Climate and Average Weather Year Round at Fredericton International Airport Canada

At Fredericton International Airport, the summers are comfortable, the winters are freezing and snowy, and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 7°F to 78°F and is rarely below -10°F or above 86°F.

Based on the tourism score, the best time of year to visit Fredericton International Airport for warm-weather activities is from late June to early September.

The warm season lasts for 3.6 months, from May 29 to September 16, with an average daily high temperature above 67°F. The hottest month of the year at Fredericton International Airport is July, with an average high of 77°F and low of 58°F.

The cold season lasts for 3.3 months, from December 2 to March 11, with an average daily high temperature below 36°F. The coldest month of the year at Fredericton International Airport is January, with an average low of 8°F and high of 26°F.

At Fredericton International 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 Fredericton International Airport begins around June 18 and lasts for 4.3 months, ending around October 27.

The clearest month of the year at Fredericton International Airport is September, during which on average the sky is clear, mostly clear, or partly cloudy 59% of the time.

The cloudier part of the year begins around October 27 and lasts for 7.7 months, ending around June 18.

The cloudiest month of the year at Fredericton International Airport is February, during which on average the sky is overcast or mostly cloudy 63% 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 Fredericton International Airport varies throughout the year.

The wetter season lasts 9.0 months, from April 8 to January 7, with a greater than 30% chance of a given day being a wet day. The month with the most wet days at Fredericton International Airport is July, with an average of 10.6 days with at least 0.04 inches of precipitation.

The drier season lasts 3.0 months, from January 7 to April 8. The month with the fewest wet days at Fredericton International Airport is February, with an average of 7.2 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 Fredericton International Airport changes throughout the year.

Rain alone is the most common for 9.1 months, from March 12 to December 13. The month with the most days of rain alone at Fredericton International Airport is July, with an average of 10.6 days.

Snow alone is the most common for 2.9 months, from December 13 to March 12. The month with the most days of snow alone at Fredericton International Airport is January, with an average of 4.7 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. Fredericton International Airport experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year at Fredericton International Airport. The month with the most rain at Fredericton International Airport is October, with an average rainfall of 3.7 inches.

The month with the least rain at Fredericton International Airport is February, with an average rainfall of 1.0 inches.

Snowfall

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

The snowy period of the year lasts for 5.9 months, from October 29 to April 27, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow at Fredericton International Airport is January, with an average snowfall of 16.6 inches.

The snowless period of the year lasts for 6.1 months, from April 27 to October 29. The least snow falls around July 27, with an average total accumulation of 0.0 inches.

The length of the day at Fredericton International Airport varies significantly over the course of the year. In 2024, the shortest day is December 21, with 8 hours, 39 minutes of daylight; the longest day is June 20, with 15 hours, 44 minutes of daylight.

The earliest sunrise is at 5:35 AM on June 15, and the latest sunrise is 2 hours, 33 minutes later at 8:08 AM on November 2. The earliest sunset is at 4:41 PM on December 10, and the latest sunset is 4 hours, 39 minutes later at 9:20 PM on June 26.

Daylight saving time (DST) is observed at Fredericton International 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.

Fredericton International Airport experiences some seasonal variation in the perceived humidity.

The muggier period of the year lasts for 2.9 months, from June 18 to September 15, during which time the comfort level is muggy, oppressive, or miserable at least 3% of the time. The month with the most muggy days at Fredericton International Airport is July, with 3.4 days that are muggy or worse.

The least muggy day of the year is February 23, when muggy conditions are essentially unheard of.

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 Fredericton International Airport experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 6.8 months, from October 16 to May 8, with average wind speeds of more than 5.5 miles per hour. The windiest month of the year at Fredericton International Airport is March, with an average hourly wind speed of 6.5 miles per hour.

The calmer time of year lasts for 5.2 months, from May 8 to October 16. The calmest month of the year at Fredericton International Airport is August, with an average hourly wind speed of 4.6 miles per hour.

The predominant average hourly wind direction at Fredericton International Airport varies throughout the year.

The wind is most often from the south for 3.8 months, from April 23 to August 17 and for 6.0 days, from September 14 to September 20, with a peak percentage of 45% on July 14. The wind is most often from the west for 4.0 weeks, from August 17 to September 14 and for 7.1 months, from September 20 to April 23, with a peak percentage of 38% on August 20.

Fredericton International 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 significant seasonal variation over the course of the year.

The time of year with warmer water lasts for 3.4 months, from July 4 to October 17, with an average temperature above 52°F. The month of the year at Fredericton International Airport with the warmest water is August, with an average temperature of 56°F.

The time of year with cooler water lasts for 3.7 months, from January 12 to May 3, with an average temperature below 39°F. The month of the year at Fredericton International Airport with the coolest water is March, with an average temperature of 35°F.

To characterize how pleasant the weather is at Fredericton International 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 Fredericton International Airport for general outdoor tourist activities is from late June to early September, 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 Fredericton International Airport for hot-weather activities is from early 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 Fredericton International Airport typically lasts for 4.9 months (150 days), from around May 5 to around October 2, rarely starting before April 19 or after May 22, and rarely ending before September 15 or after October 19.

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 Fredericton International Airport should appear around May 13, only rarely appearing before May 5 or after May 21.

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 3.5 months, from May 8 to August 24, with an average daily incident shortwave energy per square meter above 5.4 kWh. The brightest month of the year at Fredericton International Airport is June, with an average of 6.3 kWh.

The darker period of the year lasts for 3.5 months, from October 28 to February 13, with an average daily incident shortwave energy per square meter below 2.3 kWh. The darkest month of the year at Fredericton International Airport is December, with an average of 1.2 kWh.

For the purposes of this report, the geographical coordinates of Fredericton International Airport are 45.870 deg latitude, -66.532 deg longitude, and 72 ft elevation.

The topography within 2 miles of Fredericton International Airport is essentially flat, with a maximum elevation change of 89 feet and an average elevation above sea level of 38 feet. Within 10 miles is essentially flat (495 feet). Within 50 miles contains significant variations in elevation (1,640 feet).

The area within 2 miles of Fredericton International Airport is covered by trees (61%), water (18%), and cropland (11%), within 10 miles by trees (83%), and within 50 miles by trees (91%).