Derby Acres sits near the bottom of U.S. towns for precipitation, with 6 inches a year
In January the night’s low is typically 39°. Its July heat outdoes that of 98% of U.S. towns. Warming shows here too: 1.7° more than in 1901–2000, led by January. Tender plants can go out after about January 24; in half of years the first frost comes by December 17.
A year in Derby Acres at a glance
Each month’s typical high and low, and what it brings.
What stands out about Derby Acres’ climate
Compared with towns across the U.S., with Derby Acres’ place in California beside it.
What a year in Derby Acres feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 330 frost-free days a year
In half of years the last 32° night comes by January 24 and the first by December 17. Frost and day counts come from Taft, CA, 12 miles away.
The 2023 USDA map puts Derby Acres’ center in zone 9b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 29°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 6 inches of rain a year
February is the wettest month and July the driest. Rain falls on about 32 days a year. Snow is rare: about 0.0" in a normal year at Buttonwillow, CA, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Derby Acres
47% of the work is heating, so air conditioning is the bigger bill. Months averaging under 55° run from November through February.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Taft, CA.
Living with Derby Acres’ climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
330 frost-free days in zone 9b. The last frost comes by Jan 24 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Dec 17.
Months with highs of 62–84° and lows of 40° or more: March, April, May, October and November. 7.6 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Derby Acres from natural hazards, earthquakes are the largest share (60%); heat waves, cold waves, winter storms and ice storms together are 11%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Derby Acres and similar climates
TownRatings has no climate map of the towns around Derby Acres yet.
Climates most like Derby Acres’, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Derby Acres, CA | 39° | 97° | 6" | 0.0" |
| Green Valley, AZ | 36° | 97° | 13" | 0.1" |
| Canutillo, TX | 32° | 96° | 9" | 0.0" |
| Anthony, NM | 31° | 96° | 9" | 0.0" |
| Summerlin South, NV | 35° | 102° | 5" | 0.2" |
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
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°).
A bigger shift than in 75% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Derby Acres compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Derby Acres’ place among California’s.
Derby Acres weather by month
Highs, lows and precipitation from NOAA’s grid at Derby Acres’ center; snow, wet days and snow on the ground from Buttonwillow, CA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 59° | 39° | 1.4" | 0.0" | 6 | 0 | 44° – 55° |
| February | 62° | 41° | 1.4" | 0.0" | 6 | 0 | 46° – 57° |
| March | 67° | 44° | 1.0" | 0.0" | 5 | 0 | 49° – 61° |
| April | 73° | 47° | 0.4" | 0.0" | 3 | 0 | 56° – 64° |
| May | 82° | 53° | 0.3" | 0.0" | 2 | 0 | 59° – 75° |
| June | 91° | 59° | 0.0" | 0.0" | 0 | 0 | 69° – 79° |
| July | 97° | 65° | 0.0" | 0.0" | 0 | 0 | 77° – 85° |
| August | 96° | 65° | 0.0" | 0.0" | 0 | 0 | 76° – 84° |
| September | 90° | 60° | 0.1" | 0.0" | 0 | 0 | 71° – 79° |
| October | 79° | 52° | 0.3" | 0.0" | 2 | 0 | 62° – 71° |
| November | 66° | 44° | 0.4" | 0.0" | 3 | 0 | 48° – 60° |
| December | 59° | 38° | 1.0" | 0.0" | 5 | 0 | 45° – 52° |
| Year | 77° | 51° | 6.2" | 0.0" | 32 | 0 |
How much a month can swing
A normal is an average. May swings the most: from 1991 to 2020 its average ranged from 59° to 75°. December is the most reliable, staying within 7°.
Where Derby Acres’ numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Derby Acres’ center.
- Snow: Buttonwillow, CA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Taft, CA, 12 miles from the town’s center, 710 ft lower; no station nearby passes every check; this is the nearest one in the same valley, flagged above.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Derby Acres’ climate
What is the weather like in Derby Acres?
A typical July afternoon reaches 97°, a January night drops to 39°, and snow is almost unheard of. Milder January nights than 87% of U.S. towns; hotter July afternoons than 98% of U.S. towns.
How cold does it get in Derby Acres in winter?
December nights average 38°. About 7 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 45°.
How much snow does Derby Acres get?
About 0.0 inches in a normal winter at Buttonwillow, CA, so most winters see none.
How hot does it get in Derby Acres?
July, with a typical high of 97° and a low of 65°. About 113 days a year reach 90° and 34 reach 100° (Taft, CA).
When is the first and last frost in Derby Acres?
In half of years the last spring frost (32°) comes by January 24 and the first fall frost by December 17, about 330 frost-free days, at Taft, CA.
What growing zone is Derby Acres in?
Zone 9b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 29°.
What is the best time of year to visit Derby Acres?
By one simple rule (highs of 62–84° and lows of 40° or more), March, April, May, October and November. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Derby Acres getting warmer?
Yes: 1991–2020 averaged 1.7° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 75% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Derby Acres.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.