Climate and Average Weather Year Round at Trail Valley , N. W. T. Canada

At Trail Valley , N. W. T., the summers are cool; the winters are long, frigid, and snowy; and it is mostly cloudy year round. Over the course of the year, the temperature typically varies from -21°F to 66°F and is rarely below -40°F or above 78°F.

Based on the tourism score, the best time of year to visit Trail Valley , N. W. T. for warm-weather activities is from late June to late July.

The warm season lasts for 3.2 months, from May 30 to September 5, with an average daily high temperature above 51°F. The hottest month of the year at Trail Valley , N. W. T. is July, with an average high of 65°F and low of 47°F.

The cold season lasts for 4.7 months, from November 9 to March 31, with an average daily high temperature below 6°F. The coldest month of the year at Trail Valley , N. W. T. is January, with an average low of -20°F and high of -8°F.

At Trail Valley , N. W. T., 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 Trail Valley , N. W. T. begins around May 7 and lasts for 4.0 months, ending around September 6.

The clearest month of the year at Trail Valley , N. W. T. is June, during which on average the sky is clear, mostly clear, or partly cloudy 51% of the time.

The cloudier part of the year begins around September 6 and lasts for 8.0 months, ending around May 7.

The cloudiest month of the year at Trail Valley , N. W. T. is December, during which on average the sky is overcast or mostly cloudy 73% of the time.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days at Trail Valley , N. W. T. varies throughout the year.

The wetter season lasts 3.8 months, from May 31 to September 23, with a greater than 12% chance of a given day being a wet day. The month with the most wet days at Trail Valley , N. W. T. is August, with an average of 6.2 days with at least 0.04 inches of precipitation.

The drier season lasts 8.3 months, from September 23 to May 31. The month with the fewest wet days at Trail Valley , N. W. T. is March, with an average of 1.0 days with at least 0.04 inches of precipitation.

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 Trail Valley , N. W. T. changes throughout the year.

Snow alone is the most common for 7.4 months, from October 2 to May 14. The month with the most days of snow alone at Trail Valley , N. W. T. is October, with an average of 1.7 days.

Rain alone is the most common for 4.6 months, from May 14 to October 2. The month with the most days of rain alone at Trail Valley , N. W. T. is August, with an average of 6.0 days.

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. Trail Valley , N. W. T. experiences some seasonal variation in monthly rainfall.

The rainy period of the year lasts for 3.9 months, from May 27 to September 24, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain at Trail Valley , N. W. T. is August, with an average rainfall of 1.2 inches.

The rainless period of the year lasts for 8.1 months, from September 24 to May 27. The month with the least rain at Trail Valley , N. W. T. is February, with an average rainfall of -0.0 inches.

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Trail Valley , N. W. T. experiences some seasonal variation in monthly snowfall.

The snowy period of the year lasts for 9.2 months, from September 11 to June 16, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow at Trail Valley , N. W. T. is October, with an average snowfall of 2.9 inches.

The snowless period of the year lasts for 2.8 months, from June 16 to September 11. The least snow falls around July 22, with an average total accumulation of 0.0 inches.

Due to its extreme latitude, Trail Valley , N. W. T. experiences polar day (also known as the midnight Sun) during the summer and polar night during the winter. These are periods of time in which the sun is continuously above or below the horizon for more than one day. The precise start and end dates of polar day and night vary from year to year and depend on the precise location and elevation of the observer, and the local topography.

In the summer at Trail Valley , N. W. T. during 2024, the Sun is continuously above the horizon for 2.0 months, rising at 3:11 AM on May 21, and not setting again until 2:42 AM on July 21.

In the winter at Trail Valley , N. W. T. during 2024, the Sun is continuously below the horizon for 1.2 months, setting at 2:05 PM on December 1, and not rising again until 2:00 PM on January 9.

Daylight saving time (DST) is observed at Trail Valley , N. W. T. during 2024, starting in the spring on March 10, lasting 7.8 months, and ending in the fall on November 3.

The figure below presents a compact representation of key lunar data for 2024. 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.

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 Trail Valley , N. W. T., 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.

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 Trail Valley , N. W. T. experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 1.7 months, from May 6 to June 29, with average wind speeds of more than 9.2 miles per hour. The windiest month of the year at Trail Valley , N. W. T. is January, with an average hourly wind speed of 9.7 miles per hour.

The calmer time of year lasts for 10 months, from June 29 to May 6. The calmest month of the year at Trail Valley , N. W. T. is October, with an average hourly wind speed of 8.6 miles per hour.

The predominant average hourly wind direction at Trail Valley , N. W. T. varies throughout the year.

The wind is most often from the east for 2.9 months, from March 22 to June 19 and for 1.7 months, from August 26 to October 17, with a peak percentage of 39% on June 1. The wind is most often from the north for 2.2 months, from June 19 to August 26, with a peak percentage of 38% on July 12. The wind is most often from the south for 5.2 months, from October 17 to March 22, with a peak percentage of 39% on January 1.

Trail Valley , N. W. T. 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 1.9 months, from July 15 to September 11, with an average temperature above 40°F. The month of the year at Trail Valley , N. W. T. with the warmest water is August, with an average temperature of 42°F.

The time of year with cooler water lasts for 7.7 months, from October 14 to June 5, with an average temperature below 32°F. The month of the year at Trail Valley , N. W. T. with the coolest water is March, with an average temperature of 29°F.

To characterize how pleasant the weather is at Trail Valley , N. W. T. 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 Trail Valley , N. W. T. for general outdoor tourist activities is from late June to late July, with a peak score in the second 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 Trail Valley , N. W. T. for hot-weather activities is from late June to mid July, with a peak score in the first week of July.

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.

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 Trail Valley , N. W. T. typically lasts for 2.1 months (65 days), from around June 17 to around August 21, rarely starting before May 31, or ending after September 13.

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 Trail Valley , N. W. T. should appear around June 18, only rarely appearing before June 9 or after June 29.

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 2.4 months, from May 10 to July 23, with an average daily incident shortwave energy per square meter above 5.1 kWh. The brightest month of the year at Trail Valley , N. W. T. is June, with an average of 6.2 kWh.

The darker period of the year lasts for 5.3 months, from September 30 to March 7, with an average daily incident shortwave energy per square meter below 1.3 kWh. The darkest month of the year at Trail Valley , N. W. T. is December, with an average of 0.0 kWh.

For the purposes of this report, the geographical coordinates of Trail Valley , N. W. T. are 68.750 deg latitude, -133.500 deg longitude, and 299 ft elevation.

The topography within 2 miles of Trail Valley , N. W. T. contains only modest variations in elevation, with a maximum elevation change of 344 feet and an average elevation above sea level of 265 feet. Within 10 miles contains only modest variations in elevation (617 feet). Within 50 miles contains significant variations in elevation (1,142 feet).

The area within 2 miles of Trail Valley , N. W. T. is covered by sparse vegetation (48%) and grassland (47%), within 10 miles by sparse vegetation (41%) and grassland (26%), and within 50 miles by sparse vegetation (22%) and water (21%).