The drier season lasts 5.1 months, from May 8 to October 12.
The wind is most often from the west for 5.9 months, from April 6 to October 4, with a peak percentage of 57% on August 6. The thin dotted line is the corresponding average liquid-equivalent snowfall. The darkest day of the year is December 25, with an average of 1.0 kWh. The percentage of time spent in various temperature bands. How would you rate the air quality in Portland? Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.
The least rain falls around July 28, with an average total accumulation of 0.4 inches. The clearer part of the year in Portland begins around June 10 and lasts for 3.9 months, ending around October 6. The windier part of the year lasts for 4.6 months, from October 28 to March 17, with average wind speeds of more than 5.3 miles per hour. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. 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 chance of a wet day peaks at 59% on November 26. The rainless period of the year lasts for 4.1 weeks, from July 15 to August 13.
Colder, drier snow tends to be on the higher end of that range and warmer, wetter snow on the lower end. Monthly averages Portland Longitude: -70.2553, Latitude: 43.6615 Average weather Portland, ME - 4101. In Portland, the summers are short, warm, dry, and mostly clear and the winters are very cold, wet, and overcast. The wettest month is September with an average of 140mm of rain.
Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. 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) . Heating Degree Days – The cumulative number of degrees in a month or year by which the mean temperature falls below 18.3°C/65°F. 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. Warm days, with a little rain here and there. Mean Temp: 47 °F. The least snow falls around July 18, with an average total liquid-equivalent accumulation of 0.0 inches. The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands. 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. We report snowfall in liquid-equivalent terms. Weather data is prone to errors, outages, and other defects. In fact, winter is mild enough, but not as in the Mediterranean climate, and rainfall is frequent for many months a year, but summer is warm to hot and sunny, albeit with quite cool nights. In Portland, the average percentage of the sky covered by clouds experiences extreme seasonal variation over the course of the year. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen.
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands. The numbers here describe what the weather in Portland, Oregon was like for every year since 2010. 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. From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night. All Year January February March April May June July August September October November December. The stations contributing to this reconstruction are: Portland International Airport (69%, 10 kilometers, northeast); Portland-Hillsboro Airport (20%, 21 kilometers, west); and Aurora State Airport (11%, 31 kilometers, south).
In Portland, the summers are short, warm, dry, and mostly clear and the winters are very cold, wet, and overcast. The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. The brightest day of the year is July 15, with an average of 7.3 kWh. The most pleasant months of the year for Portland are September, July and August. In Portland, there are 4 comfortable months with high temperatures in the range of 70-85°. We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. . The smallest chance of a wet day is 4% on August 2. 36.03 inch: Av.
Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC. The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands. Click here to create an account…, The highest monthly average temperature in, The lowest monthly average temperature in Portland for December is 40 degrees, The most monthly precipitation in Portland occurs in November with 6.2 inches, The air quality index in Portland is 24% better than the national average, The pollution index in Portland is 63% better than the national average. 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 calmer time of year lasts for 7.4 months, from March 17 to October 28. 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. Average weather, temperature, rainfall, sunshine hours The climate of Portland can be defined as oceanic with Mediterranean influences . The figure below shows you a compact characterization of the entire year of hourly average temperatures. In the 2010s, Portland had 169 days at 90 or above, more than any other decade on record. Portland, OR Weather History star_ratehome. We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. 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.
The shaded overlays indicate night and civil twilight. The cool season lasts for 3.3 months, from November 14 to February 22, with an average daily high temperature below 52°F. Good. The coldest day of the year is December 29, with an average low of 36°F and high of 45°F. 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. 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 beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. All Year January February March April May June July August September October November December. There is a small amount of pollution.
That's followed by how many really hot and cold days occurred each year.
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. Height about 8m/26 feet above sea level. 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 MERRA-2 Modern-Era Retrospective Analysis .
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 average water temperature experiences some seasonal variation over the course of the year. Portland average temperature. 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. The thin dotted lines are the corresponding average perceived temperatures. The area within 2 miles of Portland is covered by artificial surfaces (65%), water (19%), and trees (14%), within 10 miles by artificial surfaces (68%) and trees (12%), and within 50 miles by trees (47%) and shrubs (20%). annual snowfall: 4 inch
Mean Temp: 55 °F. 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 day of the year with the coolest water is February 14, with an average temperature of 49°F. 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.
To characterize how pleasant the weather is in Portland throughout the year, we compute two travel scores.
As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year.
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