Betwixt and between the Willamette River and its confluence with the Columbia River stands Portland, Oregon, known as “The City of Roses.” The nickname, having originated during the 1905 Lewis and Clark centennial exposition, was given due to its ideal climate for growing roses. All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book,

In Portland, the average percentage of the sky covered by clouds experiences Portland experiences Daylight saving time (DST) is observed in Portland during 2020, starting in the spring on We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. 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). All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Average Weather in Portland Oregon, United States. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. The greatest amount of precipitation occurs in December, with an average of 162 mm | 6.4 inch.At an average temperature of 20.0 °C | 68.0 °F, July is the hottest month of the year.
The solar day over the course of the year 2020. Weather data is prone to errors, outages, and other defects. Climate Data.

The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than The thin dotted line is the corresponding average liquid-equivalent snowfall. The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands. 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. 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.
Shortwave radiation includes visible light and ultraviolet radiation. Portland experiences 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. 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. Colder, drier snow tends to be on the higher end of that range and warmer, wetter snow on the lower end. Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC. Over the course of the year, the temperature typically varies from The average hourly wind speed in Portland experiences The numbers are for the total amount of snow and for how many days it snows at least 0.1 inches (0.25 centimetres). For the purposes of this report, the geographical coordinates of Portland are 45.523 deg latitude, -122.676 deg longitude, and 161 ft elevation. Portland climate summary The Portland lies on 10m above sea level The climate here is mild, and generally warm and temperate. History of Portland, Oregon. Portland is located near a large body of water (e.g., ocean, sea, or large lake). Precipitation is the lowest in July, with an average of 17 mm | 0.7 inch.

The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands.

The lowest average temperatures in the year occur in January, when it is around 4.3 °C | 39.7 °F.Between the driest and wettest months, the difference in precipitation is 145 mm | 6 inch. The variation in temperatures throughout the year is 15.7 °C | 60.3 °F. This location is classified as Csb by Köppen and Geiger. 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 average daily incident shortwave solar energy experiences The growing season in Portland typically lasts for But areas south of Portland fared much better in regards to the historic snowfall, with Tualatin, West Linn and Oregon City receiving around 3-6 inches of snow. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The black line is the percentage chance that a given day is within the growing season. In contrast to Portland, nearby Forest Grove was really clobbered by heavy snowfall--- a single 48 hour period (Dec. 9-10) saw 25 inches of snow fall-- dry, light stuff, and then temperatures went sub-zero for four days, as low as 15 below! Portland Weather History for the Previous 24 Hours Show weather for: Previous 24 hours August 8, 2020 August 7, 2020 August 6, 2020 August 5, 2020 August 4, 2020 August 3, 2020 August 2, 2020 August 1, 2020 July 31, 2020 July 30, 2020 July 29, 2020 July 28, 2020 July … We report snowfall in liquid-equivalent terms. Daily Oregon HAM Radio Operators Weather Report; Daily Temps/Precip/Snowfall: Portland ( 1940-2019, csv file) Daily Temps/Precip/Snowfall: Astoria ( 1892-2019, csv file) Daily Tems/Precip/Snowfall: Eugene ( 1892-2019, csv file) Daily Temps/Precip/Snowfall: Salem ( 1892-2019, csv file) More Historical Climate Data; Local Climate Studies. We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body.


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