Photo: Scott Catron from Sandy, Utah, USA · CC BY-SA 2.0Summers in Granite are cooler than in 95% of U.S. towns
Nights in January average 18°. Temperatures cover 61° across the year, low to high. By precipitation alone, it ranks drier than 87% of U.S. towns. Warm coats and heating bills mark the months from October to May, when means dip under 50°.
A year in Granite at a glance
Each month’s typical high and low, and what it brings.
What stands out about Granite’s climate
Compared with towns across the U.S., with Granite’s place in Oregon beside it.
What a year in Granite feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
A freeze is possible in every month
About 245 nights a year fall to 32° or below, and 12 to 0° or below. Frost and day counts come from Austin 3 S, OR, 17 miles away.
The 2023 USDA map puts Granite’s center in zone 6a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −8°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 25 inches of rain a year
December is the wettest month and July the driest.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Granite
99% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from September through June.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Austin 3 S, OR.
Living with Granite’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
Zone 6a, and frost can come in any month. The longest frost-free stretch in half of years is about 74 days.
Months with highs of 62–84° and lows of 40° or more: July and August. 0.5 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Granite from natural hazards, river flooding is the largest share (55%); heat waves, cold waves, winter storms and ice storms together are 3%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Granite and similar climates
TownRatings has no climate map of the towns around Granite yet.
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
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°).
A bigger shift than in 68% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Granite compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Granite’s place among Oregon’s.
Granite weather by month
Highs, lows and precipitation from NOAA’s grid at Granite’s center. 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" |
How much a month can swing
A normal is an average. July swings the most: from 1991 to 2020 its average ranged from 51° to 66°. September is the most reliable, staying within 9°.
Where Granite’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Granite’s center.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Austin 3 S, OR, 17 miles from the town’s center, 550 ft lower; no station nearby passes every check; this is the nearest one in the same valley, flagged above.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Granite’s climate
What is the weather like in Granite?
A typical July afternoon reaches 79°, a January night drops to 18°. Colder January nights than 70% of U.S. towns; cooler July afternoons than 95% of U.S. towns.
How cold does it get in Granite in winter?
December nights average 18°. About 245 nights a year reach 32° or below and 12 reach 0° or below. In the coldest December of the last 30 years the month averaged 20°.
How hot does it get in Granite?
July, with a typical high of 79° and a low of 44°. About 21 days a year reach 90° (Austin 3 S, OR).
When is the first and last frost in Granite?
There is no reliable frost-free season: at Austin 3 S, OR, every month has nights at 32° or below, about 245 a year. In half of years the longest stretch without a freeze is about 74 days.
What growing zone is Granite in?
Zone 6a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −8°.
What is the best time of year to visit Granite?
By one simple rule (highs of 62–84° and lows of 40° or more), July and August. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Granite getting warmer?
Yes: 1991–2020 averaged 1.6° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 68% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Granite.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.