Saguaro National Park (AZ) Weather & Climate: Best Time to Visit

Visitors to Saguaro National Park can expect significant temperature changes throughout the year. Average maximum daytime temperatures range from a very hot 39°C (102°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 24°C (75°F) in June to around 4°C (39°F) during December.

Check out our detailed temperature page for more information.

Temperature ranges by month

Saguaro National Park typically sees modest rainfall throughout the year, with an average annual precipitation of 282 mm (11 in). Significant seasonal changes in precipitation occur throughout the year. In the wettest month, July it receives moderate rainfall, averaging 66 mm (2.6 in) of precipitation, recorded across 12 rainy days. In contrast, the driest month May brings less rainfall, with 1.9 mm (0.1 in) over a single rainy day. For more details, please visit our Saguaro National Park Precipitation page.

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

The average number of days each month with precipitation

While the amount of sunshine in Saguaro National Park varies throughout the year, all seasons offer their own charm. Enjoy up to 13.4 hours of daily sun in May, and experience slightly darker atmosphere in December, with about 8.2 hours of daily sunlight.

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 Saguaro National Park.

The city experiences its highest humidity in December, reaching 50%. In June, the humidity drops to its lowest level at 21%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year