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Average Weather at Sioux Lookout Airport Canada

At Sioux Lookout Airport, the summers are long, comfortable, and partly cloudy and the winters are frigid, snowy, and overcast. Over the course of the year, the temperature typically varies from -7°F to 76°F and is rarely below -28°F or above 85°F.

The warm season lasts for 3.9 months, from May 18 to September 16, with an average daily high temperature above 63°F. The hottest day of the year is July 24, with an average high of 76°F and low of 58°F.

The cold season lasts for 3.0 months, from November 28 to February 28, with an average daily high temperature below 24°F. The coldest day of the year is January 15, with an average low of -7°F and high of 11°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 Sioux Lookout Airport12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDecfrigidfreezingchillycoldcoolcomfortable
The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < chilly < 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.

Clouds

At Sioux Lookout 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 Sioux Lookout Airport begins around April 12 and lasts for 6.2 months, ending around October 17. On August 1, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 66% of the time, and overcast or mostly cloudy 34% of the time.

The cloudier part of the year begins around October 17 and lasts for 5.8 months, ending around April 12. On February 12, the cloudiest day of the year, the sky is overcast or mostly cloudy 81% of the time, and clear, mostly clear, or partly cloudy 19% of the time.

Cloud Cover

Cloud Cover at Sioux Lookout Airportclearercloudiercloudier0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecFeb 1281%Feb 1281%Aug 134%Aug 134%Apr 1258%Apr 1258%Oct 1758%Oct 1758%overcastmostly cloudypartly cloudymostly clearclear
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 Sioux Lookout Airport varies throughout the year.

The wetter season lasts 5.5 months, from May 1 to October 18, with a greater than 24% chance of a given day being a wet day. The chance of a wet day peaks at 39% on June 21.

The drier season lasts 6.5 months, from October 18 to May 1. The smallest chance of a wet day is 10% on February 18.

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 Sioux Lookout Airport changes throughout the year.

Rain alone is the most common for 7.4 months, from March 28 to November 9. The highest chance of a day with rain alone is 39% on June 21.

Snow alone is the most common for 4.6 months, from November 9 to March 28. The highest chance of a day with snow alone is 14% on January 14.

Daily Chance of Precipitation

Daily Chance of Precipitation at Sioux Lookout Airportsnowrainsnow0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecJun 2139%Jun 2139%Feb 1810%Feb 1810%Mar 2814%Mar 2814%Nov 919%Nov 919%Jan 113%Jan 113%May 125%May 125%snowmixedrain
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. Sioux Lookout Airport experiences significant seasonal variation in monthly rainfall.

The rainy period of the year lasts for 7.8 months, from March 27 to November 21, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around June 26, with an average total accumulation of 3.8 inches.

The rainless period of the year lasts for 4.2 months, from November 21 to March 27. The least rain falls around January 20, 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. Sioux Lookout Airport experiences some seasonal variation in monthly liquid-equivalent snowfall.

The snowy period of the year lasts for 7.5 months, from October 3 to May 19, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around November 25, with an average total liquid-equivalent accumulation of 0.7 inches.

The snowless period of the year lasts for 4.5 months, from May 19 to October 3. The least snow falls around July 19, 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 Sioux Lookout Airport varies extremely over the course of the year. In 2017, the shortest day is December 21, with 8 hours, 3 minutes of daylight; the longest day is June 21, with 16 hours, 24 minutes of daylight.

Hours of Daylight and Twilight

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 4:57 AM on June 16, and the latest sunrise is 3 hours, 9 minutes later at 8:06 AM on December 31. The earliest sunset is at 4:05 PM on December 11, and the latest sunset is 5 hours, 16 minutes later at 9:21 PM on June 25.

Daylight saving time (DST) is observed at Sioux Lookout 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 Sioux Lookout Airport12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDecJun 164:57 AMJun 164:57 AM9:21 PMJun 259:21 PMJun 25Dec 114:05 PMDec 114:05 PM8:06 AMDec 318:06 AMDec 31Mar 12DSTMar 12DSTDSTNov 5DSTNov 5daynightnightnightnight
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 Sioux Lookout 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, staying within 3% of 3% throughout.

Humidity Comfort Levels

Humidity Comfort Levels at Sioux Lookout Airport0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecNov 170%Nov 170%Jul 267%Jul 267%muggymuggycomfortablecomfortabledrydry
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 Sioux Lookout Airport does not vary significantly over the course of the year, remaining within 0.3 miles per hour of 3.1 miles per hour throughout.

Average Wind Speed

Average Wind Speed at Sioux Lookout Airport0.0 mph0.5 mph1.0 mph1.5 mph2.0 mph2.5 mph3.0 mph3.5 mph4.0 mph4.5 mph5.0 mphJanFebMarAprMayJunJulAugSepOctNovDecApr 263.3 mphApr 263.3 mphJul 282.8 mphJul 282.8 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 Sioux Lookout Airport varies throughout the year.

The wind is most often from the north for 2.7 months, from March 7 to May 30, with a peak percentage of 32% on April 12. The wind is most often from the south for 1.7 weeks, from May 30 to June 11 and for 3.9 weeks, from August 21 to September 17, with a peak percentage of 36% on August 27. The wind is most often from the west for 2.3 months, from June 11 to August 21 and for 5.7 months, from September 17 to March 7, with a peak percentage of 40% on July 31.

Wind Direction

Wind Direction at Sioux Lookout AirportWNSWSW0%20%40%60%80%100%JanFebMarAprMayJunJulAugSepOctNovDecwestsoutheastnorth
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).

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 3.9 months, from April 26 to August 22, with an average daily incident shortwave energy per square meter above 5.3 kWh. The brightest day of the year is June 26, with an average of 6.5 kWh.

The darker period of the year lasts for 3.7 months, from October 23 to February 15, with an average daily incident shortwave energy per square meter below 2.0 kWh. The darkest day of the year is December 20, with an average of 0.8 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy at Sioux Lookout Airportbrightdarkdark0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWh9 kWhJanFebMarAprMayJunJulAugSepOctNovDecJun 266.5 kWhJun 266.5 kWhDec 200.8 kWhDec 200.8 kWhApr 265.3 kWhApr 265.3 kWhAug 225.3 kWhAug 225.3 kWhOct 232.0 kWhOct 232.0 kWhFeb 152.0 kWhFeb 152.0 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 Sioux Lookout Airport are 50.114 deg latitude, -91.905 deg longitude, and 1,227 ft elevation.

The topography within 2 miles of Sioux Lookout Airport contains only modest variations in elevation, with a maximum elevation change of 226 feet and an average elevation above sea level of 1,241 feet. Within 10 miles also contains only modest variations in elevation (299 feet). Within 50 miles contains only modest variations in elevation (581 feet).

The area within 2 miles of Sioux Lookout Airport is covered by trees (71%), within 10 miles by trees (67%) and water (24%), and within 50 miles by trees (80%) and water (15%).

Data Sources

This report illustrates the typical weather at Sioux Lookout 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

Sioux Lookout 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.

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 Dryden Regional Airport; Red Lake Airport; Upsala, Ont.; Rawson Lake; and Pickle Lake 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 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.