Climate data and weather averages in Portland. This month, it has already rained 5.67 inches, says Colby Neuman, a meteorologist with the National Weather Service. Rainfall. The annual rainfall of 48.9 inches in Portland means that it is about average compared to other places in Maine. Additional Info Items of Interest Education Resources Other Useful Links COOP Observer. Station Data. The average water-equivalent precipitation is 37.5 inches (950 mm) per year in downtown Portland and 42.1 inches at the airport. In fact, it's the rainiest month Portland has seen in more than two years. The rainy period of the year lasts for 11 months, from August 14 to July 16, with a sliding 31-day rainfall of at least 0.5 inches. This month, Portland could see record rainfall for September. Precipitation. Skip section menu. Maximums and minimums are only part of the temperature picture. The Puget Sound Convergence Zone is an important feature of Seattle's weather. Monthly Precipitation Summary Water Year 2021. Hillsboro (/ ˈ h ɪ l z b ər oʊ /) is the fifth-largest city in the U.S. state of Oregon and is the county seat of Washington County. To fill in the rest, there's information on how many days a month get above or below a given temperature. Mean Temperature: 41.6 °F. Average rainfall for the month and year are in the far right column. Based on weather reports collected during 1985–2015. This climate is considered to be Cfb according to the Köppen-Geiger climate classification. In the convergence zone, air arriving from the north meets air flowing in from the south. December is the wettest month in Portland with 6.8 inches of rain, and the driest month is July with 0.7 inches. Monthly Weather-Portland, OR. PORTLAND, Ore. (KOIN) – A reminder that December is our second wettest month of the year on average, so do not let this dry weather fool you! The calendar year is not used for rainfall. In practice, however, much more goes into NCEI's Climate Normals product than simple 30-year averages. Published September 19, 2019 . A storm that drops half an inch or more rain in a day occurs during this month only about once a decade. Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. Month * Day * Data is available up to March 16, 2021. These facts were obtained from The Oregon Weather Book by George Taylor and Raymond R. Hatton, Oregon State University Press, ISBN 0-87071-467-8 except for the single-month record which happened after the book was published. Get the monthly weather forecast for Portland, OR, including daily high/low, historical averages, to help you plan ahead. Apr. Even the driest month still has a lot of rainfall. Rainfall tables - select location and period . More detailed data for individual sites can be obtained by contacting the Bureau. The months of May, June and December have a high chance of precipitation. Current Month Charts and Tables; Calendar Year Chart; Water Year Chart; Previous Monthly Charts and Tables Follow us on Twitter Follow us on Facebook Follow us on YouTube PQR RSS Feed Safety Weather Radio Lightning Safety Tsunami Ready Storm Ready SkyWarn. Monthly: 1981-2010 normals History: 2007-2019 The annual rainfall of 42.8 inches in Portland means that it is about average compared to other places in Oregon. Portland experiences extreme seasonal variation in monthly rainfall. Period. long story short, it does rain here but it’s often dreary and mists instead of torrential down pour so we don’t have the highest amount of actual rain. Portland's coldest month is January when the average temperature overnight is 12.5°F. The number of years (provided in the 2nd last column of the table) may differ between elements if the observing program at the site changed. The rainfall here is around 1114 mm | 43.9 inch per year. The water year starts on October 1 and ends on September 30. May in Maine is the month that feels decidedly “spring” to me. Procedures are put in place to deal with missing and suspect data values. A climate graph showing rainfall, temperatures and normals. The month of January 1950 was particularly severe, bringing 57.2 in (145 cm) of snow, the most of any month along with the aforementioned record cold. Lying in the Tualatin Valley on the west side of the Portland metropolitan area, the city hosts many high-technology companies, such as Intel, that comprise what has become known as the Silicon Forest.At the 2010 Census, the city's population was 91,611. The average high and low temperatures are listed below monthly and annually for Portland, in both degrees Fahrenheit and Celsius. June is the most wet month. Agriculture Services. You are about to report this weather station for bad data. The most rain falls during the 31 days centered around November 29, with an average total accumulation of 9.4 inches. The warmest month is August with an average maximum temperature of 23°C (73°F). A thunderstorm happens in most, but not all, Julys. https://www.weather-atlas.com/en/oregon-usa/portland-climate Precipitation data is provided for each month of the most recent water year, total precipitation for the water year, the percent of normal … About rainfall tables. The average annual temperature in Auckland is 15.5 °C | 59.9 °F. 2020 Monthly Precipitation Maps . US Dept of Commerce National Oceanic and Atmospheric Administration National Weather Service Wakefield, VA 10009 General Mahone Highway Wakefield, VA 23888 Portland experiences extreme seasonal variation in monthly rainfall can be obtained by contacting the Bureau temperature picture | 68.8,... The daily observations of minimum temperature for the month that feels decidedly “ Spring ” me... 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