Hardly any U.S. towns collect more precipitation than Graniteville: 72 inches a year
Deep winter brings January lows near 30°. The year swings widely: the coldest month’s nights and the warmest month’s afternoons are 52° apart. In July, afternoons here are cooler than in 89% of U.S. towns. Long walks are most pleasant from May to October, when afternoons reach 63–81°.
A year in Graniteville at a glance
Each month’s typical high and low, and what it brings.
What stands out about Graniteville’s climate
Compared with towns across the U.S., with Graniteville’s place in California beside it.
What a year in Graniteville feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 167 frost-free days a year
In half of years the last 32° night comes by May 12 and the first by October 29. Frost and day counts come from NOAA’s station at Bowman Dam, CA, 4 miles from the town’s center, 260 ft higher.
The 2023 USDA map puts Graniteville’s center in zone 8a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 15°. 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 72 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 Graniteville
94% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from October through May.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Bowman Dam, CA.
Living with Graniteville’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
167 frost-free days in zone 8a. The last frost comes by May 12 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Oct 29.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August, September and October. 2.0 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Graniteville from natural hazards, wildfire is the largest share (50%). Normals are averages; the hazards page covers the extremes.
Natural hazards →Graniteville and similar climates
TownRatings has no climate map of the towns around Graniteville 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 Graniteville averaged 0.9° warmer than the 1900s. The biggest change is in January (+1.9°).
A smaller shift than in 85% 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 Graniteville compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Graniteville’s place among California’s.
Graniteville weather by month
Highs, lows and precipitation from NOAA’s grid at Graniteville’s center. 1991–2020 normals.
| Month | High | Low | Rain + melt | 30-yr range |
|---|---|---|---|---|
| January | 45° | 30° | 12.2" | 32° – 44° |
| February | 46° | 29° | 11.5" | 29° – 46° |
| March | 50° | 31° | 10.8" | 32° – 48° |
| April | 55° | 33° | 6.1" | 37° – 48° |
| May | 63° | 40° | 4.2" | 42° – 60° |
| June | 73° | 47° | 1.3" | 55° – 65° |
| July | 81° | 54° | 0.1" | 63° – 71° |
| August | 81° | 53° | 0.2" | 64° – 70° |
| September | 76° | 49° | 0.7" | 58° – 66° |
| October | 65° | 41° | 4.0" | 49° – 60° |
| November | 52° | 34° | 7.5" | 34° – 49° |
| December | 44° | 29° | 13.2" | 32° – 42° |
| Year | 61° | 39° | 71.7" |
How much a month can swing
A normal is an average. May swings the most: from 1991 to 2020 its average ranged from 42° to 60°. August is the most reliable, staying within 7°.
Where Graniteville’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 Graniteville’s center.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Bowman Dam, CA, 4 miles from the town’s center, 260 ft higher; the nearest station that passes our checks for distance, height and agreement with the grid.
- 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 Graniteville’s climate
What is the weather like in Graniteville?
A typical July afternoon reaches 81°, a January night drops to 30°. Milder January nights than 72% of U.S. towns; cooler July afternoons than 89% of U.S. towns.
How cold does it get in Graniteville in winter?
February nights average 29°. About 127 nights a year reach 32° or below. In the coldest February of the last 30 years the month averaged 29°.
How hot does it get in Graniteville?
July, with a typical high of 81° and a low of 54°. About 9 days a year reach 90° (Bowman Dam, CA).
When is the first and last frost in Graniteville?
In half of years the last spring frost (32°) comes by May 12 and the first fall frost by October 29, about 167 frost-free days, at Bowman Dam, CA.
What growing zone is Graniteville in?
Zone 8a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 15°.
What is the best time of year to visit Graniteville?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June, July, August, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Graniteville getting warmer?
Yes: 1991–2020 averaged 0.9° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 85% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Graniteville.
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.