Casa Grande (AZ) Weather & Climate: Best Time to Visit

Depending on the time of the year, temperatures range from very hot to pleasant in Casa Grande. Average maximum daytime temperatures range from a very hot 40°C (104°F) in June, the warmest time of the year, to a pleasant 18°C (64°F) during cooler months like December.

At night, you can expect temperatures ranging from 26°C (79°F) in June to around 3°C (37°F) during December.

Check out our detailed temperature page for more information.

Temperature ranges by month

Casa Grande has a dry climate with very low precipitation, averaging 176 mm (6.9 in) of rain/snowfall annually. Significant seasonal changes in precipitation occur throughout the year. In the wettest month, July it receives low rainfall, averaging 28 mm (1.1 in) of precipitation, recorded across 5 rainy days. In contrast, the driest month June brings less rainfall, with 3.1 mm (0.1 in) over a single rainy day. For more details, please visit our Casa Grande Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

Seasonal changes in sunshine hours are quite dramatic in Casa Grande. While June receives considerable daily sunshine with up to 13.6 hours, December marks the darkest time of the year, where sunshine is scarce with only 8.1 hours of sunlight per day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

Daily percentage of sunshine

The relative humidity is low throughout the year in Casa Grande.

The city experiences its highest humidity in December, reaching 51%. In June, the humidity drops to its lowest level at 19%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year