1. WeatherSpark.com
  2. United States
  3. Oregon
  4. Southwest Oregon Regional Airport

Average Weather at Southwest Oregon Regional Airport Oregon, United States

At Southwest Oregon Regional Airport, the summers are comfortable, dry, and mostly clear and the winters are cold, wet, windy, and mostly cloudy. Over the course of the year, the temperature typically varies from 41°F to 67°F and is rarely below 32°F or above 73°F.

Climate Summary

coldcoolcomfortablecoolcoldJanFebMarAprMayJunJulAugSepOctNovDec84%84%27%27%clearovercastprecipitation: 9.6 inprecipitation: 9.6 in0.2 in0.2 inmuggy: 0%muggy: 0%0%0%drydrytourism score: 6.1tourism score: 6.10.40.4
Click on each chart for more information.

Based on the tourism score, the best time of year to visit Southwest Oregon Regional Airport for warm-weather activities is from early July to late August.

Temperature

The warm season lasts for 3.5 months, from June 22 to October 8, with an average daily high temperature above 64°F. The hottest day of the year is August 25, with an average high of 67°F and low of 53°F.

The cool season lasts for 3.5 months, from November 24 to March 6, with an average daily high temperature below 55°F. The coldest day of the year is December 21, with an average low of 41°F and high of 52°F.

Average High and Low Temperature

Average High and Low Temperature at Southwest Oregon Regional AirportwarmcoolcoolJanFebMarAprMayJunJulAugSepOctNovDec0°F10°F20°F30°F40°F50°F60°F70°F80°F90°F100°FDec 2152°FDec 2152°FAug 2567°FAug 2567°F41°F41°F53°F53°FJun 2264°FJun 2264°FOct 864°FOct 864°FMar 655°FMar 655°F52°F52°F49°F49°F43°F43°F43°F43°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 Southwest Oregon Regional AirportJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMvery coldcoldcoolcoolvery coldvery coldvery 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.

Cygnet, Australia (8,110 miles away) is the far-away foreign place with temperatures most similar to Southwest Oregon Regional Airport (view comparison).

Clouds

At Southwest Oregon Regional Airport, the average percentage of the sky covered by clouds experiences extreme seasonal variation over the course of the year.

The clearer part of the year at Southwest Oregon Regional Airport begins around June 12 and lasts for 4.0 months, ending around October 10. On August 3, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 84% of the time, and overcast or mostly cloudy 16% of the time.

The cloudier part of the year begins around October 10 and lasts for 8.0 months, ending around June 12. On December 27, the cloudiest day of the year, the sky is overcast or mostly cloudy 73% of the time, and clear, mostly clear, or partly cloudy 27% of the time.

Cloud Cover Categories

Cloud Cover Categories at Southwest Oregon Regional AirportclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Aug 384%Aug 384%Dec 2727%Dec 2727%Jun 1255%Jun 1255%Oct 1056%Oct 1056%clearmostly cloudyovercastpartly cloudymostly 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 Southwest Oregon Regional Airport varies very significantly throughout the year.

The wetter season lasts 6.3 months, from October 18 to April 27, with a greater than 29% chance of a given day being a wet day. The chance of a wet day peaks at 57% on December 1.

The drier season lasts 5.7 months, from April 27 to October 18. The smallest chance of a wet day is 2% on August 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 throughout the year is rain alone, with a peak probability of 57% on December 1.

Daily Chance of Precipitation

Daily Chance of Precipitation at Southwest Oregon Regional AirportwetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Dec 157%Dec 157%Aug 32%Aug 32%Oct 1829%Oct 1829%Apr 2729%Apr 2729%rain
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. Southwest Oregon Regional Airport experiences extreme seasonal variation in monthly rainfall.

The rainy period of the year lasts for 10 months, from August 28 to July 2, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around December 5, with an average total accumulation of 9.5 inches.

The rainless period of the year lasts for 1.8 months, from July 2 to August 28. The least rain falls around July 30, with an average total accumulation of 0.2 inches.

Average Monthly Rainfall

Average Monthly Rainfall at Southwest Oregon Regional AirportrainrainJanFebMarAprMayJunJulAugSepOctNovDec0 in5 in10 in15 inDec 59.5 inDec 59.5 inJul 300.2 inJul 300.2 inAug 280.5 inAug 280.5 inJul 20.5 inJul 20.5 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.

Sun

The length of the day at Southwest Oregon Regional Airport varies significantly over the course of the year. In 2018, the shortest day is December 21, with 8 hours, 57 minutes of daylight; the longest day is June 21, with 15 hours, 25 minutes of daylight.

Hours of Daylight and Twilight

Hours of Daylight and Twilight at Southwest Oregon Regional AirportJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 7 minMar 2012 hr, 7 minMar 2015 hr, 25 minJun 2115 hr, 25 minJun 2112 hr, 10 minSep 2212 hr, 10 minSep 228 hr, 57 minDec 218 hr, 57 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 5:35 AM on June 15, and the latest sunrise is 2 hours, 19 minutes later at 7:55 AM on November 3. The earliest sunset is at 4:40 PM on December 9, and the latest sunset is 4 hours, 21 minutes later at 9:01 PM on June 26.

Daylight saving time (DST) is observed at Southwest Oregon Regional 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

Sunrise & Sunset with Twilight and Daylight Saving Time at Southwest Oregon Regional AirportJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 155:35 AMJun 155:35 AM9:01 PMJun 269:01 PMJun 26Dec 94:40 PMDec 94:40 PM7:55 AMNov 37:55 AMNov 3Mar 11DSTMar 11DSTDSTNov 4DSTNov 4daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunset
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 Southwest Oregon Regional Airport, 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 Southwest Oregon Regional AirportJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Feb 90%Feb 90%Jul 50%Jul 50%comfortablecomfortabledrydryhumidhumid
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 Southwest Oregon Regional Airport experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 4.9 months, from November 4 to April 1, with average wind speeds of more than 8.6 miles per hour. The windiest day of the year is December 4, with an average hourly wind speed of 9.9 miles per hour.

The calmer time of year lasts for 7.1 months, from April 1 to November 4. The calmest day of the year is September 28, with an average hourly wind speed of 7.2 miles per hour.

Average Wind Speed

Average Wind Speed at Southwest Oregon Regional AirportwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph2 mph4 mph6 mph8 mph10 mph12 mph14 mph16 mphDec 49.9 mphDec 49.9 mphSep 287.2 mphSep 287.2 mphApr 18.6 mphApr 18.6 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 Southwest Oregon Regional Airport varies throughout the year.

The wind is most often from the north for 6.5 months, from April 6 to October 20, with a peak percentage of 77% on July 29. The wind is most often from the south for 5.5 months, from October 20 to April 6, with a peak percentage of 47% on January 1.

Wind Direction

Wind Direction at Southwest Oregon Regional AirportSNSJanFebMarAprMayJunJulAugSepOctNovDec0%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).

Water Temperature

Southwest Oregon Regional 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 some seasonal variation over the course of the year.

The time of year with warmer water lasts for 3.3 months, from June 19 to September 29, with an average temperature above 55°F. The day of the year with the warmest water is August 25, with an average temperature of 57°F.

The time of year with cooler water lasts for 4.2 months, from December 15 to April 20, with an average temperature below 52°F. The day of the year with the coolest water is February 12, with an average temperature of 50°F.

Average Water Temperature

Average Water Temperature at Southwest Oregon Regional AirportwarmcoolJanFebMarAprMayJunJulAugSepOctNovDec46°F48°F50°F52°F54°F56°F58°F60°F62°FAug 2557°FAug 2557°F50°FFeb 1250°FFeb 12Jun 1955°FJun 1955°FSep 2955°FSep 2955°FDec 1552°FDec 1552°FApr 2052°FApr 2052°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 Southwest Oregon Regional 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 Southwest Oregon Regional Airport for general outdoor tourist activities is from early July to late August, with a peak score in the first week of August.

Tourism Score

Tourism Score at Southwest Oregon Regional Airportbest timeJanFebMarAprMayJunJulAugSepOctNovDec02468106.16.10.40.4 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 Southwest Oregon Regional Airport for hot-weather activities is from mid August to early September, with a peak score in the last week of August.

Beach/Pool Score

Beach/Pool Score at Southwest Oregon Regional AirportJanFebMarAprMayJunJulAugSepOctNovDec02468100.50.50.00.0precipitationprecipitationcloudscloudstemperaturetemperature
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 Southwest Oregon Regional Airport typically lasts for 9.8 months (296 days), from around February 14 to around December 7, rarely starting after March 16, or ending before November 6.

Time Spent in Various Temperature Bands and the Growing Season

Time Spent in Various Temperature Bands and the Growing Season at Southwest Oregon Regional Airportgrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Feb 1450%Feb 1450%Dec 750%Dec 790%Mar 1690%Mar 1690%Nov 690%Nov 623%Jan 323%Jan 3Jul 17100%Jul 17100%very coldcoldcoolcomfortable
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 Southwest Oregon Regional Airport should appear around March 15, only rarely appearing before February 15 or after April 25.

Growing Degree Days

Growing Degree Days at Southwest Oregon Regional AirportJanFebMarAprMayJunJulAugSepOctNovDec0°F200°F400°F600°F800°F1,000°F1,200°F1,400°F1,600°F1,800°FMar 1590°FMar 1590°FAug 11900°FAug 11900°FDec 311,588°FDec 311,588°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 2.9 months, from May 28 to August 25, with an average daily incident shortwave energy per square meter above 6.3 kWh. The brightest day of the year is July 16, with an average of 7.6 kWh.

The darker period of the year lasts for 3.9 months, from October 28 to February 24, with an average daily incident shortwave energy per square meter below 2.5 kWh. The darkest day of the year is December 26, with an average of 1.2 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy at Southwest Oregon Regional AirportbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWh9 kWhJul 167.6 kWhJul 167.6 kWhDec 261.2 kWhDec 261.2 kWhMay 286.3 kWhMay 286.3 kWhAug 256.3 kWhAug 256.3 kWhOct 282.5 kWhOct 282.5 kWhFeb 242.5 kWhFeb 242.5 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 Southwest Oregon Regional Airport are 43.417 deg latitude, -124.244 deg longitude, and 20 ft elevation.

The topography within 2 miles of Southwest Oregon Regional Airport contains only modest variations in elevation, with a maximum elevation change of 240 feet and an average elevation above sea level of 31 feet. Within 10 miles contains only modest variations in elevation (1,407 feet). Within 50 miles contains very significant variations in elevation (4,285 feet).

The area within 2 miles of Southwest Oregon Regional Airport is covered by herbaceous vegetation (53%), water (30%), and artificial surfaces (17%), within 10 miles by trees (37%) and water (35%), and within 50 miles by water (46%) and trees (38%).

Data Sources

This report illustrates the typical weather at Southwest Oregon Regional 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

Southwest Oregon Regional 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 are Roseburg Municipal Airport, Newport Municipal Airport, Sexton Summit,, Mahlon Sweet Field Airport, Brookings Airport, Corvallis Municipal Airport, Rogue Valley International - Medford Airport, and McNary Field.

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.