Average Weather in Thompson Canada
In Thompson, the summers are comfortable and partly cloudy and the winters are frigid, snowy, and overcast. Over the course of the year, the temperature typically varies from -17°F to 75°F and is rarely below -38°F or above 84°F.
Based on the tourism score, the best time of year to visit Thompson for warm-weather activities is from early July to mid August.
The warm season lasts for 3.7 months, from May 22 to September 13, with an average daily high temperature above 60°F. The hottest day of the year is July 24, with an average high of 75°F and low of 51°F.
The cold season lasts for 3.1 months, from November 25 to February 28, with an average daily high temperature below 14°F. The coldest day of the year is January 14, with an average low of -17°F and high of -1°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 Thompson, 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 Thompson begins around April 28 and lasts for 5.4 months, ending around October 9. On July 22, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 57% of the time, and overcast or mostly cloudy 43% of the time.
The cloudier part of the year begins around October 9 and lasts for 6.6 months, ending around April 28. On March 9, the cloudiest day of the year, the sky is overcast or mostly cloudy 82% of the time, and clear, mostly clear, or partly cloudy 18% 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 Thompson varies throughout the year.
The wetter season lasts 5.2 months, from April 30 to October 5, with a greater than 19% chance of a given day being a wet day. The chance of a wet day peaks at 32% on July 18.
The drier season lasts 6.8 months, from October 5 to April 30. The smallest chance of a wet day is 7% on December 29.
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 Thompson changes throughout the year.
Rain alone is the most common for 6.2 months, from April 19 to October 25. The highest chance of a day with rain alone is 32% on July 18.
Snow alone is the most common for 5.8 months, from October 25 to April 19. The highest chance of a day with snow alone is 12% on November 26.
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. Thompson experiences significant seasonal variation in monthly rainfall.
The rainy period of the year lasts for 6.3 months, from April 18 to October 28, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around July 8, with an average total accumulation of 2.8 inches.
The rainless period of the year lasts for 5.7 months, from October 28 to April 18. The least rain falls around January 2, with an average total accumulation of 0.0 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. Thompson experiences some seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 8.3 months, from September 21 to May 30, 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 17, with an average total liquid-equivalent accumulation of 0.6 inches.
The snowless period of the year lasts for 3.7 months, from May 30 to September 21. The least snow falls around July 29, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
The length of the day in Thompson varies extremely over the course of the year. In 2018, the shortest day is December 21, with 7 hours, 0 minutes of daylight; the longest day is June 21, with 17 hours, 34 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 4:46 AM on June 18, and the latest sunrise is 4 hours, 15 minutes later at 9:01 AM on December 29. The earliest sunset is at 3:58 PM on December 14, and the latest sunset is 6 hours, 22 minutes later at 10:20 PM on June 24.
Daylight saving time (DST) is observed in Thompson during 2018, starting in the spring on March 11, lasting 7.8 months, and ending in the fall on November 4.
Sunrise & Sunset with Twilight and Daylight Saving Time
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 Thompson, 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
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
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 Thompson experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 3.0 months, from March 6 to June 8, with average wind speeds of more than 5.3 miles per hour. The windiest day of the year is May 4, with an average hourly wind speed of 5.9 miles per hour.
The calmer time of year lasts for 9.0 months, from June 8 to March 6. The calmest day of the year is July 31, with an average hourly wind speed of 4.8 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Thompson varies throughout the year.
The wind is most often from the north for 3.7 months, from February 10 to May 31; for 1.1 months, from June 9 to July 11; and for 1.7 months, from September 6 to October 28, with a peak percentage of 38% on May 4. The wind is most often from the east for 1.3 weeks, from May 31 to June 9, with a peak percentage of 31% on June 2. The wind is most often from the west for 1.8 months, from July 11 to September 6 and for 3.4 months, from October 28 to February 10, with a peak percentage of 34% on August 5.
Best Time of Year to Visit
To characterize how pleasant the weather is in Thompson 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 Thompson for general outdoor tourist activities is from early July to mid August, with a peak score in the last 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 Thompson for hot-weather activities is from mid July to early August, with a peak score in the last 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.
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 Thompson typically lasts for 2.8 months (86 days), from around June 9 to around September 3, rarely starting before May 24 or after June 26, and rarely ending before August 15 or after September 22.
Time Spent in Various Temperature Bands and 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 Thompson should appear around May 26, only rarely appearing before May 14 or after June 9.
Growing Degree Days
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 May 2 to August 12, with an average daily incident shortwave energy per square meter above 5.0 kWh. The brightest day of the year is June 16, with an average of 6.1 kWh.
The darker period of the year lasts for 4.0 months, from October 18 to February 18, with an average daily incident shortwave energy per square meter below 1.6 kWh. The darkest day of the year is December 17, with an average of 0.5 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Thompson are 55.743 deg latitude, -97.856 deg longitude, and 669 ft elevation.
The topography within 2 miles of Thompson contains only modest variations in elevation, with a maximum elevation change of 118 feet and an average elevation above sea level of 658 feet. Within 10 miles also contains only modest variations in elevation (276 feet). Within 50 miles contains only modest variations in elevation (715 feet).
The area within 2 miles of Thompson is covered by trees (34%), herbaceous vegetation (26%), and sparse vegetation (20%), within 10 miles by trees (72%) and herbaceous vegetation (17%), and within 50 miles by trees (61%) and herbaceous vegetation (21%).
This report illustrates the typical weather in Thompson, 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 is only a single weather station, Thompson Municipal Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Thompson.
At a distance of 6 kilometers from Thompson, closer than our threshold of 150 kilometers, this station is deemed sufficiently nearby to be relied upon as our primary source for temperature and dew point records.
The station records are corrected for the elevation difference between the station and Thompson according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
Please note that the station records themselves may additionally have been back-filled using other nearby stations or the MERRA-2 reanalysis.
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.