Climate and Average Weather Year Round at Mary's Harbour Airport Canada

At Mary's Harbour Airport, the summers are cool; the winters are frigid, snowy, and windy; and it is mostly cloudy year round. Over the course of the year, the temperature typically varies from 0°F to 66°F and is rarely below -17°F or above 79°F.

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

The warm season lasts for 3.0 months, from June 16 to September 16, with an average daily high temperature above 57°F. The hottest month of the year at Mary's Harbour Airport is August, with an average high of 64°F and low of 49°F.

The cold season lasts for 3.3 months, from December 6 to March 16, with an average daily high temperature below 27°F. The coldest month of the year at Mary's Harbour Airport is January, with an average low of 2°F and high of 19°F.

At Mary's Harbour Airport, the average percentage of the sky covered by clouds experiences mild seasonal variation over the course of the year.

The clearer part of the year at Mary's Harbour Airport begins around July 1 and lasts for 5.3 months, ending around December 10.

The clearest month of the year at Mary's Harbour Airport is August, during which on average the sky is clear, mostly clear, or partly cloudy 46% of the time.

The cloudier part of the year begins around December 10 and lasts for 6.7 months, ending around July 1.

The cloudiest month of the year at Mary's Harbour Airport is March, during which on average the sky is overcast or mostly cloudy 69% 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 Mary's Harbour Airport varies throughout the year.

The wetter season lasts 9.4 months, from May 18 to February 28, with a greater than 32% chance of a given day being a wet day. The month with the most wet days at Mary's Harbour Airport is July, with an average of 11.5 days with at least 0.04 inches of precipitation.

The drier season lasts 2.7 months, from February 28 to May 18. The month with the fewest wet days at Mary's Harbour Airport is April, with an average of 8.3 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 Mary's Harbour Airport changes throughout the year.

Rain alone is the most common for 7.2 months, from April 20 to November 25. The month with the most days of rain alone at Mary's Harbour Airport is July, with an average of 11.5 days.

Snow alone is the most common for 4.5 months, from November 25 to April 10. The month with the most days of snow alone at Mary's Harbour Airport is February, with an average of 6.6 days.

Mixed snow and rain is the most common for 1.4 weeks, from April 10 to April 20. The month with the most days of mixed snow and rain at Mary's Harbour Airport is December, with an average of 3.3 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. Mary's Harbour Airport experiences significant seasonal variation in monthly rainfall.

The rainy period of the year lasts for 9.9 months, from March 9 to January 6, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain at Mary's Harbour Airport is July, with an average rainfall of 3.0 inches.

The rainless period of the year lasts for 2.1 months, from January 6 to March 9. The month with the least rain at Mary's Harbour Airport is February, with an average rainfall of 0.4 inches.

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Mary's Harbour Airport experiences extreme seasonal variation in monthly snowfall.

The snowy period of the year lasts for 7.7 months, from October 12 to June 2, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow at Mary's Harbour Airport is January, with an average snowfall of 21.6 inches.

The snowless period of the year lasts for 4.3 months, from June 2 to October 12. The least snow falls around August 7, with an average total accumulation of 0.0 inches.

The length of the day at Mary's Harbour Airport varies extremely over the course of the year. In 2024, the shortest day is December 21, with 7 hours, 41 minutes of daylight; the longest day is June 20, with 16 hours, 48 minutes of daylight.

The earliest sunrise is at 4:50 AM on June 16, and the latest sunrise is 3 hours, 32 minutes later at 8:23 AM on December 29. The earliest sunset is at 4:00 PM on December 12, and the latest sunset is 5 hours, 39 minutes later at 9:39 PM on June 24.

Daylight saving time (DST) is observed at Mary's Harbour Airport 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 Mary's Harbour 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.

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 Mary's Harbour Airport experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 6.0 months, from October 13 to April 13, with average wind speeds of more than 9.4 miles per hour. The windiest month of the year at Mary's Harbour Airport is December, with an average hourly wind speed of 11.5 miles per hour.

The calmer time of year lasts for 6.0 months, from April 13 to October 13. The calmest month of the year at Mary's Harbour Airport is July, with an average hourly wind speed of 7.1 miles per hour.

The predominant average hourly wind direction at Mary's Harbour Airport varies throughout the year.

The wind is most often from the north for 2.7 months, from March 18 to June 8, with a peak percentage of 35% on March 19. The wind is most often from the south for 2.7 months, from June 8 to August 31, with a peak percentage of 41% on July 23. The wind is most often from the west for 6.6 months, from August 31 to March 18, with a peak percentage of 54% on January 1.

Mary's Harbour 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 1.9 months, from July 18 to September 16, with an average temperature above 45°F. The month of the year at Mary's Harbour Airport with the warmest water is August, with an average temperature of 49°F.

The time of year with cooler water lasts for 6.2 months, from November 22 to May 27, with an average temperature below 34°F. The month of the year at Mary's Harbour Airport with the coolest water is March, with an average temperature of 31°F.

To characterize how pleasant the weather is at Mary's Harbour 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 Mary's Harbour Airport 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 Mary's Harbour Airport for hot-weather activities is from mid July to mid August, with a peak score in the last 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 Mary's Harbour Airport typically lasts for 3.6 months (111 days), from around June 6 to around September 25, rarely starting before May 20 or after June 23, and rarely ending before September 7 or after October 12.

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 Mary's Harbour Airport should appear around June 25, only rarely appearing before June 15 or after July 11.

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 significant seasonal variation over the course of the year.

The brighter period of the year lasts for 4.0 months, from April 21 to August 22, with an average daily incident shortwave energy per square meter above 4.5 kWh. The brightest month of the year at Mary's Harbour Airport is July, with an average of 5.3 kWh.

The darker period of the year lasts for 3.6 months, from October 25 to February 12, with an average daily incident shortwave energy per square meter below 1.6 kWh. The darkest month of the year at Mary's Harbour Airport is December, with an average of 0.7 kWh.

For the purposes of this report, the geographical coordinates of Mary's Harbour Airport are 52.303 deg latitude, -55.844 deg longitude, and 39 ft elevation.

The topography within 2 miles of Mary's Harbour Airport contains only modest variations in elevation, with a maximum elevation change of 279 feet and an average elevation above sea level of 73 feet. Within 10 miles contains only modest variations in elevation (850 feet). Within 50 miles also contains very significant variations in elevation (1,601 feet).

The area within 2 miles of Mary's Harbour Airport is covered by sparse vegetation (30%), water (27%), trees (23%), and grassland (13%), within 10 miles by trees (32%) and water (29%), and within 50 miles by water (55%) and trees (25%).