Casa Blanca reaches 100° on about 124 days a year, more than all but 6 U.S. towns
Nights in January average 39°. Its yearly precipitation falls short of almost every U.S. town. Warming shows here too: 2.1° more than in 1901–2000, led by March. Seedlings are safe outdoors from about February 23, with the first autumn frost due around November 24.
A year in Casa Blanca at a glance
Each month’s typical high and low, and what it brings.
What stands out about Casa Blanca’s climate
Compared with towns across the U.S., with Casa Blanca’s place in Arizona beside it.
What a year in Casa Blanca feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 274 frost-free days a year
In half of years the last 32° night comes by February 23 and the first by November 24. Frost and day counts come from NOAA’s station at Maricopa 4 N, AZ, 7 miles from the town’s center, at about the same height.
The 2023 USDA map puts Casa Blanca’s center in zone 9b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 25°. 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 7 inches of rain a year
August is the wettest month and June the driest. Rain falls on about 32 days a year. Snow is rare: about 0.0" in a normal year at Maricopa 4 N, AZ, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Casa Blanca
26% of the work is heating, so air conditioning is the bigger bill. Months averaging under 55°: December and January.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Maricopa 4 N, AZ.
Living with Casa Blanca’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
274 frost-free days in zone 9b. The last frost comes by Feb 23 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Nov 24.
Months with highs of 62–84° and lows of 40° or more: February, March and November. 26 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Casa Blanca from natural hazards, river flooding is the largest share (55%); heat waves, cold waves, winter storms and ice storms together are 19%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Casa Blanca and similar climates
TownRatings has no climate map of the towns around Casa Blanca yet.
Climates most like Casa Blanca’s, 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 |
|---|---|---|---|---|
| Casa Blanca, AZ | 39° | 106° | 7" | 0.0" |
| Boulder City, NV | 41° | 106° | 4" | 0.0" |
| Garnet, CA | 43° | 105° | 5" | 0.0" |
| St. George, UT | 33° | 103° | 8" | 1.2" |
| Eagle Pass, TX | 41° | 98° | 19" | 0.0" |
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 Casa Blanca averaged 2.1° warmer than the 1900s. The biggest change is in March (+2.8°).
A bigger shift than in 93% 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 Casa Blanca compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Casa Blanca’s place among Arizona’s.
Casa Blanca weather by month
Highs, lows and precipitation from NOAA’s grid at Casa Blanca’s center; snow, wet days and snow on the ground from Maricopa 4 N, AZ. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 68° | 39° | 0.8" | 0.0" | 4 | 0 | 50° – 58° |
| February | 71° | 42° | 0.9" | 0.0" | 4 | 0 | 51° – 62° |
| March | 78° | 47° | 0.9" | 0.0" | 3 | 0 | 55° – 69° |
| April | 86° | 53° | 0.2" | 0.0" | 1 | 0 | 64° – 74° |
| May | 95° | 61° | 0.1" | 0.0" | 1 | 0 | 73° – 84° |
| June | 105° | 70° | 0.1" | 0.0" | 1 | 0 | 82° – 91° |
| July | 106° | 79° | 0.8" | 0.0" | 4 | 0 | 89° – 95° |
| August | 104° | 78° | 1.2" | 0.0" | 4 | 0 | 87° – 95° |
| September | 100° | 71° | 0.6" | 0.0" | 3 | 0 | 82° – 88° |
| October | 89° | 58° | 0.4" | 0.0" | 2 | 0 | 70° – 78° |
| November | 77° | 46° | 0.6" | 0.0" | 2 | 0 | 53° – 67° |
| December | 66° | 38° | 0.8" | 0.0" | 4 | 0 | 50° – 56° |
| Year | 87° | 57° | 7.3" | 0.0" | 32 | 0 |
How much a month can swing
A normal is an average. November swings the most: from 1991 to 2020 its average ranged from 53° to 67°. July is the most reliable, staying within 6°.
Where Casa Blanca’s 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 Casa Blanca’s center.
- Snow: Maricopa 4 N, AZ.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Maricopa 4 N, AZ, 7 miles from the town’s center, at about the same height; the nearest station that passes our checks for distance, height and agreement with the grid.
- 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 Casa Blanca’s climate
What is the weather like in Casa Blanca?
A typical July afternoon reaches 106°, 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 all but 42 U.S. towns.
How cold does it get in Casa Blanca in winter?
December nights average 38°. About 32 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 50°.
How much snow does Casa Blanca get?
About 0.0 inches in a normal winter at Maricopa 4 N, AZ, so most winters see none.
How hot does it get in Casa Blanca?
July, with a typical high of 106° and a low of 79°. About 183 days a year reach 90° and 124 reach 100° (Maricopa 4 N, AZ).
When is the first and last frost in Casa Blanca?
In half of years the last spring frost (32°) comes by February 23 and the first fall frost by November 24, about 274 frost-free days, at Maricopa 4 N, AZ.
What growing zone is Casa Blanca in?
Zone 9b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 25°.
What is the best time of year to visit Casa Blanca?
By one simple rule (highs of 62–84° and lows of 40° or more), February, March and November. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Casa Blanca getting warmer?
Yes: 1991–2020 averaged 2.1° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 93% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Casa Blanca.
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.