Average Weather in March in Saint John Canada
Daily high temperatures increase by 9°F, from 33°F to 42°F, rarely falling below 21°F or exceeding 51°F.
Daily low temperatures increase by 10°F, from 18°F to 28°F, rarely falling below 2°F or exceeding 37°F.
For reference, on July 27, the hottest day of the year, temperatures in Saint John typically range from 57°F to 72°F, while on January 30, the coldest day of the year, they range from 11°F to 28°F.
Average High and Low Temperature in March
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on March. The horizontal axis is the day, 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 March
The month of March in Saint John experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 60% throughout the month.
The clearest day of the month is March 31, with clear, mostly clear, or partly cloudy conditions 42% of the time.
For reference, on February 28, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 62%, while on September 3, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 62%.
Cloud Cover Categories in March
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. In Saint John, the chance of a wet day over the course of March is essentially constant, remaining around 28% throughout.
For reference, the year's highest daily chance of a wet day is 35% on December 16, and its lowest chance is 23% on September 3.
Over the course of March in Saint John, the chance of a day with only rain increases from 12% to 20%, the chance of a day with mixed snow and rain decreases from 8% to 5%, and the chance of a day with only snow decreases from 8% to 4%.
Probability of Precipitation in March
The average sliding 31-day rainfall during March in Saint John is increasing, starting the month at 1.9 inches, when it rarely exceeds 3.3 inches or falls below 0.5 inches, and ending the month at 2.5 inches, when it rarely exceeds 4.2 inches or falls below 1.0 inches.
Average Monthly Rainfall in March
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. As with rainfall, we consider the liquid-equivalent snowfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day liquid-equivalent snowfall during March in Saint John is decreasing, starting the month at 1.2 inches, when it rarely exceeds 2.1 inches or falls below 0.4 inches, and ending the month at 0.6 inches, when it rarely exceeds 1.3 inches.
Average Monthly Liquid-Equivalent Snowfall in March
Over the course of March in Saint John, the length of the day is rapidly increasing. From the start to the end of the month, the length of the day increases by 1 hour, 35 minutes, implying an average daily increase of 3 minutes, 11 seconds, and weekly increase of 22 minutes, 14 seconds.
The shortest day of the month is March 1, with 11 hours, 10 minutes of daylight and the longest day is March 31, with 12 hours, 45 minutes of daylight.
Hours of Daylight and Twilight in March
The earliest sunrise of the month in Saint John is 6:40 AM on March 13 and the latest sunrise is 58 minutes later at 7:38 AM on March 14.
The earliest sunset is 6:11 PM on March 1 and the latest sunset is 1 hour, 40 minutes later at 7:51 PM on March 31.
Daylight saving time (DST) starts at 3:00 AM on March 14, 2021, shifting sunrise and sunset to be an hour later.
For reference, on June 21, the longest day of the year, the Sun rises at 5:36 AM and sets 15 hours, 39 minutes later, at 9:15 PM, while on December 21, the shortest day of the year, it rises at 8:00 AM and sets 8 hours, 44 minutes later, at 4:44 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in March
The figure below presents a compact representation of key lunar data for March 2021. 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. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.
Moon Rise, Set & Phases in March
The chance that a given day will be muggy in Saint John is essentially constant during March, remaining around 0% throughout.
For reference, on August 9, the muggiest day of the year, there are muggy conditions 4% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in March
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Saint John is gradually decreasing during March, decreasing from 10.1 miles per hour to 9.3 miles per hour over the course of the month.
For reference, on January 13, the windiest day of the year, the daily average wind speed is 10.4 miles per hour, while on August 8, the calmest day of the year, the daily average wind speed is 5.9 miles per hour.
Average Wind Speed in March
The hourly average wind direction in Saint John throughout March is predominantly from the west, with a peak proportion of 35% on March 1.
Wind Direction in March
Saint John 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 surface water temperature in Saint John is essentially constant during March, remaining around 35°F throughout.
The lowest average surface water temperature during March is 35°F on March 15.
Average Water Temperature in March
The growing season in Saint John typically lasts for 5.1 months (158 days), from around May 7 to around October 12, rarely starting before April 19 or after May 26, and rarely ending before September 27 or after October 27.
The month of March in Saint John is reliably fully outside of the growing season.
Time Spent in Various Temperature Bands and the Growing Season in March
The average accumulated growing degree days in Saint John are essentially constant during March, remaining within 1°F of 1°F throughout.
Growing Degree Days in March
The average daily incident shortwave solar energy in Saint John is increasing during March, rising by 1.2 kWh, from 2.8 kWh to 4.1 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in March
For the purposes of this report, the geographical coordinates of Saint John are 45.273 deg latitude, -66.068 deg longitude, and 3 ft elevation.
The topography within 2 miles of Saint John contains only modest variations in elevation, with a maximum elevation change of 292 feet and an average elevation above sea level of 64 feet. Within 10 miles contains only modest variations in elevation (748 feet). Within 50 miles contains significant variations in elevation (1,450 feet).
The area within 2 miles of Saint John is covered by artificial surfaces (37%), water (26%), and trees (20%), within 10 miles by trees (53%) and water (36%), and within 50 miles by trees (50%) and water (45%).
This report illustrates the typical weather in Saint John, 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 Saint John.
For each station, the records are corrected for the elevation difference between that station and Saint John 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 Saint John is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Saint John and a given station.
The stations contributing to this reconstruction are: Saint John Airport (68%, 15 kilometers, east); Point Lepreau, N. B. (23%, 39 kilometers, southwest); and CFB Gagetown (10%, 69 kilometers, northwest).
Time zones for airports and weather stations are provided by AskGeo.com .