About Islita, Sonora's Climate & Weather History

With a population of around 1,800, Islita sits in Sonora, Mexico. The city operates in the America/Hermosillo time zone.

In 2025, Islita recorded an average annual temperature of 76°F — right at the 30-year normal of 76°F. The hottest day reached 118°F in July; the coldest was 39°F in January. Total precipitation was 5 inches (near normal). The wettest month was September.