Average Weather at Toronto/Buttonville Municipal Airport Canada
At Toronto/Buttonville Municipal Airport, the summers are warm; the winters are freezing, dry, and windy; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 14°F to 80°F and is rarely below -4°F or above 89°F.
Based on the tourism score, the best time of year to visit Toronto/Buttonville Municipal Airport for warm-weather activities is from late June to early September.
The warm season lasts for 3.6 months, from May 28 to September 17, with an average daily high temperature above 70°F. The hottest day of the year is July 20, with an average high of 80°F and low of 62°F.
The cold season lasts for 3.4 months, from December 2 to March 14, with an average daily high temperature below 38°F. The coldest day of the year is January 29, with an average low of 14°F and high of 28°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
Znomenka, Ukraine (4,841 miles away); Tatvan, Turkey (5,688 miles); and Lermontov, Russia (5,406 miles) are the far-away foreign places with temperatures most similar to Toronto/Buttonville Municipal Airport (view comparison).
At Toronto/Buttonville Municipal 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 Toronto/Buttonville Municipal Airport begins around May 31 and lasts for 4.9 months, ending around October 27. On August 20, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 67% of the time, and overcast or mostly cloudy 33% of the time.
The cloudier part of the year begins around October 27 and lasts for 7.1 months, ending around May 31. On January 10, the cloudiest day of the year, the sky is overcast or mostly cloudy 63% of the time, and clear, mostly clear, or partly cloudy 37% 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 at Toronto/Buttonville Municipal Airport varies throughout the year.
The wetter season lasts 7.8 months, from March 31 to November 23, with a greater than 22% chance of a given day being a wet day. The chance of a wet day peaks at 31% on October 7.
The drier season lasts 4.3 months, from November 23 to March 31. The smallest chance of a wet day is 13% on January 31.
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 Toronto/Buttonville Municipal Airport changes throughout the year.
Rain alone is the most common for 11 months, from February 24 to January 11. The highest chance of a day with rain alone is 30% on October 7.
Snow alone is the most common for 1.4 months, from January 11 to February 24. The highest chance of a day with snow alone is 7% on January 21.
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. Toronto/Buttonville Municipal Airport experiences some seasonal variation in monthly rainfall.
The rainy period of the year lasts for 11 months, from February 17 to January 12, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around September 23, with an average total accumulation of 2.1 inches.
The rainless period of the year lasts for 1.2 months, from January 12 to February 17. The least rain falls around January 28, with an average total accumulation of 0.4 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. Toronto/Buttonville Municipal Airport experiences some seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 5.0 months, from November 12 to April 13, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around February 16, with an average total liquid-equivalent accumulation of 0.4 inches.
The snowless period of the year lasts for 7.0 months, from April 13 to November 12. The least snow falls around July 21, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
The length of the day at Toronto/Buttonville Municipal Airport varies significantly over the course of the year. In 2018, the shortest day is December 21, with 8 hours, 54 minutes of daylight; the longest day is June 21, with 15 hours, 28 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:34 AM on June 15, and the latest sunrise is 2 hours, 22 minutes later at 7:56 AM on November 3. The earliest sunset is at 4:39 PM on December 9, and the latest sunset is 4 hours, 24 minutes later at 9:03 PM on June 26.
Daylight saving time (DST) is observed at Toronto/Buttonville Municipal Airport during 2018, starting in the spring on March 11, lasting 7.8 months, and ending in the fall on November 4.
Sunrise & Sunset with Twilight and Daylight Saving Time
Toronto/Buttonville Municipal Airport experiences some seasonal variation in the perceived humidity.
The muggier period of the year lasts for 3.5 months, from June 5 to September 21, during which time the comfort level is muggy, oppressive, or miserable at least 5% of the time. The muggiest day of the year is August 1, with muggy conditions 21% of the time.
The least muggy day of the year is November 28, when muggy conditions are essentially unheard of.
Humidity Comfort Levels
The average hourly wind speed at Toronto/Buttonville Municipal Airport experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 5.8 months, from October 26 to April 21, with average wind speeds of more than 11.0 miles per hour. The windiest day of the year is January 12, with an average hourly wind speed of 13.7 miles per hour.
The calmer time of year lasts for 6.2 months, from April 21 to October 26. The calmest day of the year is August 4, with an average hourly wind speed of 8.3 miles per hour.
Average Wind Speed
The predominant average hourly wind direction at Toronto/Buttonville Municipal Airport is from the west throughout the year.
Toronto/Buttonville Municipal 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 2.7 months, from July 4 to September 25, with an average temperature above 62°F. The day of the year with the warmest water is August 10, with an average temperature of 69°F.
The time of year with cooler water lasts for 5.1 months, from December 10 to May 13, with an average temperature below 42°F. The day of the year with the coolest water is March 8, with an average temperature of 36°F.
Average Water Temperature
Best Time of Year to Visit
To characterize how pleasant the weather is at Toronto/Buttonville Municipal 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 Toronto/Buttonville Municipal Airport for general outdoor tourist activities is from late June to early September, with a peak score in the second 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 Toronto/Buttonville Municipal Airport for hot-weather activities is from early July to mid August, with a peak score in the third week of July.
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 at Toronto/Buttonville Municipal Airport typically lasts for 5.3 months (162 days), from around May 3 to around October 12, rarely starting before April 14 or after May 21, and rarely ending before September 25 or after October 30.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms at Toronto/Buttonville Municipal Airport should appear around May 2, only rarely appearing before April 20 or after May 15.
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 3.6 months, from May 2 to August 20, with an average daily incident shortwave energy per square meter above 5.8 kWh. The brightest day of the year is June 30, with an average of 6.9 kWh.
The darker period of the year lasts for 3.5 months, from October 30 to February 13, with an average daily incident shortwave energy per square meter below 2.4 kWh. The darkest day of the year is December 24, with an average of 1.3 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Toronto/Buttonville Municipal Airport are 43.862 deg latitude, -79.370 deg longitude, and 650 ft elevation.
The topography within 2 miles of Toronto/Buttonville Municipal Airport contains only modest variations in elevation, with a maximum elevation change of 180 feet and an average elevation above sea level of 645 feet. Within 10 miles contains only modest variations in elevation (797 feet). Within 50 miles contains significant variations in elevation (1,512 feet).
The area within 2 miles of Toronto/Buttonville Municipal Airport is covered by artificial surfaces (52%), cropland (21%), bare soil (11%), and trees (11%), within 10 miles by artificial surfaces (38%) and cropland (25%), and within 50 miles by water (31%) and trees (25%).
This report illustrates the typical weather at Toronto/Buttonville Municipal Airport, 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
Toronto/Buttonville Municipal Airport has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required.
In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations.
The stations on which we may fall back include but are not limited to Billy Bishop Toronto City Airport; Toronto Pearson International Airport; Oshawa Airport; Crn On Egbert 1 W; Egbert Meteorological Aeronautical Presentation System; Port Weller, Ont.; Borden, Ont.; and Vineland Station Rcs.
Time zones for aiports and weather stations are provided by AskGeo.com .