Fallbrook, CA climate
Fallbrook has warm winters and warm summers, with very little rain. A typical July afternoon reaches 86°, a January night drops to 45°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decade2° warmer than normal today. The forecast high is 85°, and a typical Sep 30 in Fallbrook peaks around 83°.Live forecast: National Weather Service · Normal: NOAA 1991–2020
What a year in Fallbrook feels like
Winter
Spring
Summer
Fall
Fallbrook 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 | 68° | 45° | 2.7" | 0 | 6 | 0 | 53° – 62° |
| February | 67° | 46° | 3.0" | 0 | 7 | 0 | 51° – 63° |
| March | 69° | 48° | 2.0" | 0 | 6 | 0 | 53° – 65° |
| April | 72° | 50° | 0.8" | 0 | 4 | 0 | 57° – 66° |
| May | 75° | 54° | 0.3" | 0 | 3 | 0 | 61° – 70° |
| June | 80° | 58° | 0.1" | 0 | 1 | 0 | 66° – 73° |
| July | 86° | 62° | 0.1" | 0 | 1 | 0 | 70° – 80° |
| August | 88° | 63° | 0.0" | 0 | 0 | 0 | 73° – 79° |
| September | 86° | 61° | 0.1" | 0 | 1 | 0 | 70° – 77° |
| October | 80° | 56° | 0.6" | 0 | 2 | 0 | 63° – 73° |
| November | 74° | 49° | 1.0" | 0 | 4 | 0 | 55° – 65° |
| December | 67° | 44° | 1.9" | 0 | 6 | 0 | 53° – 61° |
| Year | 76° | 53° | 12.5" | 0.0" | 41 | 0 |
“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 Fallbrook
Fallbrook gets 13 inches of rain and melted snow a year. February is the wettest month and August the driest. Rain or snow falls on about 41 days a year.
A year-round growing season
Heating and cooling a home in Fallbrook
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Fallbrook, 49% of that work is heating and 51% is cooling.
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 Fallbrook 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 Fallbrook averaged 1.9° warmer than the 1900s. The biggest change is in January (+3.0°). The shift is larger than in 90% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Fallbrook’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. February swings the most: between 1991 and 2020 its average temperature ranged from 51° to 63°. August is the most reliable, staying within 6°.
Common questions about Fallbrook’s climate
What is the coldest month in Fallbrook?
December, with a typical high of 67° and a low of 44°.
What is the hottest month in Fallbrook?
August, with a typical high of 88° and a low of 63°. About 60 days a year reach 90°.
How much snow does Fallbrook get?
Almost none. A normal year brings 0.0 inches.
When is the first frost in Fallbrook?
Frost is uncommon. Only 17% of years see a night at 32° or below.
What is the rainiest month in Fallbrook?
February, with 3.0 inches of rain and melted snow. The year totals 13 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Fallbrook itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Escondido #2, CA (19 mi, snow) and Fallbrook 5 Ne, CA (5 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.