Casa Grande in Winter
In winter (December, January and February), Casa Grande sees average daytime highs around 68°F and overnight lows near 44°F, with 3.0 in of rain over about 11 wet days across the season. It is the coldest season of the year and the wettest season of the year.
Over the season highs climb from about 69°F in early December to 72°F by late February. The sky is clear or mostly clear about 57% of the time across winter, and the air most often feels dry.
Winter is Casa Grande's best season of the year to visit on our travel score. For the whole year in context, see Casa Grande's year-round climate.
- Avg daytime high
- 68°F
- coldest season of the year
- Avg overnight low
- 44°F
- Rainfall
- 3.0 in
- 11 wet days
- Avg wind
- 5 mph
- Travel score
- 7.6
- best season of the year
- Months
- Dec · Jan · Feb
Temperature in Casa Grande in Winter
Over the season highs climb from about 69°F in early December to 72°F by late February.
A typical winter day in Casa Grande reaches about 68°F and drops to 44°F overnight. The warmest of the three months is February, the coolest December.
How winter really feels in Casa Grande
Once humidity and wind are folded in, winter brings about 0 days that feel above 90°F and 0 that feel at or below 32°F.
winter sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Casa Grande weather by month
How the three winter months (December, January and February) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 67° / 43° | 1.0 | 3.5 | 10.1 | 7.5 |
| Feb | 71° / 47° | 1.1 | 3.7 | 10.8 | 7.8 |
| Mar | 78° / 52° | 0.7 | 2.7 | 11.8 | 8.3 |
| Apr | 85° / 57° | 0.2 | 1.1 | 12.8 | 6.8 |
| May | 94° / 65° | 0.1 | 0.6 | 13.7 | 3.5 |
| Jun | 104° / 74° | 0.1 | 0.5 | 14.1 | 0.4 |
| Jul | 105° / 81° | 0.8 | 3.9 | 13.9 | 0.0 |
| Aug | 103° / 81° | 1.1 | 4.3 | 13.2 | 0.2 |
| Sep | 99° / 74° | 0.9 | 3.1 | 12.2 | 1.8 |
| Oct | 89° / 63° | 0.5 | 2.1 | 11.2 | 5.5 |
| Nov | 76° / 51° | 0.5 | 1.8 | 10.3 | 8.6 |
| Dec | 66° / 43° | 0.9 | 3.6 | 9.9 | 7.4 |
Cloud cover in Winter
The sky is clear or mostly clear about 57% of the time across winter.
Chance of precipitation in Winter
Casa Grande gets around 3.0 in of rain over 11 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 5 mph across winter.
Sunrise & sunset in Winter
Daylight runs from about 10 hours in early December to 11 h 12 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Winter
Average shortwave solar energy reaching the ground each day across winter, about 3.8 kWh/m².
Is winter a good time to visit Casa Grande?
Our two travel scores rate winter for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
winter is one of the better times to visit Casa Grande for general sightseeing.
What to pack for Casa Grande in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, Casa Grande sees daytime highs around 68°F and nights near 44°F. Worth packing: a warm layer. About 11 days see rain.
UV index in Casa Grande in Winter
Clear-sky midday UV across winter averages around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Casa Grande peaks around June 23 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 3 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 4 | 5 | 5 | 8 | 9 | 11 | 11 | 11 | 9 | 7 | 5 | 3 |
| Level | Moderate | Moderate | Moderate | Very high | Very high | Extreme | Extreme | Extreme | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 4 | Moderate |
| Feb | 5 | Moderate |
| Mar | 5 | Moderate |
| Apr | 8 | Very high |
| May | 9 | Very high |
| Jun | 11 | Extreme |
| Jul | 11 | Extreme |
| Aug | 11 | Extreme |
| Sep | 9 | Very high |
| Oct | 7 | High |
| Nov | 5 | Moderate |
| Dec | 3 | Moderate |
Air quality in Casa Grande in Winter
Average fine-particle pollution (PM2.5) through the year — so you can see where winter falls, not just the annual average.
Air quality in Casa Grande is worst in June — around 28 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (October, 12 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 13 | 13 | 14 | 14 | 14 | 28 | 14 | 13 | 13 | 12 | 13 | 13 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 13 | Moderate |
| Feb | 13 | Moderate |
| Mar | 14 | Moderate |
| Apr | 14 | Moderate |
| May | 14 | Moderate |
| Jun | 28 | Moderate |
| Jul | 14 | Moderate |
| Aug | 13 | Moderate |
| Sep | 13 | Moderate |
| Oct | 12 | Moderate |
| Nov | 13 | Moderate |
| Dec | 13 | Moderate |
Where is Casa Grande?
Casa Grande sits at 32.9°N, 111.8°W, 1,398 ft above sea level, in United States. The nearest listed city is Eloy, 14 mi away.
Topography around Casa Grande
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Casa Grande.
Within 2 miles, the terrain around Casa Grande has only modest variations in elevation — a maximum elevation change of 102 ft around an average of 1,398 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 2,182 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 4,928 ft.
The land around Casa Grande is covered by bare terrain (44%) and artificial surfaces (38%) within 2 miles, bare terrain (43%) and shrubs (25%) within 10 miles, and shrubs (59%) and bare terrain (20%) within 50 miles.
United States travel facts
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 100% of US
- price level, 2025
- GDP per capita
- $90,027
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 5.8
- per 100k, 2023
- Road deaths
- 12.7
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Casa Grande (32.8795°, -111.7574°, elevation 1,398 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.