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Monthly climate in Siuna, Nicaragua

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Siuna features a tropical monsoon climate (Am). Temperatures typically range between 24 °C (75 °F) and 26 °C (80 °F) through the year, but rarely can drop to 15 °C (59 °F) or can rise to as high as 35 °C (96 °F). The average annual precipitation amounts to about 1762 mm (69.4 inches) and receives 273 rainy days on the 1 mm (0.04 inches) threshold annually. Siuna enjoys an average of 3205 hours of sunshine throughout the year, and daylight varies from 11 hours 19 minutes to 12 hours 54 minutes per day.

Monthly average temperatures in Siuna, Nicaragua

The warmest months in Siuna are April, May and June, with daily mean temperatures ranging from 26 to 26 °C (79 - 80 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 24 to 24 °C (75 - 76 °F) throughout the day. On average each year, Siuna experiences 327 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 Siuna. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum30°C
(86°F)		32°C
(91°F)		32°C
(90°F)		35°C
(95°F)		35°C
(96°F)		34°C
(94°F)		32°C
(90°F)		32°C
(91°F)		33°C
(92°F)		33°C
(91°F)		32°C
(90°F)		30°C
(86°F)
Mean maximum29°C
(85°F)		31°C
(88°F)		31°C
(89°F)		34°C
(93°F)		34°C
(94°F)		32°C
(90°F)		31°C
(89°F)		32°C
(89°F)		32°C
(91°F)		32°C
(90°F)		31°C
(88°F)		30°C
(85°F)
Average high28°C
(82°F)		29°C
(84°F)		29°C
(85°F)		31°C
(89°F)		31°C
(88°F)		30°C
(86°F)		30°C
(85°F)		30°C
(86°F)		30°C
(87°F)		30°C
(86°F)		29°C
(84°F)		28°C
(82°F)
Daily mean24°C
(75°F)		24°C
(76°F)		25°C
(77°F)		26°C
(80°F)		26°C
(80°F)		26°C
(79°F)		26°C
(78°F)		25°C
(78°F)		26°C
(79°F)		25°C
(78°F)		25°C
(77°F)		24°C
(75°F)
Average low20°C
(69°F)		20°C
(69°F)		21°C
(70°F)		22°C
(72°F)		23°C
(74°F)		23°C
(73°F)		23°C
(73°F)		23°C
(73°F)		22°C
(72°F)		22°C
(72°F)		22°C
(71°F)		21°C
(70°F)
Mean minimum17°C
(62°F)		17°C
(63°F)		18°C
(65°F)		19°C
(67°F)		21°C
(70°F)		22°C
(71°F)		21°C
(71°F)		21°C
(71°F)		21°C
(70°F)		21°C
(70°F)		19°C
(67°F)		18°C
(65°F)
Minimum15°C
(59°F)		16°C
(61°F)		16°C
(61°F)		18°C
(65°F)		20°C
(68°F)		21°C
(70°F)		21°C
(70°F)		21°C
(69°F)		21°C
(69°F)		20°C
(68°F)		18°C
(65°F)		17°C
(64°F)

Compare climate in Siuna with other places

Compare temperature, precipitation, sunshine, UV index in Siuna, Nicaragua with other places around the world.

Monthly average precipitation in Siuna, Nicaragua

Siuna usually has the most precipitation in May, June and October, with an average of 27 rainy days and 247 mm (9.7 inches) of precipitation per month. The driest months in Siuna are January, February and April. On average, 52 mm (2.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Siuna. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)49 (1.9)50 (2.0)61 (2.4)57 (2.2)259 (10.2)240 (9.4)189 (7.4)187 (7.3)183 (7.2)244 (9.6)177 (7.0)67 (2.7)
Average precipitation days (≥ 1 mm)151618142529292827282222

Monthly sunshine hours in Siuna, Nicaragua

The sunniest months in Siuna are March, April and May, when the sun shines an average of 9 hours 47 minutes a day. Least sunny months in Siuna: January, June and August receive an average of 7 hours 45 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Siuna. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours222273301314285244249247275251271268
Mean daily daylight hours11h 24m11h 41m12h 3m12h 26m12h 45m12h 54m12h 49m12h 32m12h 10m11h 47m11h 28m11h 19m

Solar UV radiation in Siuna, Nicaragua

Siuna experiences the highest level of ultraviolet (UV) radiation in March, April and May, when the maximum UV index can reach values of 14 - 14, which corresponds to the Extreme category of sun exposure. January, November and December are in the Very High exposure category. In these months, the maximum values of the UV index do not exceed 10. For more detailed information, check out our hourly Siuna UV Index data.

Average daily maximum UV levels by month for Siuna. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)10121414141313131313109