Arlington, OR climate
Arlington has mild winters and warm summers, with very little rain. A typical July afternoon reaches 90°, a January night drops to 30°, and about 5 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Arlington feels like
Winter
Spring
Summer
Fall
Arlington weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 42° | 30° | 1.3" | 2.0" | 11 | 3 | 26° – 43° |
| February | 49° | 31° | 0.9" | 1.2" | 8 | 2 | 30° – 46° |
| March | 57° | 36° | 0.7" | 0.2" | 9 | 0 | 39° – 51° |
| April | 65° | 41° | 0.6" | 0 | 6 | 0 | 48° – 59° |
| May | 74° | 49° | 0.6" | 0 | 7 | 0 | 56° – 66° |
| June | 81° | 55° | 0.5" | 0 | 4 | 0 | 63° – 76° |
| July | 90° | 61° | 0.1" | 0 | 1 | 0 | 67° – 79° |
| August | 89° | 59° | 0.1" | 0 | 2 | 0 | 69° – 77° |
| September | 81° | 52° | 0.3" | 0 | 3 | 0 | 63° – 70° |
| October | 67° | 41° | 0.7" | 0.1" | 7 | 0 | 49° – 59° |
| November | 51° | 34° | 1.1" | 0.4" | 10 | 0 | 36° – 49° |
| December | 42° | 30° | 1.5" | 1.4" | 11 | 2 | 29° – 40° |
| Year | 66° | 43° | 8.4" | 5.3" | 77 | 7 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in Arlington
Arlington gets 8 inches of rain and melted snow a year. December is the wettest month and July the driest. Rain or snow falls on about 77 days a year. Snow covers the ground about 7 days of the year.
About 196 frost-free days a year
In half of years the last 32° night comes by April 6 and the first one by October 21. That leaves about 196 frost-free days for gardens, longer than 70% of U.S. towns.
Heating and cooling a home in Arlington
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Arlington, 83% of that work is heating and 17% is cooling, so the furnace matters far more than the air conditioner.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
How Arlington compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Warmer than it used to be
The last 30 years in Arlington averaged 1.8° warmer than the 1900s. The biggest change is in January (+4.4°). The shift is larger than in 88% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Arlington’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. January swings the most: between 1991 and 2020 its average temperature ranged from 26° to 43°. September is the most reliable, staying within 7°.
Common questions about Arlington’s climate
What is the coldest month in Arlington?
December, with a typical high of 42° and a low of 30°.
What is the hottest month in Arlington?
July, with a typical high of 90° and a low of 61°. About 46 days a year reach 90°.
How much snow does Arlington get?
About 5 inches in a normal winter, most of it in January.
When is the first frost in Arlington?
In half of years the first 32° night comes by October 21, and the last spring frost by April 6.
What is the rainiest month in Arlington?
December, with 1.5 inches of rain and melted snow. The year totals 8 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Arlington itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Arlington, OR (1 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.