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Monthly climate in San Ignacio, Costa Rica

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification San Ignacio features a tropical monsoon climate (Am). Temperatures typically range between 21 °C (70 °F) and 22 °C (72 °F) through the year, but rarely can drop to 15 °C (60 °F) or can rise to as high as 28 °C (83 °F). The average annual precipitation amounts to about 5792 mm (228.0 inches) and receives 324 rainy days on the 1 mm (0.04 inches) threshold annually. San Ignacio enjoys an average of 2922 hours of sunshine throughout the year, and daylight varies from 11 hours 32 minutes to 12 hours 40 minutes per day.

Monthly average temperatures in San Ignacio, Costa Rica

The warmest months in San Ignacio are March, April and June, with daily mean temperatures ranging from 22 to 22 °C (72 - 72 °F) throughout the day. The coldest temperatures usually occur in January, October and November, when daily mean temperatures range from 21 to 21 °C (70 - 71 °F) throughout the day. On average each year, San Ignacio experiences 216 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 San Ignacio. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum28°C
(82°F)		28°C
(83°F)		28°C
(83°F)		28°C
(83°F)		28°C
(83°F)		28°C
(82°F)		28°C
(82°F)		27°C
(82°F)		27°C
(81°F)		28°C
(82°F)		27°C
(81°F)		27°C
(80°F)
Mean maximum27°C
(80°F)		27°C
(81°F)		27°C
(82°F)		27°C
(82°F)		27°C
(82°F)		27°C
(81°F)		27°C
(81°F)		27°C
(81°F)		27°C
(80°F)		27°C
(81°F)		26°C
(80°F)		26°C
(79°F)
Average high25°C
(77°F)		26°C
(79°F)		26°C
(79°F)		26°C
(79°F)		25°C
(78°F)		26°C
(78°F)		25°C
(78°F)		25°C
(78°F)		25°C
(78°F)		25°C
(77°F)		25°C
(77°F)		25°C
(77°F)
Daily mean21°C
(71°F)		22°C
(71°F)		22°C
(72°F)		22°C
(72°F)		22°C
(72°F)		22°C
(72°F)		22°C
(72°F)		22°C
(71°F)		21°C
(71°F)		21°C
(70°F)		21°C
(71°F)		21°C
(71°F)
Average low18°C
(65°F)		18°C
(65°F)		19°C
(66°F)		19°C
(67°F)		20°C
(68°F)		20°C
(68°F)		20°C
(67°F)		19°C
(67°F)		19°C
(66°F)		19°C
(66°F)		19°C
(66°F)		19°C
(66°F)
Mean minimum16°C
(62°F)		16°C
(62°F)		17°C
(63°F)		17°C
(64°F)		18°C
(65°F)		18°C
(66°F)		18°C
(65°F)		18°C
(64°F)		18°C
(64°F)		18°C
(64°F)		17°C
(63°F)		17°C
(63°F)
Minimum15°C
(60°F)		15°C
(60°F)		16°C
(61°F)		17°C
(63°F)		17°C
(64°F)		18°C
(64°F)		18°C
(64°F)		18°C
(64°F)		17°C
(63°F)		17°C
(63°F)		17°C
(62°F)		16°C
(62°F)

Compare climate in San Ignacio with other places

Compare temperature, precipitation, sunshine, UV index in San Ignacio, Costa Rica with other places around the world.

Monthly average precipitation in San Ignacio, Costa Rica

San Ignacio usually has the most precipitation in August, September and October, with an average of 30 rainy days and 830 mm (32.7 inches) of precipitation per month. The driest months in San Ignacio are January, February and March. On average, 85 mm (3.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in San Ignacio. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)116 (4.6)65 (2.5)74 (2.9)253 (10.0)706 (27.8)651 (25.6)682 (26.9)762 (30.0)853 (33.6)873 (34.4)503 (19.8)253 (10.0)
Average precipitation days (≥ 1 mm)191817293130313130303028

Monthly sunshine hours in San Ignacio, Costa Rica

The sunniest months in San Ignacio are February, March and December, when the sun shines an average of 10 hours 10 minutes a day. Least sunny months in San Ignacio: August, September and October receive an average of 6 hours 19 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in San Ignacio. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours253298329294220214203194201186227297
Mean daily daylight hours11h 36m11h 48m12h 3m12h 20m12h 33m12h 40m12h 36m12h 24m12h 9m11h 53m11h 39m11h 32m

Solar UV radiation in San Ignacio, Costa Rica

San Ignacio experiences the highest level of ultraviolet (UV) radiation in March, April and May, when the maximum UV index can reach values of 14 - 15, which corresponds to the Extreme category of sun exposure. January, November and December are in the Very High / Extreme exposure category. In these months, the maximum values of the UV index do not exceed 11. For more detailed information, check out our hourly San Ignacio UV Index data.

Average daily maximum UV levels by month for San Ignacio. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)111314141514141313131110