More precipitation falls on Grizzly Flats than on 92% of U.S. towns: 53 inches a year
The warmest part of a July day comes in at 88° on average. Its January nights stay gentler than in 81% of U.S. towns. Warming shows here too: 0.7° more than in 1901–2000, led by September. The frost-free window for a garden runs roughly April 26 to November 2.
A year in Grizzly Flats at a glance
Each month’s typical high and low, and what it brings.
What stands out about Grizzly Flats’ climate
Compared with towns across the U.S., with Grizzly Flats’ place in California beside it.
What a year in Grizzly Flats feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 191 frost-free days a year
In half of years the last 32° night comes by April 26 and the first by November 2. Frost and day counts come from NOAA’s station at Pacific House, CA, 9 miles from the town’s center, 380 ft lower.
The 2023 USDA map puts Grizzly Flats’ center in zone 8b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 18°. 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 58 inches of snow a winter
Snow, measured at Pacific House, CA, falls mostly in February. Precipitation (rain plus melted snow) adds up to 53 inches a year; January is the wettest month and July the driest. Rain or snow falls on about 83 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Grizzly Flats
89% of the work is heating, so the furnace matters far more than the air conditioner. 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 Pacific House, CA.
Living with Grizzly Flats’ climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
191 frost-free days in zone 8b. The last frost comes by Apr 26 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 2.
Months with highs of 62–84° and lows of 40° or more: May, June, September and October. 4.0 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Grizzly Flats from natural hazards, wildfire is the largest share (53%); heat waves, cold waves, winter storms and ice storms together are 1%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Grizzly Flats and similar climates
TownRatings has no climate map of the towns around Grizzly Flats yet.
Climates most like Grizzly Flats’, 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 |
|---|---|---|---|---|
| Grizzly Flats, CA | 36° | 88° | 53" | 58" |
| Jersey City, NJ | 26° | 86° | 47" | 32" |
| Mount Vernon, NY | 26° | 86° | 47" | 33" |
| Charleston, WV | 25° | 87° | 46" | 32" |
| Cockeysville, MD | 23° | 87° | 48" | 34" |
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 Grizzly Flats averaged 0.7° warmer than the 1900s. The biggest change is in September (+1.6°).
A smaller shift than in 93% 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 Grizzly Flats compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Grizzly Flats’ place among California’s.
Grizzly Flats weather by month
Highs, lows and precipitation from NOAA’s grid at Grizzly Flats’ center; snow, wet days and snow on the ground from Pacific House, CA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 52° | 36° | 9.5" | 10.1" | 12 | 13 | 39° – 50° |
| February | 53° | 35° | 8.8" | 17.3" | 12 | 12 | 36° – 52° |
| March | 57° | 36° | 8.5" | 13.5" | 12 | 8 | 38° – 54° |
| April | 62° | 39° | 4.7" | 5.4" | 9 | 3 | 43° – 55° |
| May | 70° | 46° | 3.1" | 0.6" | 7 | 0 | 49° – 67° |
| June | 80° | 53° | 0.8" | 0.0" | 3 | 0 | 61° – 72° |
| July | 88° | 61° | 0.1" | 0.0" | 1 | 0 | 70° – 78° |
| August | 88° | 60° | 0.1" | 0.0" | 1 | 0 | 70° – 78° |
| September | 83° | 56° | 0.5" | 0.0" | 2 | 0 | 65° – 74° |
| October | 71° | 48° | 2.9" | 0.1" | 5 | 0 | 56° – 67° |
| November | 58° | 40° | 5.2" | 3.8" | 9 | 3 | 39° – 55° |
| December | 50° | 35° | 9.3" | 7.4" | 12 | 11 | 38° – 48° |
| Year | 68° | 45° | 53.3" | 58.2" | 83 | 50 |
How much a month can swing
A normal is an average. May swings the most: from 1991 to 2020 its average ranged from 49° to 67°. August is the most reliable, staying within 8°.
Where Grizzly Flats’ 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 Grizzly Flats’ center.
- Snow: Pacific House, CA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Pacific House, CA, 9 miles from the town’s center, 380 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 Grizzly Flats’ climate
What is the weather like in Grizzly Flats?
A typical July afternoon reaches 88°, a January night drops to 36°, and about 58 inches of snow falls in a normal winter. Milder January nights than 81% of U.S. towns; hotter July afternoons than 67% of U.S. towns.
How cold does it get in Grizzly Flats in winter?
December nights average 35°. About 97 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 38°.
How much snow does Grizzly Flats get?
About 58 inches in a normal winter at Pacific House, CA, most of it in February, with snow on the ground about 50 days a year.
How hot does it get in Grizzly Flats?
July, with a typical high of 88° and a low of 61°. About 58 days a year reach 90° and 2 reach 100° (Pacific House, CA).
When is the first and last frost in Grizzly Flats?
In half of years the last spring frost (32°) comes by April 26 and the first fall frost by November 2, about 191 frost-free days, at Pacific House, CA.
What growing zone is Grizzly Flats in?
Zone 8b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 18°.
What is the best time of year to visit Grizzly Flats?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Grizzly Flats getting warmer?
Yes: 1991–2020 averaged 0.7° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 93% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Grizzly Flats.
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.