Skip to content
VSWeather

West Slope, OR weather and climate

Washington County, OR · population 6,985 · about 282 ft elevation

Everything below is a 30 year average for 1991-2020, computed from daily climate history at West Slope's own coordinates.

The year at a glance

Sunny days
160
clear or partly cloudy, per year
Precipitation
48 in
per year
Wet days
143
rain or snow per year
Snowfall
6 in
per year
Hot days
14
above 90 °F
Freezing nights
22
at or below 32 °F
Humidity
75%
average relative
Average temperature
55 °F
year round

Monthly temperatures

Average daily high and low for each month, in °F.

Daily highDaily low
406080JanMarMayJulSepNovDaily high, Jan: 49 °FDaily high, Feb: 53 °FDaily high, Mar: 57 °FDaily high, Apr: 63 °FDaily high, May: 69 °FDaily high, Jun: 74 °FDaily high, Jul: 81 °FDaily high, Aug: 82 °FDaily high, Sep: 76 °FDaily high, Oct: 64 °FDaily high, Nov: 54 °FDaily high, Dec: 48 °FDaily low, Jan: 38 °FDaily low, Feb: 38 °FDaily low, Mar: 40 °FDaily low, Apr: 43 °FDaily low, May: 48 °FDaily low, Jun: 52 °FDaily low, Jul: 56 °FDaily low, Aug: 56 °FDaily low, Sep: 52 °FDaily low, Oct: 46 °FDaily low, Nov: 41 °FDaily low, Dec: 37 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Daily high495357636974818276645448
Daily low383840434852565652464137

Monthly precipitation

Total rain plus melted snow for each month, in inches.

0.02.55.07.5JanMarMayJulSepNovWest Slope, Jan: 6.6 inWest Slope, Feb: 5.1 inWest Slope, Mar: 5.7 inWest Slope, Apr: 4.5 inWest Slope, May: 2.8 inWest Slope, Jun: 1.7 inWest Slope, Jul: 0.5 inWest Slope, Aug: 0.6 inWest Slope, Sep: 1.6 inWest Slope, Oct: 4.2 inWest Slope, Nov: 6.9 inWest Slope, Dec: 7.6 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
West Slope6.65.15.74.52.81.70.50.61.64.26.97.6

Monthly sunny days

Days each month with clear or partly cloudy skies.

01020JanMarMayJulSepNovWest Slope, Jan: 7 daysWest Slope, Feb: 8 daysWest Slope, Mar: 8 daysWest Slope, Apr: 9 daysWest Slope, May: 13 daysWest Slope, Jun: 15 daysWest Slope, Jul: 24 daysWest Slope, Aug: 25 daysWest Slope, Sep: 21 daysWest Slope, Oct: 15 daysWest Slope, Nov: 8 daysWest Slope, Dec: 7 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
West Slope788913152425211587

Compare West Slope with another city

Nearby cities and popular picks. Any two cities can be compared from the home page.

See weather for every covered Oregon city

About this data

Figures are 30 year averages for 1991-2020. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.

Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).