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Monthly climate in Janos, Mexico

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Janos features a cold semi-arid climate (BSk). Temperatures typically range between 8 °C (47 °F) and 29 °C (84 °F) through the year, but rarely can drop to -6 °C (21 °F) or can rise to as high as 41 °C (106 °F). The average annual precipitation amounts to about 227 mm (8.9 inches) and receives 37 rainy days on the 1 mm (0.04 inches) threshold annually. Janos enjoys an average of 3657 hours of sunshine throughout the year, and daylight varies from 10 hours 10 minutes to 14 hours 6 minutes per day.

Monthly average temperatures in Janos, Mexico

The warmest months in Janos are June, July and August, with daily mean temperatures ranging from 27 to 29 °C (81 - 84 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 8 to 11 °C (47 - 52 °F) throughout the day. On average each year, Janos experiences 187 days above 25 °C (77.0 °F) and 23 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Janos. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum25°C
(78°F)		29°C
(84°F)		31°C
(89°F)		35°C
(95°F)		37°C
(100°F)		41°C
(106°F)		41°C
(106°F)		39°C
(103°F)		36°C
(97°F)		34°C
(93°F)		30°C
(85°F)		24°C
(75°F)
Mean maximum23°C
(73°F)		25°C
(77°F)		30°C
(86°F)		33°C
(92°F)		36°C
(97°F)		39°C
(102°F)		39°C
(103°F)		38°C
(100°F)		35°C
(96°F)		33°C
(91°F)		28°C
(83°F)		22°C
(72°F)
Average high16°C
(61°F)		19°C
(66°F)		23°C
(73°F)		27°C
(82°F)		31°C
(89°F)		36°C
(96°F)		34°C
(93°F)		33°C
(92°F)		31°C
(88°F)		27°C
(80°F)		22°C
(71°F)		16°C
(61°F)
Daily mean8°C
(47°F)		11°C
(52°F)		15°C
(60°F)		20°C
(68°F)		24°C
(76°F)		29°C
(84°F)		27°C
(82°F)		27°C
(81°F)		24°C
(76°F)		20°C
(67°F)		14°C
(58°F)		9°C
(48°F)
Average low2°C
(35°F)		4°C
(39°F)		7°C
(46°F)		11°C
(53°F)		15°C
(59°F)		20°C
(68°F)		21°C
(70°F)		21°C
(69°F)		18°C
(64°F)		12°C
(54°F)		7°C
(45°F)		3°C
(38°F)
Mean minimum-5°C
(24°F)		-3°C
(27°F)		1°C
(34°F)		5°C
(41°F)		9°C
(49°F)		14°C
(58°F)		18°C
(65°F)		18°C
(65°F)		13°C
(56°F)		4°C
(39°F)		1°C
(34°F)		-3°C
(27°F)
Minimum-6°C
(21°F)		-6°C
(21°F)		-2°C
(29°F)		3°C
(38°F)		6°C
(42°F)		12°C
(53°F)		17°C
(63°F)		17°C
(63°F)		12°C
(53°F)		-2°C
(28°F)		-2°C
(29°F)		-4°C
(25°F)

Compare climate in Janos with other places

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

Monthly average precipitation in Janos, Mexico

Janos usually has the most precipitation in July, August and September, with an average of 7 rainy days and 38 mm (1.5 inches) of precipitation per month. The driest months in Janos are April, May and June. On average, 6 mm (0.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Janos. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)17 (0.7)13 (0.5)13 (0.5)3 (0.1)6 (0.2)9 (0.4)51 (2.0)34 (1.3)29 (1.1)14 (0.6)14 (0.5)23 (0.9)
Average precipitation days (≥ 1 mm)2220021076213

Monthly sunshine hours in Janos, Mexico

The sunniest months in Janos are May, June and July, when the sun shines an average of 11 hours 51 minutes a day. Least sunny months in Janos: January, February and December receive an average of 7 hours 53 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Janos. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours211254299335370364356337309300266251
Mean daily daylight hours10h 23m11h 5m12h 0m12h 56m13h 43m14h 6m13h 53m13h 12m12h 18m11h 22m10h 34m10h 10m

Solar UV radiation in Janos, Mexico

Janos experiences the highest level of ultraviolet (UV) radiation in May, June and July, when the maximum UV index can reach values of 13 - 13, 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 7. For more detailed information, check out our hourly Janos UV Index data.

Average daily maximum UV levels by month for Janos. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)5810121313131211975