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Monthly climate in Idukki, India

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Idukki features a tropical savanna climate (Aw). Temperatures typically range between 23 °C (73 °F) and 26 °C (78 °F) through the year, but rarely can drop to 15 °C (60 °F) or can rise to as high as 36 °C (97 °F). The average annual precipitation amounts to about 3153 mm (124.1 inches) and receives 257 rainy days on the 1 mm (0.04 inches) threshold annually. Idukki enjoys an average of 3509 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 Idukki, India

The warmest months in Idukki are February, March and April, with daily mean temperatures ranging from 24 to 26 °C (76 - 78 °F) throughout the day. The coldest temperatures usually occur in July, August and September, when daily mean temperatures range from 23 to 23 °C (73 - 74 °F) throughout the day. On average each year, Idukki experiences 291 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 Idukki. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum33°C
(91°F)		34°C
(94°F)		36°C
(96°F)		36°C
(97°F)		33°C
(92°F)		29°C
(84°F)		29°C
(85°F)		28°C
(83°F)		29°C
(85°F)		30°C
(87°F)		30°C
(87°F)		30°C
(86°F)
Mean maximum31°C
(87°F)		33°C
(91°F)		34°C
(93°F)		34°C
(93°F)		31°C
(88°F)		28°C
(82°F)		28°C
(83°F)		28°C
(82°F)		29°C
(84°F)		29°C
(85°F)		30°C
(85°F)		29°C
(85°F)
Average high29°C
(84°F)		30°C
(87°F)		31°C
(89°F)		31°C
(87°F)		28°C
(82°F)		26°C
(79°F)		26°C
(78°F)		25°C
(78°F)		26°C
(80°F)		27°C
(81°F)		27°C
(82°F)		28°C
(82°F)
Daily mean23°C
(74°F)		24°C
(76°F)		26°C
(78°F)		25°C
(78°F)		24°C
(76°F)		23°C
(74°F)		23°C
(73°F)		23°C
(73°F)		23°C
(74°F)		23°C
(74°F)		24°C
(75°F)		23°C
(74°F)
Average low19°C
(67°F)		20°C
(68°F)		21°C
(70°F)		22°C
(72°F)		22°C
(71°F)		21°C
(71°F)		21°C
(70°F)		21°C
(70°F)		21°C
(70°F)		21°C
(70°F)		21°C
(70°F)		20°C
(69°F)
Mean minimum17°C
(63°F)		17°C
(63°F)		19°C
(67°F)		20°C
(69°F)		20°C
(69°F)		20°C
(69°F)		20°C
(68°F)		20°C
(68°F)		19°C
(67°F)		19°C
(67°F)		19°C
(66°F)		18°C
(64°F)
Minimum15°C
(60°F)		16°C
(61°F)		19°C
(66°F)		19°C
(67°F)		19°C
(67°F)		19°C
(67°F)		19°C
(67°F)		19°C
(67°F)		18°C
(65°F)		18°C
(65°F)		18°C
(64°F)		17°C
(62°F)

Compare climate in Idukki with other places

Compare temperature, precipitation, sunshine, UV index in Idukki, India with other places around the world.

Monthly average precipitation in Idukki, India

Idukki usually has the most precipitation in June, August and October, with an average of 28 rainy days and 445 mm (17.5 inches) of precipitation per month. The driest months in Idukki are January, February and March. On average, 65 mm (2.5 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Idukki. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)63 (2.5)26 (1.0)105 (4.1)175 (6.9)341 (13.4)430 (16.9)390 (15.3)502 (19.8)353 (13.9)404 (15.9)249 (9.8)117 (4.6)
Average precipitation days (≥ 1 mm)6513262929292927272314

Monthly sunshine hours in Idukki, India

The sunniest months in Idukki are February, March and April, when the sun shines an average of 10 hours 45 minutes a day. Least sunny months in Idukki: January, August and November 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 Idukki. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours263309336322298290287266288275268303
Mean daily daylight hours11h 36m11h 48m12h 3m12h 19m12h 33m12h 40m12h 37m12h 25m12h 9m11h 53m11h 39m11h 32m

Solar UV radiation in Idukki, India

Idukki experiences the highest level of ultraviolet (UV) radiation in April, August and September, 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 / 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 Idukki UV Index data.

Average daily maximum UV levels by month for Idukki. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)111313141412131414121010