Last updated: June 24, 2025
In Casa Grande, United States, the average temperature in December hovers around 13°C (55°F), with variations ranging from a chilly 0°C (32°F) to a warm 28°C (82°F). Expect about 24 mm (0.9 in) of rain over 3 days, contributing to a notably high average humidity of 82%. Make sure to prepare for both the cool and warm days ahead!
In December in Casa Grande, the average temperature is 13°C (55°F). Maximum temperatures can reach 28°C (82°F), while minimums can drop to as low as 0°C (32°F). This makes Casa Grande an ideal destination for those who enjoy mild to warm weather with the possibility of cooler evenings.
In Casa Grande in December, the precipitation amount is 24 mm (0.9 in) over a span of 3 days.
In Casa Grande in December, humidity is 82%. With an average temperature of 13°C (55°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities sticky and uncomfortable for traveling.
In Casa Grande in December, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Casa Grande for better planning.
UV Risk Categories
Weather in Casa Grande varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Casa Grande, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 12°C (55°F) | 20 mm (0.8 inches) | 76% | moderate |
| February Weather | 14°C (58°F) | 29 mm (1.1 inches) | 79% | high |
| March Weather | 18°C (65°F) | 19 mm (0.7 inches) | 67% | very high |
| April Weather | 24°C (75°F) | 1 mm (0.1 inches) | 55% | extreme |
| May Weather | 27°C (81°F) | 1 mm (0.1 inches) | 40% | extreme |
| June Weather | 33°C (92°F) | 5 mm (0.2 inches) | 33% | extreme |
| July Weather | 34°C (94°F) | 38 mm (1.5 inches) | 34% | extreme |
| August Weather | 34°C (94°F) | 36 mm (1.4 inches) | 48% | extreme |
| September Weather | 31°C (88°F) | 21 mm (0.8 inches) | 64% | very high |
| October Weather | 24°C (76°F) | 15 mm (0.6 inches) | 67% | very high |
| November Weather | 19°C (66°F) | 13 mm (0.5 inches) | 77% | moderate |
| December Weather | 13°C (55°F) | 24 mm (0.9 inches) | 82% | moderate |