Grants Pass, OR climate
Grants Pass has mild winters and warm summers. A typical July afternoon reaches 90°, a January night drops to 34°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Grants Pass feels like
Winter
Spring
Summer
Fall
Grants Pass 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 | 49° | 34° | 5.6" | 0.6" | 17 | 0 | 37° – 47° |
| February | 55° | 34° | 4.1" | 0.1" | 14 | 0 | 38° – 50° |
| March | 60° | 36° | 4.0" | 0.1" | 16 | 0 | 44° – 54° |
| April | 65° | 39° | 2.5" | 0 | 13 | 0 | 48° – 58° |
| May | 74° | 45° | 1.6" | 0 | 9 | 0 | 54° – 66° |
| June | 81° | 49° | 0.8" | 0 | 5 | 0 | 61° – 73° |
| July | 90° | 55° | 0.3" | 0 | 2 | 0 | 65° – 78° |
| August | 90° | 53° | 0.3" | 0 | 2 | 0 | 67° – 75° |
| September | 84° | 47° | 0.6" | 0 | 3 | 0 | 62° – 70° |
| October | 70° | 41° | 2.0" | 0 | 8 | 0 | 52° – 61° |
| November | 55° | 37° | 4.6" | 0 | 16 | 0 | 39° – 51° |
| December | 47° | 34° | 6.8" | 0.1" | 17 | 0 | 36° – 45° |
| Year | 68° | 42° | 33.1" | 0.9" | 121 | 0 |
“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 Grants Pass
Grants Pass gets 33 inches of rain and melted snow a year. December is the wettest month and August the driest. Rain or snow falls on about 121 days a year.
About 201 frost-free days a year
In half of years the last 32° night comes by April 8 and the first one by October 28. That leaves about 201 frost-free days for gardens, longer than 73% of U.S. towns.
Heating and cooling a home in Grants Pass
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Grants Pass, 85% of that work is heating and 15% 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 Grants Pass 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 Grants Pass averaged 1.5° warmer than the 1900s. The biggest change is in January (+2.7°). The shift is larger than in 68% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Grants Pass’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. July swings the most: between 1991 and 2020 its average temperature ranged from 65° to 78°. September is the most reliable, staying within 8°.
Common questions about Grants Pass’s climate
What is the coldest month in Grants Pass?
December, with a typical high of 47° and a low of 34°.
What is the hottest month in Grants Pass?
July, with a typical high of 90° and a low of 55°. About 55 days a year reach 90°.
How much snow does Grants Pass get?
Almost none. A normal year brings 0.9 inches.
When is the first frost in Grants Pass?
In half of years the first 32° night comes by October 28, and the last spring frost by April 8.
What is the rainiest month in Grants Pass?
December, with 6.8 inches of rain and melted snow. The year totals 33 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Grants Pass itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Grants Pass, OR (1 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.