Rosamond, CA climate
Rosamond has mild winters and hot summers, with very little rain. A typical July afternoon reaches 98°, a January night drops to 33°, and about 1 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Rosamond feels like
Winter
Spring
Summer
Fall
Rosamond 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 | 59° | 33° | 1.7" | 0.5" | 4 | 0 | 42° – 51° |
| February | 62° | 36° | 2.1" | 0.1" | 4 | 0 | 43° – 56° |
| March | 67° | 40° | 1.2" | 0.2" | 3 | 0 | 47° – 60° |
| April | 73° | 45° | 0.4" | 0 | 2 | 0 | 52° – 64° |
| May | 81° | 53° | 0.1" | 0 | 1 | 0 | 57° – 75° |
| June | 91° | 61° | 0.0" | 0 | 0 | 0 | 69° – 82° |
| July | 98° | 67° | 0.1" | 0 | 0 | 0 | 77° – 87° |
| August | 98° | 65° | 0.1" | 0 | 0 | 0 | 78° – 85° |
| September | 91° | 58° | 0.2" | 0 | 0 | 0 | 69° – 79° |
| October | 80° | 48° | 0.4" | 0 | 1 | 0 | 60° – 70° |
| November | 67° | 38° | 0.5" | 0 | 2 | 0 | 45° – 58° |
| December | 57° | 32° | 1.2" | 0.4" | 3 | 0 | 40° – 48° |
| Year | 77° | 48° | 7.7" | 1.2" | 20 | 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 Rosamond
Rosamond 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 20 days a year.
About 211 frost-free days a year
In half of years the last 32° night comes by April 3 and the first one by November 1. That leaves about 211 frost-free days for gardens, longer than 79% of U.S. towns.
Heating and cooling a home in Rosamond
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Rosamond, 61% of that work is heating and 39% 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 Rosamond 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 Rosamond averaged 1.9° warmer than the 1900s. The biggest change is in March (+2.6°). The shift is larger than in 92% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Rosamond’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. May swings the most: between 1991 and 2020 its average temperature ranged from 57° to 75°. December is the most reliable, staying within 7°.
Common questions about Rosamond’s climate
What is the coldest month in Rosamond?
December, with a typical high of 57° and a low of 32°.
What is the hottest month in Rosamond?
July, with a typical high of 98° and a low of 67°. About 109 days a year reach 90°.
How much snow does Rosamond get?
About 1 inches in a normal winter, most of it in January.
When is the first frost in Rosamond?
In half of years the first 32° night comes by November 1, and the last spring frost by April 3.
What is the rainiest month in Rosamond?
February, with 2.1 inches of rain and melted snow. The year totals 8 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Rosamond itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Mojave, CA (13 mi, snow) and Lancaster Wm J Fox Fld, CA (9 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.