Jacumba, CA climate
Jacumba has mild winters and hot summers, with very little rain. A typical July afternoon reaches 96°, a January night drops to 39°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Jacumba feels like
Winter
Spring
Summer
Fall
Jacumba 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 | 62° | 39° | 1.4" | 0.1" | 7 | 0 | 46° – 56° |
| February | 63° | 39° | 1.6" | 0 | 8 | 0 | 45° – 58° |
| March | 67° | 40° | 1.1" | 0 | 7 | 0 | 48° – 61° |
| April | 73° | 43° | 0.3" | 0.1" | 5 | 0 | 52° – 62° |
| May | 80° | 49° | 0.2" | 0 | 2 | 0 | 58° – 71° |
| June | 90° | 54° | 0.0" | 0 | 0 | 0 | 67° – 77° |
| July | 96° | 61° | 0.3" | 0 | 2 | 0 | 74° – 83° |
| August | 97° | 62° | 0.4" | 0 | 2 | 0 | 76° – 83° |
| September | 91° | 58° | 0.4" | 0 | 2 | 0 | 71° – 78° |
| October | 80° | 51° | 0.3" | 0 | 3 | 0 | 61° – 71° |
| November | 70° | 44° | 0.5" | 0 | 5 | 0 | 49° – 62° |
| December | 62° | 38° | 1.4" | 0.1" | 7 | 0 | 45° – 55° |
| Year | 78° | 48° | 7.8" | 0.3" | 48 | 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 Jacumba
Jacumba gets 8 inches of rain and melted snow a year. February is the wettest month and June the driest. Rain or snow falls on about 48 days a year.
About 174 frost-free days a year
In half of years the last 32° night comes by April 30 and the first one by October 26. That leaves about 174 frost-free days for gardens, shorter than 56% of U.S. towns.
Heating and cooling a home in Jacumba
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Jacumba, 76% of that work is heating and 24% 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 Jacumba 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 Jacumba averaged 1.9° warmer than the 1900s. The biggest change is in January (+3.2°). The shift is larger than in 90% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Jacumba’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. March swings the most: between 1991 and 2020 its average temperature ranged from 48° to 61°. August is the most reliable, staying within 7°.
Common questions about Jacumba’s climate
What is the coldest month in Jacumba?
December, with a typical high of 62° and a low of 38°.
What is the hottest month in Jacumba?
August, with a typical high of 97° and a low of 62°. About 97 days a year reach 90°.
How much snow does Jacumba get?
Almost none. A normal year brings 0.3 inches.
When is the first frost in Jacumba?
In half of years the first 32° night comes by October 26, and the last spring frost by April 30.
What is the rainiest month in Jacumba?
February, with 1.6 inches of rain and melted snow. The year totals 8 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Jacumba itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Campo, CA (16 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.