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Average Weather at Oshawa Airport Canada

At Oshawa Airport, the summers are comfortable; 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 13°F to 78°F and is rarely below -4°F or above 86°F.

Climate Summary

freezingvery coldcoldcoolwarmcoolcoldvery coldJanFebMarAprMayJunJulAugSepOctNovDec66%66%35%35%clearovercastprecipitation: 2.1 inprecipitation: 2.1 in0.8 in0.8 inmuggy: 17%muggy: 17%0%0%drydrytourism score: 7.0tourism score: 7.00.00.0
Click on each chart for more information.

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

Temperature

The warm season lasts for 3.7 months, from May 27 to September 18, with an average daily high temperature above 68°F. The hottest day of the year is July 20, with an average high of 78°F and low of 59°F.

The cold season lasts for 3.4 months, from December 4 to March 15, with an average daily high temperature below 38°F. The coldest day of the year is January 29, with an average low of 13°F and high of 28°F.

Average High and Low Temperature

The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

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

Average Hourly Temperature at Oshawa AirportJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMfreezingfreezingvery coldcoldcoldcoolcomfortablevery coldwarm
The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < very cold < 45°F < cold < 55°F < cool < 65°F < comfortable < 75°F < warm < 85°F < hot < 95°F < sweltering. The shaded overlays indicate night and civil twilight.

Sapporo, Japan (5,939 miles away) is the far-away foreign place with temperatures most similar to Oshawa Airport (view comparison).

Clouds

At Oshawa 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 Oshawa Airport begins around May 30 and lasts for 5.0 months, ending around October 28. On August 20, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 66% of the time, and overcast or mostly cloudy 34% of the time.

The cloudier part of the year begins around October 28 and lasts for 7.0 months, ending around May 30. On January 11, the cloudiest day of the year, the sky is overcast or mostly cloudy 65% of the time, and clear, mostly clear, or partly cloudy 35% of the time.

Cloud Cover Categories

Cloud Cover Categories at Oshawa AirportclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Aug 2066%Aug 2066%Jan 1135%Jan 1135%May 3050%May 3050%Oct 2851%Oct 2851%clearpartly cloudymostly cloudyovercastmostly clear
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days at Oshawa Airport varies throughout the year.

The wetter season lasts 8.4 months, from March 30 to December 12, with a greater than 22% chance of a given day being a wet day. The chance of a wet day peaks at 30% on June 13.

The drier season lasts 3.6 months, from December 12 to March 30. The smallest chance of a wet day is 14% on February 3.

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 Oshawa Airport changes throughout the year.

Rain alone is the most common for 10 months, from February 25 to January 10. The highest chance of a day with rain alone is 30% on June 13.

Snow alone is the most common for 1.5 months, from January 10 to February 25. The highest chance of a day with snow alone is 8% on January 21.

Daily Chance of Precipitation

Daily Chance of Precipitation at Oshawa AirportsnowrainJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Jun 1330%Jun 1330%Feb 314%Feb 314%Jan 119%Jan 119%Mar 3022%Mar 3022%rainsnowmixed
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

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. Oshawa Airport experiences some seasonal variation in monthly rainfall.

The rainy period of the year lasts for 11 months, from February 16 to January 16, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around September 25, with an average total accumulation of 2.1 inches.

The rainless period of the year lasts for 1.0 months, from January 16 to February 16. The least rain falls around January 29, with an average total accumulation of 0.4 inches.

Average Monthly Rainfall

Average Monthly Rainfall at Oshawa AirportrainJanFebMarAprMayJunJulAugSepOctNovDec0.0 in0.5 in1.0 in1.5 in2.0 in2.5 in3.0 in3.5 in4.0 inSep 252.1 inSep 252.1 inJan 290.4 inJan 290.4 inJun 21.9 inJun 21.9 inJul 281.8 inJul 281.8 in
The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average liquid-equivalent snowfall.

Snowfall

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. Oshawa Airport experiences some seasonal variation in monthly liquid-equivalent snowfall.

The snowy period of the year lasts for 5.7 months, from November 1 to April 23, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around March 2, with an average total liquid-equivalent accumulation of 0.4 inches.

The snowless period of the year lasts for 6.3 months, from April 23 to November 1. The least snow falls around August 9, with an average total liquid-equivalent accumulation of 0.0 inches.

Average Liquid-Equivalent Monthly Snowfall

The average liquid-equivalent snowfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average rainfall.

Sun

The length of the day at Oshawa Airport varies significantly over the course of the year. In 2017, the shortest day is December 21, with 8 hours, 54 minutes of daylight; the longest day is June 21, with 15 hours, 29 minutes of daylight.

Hours of Daylight and Twilight

Hours of Daylight and Twilight at Oshawa AirportJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 7 minMar 2012 hr, 7 minMar 2015 hr, 29 minJun 2115 hr, 29 minJun 2112 hr, 9 minSep 2212 hr, 9 minSep 228 hr, 54 minDec 218 hr, 54 minDec 21nightnightday
The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise is at 5:32 AM on June 15, and the latest sunrise is 2 hours, 24 minutes later at 7:56 AM on November 4. The earliest sunset is at 4:37 PM on December 9, and the latest sunset is 4 hours, 25 minutes later at 9:02 PM on June 26.

Daylight saving time (DST) is observed at Oshawa Airport during 2017, starting in the spring on March 12, lasting 7.8 months, and ending in the fall on November 5.

Sunrise & Sunset with Twilight and Daylight Saving Time

Sunrise & Sunset with Twilight and Daylight Saving Time at Oshawa AirportJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 155:32 AMJun 155:32 AM9:02 PMJun 269:02 PMJun 26Dec 94:37 PMDec 94:37 PM7:56 AMNov 47:56 AMNov 4Mar 12DSTMar 12DSTDSTNov 5DSTNov 5daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of the year 2017. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. The transitions to and from daylight saving time are indicated by the 'DST' labels.

Humidity

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.

Oshawa Airport experiences some seasonal variation in the perceived humidity.

The muggier period of the year lasts for 3.5 months, from June 8 to September 22, during which time the comfort level is muggy, oppressive, or miserable at least 4% of the time. The muggiest day of the year is July 29, with muggy conditions 17% of the time.

The least muggy day of the year is November 28, when muggy conditions are essentially unheard of.

Humidity Comfort Levels

Humidity Comfort Levels at Oshawa AirportmuggyJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Nov 280%Nov 280%Jul 2917%Jul 2917%Jun 84%Jun 84%Sep 224%Sep 224%muggymuggycomfortablecomfortabledrydry
The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.

Wind

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 Oshawa Airport experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 5.8 months, from October 25 to April 19, with average wind speeds of more than 11.4 miles per hour. The windiest day of the year is January 12, with an average hourly wind speed of 14.2 miles per hour.

The calmer time of year lasts for 6.2 months, from April 19 to October 25. The calmest day of the year is August 4, with an average hourly wind speed of 8.6 miles per hour.

Average Wind Speed

Average Wind Speed at Oshawa AirportwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph2 mph4 mph6 mph8 mph10 mph12 mph14 mph16 mph18 mph20 mph22 mphJan 1214.2 mphJan 1214.2 mphAug 48.6 mphAug 48.6 mphOct 2511.4 mphOct 2511.4 mphApr 1911.4 mphApr 1911.4 mph
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The predominant average hourly wind direction at Oshawa Airport is from the west throughout the year.

Wind Direction

Wind Direction at Oshawa AirportJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%westsoutheastnorth
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Water Temperature

Oshawa 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 2.6 months, from July 4 to September 24, with an average temperature above 63°F. The day of the year with the warmest water is August 10, with an average temperature of 70°F.

The time of year with cooler water lasts for 5.4 months, from December 3 to May 15, with an average temperature below 43°F. The day of the year with the coolest water is March 5, with an average temperature of 36°F.

Average Water Temperature

Average Water Temperature at Oshawa AirportwarmcoolcoolJanFebMarAprMayJunJulAugSepOctNovDec30°F35°F40°F45°F50°F55°F60°F65°F70°F75°F80°FAug 1070°FAug 1070°F36°FMar 536°FMar 5Jul 463°FJul 463°FSep 2463°FSep 2463°FDec 343°FDec 343°FMay 1543°FMay 1543°F
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

Best Time of Year to Visit

To characterize how pleasant the weather is at Oshawa 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 Oshawa Airport for general outdoor tourist activities is from late June to early September, with a peak score in the second week of August.

Tourism Score

Tourism Score at Oshawa Airportbest timeJanFebMarAprMayJunJulAugSepOctNovDec02468107.07.00.00.0 precipitationprecipitationcloudscloudstemperaturetemperaturetourism score
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

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 Oshawa Airport for hot-weather activities is from early July to mid August, with a peak score in the last week of July.

Beach/Pool Score

Beach/Pool Score at Oshawa Airportbest timeJanFebMarAprMayJunJulAugSepOctNovDec02468104.34.30.00.0 precipitationprecipitationcloudscloudstemperaturetemperaturebeach/pool score
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

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.

Growing Season

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 Oshawa Airport typically lasts for 5.1 months (157 days), from around May 6 to around October 11, rarely starting before April 17 or after May 26, and rarely ending before September 24 or after October 28.

Time Spent in Various Temperature Bands and the Growing Season

Time Spent in Various Temperature Bands and the Growing Season at Oshawa Airportgrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%May 650%May 650%Oct 1150%Oct 1150%May 2690%May 2690%Sep 2490%Sep 2490%Apr 1710%Apr 1710%Oct 2810%Oct 2810%0%Feb 110%Feb 11Jul 28100%Jul 28100%frigidfreezingvery coldcoolcomfortablewarmcold
The percentage of time spent in various temperature bands: frigid < 15°F < freezing < 32°F < very cold < 45°F < cold < 55°F < cool < 65°F < comfortable < 75°F < warm < 85°F < hot < 95°F < sweltering. The black line is the percentage chance that a given day is within the growing season.

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 Oshawa Airport should appear around May 7, only rarely appearing before April 25 or after May 20.

Growing Degree Days

The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

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 3.6 months, from May 3 to August 21, with an average daily incident shortwave energy per square meter above 5.8 kWh. The brightest day of the year is June 29, with an average of 6.9 kWh.

The darker period of the year lasts for 3.5 months, from October 30 to February 14, 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

Average Daily Incident Shortwave Solar Energy at Oshawa AirportbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWh9 kWhJun 296.9 kWhJun 296.9 kWhDec 241.3 kWhDec 241.3 kWhMay 35.8 kWhMay 35.8 kWhAug 215.8 kWhAug 215.8 kWhOct 302.4 kWhOct 302.4 kWhFeb 142.4 kWhFeb 142.4 kWh
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of Oshawa Airport are 43.923 deg latitude, -78.895 deg longitude, and 436 ft elevation.

The topography within 2 miles of Oshawa Airport contains only modest variations in elevation, with a maximum elevation change of 197 feet and an average elevation above sea level of 438 feet. Within 10 miles contains only modest variations in elevation (896 feet). Within 50 miles also contains very significant variations in elevation (1,096 feet).

The area within 2 miles of Oshawa Airport is covered by artificial surfaces (49%), trees (20%), and cropland (15%), within 10 miles by cropland (25%) and trees (24%), and within 50 miles by water (41%) and trees (23%).

Data Sources

This report illustrates the typical weather at Oshawa 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

Oshawa 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 Toronto/Buttonville Municipal Airport; Billy Bishop Toronto City Airport; Peterborough Airport; Lagoon City; Cobourg, Ont.; Peterborough Trent U; Port Weller, Ont.; and Toronto Pearson International Airport.

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , by Jean Meeus.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for aiports and weather stations are provided by AskGeo.com .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.