Derby Acres, CA climate
Derby Acres has mild winters and hot summers, with very little rain. A typical July afternoon reaches 97°, a January night drops to 39°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Derby Acres feels like
Winter
Spring
Summer
Fall
Derby Acres 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° | 39° | 1.4" | 0 | 6 | 0 | 44° – 55° |
| February | 62° | 41° | 1.4" | 0 | 6 | 0 | 46° – 57° |
| March | 67° | 44° | 1.0" | 0 | 5 | 0 | 49° – 61° |
| April | 73° | 47° | 0.4" | 0 | 3 | 0 | 56° – 64° |
| May | 82° | 53° | 0.3" | 0 | 2 | 0 | 59° – 75° |
| June | 91° | 59° | 0.0" | 0 | 0 | 0 | 69° – 79° |
| July | 97° | 65° | 0.0" | 0 | 0 | 0 | 77° – 85° |
| August | 96° | 65° | 0.0" | 0 | 0 | 0 | 76° – 84° |
| September | 90° | 60° | 0.1" | 0 | 0 | 0 | 71° – 79° |
| October | 79° | 52° | 0.3" | 0 | 2 | 0 | 62° – 71° |
| November | 66° | 44° | 0.4" | 0 | 3 | 0 | 48° – 60° |
| December | 59° | 38° | 1.0" | 0 | 5 | 0 | 45° – 52° |
| Year | 77° | 51° | 6.2" | 0.0" | 32 | 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 Derby Acres
Derby Acres gets 6 inches of rain and melted snow a year. February is the wettest month and July the driest. Rain or snow falls on about 32 days a year.
About 289 frost-free days a year
In half of years the last 32° night comes by February 9 and the first one by November 26. That leaves about 289 frost-free days for gardens, longer than 94% of U.S. towns.
Heating and cooling a home in Derby Acres
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Derby Acres, 52% of that work is heating and 48% 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 Derby Acres 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 Derby Acres averaged 1.7° warmer than the 1900s. The biggest change is in January (+2.5°). The shift is larger than in 84% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Derby Acres’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 59° to 75°. December is the most reliable, staying within 7°.
Common questions about Derby Acres’s climate
What is the coldest month in Derby Acres?
December, with a typical high of 59° and a low of 38°.
What is the hottest month in Derby Acres?
July, with a typical high of 97° and a low of 65°. About 115 days a year reach 90°.
How much snow does Derby Acres get?
Almost none. A normal year brings 0.0 inches.
When is the first frost in Derby Acres?
In half of years the first 32° night comes by November 26, and the last spring frost by February 9.
What is the rainiest month in Derby Acres?
February, with 1.4 inches of rain and melted snow. The year totals 6 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Derby Acres itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Buttonwillow, CA (13 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.