Severn Airport, 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

Fort Severn Airport 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.

There are no other weather stations in our network within 200 kilometers of this location. Consequently, in the case of missing or erroneous measurements from this station, we fall back on NASA's MERRA-2 modern-era reanalysis , adjusted according to typical seasonal and diurnal differences between this station and the wide-area MERRA-2 reconstructed values.

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , 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 aiports 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.