January in Long Barn stays gentler than in 76% of U.S. towns
Expect July afternoons of about 86°. Winter and summer sit 54° apart. Picnics, hikes and garden evenings suit May, June, September and October, with highs of 68–80°.
A year in Long Barn at a glance
Each month’s typical high and low, and what it brings.
What stands out about Long Barn’s climate
Compared with towns across the U.S., with Long Barn’s place in California beside it.
What a year in Long Barn feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 183 frost-free days a year
In half of years the last 32° night comes by May 2 and the first by November 4. Frost and day counts come from NOAA’s station at Cherry Valley Dam, CA, 14 miles from the town’s center, 240 ft lower.
The 2023 USDA map puts Long Barn’s center in zone 8b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 16°. 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 51 inches of snow a winter
Snow, measured at Hetch Hetchy, CA, falls mostly in February. Precipitation (rain plus melted snow) adds up to 44 inches a year; January is the wettest month and August the driest. Rain or snow falls on about 74 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Long Barn
85% 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 Cherry Valley Dam, CA.
Living with Long Barn’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
183 frost-free days in zone 8b. The last frost comes by May 2 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 4.
Months with highs of 62–84° and lows of 40° or more: May, June, September and October. 3.5 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Long Barn from natural hazards, wildfire is the largest share (66%); heat waves, cold waves, winter storms and ice storms together are 1%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Long Barn and similar climates
TownRatings has no climate map of the towns around Long Barn yet.
Climates most like Long Barn’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 |
|---|---|---|---|---|
| Long Barn, CA | 33° | 86° | 44" | 51" |
| Mount Vernon, NY | 26° | 86° | 47" | 33" |
| North Potomac, MD | 25° | 86° | 44" | 33" |
| Bayonne, NJ | 26° | 86° | 47" | 32" |
| Riverside, CT | 25° | 85° | 47" | 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 Long Barn averaged 0.8° warmer than the 1900s. The biggest change is in January (+1.9°).
A smaller shift than in 88% 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 Long Barn compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Long Barn’s place among California’s.
Long Barn weather by month
Highs, lows and precipitation from NOAA’s grid at Long Barn’s center; snow, wet days and snow on the ground from Hetch Hetchy, CA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 50° | 33° | 8.2" | 9.7" | 11 | 10 | 36° – 48° |
| February | 52° | 32° | 7.5" | 13.5" | 10 | 7 | 35° – 50° |
| March | 55° | 34° | 6.7" | 10.8" | 11 | 5 | 36° – 52° |
| April | 60° | 36° | 3.9" | 4.3" | 8 | 2 | 42° – 54° |
| May | 68° | 43° | 2.4" | 0.1" | 6 | 0 | 47° – 64° |
| June | 78° | 51° | 0.7" | 0.0" | 2 | 0 | 58° – 70° |
| July | 86° | 58° | 0.1" | 0.0" | 1 | 0 | 67° – 76° |
| August | 86° | 57° | 0.1" | 0.0" | 1 | 0 | 67° – 75° |
| September | 80° | 53° | 0.4" | 0.0" | 2 | 0 | 62° – 71° |
| October | 70° | 45° | 2.5" | 0.0" | 4 | 0 | 53° – 65° |
| November | 57° | 37° | 4.2" | 3.0" | 7 | 2 | 37° – 53° |
| December | 49° | 32° | 7.6" | 10.0" | 10 | 8 | 36° – 47° |
| Year | 66° | 43° | 44.2" | 51.4" | 74 | 34 |
How much a month can swing
A normal is an average. May swings the most: from 1991 to 2020 its average ranged from 47° to 64°. August is the most reliable, staying within 8°.
Where Long Barn’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 Long Barn’s center.
- Snow: Hetch Hetchy, CA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Cherry Valley Dam, CA, 14 miles from the town’s center, 240 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 Long Barn’s climate
What is the weather like in Long Barn?
A typical July afternoon reaches 86°, a January night drops to 33°, and about 51 inches of snow falls in a normal winter. Milder January nights than 76% of U.S. towns; hotter July afternoons than 54% of U.S. towns.
How cold does it get in Long Barn in winter?
December nights average 32°. About 87 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 36°.
How much snow does Long Barn get?
About 51 inches in a normal winter at Hetch Hetchy, CA, most of it in February, with snow on the ground about 34 days a year.
How hot does it get in Long Barn?
July, with a typical high of 86° and a low of 58°. About 38 days a year reach 90° (Cherry Valley Dam, CA).
When is the first and last frost in Long Barn?
In half of years the last spring frost (32°) comes by May 2 and the first fall frost by November 4, about 183 frost-free days, at Cherry Valley Dam, CA.
What growing zone is Long Barn in?
Zone 8b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 16°.
What is the best time of year to visit Long Barn?
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 Long Barn getting warmer?
Yes: 1991–2020 averaged 0.8° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 88% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Long Barn.
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.