Based on the tourism score, the best time of year to visit Portland for warm-weather activities is from early July to late August. Get the monthly weather forecast for Portland, OR, including daily high/low, historical averages, to help you plan ahead. The hottest day of the year is August 2, with an average high of 84°F and low of 58°F. precip. MERRA-2 Modern-Era Retrospective Analysis. Check temperature, rainfall & sunshine averages & more in November 2020 in Portland, Oregon - USA Oregon weather can be surprising â thatâs an understatement â but you donât have to let it catch you off-guard. Based on this score, the best time of year to visit Portland for general outdoor tourist activities is from early July to late August, with a peak score in the first week of August. Weather history for places in Oregon. 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. The wettest month is September with an average of 140mm of rain. A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. 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. This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. A climate chart for your city, indicating the monthly high temperatures and rainfall. 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 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. The day of the year with the warmest water is August 21, with an average temperature of 59°F. Portland, Oregon Climate - 97209 Weather, Average Rainfall, and Temperatures Summertime in Portland is from June through August, and this also features the driest weather. Parts of the metro area receive 64 plus inches per year fifteen inches more than Portlands official rainfall measurements, which are taken at the airport, one of the driest spots in town. The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds. These temperatures are far removed from those records observed in Portland in the month of december with a maximum record of 59°F in 2014 and a minimum record of 9°F in 2016. The thin dotted line is the corresponding average liquid-equivalent snowfall. N/A: How Much Sunshine each year is there in Oregon (in hours)? Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec; mm: 42 30 35 22 Over the course of the year, the temperature typically varies from 36°F to 84°F and is rarely below 26°F or above 95°F. US Dept of Commerce National Oceanic and Atmospheric Administration National Weather Service Portland, OR 5241 NE 122nd Avenue Portland, OR 97230-1089 Sign up for our email newsletter by entering your email address. On January 16, the cloudiest day of the year, the sky is overcast or mostly cloudy 76% of the time, and clear, mostly clear, or partly cloudy 24% of the time. Average Weather in Portland Oregon, United States. Check How Hot & Sunny It Is Before You Book Your Next Holiday in 2021 to Portland, Oregon - USA. The mist brings us a lush green year around and an ideal climate for gardeners. The snowy period of the year lasts for 2.6 months, from November 29 to February 16, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The wetter season lasts 6.9 months, from October 12 to May 8, with a greater than 32% chance of a given day being a wet day. The Oregon Coast Range and Portland's inland location reduce the influence of the Pacific Ocean on its climate. 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. Temperatures are up to 47°F. 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. The winters are rainier than the summers in Portland. 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. The least rain falls around July 28, with an average total accumulation of 0.4 inches. The average hourly wind speed in Portland experiences mild seasonal variation over the course of the year. The smallest chance of a wet day is 4% on August 2. Complete climate information for Portland, Oregon. Click on each chart for more information. : Hours of sunshine, Hi : Average high in ºF - Lo : Average low in ºF - Pre. The drier season lasts 5.1 months, from May 8 to October 12. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 58% on November 17. The Portland lies on 10m above sea level The climate here is mild, and generally warm and temperate. A series of tables gives data by year for temperature, precipitation and snowfall. 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. See the current Hillsdale, Portland, OR weather and a 5 day forecast. Also view: monthly average temperatures, precipitation, snow depth, wind speed, air quality and pollution. On average, the warmest month is July. : Days with precipitation - Hours sun. Map showing location of Portland (43.661470, -70.255330) Locations nearby. Seasonal Climate Forecast Dec. 2020 –Feb. 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. Annual Weather Averages Near Portland. Snowfall in Oregon is greatest in the Cascade Range. All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus. This section reports on the wide-area average surface temperature of that water. The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands. Find the best time to go to Portland (Oregon). On the coldest nights, it can drop to 20 °F (-7 °C) or below at Portland. 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. This report illustrates the typical weather in Portland, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016. The warmest month is July with an average maximum temperature of 26°C (78°F). The average water temperature experiences some seasonal variation over the course of the year. 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. The rainy period of the year lasts for 11 months, from August 13 to July 15, with a sliding 31-day rainfall of at least 0.5 inches. If interested in Portland's recent severe winter cold waves, click here. 24.7 °F: What's the Average Temperature in Oregon? December is the most wet month. The warmest month in Portland International, Portland, Oregon is August with an average high temperature of 81.4°F. Get the monthly weather forecast for Portland, OR, including daily high/low, historical averages, to help you plan ahead. Based on this score, the best time of year to visit Portland for hot-weather activities is from mid July to mid August, with a peak score in the first week of August. The least snow falls around July 18, with an average total liquid-equivalent accumulation of 0.0 inches. Time zones for airports and weather stations are provided by AskGeo.com . The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. Thus, the mean temperature average on this month of december in Portland is 43°F. The day of the year with the coolest water is February 14, with an average temperature of 49°F. The brightest day of the year is July 15, with an average of 7.3 kWh. 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. They have daily highs averaging 43.9 °F (6.6 °C) and lows of 34.4 °F (1.3 °C). Av. The calmer time of year lasts for 7.4 months, from March 17 to October 28. Weather Underground provides local & long-range weather forecasts, weatherreports, maps & tropical weather conditions for the Portland area. In Portland, there are 4 comfortable months with high temperatures in the range of 70-85°. But weather that cold doesn't happen here every year. The average daily incident shortwave solar energy experiences extreme seasonal variation over the course of the year. Within 50 miles contains very significant variations in elevation (11,161 feet). There are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Portland. Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory. The wettest month is September with an average of 140mm of rain. Note the image on the left and the dark green shows where the rainfall is the h… The darkest day of the year is December 25, with an average of 1.0 kWh. 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