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Monthly climate in Jau, Brazil

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Jau features a tropical savanna climate (Aw). Temperatures typically range between 20 °C (67 °F) and 25 °C (78 °F) through the year, but rarely can drop to 3 °C (38 °F) or can rise to as high as 40 °C (104 °F). The average annual precipitation amounts to about 916 mm (36.1 inches) and receives 105 rainy days on the 1 mm (0.04 inches) threshold annually. Jau enjoys an average of 3603 hours of sunshine throughout the year, and daylight varies from 10 hours 46 minutes to 13 hours 27 minutes per day.

Monthly average temperatures in Jau, Brazil

The warmest months in Jau are January, March and December, with daily mean temperatures ranging from 25 to 25 °C (77 - 78 °F) throughout the day. The coldest temperatures usually occur in June, July and August, when daily mean temperatures range from 20 to 20 °C (67 - 69 °F) throughout the day. On average each year, Jau experiences 289 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 Jau. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum37°C
(98°F)		38°C
(100°F)		36°C
(98°F)		33°C
(91°F)		33°C
(91°F)		31°C
(88°F)		32°C
(90°F)		34°C
(94°F)		38°C
(100°F)		40°C
(104°F)		36°C
(97°F)		36°C
(97°F)
Mean maximum35°C
(94°F)		35°C
(94°F)		34°C
(93°F)		32°C
(90°F)		31°C
(88°F)		29°C
(85°F)		30°C
(87°F)		33°C
(93°F)		37°C
(98°F)		36°C
(98°F)		35°C
(95°F)		34°C
(94°F)
Average high30°C
(87°F)		30°C
(86°F)		31°C
(87°F)		29°C
(85°F)		27°C
(80°F)		26°C
(80°F)		27°C
(80°F)		27°C
(81°F)		31°C
(89°F)		31°C
(87°F)		30°C
(86°F)		30°C
(87°F)
Daily mean25°C
(78°F)		25°C
(77°F)		25°C
(78°F)		23°C
(74°F)		21°C
(69°F)		20°C
(69°F)		20°C
(67°F)		20°C
(69°F)		24°C
(76°F)		24°C
(76°F)		24°C
(76°F)		25°C
(77°F)
Average low21°C
(71°F)		21°C
(69°F)		21°C
(69°F)		18°C
(65°F)		15°C
(60°F)		15°C
(60°F)		13°C
(56°F)		14°C
(58°F)		18°C
(64°F)		19°C
(66°F)		19°C
(66°F)		21°C
(69°F)
Mean minimum18°C
(65°F)		18°C
(65°F)		18°C
(64°F)		14°C
(58°F)		10°C
(50°F)		12°C
(53°F)		7°C
(45°F)		9°C
(48°F)		13°C
(56°F)		15°C
(59°F)		15°C
(59°F)		16°C
(62°F)
Minimum17°C
(63°F)		17°C
(63°F)		16°C
(61°F)		12°C
(55°F)		7°C
(44°F)		9°C
(48°F)		3°C
(38°F)		6°C
(43°F)		10°C
(51°F)		13°C
(56°F)		12°C
(54°F)		15°C
(59°F)

Compare climate in Jau with other places

Compare temperature, precipitation, sunshine, UV index in Jau, Brazil with other places around the world.

Monthly average precipitation in Jau, Brazil

Jau usually has the most precipitation in January, February and December, with an average of 16 rainy days and 153 mm (6.0 inches) of precipitation per month. The driest months in Jau are June, July and September. On average, 17 mm (0.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Jau. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)182 (7.2)139 (5.5)87 (3.4)46 (1.8)33 (1.3)16 (0.6)8 (0.3)38 (1.5)28 (1.1)86 (3.4)116 (4.6)137 (5.4)
Average precipitation days (≥ 1 mm)161513543044111218

Monthly sunshine hours in Jau, Brazil

The sunniest months in Jau are March, September and December, when the sun shines an average of 10 hours 28 minutes a day. Least sunny months in Jau: January, February and June receive an average of 8 hours 59 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Jau. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours241285324305296282309297315306314324
Mean daily daylight hours13h 18m12h 48m12h 10m11h 32m11h 1m10h 46m10h 54m11h 21m11h 58m12h 36m13h 10m13h 27m

Solar UV radiation in Jau, Brazil

Jau experiences the highest level of ultraviolet (UV) radiation in January, February and December, when the maximum UV index can reach values of 15 - 16, which corresponds to the Extreme category of sun exposure. May, June and July are in the High / Very High exposure category. In these months, the maximum values of the UV index do not exceed 8. For more detailed information, check out our hourly Jau UV Index data.

Average daily maximum UV levels by month for Jau. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)151613118771012131416