Granite, OR climate
Granite has chilly winters and pleasant summers. A typical July afternoon reaches 79°, a January night drops to 18°.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Granite feels like
Winter
Spring
Summer
Fall
Granite weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | 30-yr range |
|---|---|---|---|---|
| January | 35° | 18° | 3.3" | 19° – 32° |
| February | 39° | 19° | 2.7" | 23° – 36° |
| March | 45° | 24° | 2.6" | 30° – 41° |
| April | 51° | 28° | 2.4" | 34° – 47° |
| May | 60° | 34° | 2.5" | 41° – 53° |
| June | 67° | 39° | 1.5" | 49° – 61° |
| July | 79° | 44° | 0.5" | 51° – 66° |
| August | 79° | 43° | 0.6" | 56° – 65° |
| September | 70° | 37° | 0.9" | 50° – 58° |
| October | 56° | 30° | 1.7" | 37° – 50° |
| November | 41° | 24° | 2.9" | 25° – 38° |
| December | 33° | 18° | 3.7" | 20° – 30° |
| Year | 55° | 30° | 25.3" |
“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 Granite
Granite gets 25 inches of rain and melted snow a year. December is the wettest month and July the driest.
A year-round growing season
Heating and cooling a home in Granite
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Granite, 99% of that work is heating and 1% 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 Granite 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 Granite averaged 1.6° warmer than the 1900s. The biggest change is in January (+4.1°). The shift is larger than in 78% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Granite’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 51° to 66°. September is the most reliable, staying within 9°.
Common questions about Granite’s climate
What is the coldest month in Granite?
December, with a typical high of 33° and a low of 18°.
What is the hottest month in Granite?
August, with a typical high of 79° and a low of 43°. About 21 days a year reach 90°.
When is the first frost in Granite?
Frost is uncommon. Only 100% of years see a night at 32° or below.
What is the rainiest month in Granite?
December, with 3.7 inches of rain and melted snow. The year totals 25 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Granite itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Austin 3 S, OR (17 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.