nomadseason

Monthly climate in Hermosillo, Mexico

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Hermosillo features a hot desert climate (BWh). Temperatures typically range between 16 °C (62 °F) and 33 °C (91 °F) through the year, but rarely can drop to 2 °C (35 °F) or can rise to as high as 45 °C (114 °F). The average annual precipitation amounts to about 235 mm (9.2 inches) and receives 33 rainy days on the 1 mm (0.04 inches) threshold annually. Hermosillo enjoys an average of 3646 hours of sunshine throughout the year, and daylight varies from 10 hours 18 minutes to 13 hours 57 minutes per day.

Monthly average temperatures in Hermosillo, Mexico

The warmest months in Hermosillo are June, July and August, with daily mean temperatures ranging from 32 to 33 °C (90 - 91 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 16 to 18 °C (62 - 64 °F) throughout the day. On average each year, Hermosillo experiences 279 days above 25 °C (77.0 °F) and 0 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Hermosillo. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum34°C
(93°F)		34°C
(93°F)		38°C
(101°F)		41°C
(106°F)		42°C
(108°F)		44°C
(112°F)		45°C
(114°F)		44°C
(111°F)		44°C
(111°F)		42°C
(109°F)		41°C
(105°F)		31°C
(87°F)
Mean maximum30°C
(87°F)		32°C
(89°F)		35°C
(95°F)		39°C
(103°F)		40°C
(104°F)		42°C
(107°F)		43°C
(110°F)		43°C
(110°F)		41°C
(106°F)		40°C
(104°F)		35°C
(96°F)		30°C
(86°F)
Average high25°C
(77°F)		26°C
(79°F)		29°C
(84°F)		33°C
(92°F)		35°C
(95°F)		39°C
(103°F)		38°C
(101°F)		39°C
(102°F)		37°C
(98°F)		35°C
(95°F)		30°C
(86°F)		25°C
(76°F)
Daily mean16°C
(62°F)		18°C
(64°F)		20°C
(69°F)		25°C
(77°F)		27°C
(81°F)		32°C
(90°F)		33°C
(91°F)		33°C
(91°F)		30°C
(87°F)		27°C
(81°F)		22°C
(72°F)		17°C
(62°F)
Average low9°C
(49°F)		10°C
(51°F)		12°C
(55°F)		16°C
(61°F)		18°C
(65°F)		24°C
(75°F)		27°C
(82°F)		27°C
(82°F)		25°C
(78°F)		20°C
(68°F)		14°C
(58°F)		10°C
(50°F)
Mean minimum5°C
(41°F)		5°C
(41°F)		8°C
(46°F)		11°C
(53°F)		14°C
(57°F)		19°C
(67°F)		24°C
(76°F)		25°C
(77°F)		20°C
(69°F)		13°C
(56°F)		10°C
(50°F)		5°C
(40°F)
Minimum3°C
(38°F)		2°C
(35°F)		5°C
(41°F)		10°C
(50°F)		12°C
(54°F)		17°C
(62°F)		23°C
(73°F)		24°C
(76°F)		16°C
(60°F)		9°C
(48°F)		7°C
(45°F)		2°C
(37°F)

Compare climate in Hermosillo with other places

Compare temperature, precipitation, sunshine, UV index in Hermosillo, Mexico with other places around the world.

Monthly average precipitation in Hermosillo, Mexico

Hermosillo usually has the most precipitation in July, August and September, with an average of 8 rainy days and 47 mm (1.8 inches) of precipitation per month. The driest months in Hermosillo are April, May and June. On average, 2 mm (0.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Hermosillo. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)17 (0.7)14 (0.6)13 (0.5)0 (0.0)0 (0.0)5 (0.2)51 (2.0)42 (1.7)47 (1.9)17 (0.7)15 (0.6)12 (0.5)
Average precipitation days (≥ 1 mm)1110011196111

Monthly sunshine hours in Hermosillo, Mexico

The sunniest months in Hermosillo are May, June and July, when the sun shines an average of 11 hours 44 minutes a day. Least sunny months in Hermosillo: January, February and December receive an average of 7 hours 57 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Hermosillo. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours215249300331369365345334309301265259
Mean daily daylight hours10h 30m11h 9m12h 0m12h 53m13h 36m13h 57m13h 46m13h 7m12h 17m11h 25m10h 40m10h 18m

Solar UV radiation in Hermosillo, Mexico

Hermosillo experiences the highest level of ultraviolet (UV) radiation in April, May and August, when the maximum UV index can reach values of 12 - 12, which corresponds to the Extreme category of sun exposure. January, November and December are in the Moderate / High exposure category. In these months, the maximum values of the UV index do not exceed 6. For more detailed information, check out our hourly Hermosillo UV Index data.

Average daily maximum UV levels by month for Hermosillo. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)5810121212121211965