Mill, OR climate
Mill has mild winters and pleasant summers, with plenty of rain. A typical July afternoon reaches 80°, a January night drops to 33°, and about 16 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Mill feels like
Winter
Spring
Summer
Fall
Mill 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 | 45° | 33° | 9.7" | 3.6" | 18 | 3 | 33° – 45° |
| February | 49° | 33° | 7.5" | 3.9" | 18 | 3 | 34° – 47° |
| March | 53° | 35° | 8.4" | 4.4" | 21 | 2 | 40° – 50° |
| April | 58° | 38° | 6.8" | 0.4" | 19 | 0 | 43° – 53° |
| May | 66° | 43° | 4.8" | 0 | 15 | 0 | 49° – 60° |
| June | 71° | 47° | 3.2" | 0 | 11 | 0 | 55° – 66° |
| July | 80° | 51° | 0.8" | 0 | 4 | 0 | 58° – 69° |
| August | 80° | 50° | 0.9" | 0 | 4 | 0 | 61° – 70° |
| September | 74° | 46° | 2.7" | 0 | 8 | 0 | 56° – 63° |
| October | 61° | 40° | 6.5" | 0 | 16 | 0 | 46° – 57° |
| November | 50° | 36° | 10.4" | 0.2" | 20 | 0 | 37° – 47° |
| December | 43° | 33° | 11.3" | 3.5" | 20 | 3 | 33° – 41° |
| Year | 61° | 40° | 73.0" | 16.0" | 173 | 11 |
“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 Mill
Mill gets 73 inches of rain and melted snow a year. December is the wettest month and July the driest. Rain or snow falls on about 173 days a year. Snow covers the ground about 11 days of the year.
About 184 frost-free days a year
In half of years the last 32° night comes by April 26 and the first one by October 24. That leaves about 184 frost-free days for gardens, longer than 57% of U.S. towns.
Heating and cooling a home in Mill
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Mill, 97% of that work is heating and 3% 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 Mill 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 Mill averaged 1.2° warmer than the 1900s. The biggest change is in January (+2.8°). The shift is smaller than in 52% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Mill’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. February swings the most: between 1991 and 2020 its average temperature ranged from 34° to 47°. September is the most reliable, staying within 7°.
Common questions about Mill’s climate
What is the coldest month in Mill?
December, with a typical high of 43° and a low of 33°.
What is the hottest month in Mill?
August, with a typical high of 80° and a low of 50°. About 13 days a year reach 90°.
How much snow does Mill get?
About 16 inches in a normal winter, most of it in March.
When is the first frost in Mill?
In half of years the first 32° night comes by October 24, and the last spring frost by April 26.
What is the rainiest month in Mill?
December, with 11.3 inches of rain and melted snow. The year totals 73 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Mill itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Stayton 6 Ene, OR (12 mi, snow) and Lacomb 3 Nne, OR (15 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.