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Average Weather in Sunriver Oregon, United States

In Sunriver, the summers are short, warm, dry, and mostly clear and the winters are very cold, wet, and partly cloudy. Over the course of the year, the temperature typically varies from 23°F to 81°F and is rarely below 10°F or above 90°F.

Climate Summary

83%83%35%35%clearovercastprecipitation: 4.5 inprecipitation: 4.5 in0.3 in0.3 inmuggy: 0%muggy: 0%drydryvery coldcoldcoolwarmcoolcoldvery coldtourism score: 5.6tourism score: 5.60.00.0JanFebMarAprMayJunJulAugSepOctNovDec
Click on each chart for more information.

Based on the tourism score, the best time of year to visit Sunriver for warm-weather activities is from mid July to mid August.

Temperature

The warm season lasts for 2.7 months, from June 22 to September 12, with an average daily high temperature above 72°F. The hottest day of the year is August 3, with an average high of 81°F and low of 50°F.

The cold season lasts for 3.7 months, from November 13 to March 3, with an average daily high temperature below 46°F. The coldest day of the year is December 23, with an average low of 23°F and high of 37°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 in SunriverJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMcoldcoolwarmfreezingvery coldcomfortable
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.

Clouds

In Sunriver, 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 in Sunriver begins around June 15 and lasts for 3.7 months, ending around October 5. On July 28, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 83% of the time, and overcast or mostly cloudy 17% of the time.

The cloudier part of the year begins around October 5 and lasts for 8.3 months, ending around June 15. On January 16, 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 in SunriverclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jul 2883%Jul 2883%Jan 1635%Jan 1635%Jun 1559%Jun 1559%Oct 559%Oct 559%partly cloudyclearovercastmostly clearmostly cloudy
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 in Sunriver varies significantly throughout the year.

The wetter season lasts 6.1 months, from October 21 to April 24, with a greater than 26% chance of a given day being a wet day. The chance of a wet day peaks at 46% on November 27.

The drier season lasts 5.9 months, from April 24 to October 21. The smallest chance of a wet day is 5% on August 5.

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 31% on November 10.

Daily Chance of Precipitation

Daily Chance of Precipitation in SunriverwetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Nov 2746%Nov 2746%Aug 55%Aug 55%Oct 2126%Oct 2126%Apr 2426%Apr 2426%mixedrainsnow
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. Sunriver experiences significant seasonal variation in monthly rainfall.

The rainy period of the year lasts for 10 months, from September 3 to July 6, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around November 23, with an average total accumulation of 3.5 inches.

The rainless period of the year lasts for 1.9 months, from July 6 to September 3. The least rain falls around August 2, with an average total accumulation of 0.3 inches.

Average Monthly Rainfall

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. Sunriver experiences significant seasonal variation in monthly liquid-equivalent snowfall.

The snowy period of the year lasts for 5.9 months, from October 20 to April 16, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around December 20, with an average total liquid-equivalent accumulation of 1.2 inches.

The snowless period of the year lasts for 6.1 months, from April 16 to October 20. The least snow falls around August 2, with an average total liquid-equivalent accumulation of 0.0 inches.

Average Liquid-Equivalent Monthly Snowfall

Average Liquid-Equivalent Monthly Snowfall in SunriversnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0.0 in0.5 in1.0 in1.5 in2.0 in2.5 in3.0 in3.5 in4.0 inDec 201.2 inDec 201.2 inAug 20.0 inAug 20.0 inOct 200.1 inOct 200.1 inApr 160.1 inApr 160.1 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 in Sunriver 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 20, with 15 hours, 28 minutes of daylight.

Hours of Daylight and Twilight

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 5:22 AM on June 14, and the latest sunrise is 2 hours, 24 minutes later at 7:46 AM on November 4. The earliest sunset is at 4:27 PM on December 9, and the latest sunset is 4 hours, 24 minutes later at 8:52 PM on June 26.

Daylight saving time (DST) is observed in Sunriver 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 in SunriverJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 145:22 AMJun 145:22 AM8:52 PMJun 268:52 PMJun 26Dec 94:27 PMDec 94:27 PM7:46 AMNov 47:46 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.

The perceived humidity level in Sunriver, 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 in SunriverJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Jul 30%Jul 30%drydry
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 in Sunriver experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 6.6 months, from October 22 to May 11, with average wind speeds of more than 5.9 miles per hour. The windiest day of the year is December 1, with an average hourly wind speed of 7.2 miles per hour.

The calmer time of year lasts for 5.4 months, from May 11 to October 22. The calmest day of the year is August 3, with an average hourly wind speed of 4.6 miles per hour.

Average Wind Speed

Average Wind Speed in SunriverwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph1 mph2 mph3 mph4 mph5 mph6 mph7 mph8 mph9 mph10 mph11 mphDec 17.2 mphDec 17.2 mphAug 34.6 mphAug 34.6 mphOct 225.9 mphOct 225.9 mphMay 115.9 mphMay 115.9 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 in Sunriver varies throughout the year.

The wind is most often from the west for 7.1 months, from March 13 to October 17, with a peak percentage of 51% on June 4. The wind is most often from the south for 4.9 months, from October 17 to March 13, with a peak percentage of 58% on January 1.

Wind Direction

Wind Direction in SunriverSWSJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%westnorthsoutheast
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 in Sunriver 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 Sunriver for general outdoor tourist activities is from mid July to mid August, with a peak score in the last week of July.

Tourism Score

Tourism Score in SunriverJanFebMarAprMayJunJulAugSepOctNovDec02468105.65.60.00.0precipitationprecipitationcloudscloudstemperaturetemperaturetourism 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 Sunriver for hot-weather activities is from mid July to mid August, with a peak score in the last week of July.

Beach/Pool Score

Beach/Pool Score in SunriverJanFebMarAprMayJunJulAugSepOctNovDec02468102.52.50.00.0 precipitationprecipitationcloudscloudstemperaturetemperature
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 in Sunriver typically lasts for 3.4 months (105 days), from around June 9 to around September 21, rarely starting before May 18 or after June 29, and rarely ending before September 3 or after October 12.

Time Spent in Various Temperature Bands and the Growing Season

Time Spent in Various Temperature Bands and the Growing Season in Sunrivergrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jun 950%Jun 950%Sep 2150%Sep 2150%Jun 2990%Jun 2990%Sep 390%Sep 390%May 1810%May 1810%Oct 1210%Oct 1210%0%Dec 70%Dec 7Jul 30100%Jul 30100%very coldcoolcoldfreezingcomfortablefrigid
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 in Sunriver should appear around May 9, only rarely appearing before April 22 or after May 29.

Growing Degree Days

Growing Degree Days in SunriverJanFebMarAprMayJunJulAugSepOctNovDec0°F200°F400°F600°F800°F1,000°F1,200°F1,400°F1,600°F1,800°FMay 990°FMay 990°FAug 3900°FAug 3900°FDec 311,612°FDec 311,612°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 3.3 months, from May 15 to August 24, with an average daily incident shortwave energy per square meter above 6.7 kWh. The brightest day of the year is July 14, with an average of 8.0 kWh.

The darker period of the year lasts for 3.6 months, from October 28 to February 16, with an average daily incident shortwave energy per square meter below 2.8 kWh. The darkest day of the year is December 15, with an average of 1.5 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy in SunriverbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWh9 kWh10 kWhJul 148.0 kWhJul 148.0 kWhDec 151.5 kWhDec 151.5 kWhMay 156.7 kWhMay 156.7 kWhAug 246.7 kWhAug 246.7 kWhOct 282.8 kWhOct 282.8 kWhFeb 162.8 kWhFeb 162.8 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 Sunriver are 43.884 deg latitude, -121.439 deg longitude, and 4,255 ft elevation.

The topography within 2 miles of Sunriver contains only modest variations in elevation, with a maximum elevation change of 344 feet and an average elevation above sea level of 4,225 feet. Within 10 miles contains only modest variations in elevation (2,356 feet). Within 50 miles contains large variations in elevation (9,308 feet).

The area within 2 miles of Sunriver is covered by trees (55%) and shrubs (42%), within 10 miles by trees (66%) and shrubs (29%), and within 50 miles by shrubs (53%) and trees (42%).

Data Sources

This report illustrates the typical weather in Sunriver, 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 5 weather stations near enough to contribute to our estimation of the temperature and dew point in Sunriver.

For each station, the records are corrected for the elevation difference between that station and Sunriver 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 Sunriver is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Sunriver and a given station.

The stations contributing to this reconstruction are: Bend Municipal Airport (74%, 30 kilometers, northeast); Mahlon Sweet Field Airport (7%, 145 kilometers, west); McNary Field (6%, 168 kilometers, northwest); Roseburg Municipal Airport (6%, 170 kilometers, southwest); and Klamath Falls Airport (7%, 195 kilometers, south).

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.