Photo: Bobak Ha'Eri · CC BY 3.0Volcano reaches 100° on about 12 days a year, more than 92% of U.S. towns
In January the night’s low is typically 37°. Winters are mild: January nights here are milder than in 84% of U.S. towns. Warming shows here too: 0.8° more than in 1901–2000, led by August. Homes need heating from December to March, the months averaging under 50°.
A year in Volcano at a glance
Each month’s typical high and low, and what it brings.
What stands out about Volcano’s climate
Compared with towns across the U.S., with Volcano’s place in California beside it.
What a year in Volcano feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 237 frost-free days a year
In half of years the last 32° night comes by March 31 and the first by November 21. Frost and day counts come from NOAA’s station at Placerville, CA, 20 miles from the town’s center, 460 ft lower.
The 2023 USDA map puts Volcano’s center in zone 9a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 23°. 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 43 inches of rain a year
January is the wettest month and July the driest. Rain falls on about 69 days a year. Snow is rare: about 0.3" in a normal year at Fiddletown Dexter Rch, CA, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Volcano
71% of the work is heating. Months averaging under 55° run from November through April.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Placerville, CA.
Living with Volcano’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
237 frost-free days in zone 9a. The last frost comes by Mar 31 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Nov 21.
Months with highs of 62–84° and lows of 40° or more: April, May, June and October.
Parks & trails →Of the yearly building losses FEMA expects in Volcano from natural hazards, avalanches are the largest share (42%); heat waves, cold waves, winter storms and ice storms together are 3%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Volcano and similar climates
TownRatings has no climate map of the towns around Volcano yet.
Climates most like Volcano’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Volcano, CA | 37° | 91° | 43" | 0.3" |
| Thomson, GA | 35° | 91° | 46" | 0.5" |
| Lugoff, SC | 33° | 92° | 43" | 0.4" |
| Laurinburg, NC | 33° | 91° | 45" | 1.1" |
| Jacksonville, TX | 37° | 93° | 47" | 0.3" |
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 Volcano averaged 0.8° warmer than the 1900s. The biggest change is in August (+1.5°).
A smaller shift than in 90% 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 Volcano compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Volcano’s place among California’s.
Volcano weather by month
Highs, lows and precipitation from NOAA’s grid at Volcano’s center; snow, wet days and snow on the ground from Fiddletown Dexter Rch, CA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 54° | 37° | 7.8" | 0.0" | 11 | 0 | 40° – 54° |
| February | 56° | 38° | 7.2" | 0.1" | 11 | 0 | 38° – 55° |
| March | 60° | 39° | 6.7" | 0.1" | 10 | 0 | 40° – 58° |
| April | 65° | 42° | 3.8" | 0.0" | 7 | 0 | 46° – 58° |
| May | 73° | 48° | 2.3" | 0.0" | 5 | 0 | 50° – 70° |
| June | 83° | 55° | 0.6" | 0.0" | 1 | 0 | 62° – 75° |
| July | 91° | 62° | 0.0" | 0.0" | 0 | 0 | 72° – 82° |
| August | 91° | 61° | 0.1" | 0.0" | 0 | 0 | 72° – 81° |
| September | 85° | 57° | 0.4" | 0.0" | 1 | 0 | 66° – 76° |
| October | 74° | 49° | 2.3" | 0.0" | 3 | 0 | 57° – 70° |
| November | 60° | 41° | 4.3" | 0.1" | 7 | 0 | 41° – 57° |
| December | 52° | 36° | 7.5" | 0.0" | 11 | 0 | 39° – 51° |
| Year | 70° | 47° | 42.9" | 0.3" | 69 | 0 |
How much a month can swing
A normal is an average. May swings the most: from 1991 to 2020 its average ranged from 50° to 70°. August is the most reliable, staying within 9°.
Where Volcano’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 Volcano’s center.
- Snow: Fiddletown Dexter Rch, CA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Placerville, CA, 20 miles from the town’s center, 460 ft lower; 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 Volcano’s climate
What is the weather like in Volcano?
A typical July afternoon reaches 91°, a January night drops to 37°, and snow is almost unheard of. Milder January nights than 84% of U.S. towns; hotter July afternoons than 82% of U.S. towns.
How cold does it get in Volcano in winter?
December nights average 36°. About 30 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 39°.
How much snow does Volcano get?
About 0.3 inches in a normal winter at Fiddletown Dexter Rch, CA, so most winters see none.
How hot does it get in Volcano?
July, with a typical high of 91° and a low of 62°. About 74 days a year reach 90° and 12 reach 100° (Placerville, CA).
When is the first and last frost in Volcano?
In half of years the last spring frost (32°) comes by March 31 and the first fall frost by November 21, about 237 frost-free days, at Placerville, CA.
What growing zone is Volcano in?
Zone 9a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 23°.
What is the best time of year to visit Volcano?
By one simple rule (highs of 62–84° and lows of 40° or more), April, May, June and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Volcano getting warmer?
Yes: 1991–2020 averaged 0.8° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 90% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Volcano.
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.