Herlong’s winters are milder and less snowy than most of the U.S.
A typical July afternoon reaches 92°, a January night drops to 23°, and about 17 inches of snow falls in a normal winter.
A year in Herlong at a glance
Each month’s typical high and low, and what it brings.
What stands out about Herlong’s climate
Compared with towns across the U.S., with Herlong’s place in California beside it.
What a year in Herlong feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 130 frost-free days a year
In half of years the last 32° night comes by May 21 and the first by October 1. Frost and day counts come from NOAA’s station at Doyle 4 Sse, CA, 12 miles from the town’s center, 280 ft higher.
The 2023 USDA map puts Herlong’s center in zone 7a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 3°. 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 17 inches of snow a winter
Snow, measured at Doyle, CA, falls mostly in December. Precipitation (rain plus melted snow) adds up to 10 inches a year; January is the wettest month and August the driest. Rain or snow falls on about 45 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Herlong
94% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from October 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 Doyle 4 Sse, CA.
Living with Herlong’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
130 frost-free days in zone 7a. The last frost comes by May 21 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 1.
Months with highs of 62–84° and lows of 40° or more: May, June and September. 2.7 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Herlong from natural hazards, wildfire is the largest share (48%); heat waves, cold waves, winter storms and ice storms together are 1%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Herlong and similar climates
TownRatings has no climate map of the towns around Herlong yet.
Climates most like Herlong’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 |
|---|---|---|---|---|
| Herlong, CA | 23° | 92° | 10" | 17" |
| Kuna, ID | 24° | 92° | 11" | 18" |
| Ontario, OR | 23° | 93° | 10" | 15" |
| North Valley, NM | 21° | 93° | 10" | 12" |
| Chino Valley, AZ | 27° | 92° | 11" | 10" |
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 Herlong averaged 1.3° warmer than the 1900s. The biggest change is in January (+2.4°).
A smaller shift than in 55% 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 Herlong compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Herlong’s place among California’s.
Herlong weather by month
Highs, lows and precipitation from NOAA’s grid at Herlong’s center; snow, wet days and snow on the ground from Doyle, CA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 44° | 23° | 1.7" | 3.5" | 6 | 2 | 24° – 42° |
| February | 50° | 27° | 1.2" | 2.6" | 6 | 0 | 31° – 44° |
| March | 57° | 31° | 1.2" | 1.9" | 5 | 0 | 38° – 50° |
| April | 63° | 34° | 0.7" | 1.1" | 4 | 0 | 44° – 54° |
| May | 73° | 41° | 0.9" | 0.1" | 4 | 0 | 50° – 65° |
| June | 83° | 48° | 0.5" | 0.0" | 3 | 0 | 60° – 71° |
| July | 92° | 54° | 0.3" | 0.0" | 1 | 0 | 67° – 77° |
| August | 90° | 52° | 0.2" | 0.0" | 1 | 0 | 67° – 75° |
| September | 82° | 45° | 0.2" | 0.0" | 2 | 0 | 60° – 68° |
| October | 69° | 36° | 0.7" | 0.0" | 3 | 0 | 47° – 58° |
| November | 54° | 28° | 0.9" | 1.9" | 4 | 0 | 33° – 47° |
| December | 44° | 23° | 1.7" | 5.4" | 6 | 2 | 26° – 39° |
| Year | 67° | 37° | 10.1" | 16.5" | 45 | 4 |
How much a month can swing
A normal is an average. January swings the most: from 1991 to 2020 its average ranged from 24° to 42°. August is the most reliable, staying within 8°.
Where Herlong’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 Herlong’s center.
- Snow: Doyle, CA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Doyle 4 Sse, CA, 12 miles from the town’s center, 280 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 Herlong’s climate
What is the weather like in Herlong?
A typical July afternoon reaches 92°, a January night drops to 23°, and about 17 inches of snow falls in a normal winter. Milder January nights than 58% of U.S. towns; hotter July afternoons than 86% of U.S. towns.
How cold does it get in Herlong in winter?
December nights average 23°. About 140 nights a year reach 32° or below and 1 reach 0° or below. In the coldest December of the last 30 years the month averaged 26°.
How much snow does Herlong get?
About 17 inches in a normal winter at Doyle, CA, most of it in December, with snow on the ground about 4 days a year.
How hot does it get in Herlong?
July, with a typical high of 92° and a low of 54°. About 30 days a year reach 90° (Doyle 4 Sse, CA).
When is the first and last frost in Herlong?
In half of years the last spring frost (32°) comes by May 21 and the first fall frost by October 1, about 130 frost-free days, at Doyle 4 Sse, CA.
What growing zone is Herlong in?
Zone 7a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 3°.
What is the best time of year to visit Herlong?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June and September. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Herlong getting warmer?
Yes: 1991–2020 averaged 1.3° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 55% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Herlong.
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.