San Marine, OR climate
San Marine has mild winters and cool summers, with plenty of rain. A typical July afternoon reaches 67°, a January night drops to 40°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in San Marine feels like
Winter
Spring
Summer
Fall
San Marine 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 | 51° | 40° | 12.6" | 0.3" | 18 | 0 | 40° – 51° |
| February | 52° | 39° | 9.6" | 0.4" | 17 | 0 | 39° – 52° |
| March | 54° | 39° | 10.0" | 0 | 20 | 0 | 43° – 53° |
| April | 56° | 41° | 6.7" | 0 | 17 | 0 | 45° – 54° |
| May | 61° | 45° | 4.0" | 0 | 12 | 0 | 48° – 58° |
| June | 64° | 49° | 2.5" | 0 | 10 | 0 | 53° – 61° |
| July | 67° | 51° | 0.6" | 0 | 5 | 0 | 55° – 62° |
| August | 68° | 52° | 0.8" | 0 | 5 | 0 | 58° – 64° |
| September | 67° | 50° | 2.2" | 0 | 7 | 0 | 55° – 62° |
| October | 61° | 46° | 6.8" | 0 | 13 | 0 | 51° – 58° |
| November | 55° | 42° | 11.8" | 0 | 19 | 0 | 43° – 53° |
| December | 50° | 39° | 14.1" | 0.2" | 19 | 0 | 40° – 48° |
| Year | 59° | 44° | 81.8" | 0.9" | 161 | 1 |
“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 San Marine
San Marine gets 82 inches of rain and melted snow a year. December is the wettest month and July the driest. Rain or snow falls on about 161 days a year.
About 303 frost-free days a year
In half of years the last 32° night comes by February 19 and the first one by December 11. That leaves about 303 frost-free days for gardens, longer than 95% of U.S. towns.
Heating and cooling a home in San Marine
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In San Marine, 100% of that work is heating and 0% 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 San Marine 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 San Marine averaged 0.9° warmer than the 1900s. The biggest change is in January (+2.3°). The shift is smaller than in 76% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at San Marine’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 39° to 52°. August is the most reliable, staying within 6°.
Common questions about San Marine’s climate
What is the coldest month in San Marine?
February, with a typical high of 52° and a low of 39°.
What is the hottest month in San Marine?
August, with a typical high of 68° and a low of 52°.
How much snow does San Marine get?
Almost none. A normal year brings 0.9 inches.
When is the first frost in San Marine?
In half of years the first 32° night comes by December 11, and the last spring frost by February 19.
What is the rainiest month in San Marine?
December, with 14.1 inches of rain and melted snow. The year totals 82 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for San Marine itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Yachats, OR (2 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.