Herlong, CA climate
Herlong has chilly winters and warm summers, with very little rain. A typical July afternoon reaches 92°, a January night drops to 23°, and about 17 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Herlong feels like
Winter
Spring
Summer
Fall
Herlong weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 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 | 3 | 0 | 60° – 71° |
| July | 92° | 54° | 0.3" | 0 | 1 | 0 | 67° – 77° |
| August | 90° | 52° | 0.2" | 0 | 1 | 0 | 67° – 75° |
| September | 82° | 45° | 0.2" | 0 | 2 | 0 | 60° – 68° |
| October | 69° | 36° | 0.7" | 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 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in Herlong
Herlong gets 10 inches of rain and melted snow a year. January is the wettest month and August the driest. Rain or snow falls on about 45 days a year.
About 130 frost-free days a year
In half of years the last 32° night comes by May 21 and the first one by October 1. That leaves about 130 frost-free days for gardens, shorter than 95% of U.S. towns.
Heating and cooling a home in Herlong
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Herlong, 94% of that work is heating and 6% is cooling, so the furnace matters far more than the air conditioner.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
How Herlong compares
Compared with every U.S. town and city on TownTapestry, each counted once.
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°). The shift is larger than in 56% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Herlong’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. January swings the most: between 1991 and 2020 its average temperature ranged from 24° to 42°. August is the most reliable, staying within 8°.
Common questions about Herlong’s climate
What is the coldest month in Herlong?
December, with a typical high of 44° and a low of 23°.
What is the hottest month in Herlong?
July, with a typical high of 92° and a low of 54°. About 30 days a year reach 90°.
How much snow does Herlong get?
About 17 inches in a normal winter, most of it in December.
When is the first frost in Herlong?
In half of years the first 32° night comes by October 1, and the last spring frost by May 21.
What is the rainiest month in Herlong?
January, with 1.7 inches of rain and melted snow. The year totals 10 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Herlong itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Doyle, CA (8 mi, snow) and Doyle 4 Sse, CA (12 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.