Last updated: March 2, 2024
Under the Köppen–Geiger climate classification Casa Grande features a hot desert climate (BWh). Temperatures typically range between 12 °C (55 °F) and 34 °C (94 °F) through the year, but rarely can drop to -1 °C (30 °F) or can rise to as high as 48 °C (119 °F). The average annual precipitation amounts to about 221 mm (8.7 inches) and receives 28 rainy days on the 1 mm (0.04 inches) threshold annually. Casa Grande enjoys an average of 3629 hours of sunshine throughout the year, and daylight varies from 9 hours 59 minutes to 14 hours 17 minutes per day.
The warmest months in Casa Grande are June, July and August, with daily mean temperatures ranging from 33 to 34 °C (92 - 94 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 12 to 14 °C (55 - 58 °F) throughout the day. On average each year, Casa Grande experiences 225 days above 25 °C (77.0 °F) and 1 days below 0 °C (32.0 °F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum | 28°C (83°F) |
30°C (87°F) |
36°C (96°F) |
39°C (103°F) |
43°C (109°F) |
48°C (119°F) |
47°C (116°F) |
46°C (116°F) |
45°C (113°F) |
40°C (105°F) |
36°C (97°F) |
28°C (82°F) |
| Mean maximum | 25°C (77°F) |
28°C (82°F) |
32°C (91°F) |
37°C (100°F) |
40°C (105°F) |
44°C (111°F) |
46°C (115°F) |
45°C (113°F) |
43°C (110°F) |
37°C (100°F) |
32°C (90°F) |
26°C (78°F) |
| Average high | 20°C (68°F) |
21°C (71°F) |
26°C (78°F) |
31°C (88°F) |
35°C (95°F) |
41°C (105°F) |
41°C (105°F) |
40°C (105°F) |
38°C (100°F) |
32°C (90°F) |
26°C (80°F) |
20°C (67°F) |
| Daily mean | 12°C (55°F) |
14°C (58°F) |
18°C (65°F) |
24°C (75°F) |
27°C (81°F) |
33°C (92°F) |
34°C (94°F) |
34°C (94°F) |
31°C (88°F) |
24°C (76°F) |
19°C (66°F) |
13°C (55°F) |
| Average low | 7°C (44°F) |
8°C (46°F) |
11°C (52°F) |
15°C (59°F) |
19°C (66°F) |
24°C (75°F) |
28°C (83°F) |
28°C (82°F) |
24°C (76°F) |
17°C (63°F) |
12°C (54°F) |
7°C (45°F) |
| Mean minimum | 1°C (34°F) |
1°C (34°F) |
5°C (41°F) |
9°C (49°F) |
13°C (55°F) |
19°C (66°F) |
22°C (73°F) |
24°C (75°F) |
18°C (65°F) |
9°C (49°F) |
7°C (45°F) |
1°C (34°F) |
| Minimum | -1°C (30°F) |
-1°C (31°F) |
3°C (37°F) |
7°C (45°F) |
12°C (54°F) |
17°C (62°F) |
21°C (70°F) |
23°C (73°F) |
12°C (55°F) |
5°C (41°F) |
5°C (41°F) |
-0°C (32°F) |
Compare temperature, precipitation, sunshine, UV index in Casa Grande, Arizona, United States with other places around the world.
Casa Grande usually has the most precipitation in February, July and August, with an average of 4 rainy days and 34 mm (1.3 inches) of precipitation per month. The driest months in Casa Grande are April, May and June. On average, 3 mm (0.1 inches) of precipitation falls during these months.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average precipitation mm (inches) | 20 (0.8) | 29 (1.1) | 19 (0.7) | 1 (0.1) | 1 (0.1) | 5 (0.2) | 38 (1.5) | 36 (1.4) | 21 (0.8) | 15 (0.6) | 13 (0.5) | 24 (0.9) |
| Average precipitation days (≥ 1 mm) | 3 | 3 | 3 | 0 | 0 | 0 | 6 | 5 | 2 | 2 | 1 | 3 |
The sunniest months in Casa Grande are May, June and July, when the sun shines an average of 11 hours 57 minutes a day. Least sunny months in Casa Grande: January, February and December receive an average of 7 hours 27 minutes of sunshine daily.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean monthly sunshine hours | 197 | 239 | 306 | 330 | 371 | 371 | 356 | 342 | 314 | 298 | 259 | 240 |
| Mean daily daylight hours | 10h 14m | 11h 0m | 12h 0m | 13h 1m | 13h 52m | 14h 17m | 14h 3m | 13h 18m | 12h 19m | 11h 18m | 10h 25m | 9h 59m |
Casa Grande experiences the highest level of ultraviolet (UV) radiation in April, June and August, when the maximum UV index can reach values of 11 - 12, which corresponds to the Extreme category of sun exposure. January, November and December are in the Moderate exposure category. In these months, the maximum values of the UV index do not exceed 5. For more detailed information, check out our hourly Casa Grande UV Index data.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV Index (month maximum) | 4 | 6 | 9 | 11 | 11 | 12 | 11 | 11 | 10 | 8 | 5 | 4 |
Discover in-depth weather details for every month in Casa Grande. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about Casa Grande's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.
Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.