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Average Weather at Osoyoos Automatic Weather Reporting System Canada

At Osoyoos Automatic Weather Reporting System, the summers are warm, the winters are freezing, and it is dry and partly cloudy year round. Over the course of the year, the temperature typically varies from 23°F to 88°F and is rarely below 9°F or above 97°F.

Climate Summary

very coldcoldcoolwarmhotwarmcoolcoldvery coldJanFebMarAprMayJunJulAugSepOctNovDec77%77%37%37%clearovercastprecipitation: 1.3 inprecipitation: 1.3 in0.4 in0.4 inmuggy: 1%muggy: 1%0%0%drydrytourism score: 7.3tourism score: 7.30.00.0
Click on each chart for more information.

Based on the tourism score, the best time of year to visit Osoyoos Automatic Weather Reporting System for warm-weather activities is from early July to late August.

Temperature

The hot season lasts for 3.0 months, from June 10 to September 11, with an average daily high temperature above 77°F. The hottest day of the year is August 2, with an average high of 88°F and low of 59°F.

The cold season lasts for 3.1 months, from November 17 to February 20, with an average daily high temperature below 44°F. The coldest day of the year is December 30, with an average low of 23°F and high of 32°F.

Average High and Low Temperature

Average High and Low Temperature at Osoyoos Automatic Weather Reporting SystemhotcoldcoldJanFebMarAprMayJunJulAugSepOctNovDec0°F10°F20°F30°F40°F50°F60°F70°F80°F90°F100°FDec 3032°FDec 3032°FAug 288°FAug 288°F23°F23°F59°F59°FJun 1077°FJun 1077°FSep 1177°FSep 1177°FFeb 2044°FFeb 2044°F52°F52°F50°F50°F32°F32°F28°F28°FLowHigh
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 Osoyoos Automatic Weather Reporting SystemJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMfreezingfreezingvery coldvery coldcoldcoldcoolwarmhotcomfortablecomfortable
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.

Sofia, Bulgaria (5,715 miles away) is the far-away foreign place with temperatures most similar to Osoyoos Automatic Weather Reporting System (view comparison).

Clouds

At Osoyoos Automatic Weather Reporting System, 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 Osoyoos Automatic Weather Reporting System begins around June 12 and lasts for 3.8 months, ending around October 6. On August 3, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 77% of the time, and overcast or mostly cloudy 23% of the time.

The cloudier part of the year begins around October 6 and lasts for 8.2 months, ending around June 12. On January 9, 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

Cloud Cover Categories at Osoyoos Automatic Weather Reporting SystemclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Aug 377%Aug 377%Jan 937%Jan 937%Jun 1257%Jun 1257%Oct 657%Oct 657%clearmostly clearpartly cloudymostly cloudyovercast
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 Osoyoos Automatic Weather Reporting System varies throughout the year.

The wetter season lasts 8.0 months, from October 25 to June 26, with a greater than 16% chance of a given day being a wet day. The chance of a wet day peaks at 24% on May 29.

The drier season lasts 4.0 months, from June 26 to October 25. The smallest chance of a wet day is 8% on August 12.

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 throughout the year is rain alone, with a peak probability of 24% on May 29.

Daily Chance of Precipitation

Daily Chance of Precipitation at Osoyoos Automatic Weather Reporting SystemwetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%May 2924%May 2924%Aug 128%Aug 128%Jan 116%Jan 116%Oct 2516%Oct 2516%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. Osoyoos Automatic Weather Reporting System experiences some seasonal variation in monthly rainfall.

The rainy period of the year lasts for 10 months, from February 20 to December 24, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around June 4, with an average total accumulation of 1.3 inches.

The rainless period of the year lasts for 1.9 months, from December 24 to February 20. The least rain falls around January 15, with an average total accumulation of 0.3 inches.

Average Monthly Rainfall

Average Monthly Rainfall at Osoyoos Automatic Weather Reporting SystemrainJanFebMarAprMayJunJulAugSepOctNovDec0.0 in0.5 in1.0 in1.5 in2.0 in2.5 inJun 41.3 inJun 41.3 inJan 150.3 inJan 150.3 inNov 170.9 inNov 170.9 inSep 180.4 inSep 180.4 inFeb 200.5 inFeb 200.5 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. Osoyoos Automatic Weather Reporting System experiences some seasonal variation in monthly liquid-equivalent snowfall.

The snowy period of the year lasts for 3.1 months, from November 14 to February 18, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around January 3, with an average total liquid-equivalent accumulation of 0.3 inches.

The snowless period of the year lasts for 8.9 months, from February 18 to November 14. The least snow falls around July 11, with an average total liquid-equivalent accumulation of 0.0 inches.

Average Liquid-Equivalent Monthly Snowfall

Average Liquid-Equivalent Monthly Snowfall at Osoyoos Automatic Weather Reporting SystemsnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0.0 in0.2 in0.4 in0.6 in0.8 in1.0 in1.2 in1.4 inJan 30.3 inJan 30.3 inJul 110.0 inJul 110.0 inNov 140.1 inNov 140.1 inFeb 180.1 inFeb 180.1 in
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 Osoyoos Automatic Weather Reporting System varies extremely over the course of the year. In 2018, the shortest day is December 21, with 8 hours, 13 minutes of daylight; the longest day is June 21, with 16 hours, 13 minutes of daylight.

Hours of Daylight and Twilight

Hours of Daylight and Twilight at Osoyoos Automatic Weather Reporting SystemJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 7 minMar 2012 hr, 7 minMar 2016 hr, 13 minJun 2116 hr, 13 minJun 2112 hr, 11 minSep 2212 hr, 11 minSep 228 hr, 13 minDec 218 hr, 13 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 4:52 AM on June 16, and the latest sunrise is 2 hours, 59 minutes later at 7:51 AM on December 31. The earliest sunset is at 4:00 PM on December 11, and the latest sunset is 5 hours, 6 minutes later at 9:06 PM on June 25.

Daylight saving time (DST) is observed at Osoyoos Automatic Weather Reporting System 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

Sunrise & Sunset with Twilight and Daylight Saving Time at Osoyoos Automatic Weather Reporting SystemJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 164:52 AMJun 164:52 AM9:06 PMJun 259:06 PMJun 25Dec 114:00 PMDec 114:00 PM7:51 AMDec 317:51 AMDec 31Mar 11DSTMar 11DSTDSTNov 4DSTNov 4daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunset
The solar day over the course of the year 2018. 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.

The perceived humidity level at Osoyoos Automatic Weather Reporting System, 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.

Humidity Comfort Levels

Humidity Comfort Levels at Osoyoos Automatic Weather Reporting SystemJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Jan 220%Jan 220%Aug 31%Aug 31%drydrycomfortablecomfortablehumidhumid
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 Osoyoos Automatic Weather Reporting System does not vary significantly over the course of the year, remaining within 0.3 miles per hour of 4.0 miles per hour throughout.

Average Wind Speed

Average Wind Speed at Osoyoos Automatic Weather Reporting SystemJanFebMarAprMayJunJulAugSepOctNovDec0 mph1 mph2 mph3 mph4 mph5 mph6 mph7 mphApr 184.4 mphApr 184.4 mphAug 53.7 mphAug 53.7 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 Osoyoos Automatic Weather Reporting System varies throughout the year.

The wind is most often from the west for 3.4 months, from April 5 to July 18, with a peak percentage of 39% on May 3. The wind is most often from the north for 2.3 months, from July 18 to September 28, with a peak percentage of 41% on August 2. The wind is most often from the south for 6.2 months, from September 28 to April 5, with a peak percentage of 51% on January 1.

Wind Direction

Wind Direction at Osoyoos Automatic Weather Reporting SystemSWNSJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%westsouthnortheast
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).

Best Time of Year to Visit

To characterize how pleasant the weather is at Osoyoos Automatic Weather Reporting System 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 Osoyoos Automatic Weather Reporting System for general outdoor tourist activities is from early July to late August, with a peak score in the last week of July.

Tourism Score

Tourism Score at Osoyoos Automatic Weather Reporting Systembest timeJanFebMarAprMayJunJulAugSepOctNovDec02468107.37.30.00.0 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 Osoyoos Automatic Weather Reporting System for hot-weather activities is from mid July to mid August, with a peak score in the first week of August.

Beach/Pool Score

Beach/Pool Score at Osoyoos Automatic Weather Reporting SystemJanFebMarAprMayJunJulAugSepOctNovDec02468104.14.10.00.0 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 Osoyoos Automatic Weather Reporting System typically lasts for 5.6 months (171 days), from around April 25 to around October 12, rarely starting before April 6 or after May 13, and rarely ending before September 23 or after October 30.

Time Spent in Various Temperature Bands and the Growing Season

Time Spent in Various Temperature Bands and the Growing Season at Osoyoos Automatic Weather Reporting Systemgrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Apr 2550%Apr 2550%Oct 1250%Oct 1250%May 1390%May 1390%Sep 2390%Sep 2390%Apr 610%Apr 610%Oct 3010%Oct 3010%0%Dec 150%Dec 15Jul 18100%Jul 18100%freezingvery coldcoldcoolcomfortablewarmfrigidhot
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 Osoyoos Automatic Weather Reporting System should appear around April 17, only rarely appearing before April 8 or after April 28.

Growing Degree Days

Growing Degree Days at Osoyoos Automatic Weather Reporting SystemJanFebMarAprMayJunJulAugSepOctNovDec0°F500°F1,000°F1,500°F2,000°F2,500°FApr 1790°FApr 1790°FJun 29900°FJun 29900°FAug 111,800°FAug 111,800°FDec 312,653°FDec 312,653°F
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 3.4 months, from May 9 to August 21, with an average daily incident shortwave energy per square meter above 6.1 kWh. The brightest day of the year is July 15, with an average of 7.4 kWh.

The darker period of the year lasts for 3.6 months, from October 25 to February 14, with an average daily incident shortwave energy per square meter below 2.3 kWh. The darkest day of the year is December 24, with an average of 1.1 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy at Osoyoos Automatic Weather Reporting SystembrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWh9 kWhJul 157.4 kWhJul 157.4 kWhDec 241.1 kWhDec 241.1 kWhMay 96.1 kWhMay 96.1 kWhAug 216.1 kWhAug 216.1 kWhOct 252.3 kWhOct 252.3 kWhFeb 142.3 kWhFeb 142.3 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 Osoyoos Automatic Weather Reporting System are 49.033 deg latitude, -119.433 deg longitude, and 1,270 ft elevation.

The topography within 2 miles of Osoyoos Automatic Weather Reporting System contains extreme variations in elevation, with a maximum elevation change of 3,304 feet and an average elevation above sea level of 1,614 feet. Within 10 miles also contains extreme variations in elevation (4,692 feet). Within 50 miles also contains extreme variations in elevation (7,782 feet).

The area within 2 miles of Osoyoos Automatic Weather Reporting System is covered by sparse vegetation (37%), water (28%), bare soil (14%), and shrubs (11%), within 10 miles by shrubs (33%) and trees (26%), and within 50 miles by trees (53%) and shrubs (23%).

Data Sources

This report illustrates the typical weather at Osoyoos Automatic Weather Reporting System, 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

Osoyoos Automatic Weather Reporting System 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 Penticton Regional Airport; Omak Airport; Summerland Automatic Weather Reporting System; Kelowna International Airport; Princeton Automatic Weather Reporting System; Vernon, B. C.; Salmon Arm Automatic Weather Reporting System; and West Kootenay Regional 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.