N/A: How Much Sunshine each year is there in Oregon (in hours)? On the coldest nights, it can drop to 20 °F (-7 °C) or below at Portland. Most of the year, Portland gets its water from two reservoirs in the Bull Run Watershed resulting in water temperatures that vary throughout the year along with the seasons. The figure below presents a compact representation of key lunar data for 2020. In Portland, the summers are short, warm, dry, and mostly clear and the winters are very cold, wet, and overcast. precip. Check temperature, rainfall & sunshine averages & more in December 2020 in Portland, Oregon - USA . These average ocean temperatures for Portland are calculated from several years of archived data. Average monthly temperatures in Portland (degrees centigrade and fahrenheit) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec °C: 7: 9.8: 12.3: 14.9: 18.4: 22.1: 25.2: 25.5 The drier season lasts 5.1 months, from May 8 to October 12. On average, the recorded minimum temperature is 38°F. The most rain falls during the 31 days centered around November 28, with an average total accumulation of 9.4 inches. The average daily incident shortwave solar energy experiences extreme seasonal variation over the course of the year. Climate data and weather averages in Portland. 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. The day of the year with the warmest water is August 21, with an average temperature of 59°F. The number of hours during which the Sun is visible (black line). The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. The warm season lasts for 2.9 months, from June 22 to September 18, with an average daily high temperature above 76°F. Graphical Climatology of Portland, Oregon: Daily Temperatures and Rainfall, by Year (1875 – Present) The following is a graphical climatology of Portland, Oregon temperatures and precipitation, from 1875 into 2020. On average, the coolest month is December. Note that seasonal normals in contrast with those observed in Portland in the month of february with a maximum record of 67°F in 2015 and a minimum record of 16°F in 2014. In this report, we use a base of 50°F and a cap of 86°F. Seasonal Climate Forecast Dec. 2020 –Feb. What's The Average High Temp in Oregon? The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory. 2021 Issued: November 19, 2020 Contact: ODF Meteorologist Pete Parsons 503-945-7448 or peter.gj.parsons@oregon.gov The growing season in Portland typically lasts for 8.2 months (253 days), from around March 8 to around November 16, rarely starting before February 14 or after April 7, and rarely ending before October 24 or after December 14. The wind is most often from the east for 2.1 weeks, from January 20 to February 4 and for 2.6 weeks, from December 26 to January 13, with a peak percentage of 44% on January 27. The wind is most often from the south for 1.0 weeks, from January 13 to January 20; for 2.1 months, from February 4 to April 6; and for 2.7 months, from October 4 to December 26, with a peak percentage of 49% on November 17. Weather history for places in Oregon. The clearer part of the year in Portland begins around June 10 and lasts for 3.9 months, ending around October 6. Complete climate information for Portland, Oregon. Portland (/ ˈ p ɔːr t l ə n d /, PORT-lənd) is the largest and most populous city in the U.S. state of Oregon and the seat of Multnomah County.It is a major port in the Willamette Valley region of the Pacific Northwest, at the confluence of the Willamette and Columbia rivers in Northwestern Oregon. The Oregon Coast Range and Portland's inland location reduce the influence of the Pacific Ocean on its climate. Average precipitation in : Av. The earliest sunset is at 4:27 PM on December 9, and the latest sunset is 4 hours, 37 minutes later at 9:03 PM on June 25. 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. The length of the day in Portland varies significantly over the course of the year. Climate Data. The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds. We’ve collected seasonal averages for all seven regions of Oregon to give you an idea of what you can expect when you’re here. Portland summers are warm, dry, and sunny, with the average high temperature peaking at 81.1°F (27.3°C) in the warmest month of August. The shaded overlays indicate night and civil twilight. The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. 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. . Shortwave radiation includes visible light and ultraviolet radiation. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The mist brings us a lush green year around and an ideal climate for gardeners. Complete climate information for Portland, Oregon. The time of year with warmer water lasts for 3.3 months, from June 15 to September 24, with an average temperature above 57°F. Map showing location of Portland (43.661470, -70.255330) Locations nearby. The hottest day on record was July 2 1942 when the temperature hit 107.2°F. The average hourly temperature, color coded into bands. A climate chart for your city, indicating the monthly high temperatures and rainfall. MERRA-2 Modern-Era Retrospective Analysis. This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. There are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Portland. At right is a breakdown of 90-degree-or-hotter days by decade. In Portland, the summers are short, warm, dry, and mostly clear and the winters are very cold, wet, and overcast. Portland December weather guide. Max temperature: Average max daily (24h) temperature per month Minimum temperature: Average minimum daily (24h) temperature per month Average temperature: Average daily (24h) temperature per month. For a couple of days each year on average, Portland's daytime temperature doesn't climb above freezing. The darkest day of the year is December 25, with an average of 1.0 kWh. For the purposes of this report, the geographical coordinates of Portland are 45.523 deg latitude, -122.676 deg longitude, and 36 ft elevation. The months of January, February, March, November and December have a high chance of precipitation. We are looking back to the very beginnings of climate reporting in the Portland area, circa 1874. Also view: monthly average temperatures, precipitation, snow depth, wind speed, air quality and pollution. Snowfall in Oregon is greatest in the Cascade Range. The hottest day of the year is August 2, with an average high of 84°F and low of 58°F. Averages are for Portland International Airport, which is 7 miles from Portland. Climate in Oregon. The estimated value at Portland is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Portland and a given station. A climate graph showing rainfall, temperatures and normals. See the current Hillsdale, Portland, OR weather and a 5 day forecast. More: It’s not just your imagination. The Portland lies on 10m above sea level The climate here is mild, and generally warm and temperate. Portland, USA: Annual Weather Averages July is the hottest month in Portland with an average temperature of 20.5°C (69°F) and the coldest is January at -6°C (21°F) . The solar day over the course of the year 2020. The coldest month is January with an average maximum temperature of 7°C (44°F). The Oregon coast and the Willamette River Valley are blessed with a maritime climate similar to that of western France and northwestern Spain; verdant, fertile, moist and mild all year round. Laza, Spain (5,197 miles away) is the far-away foreign place with temperatures most similar to Portland (view comparison). Portland's average high temperature year-round is about 63 degrees F and its average low around 46 degrees F. It gets a yard or more of rain every year, from 36 to 44 inches… The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands. The smallest chance of a wet day is 4% on August 2. In the 2010s, Portland had 169 days at 90 or above, more than any other decade on record. Weather.com brings you the most accurate monthly weather forecast for with average/record and high/low temperatures, precipitation and more. 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. Portland Weather in August - Temperature, ... Below are average maximum temperatures at popular destinations in Oregon in … Coastal fog can occur during this time. Portland Temperature Yesterday. The transitions to and from daylight saving time are indicated by the 'DST' labels. They have daily highs averaging 43.9 °F (6.6 °C) and lows of 34.4 °F (1.3 °C). 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. Autumn in Portland is a delightful time to visit Portland, with warm days, a mild climate, clear skies and cool nights. December is the snowiest month in Portland with 0.9 inches of snow, and 3 months of the year have significant snowfall. The snowless period of the year lasts for 9.4 months, from February 16 to November 29. The darker period of the year lasts for 3.9 months, from October 25 to February 22, with an average daily incident shortwave energy per square meter below 2.3 kWh. The topography within 2 miles of Portland contains very significant variations in elevation, with a maximum elevation change of 866 feet and an average elevation above sea level of 161 feet. 56.3 °F: What's the Average Low in Oregon? The percentage of time spent at various humidity comfort levels, categorized by dew point. The rainless period of the year lasts for 4.1 weeks, from July 15 to August 13. A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. 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