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Monthly climate in Uniao, Piauí, Brazil

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Uniao features a tropical savanna climate (Aw).Temperatures typically range between 27 °C (80 °F) and 31 °C (88 °F) through the year, but rarely can drop to 19 °C (67 °F) or can rise to as high as 40 °C (104 °F).The average annual precipitation amounts to about 1499 mm (59.0 inches) and receives 133 rainy days on the 1 mm (0.04 inches) threshold annually.Uniao enjoys an average of 3746 hours of sunshine throughout the year, and daylight varies from 11 hours 51 minutes to 12 hours 22 minutes per day.

Monthly average temperatures in Uniao, Piauí, Brazil §

The warmest months in Uniao are September, October and November, with daily mean temperatures ranging from 30 to 31 °C (86 - 88 °F) throughout the day. The coldest temperatures usually occur in February, March and April, when daily mean temperatures range from 27 to 27 °C (80 - 81 °F) throughout the day. On average each year, Uniao experiences 329 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 Uniao, Piauí, Brazil.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 38°C
(100°F)		 35°C
(96°F)		 34°C
(93°F)		 34°C
(94°F)		 35°C
(95°F)		 35°C
(95°F)		 35°C
(95°F)		 37°C
(100°F)		 39°C
(102°F)		 39°C
(103°F)		 39°C
(103°F)		 40°C
(104°F)
Mean maximum 36°C
(97°F)		 34°C
(94°F)		 33°C
(92°F)		 33°C
(92°F)		 33°C
(93°F)		 34°C
(93°F)		 35°C
(95°F)		 36°C
(98°F)		 38°C
(100°F)		 39°C
(102°F)		 38°C
(101°F)		 37°C
(99°F)
Average high 32°C
(90°F)		 32°C
(89°F)		 31°C
(88°F)		 31°C
(89°F)		 32°C
(89°F)		 33°C
(91°F)		 33°C
(92°F)		 35°C
(95°F)		 36°C
(98°F)		 37°C
(99°F)		 36°C
(97°F)		 34°C
(94°F)
Daily mean 27°C
(81°F)		 27°C
(80°F)		 27°C
(80°F)		 27°C
(81°F)		 27°C
(81°F)		 28°C
(82°F)		 28°C
(83°F)		 29°C
(84°F)		 30°C
(87°F)		 31°C
(88°F)		 30°C
(86°F)		 29°C
(85°F)
Average low 24°C
(75°F)		 23°C
(75°F)		 23°C
(74°F)		 24°C
(75°F)		 24°C
(75°F)		 23°C
(74°F)		 23°C
(74°F)		 23°C
(74°F)		 24°C
(76°F)		 25°C
(78°F)		 25°C
(78°F)		 25°C
(77°F)
Mean minimum 22°C
(73°F)		 22°C
(72°F)		 22°C
(73°F)		 22°C
(73°F)		 22°C
(72°F)		 22°C
(71°F)		 20°C
(68°F)		 21°C
(70°F)		 22°C
(72°F)		 24°C
(75°F)		 24°C
(75°F)		 23°C
(74°F)
Minimum 22°C
(72°F)		 22°C
(72°F)		 22°C
(72°F)		 22°C
(71°F)		 22°C
(71°F)		 20°C
(69°F)		 19°C
(67°F)		 20°C
(68°F)		 20°C
(69°F)		 23°C
(74°F)		 23°C
(74°F)		 23°C
(73°F)

Compare climate in Uniao with other places

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

Monthly average precipitation in Uniao, Piauí, Brazil §

Uniao usually has the most precipitation in February, March and April, with an average of 25 rainy days and 337 mm (13.3 inches) of precipitation per month.The driest months in Uniao are August, September and October. On average, 4 mm (0.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Uniao, Piauí, Brazil.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 201 (7.9) 325 (12.8) 385 (15.1) 301 (11.8) 109 (4.3) 15 (0.6) 17 (0.7) 3 (0.1) 2 (0.1) 5 (0.2) 48 (1.9) 87 (3.4)
Average precipitation days (≥ 1 mm) 20 24 29 24 15 3 2 0 0 1 6 9

Monthly sunshine hours in Uniao, Piauí, Brazil §

The sunniest months in Uniao are August, September and October, when the sun shines an average of 11 hours 20 minutes a day.Least sunny months in Uniao: January, February and April receive an average of 8 hours 40 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Uniao, Piauí, Brazil.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 249 251 282 280 326 326 337 346 342 354 329 319
Mean daily daylight hours 12h 20m 12h 14m 12h 6m 11h 59m 11h 53m 11h 51m 11h 52m 11h 57m 12h 4m 12h 11m 12h 18m 12h 22m

Solar UV radiation in Uniao, Piauí, Brazil §

Uniao experiences the highest level of ultraviolet (UV) radiation in January, March and April, when the maximum UV index can reach values of 14 - 16, which corresponds to the Extreme category of sun exposure.June, July and October are in the Extreme exposure category. In these months, the maximum values of the UV index do not exceed 12. For more detailed information, check out our hourly Uniao UV Index data.

Average daily maximum UV levels by month for Uniao, Piauí, Brazil.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 14 14 16 15 13 11 11 13 13 12 13 13