Average Weather in Castlegar Canada
In Castlegar, the summers are short, warm, dry, and partly cloudy and the winters are freezing and mostly cloudy. Over the course of the year, the temperature typically varies from 22°F to 85°F and is rarely below 8°F or above 94°F.
Based on the tourism score, the best time of year to visit Castlegar for warm-weather activities is from mid July to mid August.
The hot season lasts for 2.7 months, from June 18 to September 8, with an average daily high temperature above 74°F. The hottest day of the year is August 4, with an average high of 85°F and low of 56°F.
The cold season lasts for 3.5 months, from November 12 to February 26, with an average daily high temperature below 41°F. The coldest day of the year is January 1, with an average low of 22°F and high of 30°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 Castlegar, 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 Castlegar begins around June 11 and lasts for 3.9 months, ending around October 8. On August 3, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 74% of the time, and overcast or mostly cloudy 26% of the time.
The cloudier part of the year begins around October 8 and lasts for 8.1 months, ending around June 11. On January 10, the cloudiest day of the year, the sky is overcast or mostly cloudy 74% of the time, and clear, mostly clear, or partly cloudy 26% of the time.
Cloud Cover Categories
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Castlegar varies throughout the year.
The wetter season lasts 8.5 months, from October 16 to July 1, with a greater than 25% chance of a given day being a wet day. The chance of a wet day peaks at 38% on November 18.
The drier season lasts 3.5 months, from July 1 to October 16. The smallest chance of a wet day is 12% on August 12.
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 Castlegar changes throughout the year.
Rain alone is the most common for 11 months, from January 23 to December 10. The highest chance of a day with rain alone is 34% on June 1.
Snow alone is the most common for 1.4 months, from December 10 to January 23. The highest chance of a day with snow alone is 16% on December 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. Castlegar experiences some seasonal variation in monthly rainfall.
Rain falls throughout the year in Castlegar. The most rain falls during the 31 days centered around June 6, with an average total accumulation of 2.2 inches.
The least rain falls around August 11, with an average total accumulation of 0.7 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. Castlegar experiences some seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 4.9 months, from October 26 to March 23, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around December 28, with an average total liquid-equivalent accumulation of 0.9 inches.
The snowless period of the year lasts for 7.1 months, from March 23 to October 26. The least snow falls around July 24, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
The length of the day in Castlegar varies extremely over the course of the year. In 2017, the shortest day is December 21, with 8 hours, 11 minutes of daylight; the longest day is June 20, with 16 hours, 15 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 4:44 AM on June 16, and the latest sunrise is 3 hours, 2 minutes later at 7:46 AM on December 31. The earliest sunset is at 3:51 PM on December 11, and the latest sunset is 5 hours, 9 minutes later at 9:00 PM on June 25.
Daylight saving time (DST) is observed in Castlegar 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
The perceived humidity level in Castlegar, 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
Average Wind Speed
The predominant average hourly wind direction in Castlegar varies throughout the year.
The wind is most often from the south for 1.3 months, from March 16 to April 25 and for 2.4 months, from September 28 to December 9, with a peak percentage of 43% on November 5. The wind is most often from the west for 5.1 months, from April 25 to September 28, with a peak percentage of 37% on June 13. The wind is most often from the east for 3.2 months, from December 9 to March 16, with a peak percentage of 37% on January 1.
Best Time of Year to Visit
To characterize how pleasant the weather is in Castlegar 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 Castlegar for general outdoor tourist activities is from mid July to mid August, with a peak score in the first week of August.
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 Castlegar for hot-weather activities is from mid July to mid August, with a peak score in the first week of August.
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 Castlegar typically lasts for 5.4 months (164 days), from around April 30 to around October 11, rarely starting before April 7 or after May 20, and rarely ending before September 20 or after November 1.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in Castlegar should appear around May 5, only rarely appearing before April 25 or after May 16.
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 3.3 months, from May 11 to August 20, with an average daily incident shortwave energy per square meter above 5.9 kWh. The brightest day of the year is July 17, with an average of 7.2 kWh.
The darker period of the year lasts for 3.7 months, from October 24 to February 16, with an average daily incident shortwave energy per square meter below 2.2 kWh. The darkest day of the year is December 23, with an average of 0.9 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Castlegar are 49.300 deg latitude, -117.669 deg longitude, and 2,021 ft elevation.
The topography within 2 miles of Castlegar contains large variations in elevation, with a maximum elevation change of 2,989 feet and an average elevation above sea level of 2,201 feet. Within 10 miles contains large variations in elevation (5,787 feet). Within 50 miles also contains extreme variations in elevation (7,927 feet).
The area within 2 miles of Castlegar is covered by trees (46%), shrubs (23%), and sparse vegetation (19%), within 10 miles by trees (82%), and within 50 miles by trees (77%).
This report illustrates the typical weather in Castlegar, 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 Castlegar.
For each station, the records are corrected for the elevation difference between that station and Castlegar 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 Castlegar is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Castlegar and a given station.
The stations contributing to this reconstruction are: West Kootenay Regional Airport (65%, 21 kilometers, south); Nelson Automatic Weather Reporting System (32%, 34 kilometers, northeast); and Kelowna International Airport (3.7%, 143 kilometers, northwest).
Time zones for aiports and weather stations are provided by AskGeo.com .