January is one of the cooler months of the year in Idukki, with average highs near 27.4°C and lows around 16.5°C (mean 22°C). It is one of the drier months, averaging 22 mm of rainfall and 75% relative humidity across the period.
January is one of the cooler months of the year in Idukki. Across 45 years of records, the warmest January in Idukki was 2013 — when the month averaged 23.9°C — while the coldest was 1993 at 20.5°C. Typical January days reach 27.4°C with nights near 16.5°C. The long-term January temperature trend is broadly flat.
January is one of the drier months in Idukki, averaging 22 mm of rainfall. The wettest January on record was 2021 with 145 mm, while the driest were 1988, 1991 and 1993, among others at 0 mm.
Relative humidity in Idukki during January averages 75%. The most humid January was 2021 at 86%, and the least humid was 1983 at 60%.
January receives about 5.2 kWh/m²/day of solar energy in Idukki. The sunniest Januarys were 1999, 2008 and 2012, among others at 5.7 kWh/m²/day, and the cloudiest was 2021 at 4.2.
Average wind speed in Idukki during January is 0.3 m/s. The windiest Januarys were 1990, 2008 and 2019, among others at 0.4 m/s, while the calmest were 2023, 2024 and 2025, among others at 0.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 22.1°C | 21.6°C | 22.0°C | 22.1°C | 22.1°C | 0°C |
| Avg High | 27.7°C | 27.2°C | 27.5°C | 27.8°C | 26.6°C | -1.1°C |
| Avg Low | 16.4°C | 16.0°C | 16.4°C | 16.4°C | 17.5°C | +1.1°C |
| Avg Rain | 30 mm | 19 mm | 18 mm | 8 mm | 41 mm | +10 mm |
January temperatures in Idukki have stayed relatively stable across the record.
January has ranged from a record low of 10.9°C (1999) to a record high of 33.8°C (1983).
Rainfall in January is one of the drier months, averaging 22 mm, with a wettest year of 145 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.1°C per decade while lows rose 0.2°C per decade, narrowing the gap between day and night.
One of the best times to visit Idukki
January is one of the best times to visit Idukki. Expect days averaging 27.4°C and nights around 16.5°C (mean 22°C) — cooler than Idukki's yearly average — with low rainfall (22 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 26.5°C | 21.9°C | 17.2°C | 28.7°C | 14.6°C | 19 mm | 81% | 0.3 m/s | 4.6 |
| 2024 | 26.6°C | 22.3°C | 18.1°C | 28.2°C | 15.3°C | 44 mm | 84% | 0.3 m/s | 4.8 |
| 2023 | 25.9°C | 20.7°C | 15.5°C | 27.6°C | 12.9°C | 15 mm | 79% | 0.3 m/s | 5.3 |
| 2022 | 27.0°C | 22.6°C | 18.3°C | 29.1°C | 17.0°C | 17 mm | 83% | 0.3 m/s | 5.2 |
| 2021 🌧️ | 25.9°C | 22.0°C | 18.1°C | 28.1°C | 14.7°C | 145 mm | 86% | 0.3 m/s | 4.2 |
| 2020 | 27.9°C | 22.9°C | 17.9°C | 30.8°C | 14.2°C | 5 mm | 78% | 0.3 m/s | 5.4 |
| 2019 | 27.6°C | 21.2°C | 14.9°C | 30.4°C | 12.3°C | 0 mm | 71% | 0.4 m/s | 5.5 |
| 2018 | 26.8°C | 21.5°C | 16.3°C | 29.3°C | 13.6°C | 4 mm | 78% | 0.3 m/s | 5.1 |
| 2017 | 29.6°C | 23.1°C | 16.7°C | 31.6°C | 13.9°C | 32 mm | 67% | 0.3 m/s | 5 |
| 2016 | 27.0°C | 21.9°C | 16.8°C | 29.7°C | 13.6°C | 1 mm | 80% | 0.3 m/s | 5.4 |
| 2015 | 27.3°C | 21.8°C | 16.3°C | 29.7°C | 13.0°C | 4 mm | 76% | 0.3 m/s | 5.4 |
| 2014 | 27.8°C | 22.3°C | 16.7°C | 30.5°C | 14.8°C | 4 mm | 74% | 0.3 m/s | 5.3 |
| 2013 🔥 | 30.6°C | 23.9°C | 17.1°C | 31.9°C | 14.0°C | 2 mm | 65% | 0.3 m/s | 5.6 |
| 2012 | 27.3°C | 21.5°C | 15.7°C | 28.7°C | 11.5°C | 2 mm | 75% | 0.3 m/s | 5.7 |
| 2011 | 26.1°C | 21.3°C | 16.6°C | 27.6°C | 12.2°C | 12 mm | 82% | 0.3 m/s | 5 |
| 2010 | 27.7°C | 22.3°C | 16.9°C | 29.7°C | 14.3°C | 16 mm | 76% | 0.3 m/s | 5.4 |
| 2009 | 27.9°C | 21.7°C | 15.4°C | 31.2°C | 12.7°C | 10 mm | 70% | 0.3 m/s | 5.6 |
| 2008 | 27.3°C | 21.6°C | 15.8°C | 30.4°C | 12.5°C | 0 mm | 75% | 0.4 m/s | 5.7 |
| 2007 | 27.0°C | 21.4°C | 15.8°C | 29.8°C | 12.5°C | 4 mm | 74% | 0.3 m/s | 5.2 |
| 2006 | 26.1°C | 21.3°C | 16.4°C | 27.5°C | 12.3°C | 15 mm | 80% | 0.3 m/s | 5.1 |
| 2005 | 27.2°C | 22.0°C | 16.7°C | 30.0°C | 13.0°C | 69 mm | 77% | 0.3 m/s | 5.1 |
| 2004 | 28.3°C | 22.3°C | 16.3°C | 31.1°C | 12.7°C | 23 mm | 73% | 0.3 m/s | 5.6 |
| 2003 | 28.2°C | 22.6°C | 16.9°C | 31.2°C | 14.5°C | 2 mm | 72% | 0.3 m/s | 5.2 |
| 2002 | 27.5°C | 22.3°C | 17.0°C | 30.1°C | 11.6°C | 11 mm | 77% | 0.3 m/s | 5.1 |
| 2001 | 28.7°C | 22.9°C | 17.2°C | 30.7°C | 13.8°C | 28 mm | 71% | 0.3 m/s | 4.8 |
| 2000 | 27.0°C | 21.8°C | 16.7°C | 29.4°C | 13.8°C | 16 mm | 75% | 0.3 m/s | 5.1 |
| 1999 | 26.1°C | 20.9°C | 15.7°C | 28.4°C | 10.9°C | 1 mm | 78% | 0.3 m/s | 5.7 |
| 1998 | 26.8°C | 22.2°C | 17.6°C | 28.6°C | 14.1°C | 0 mm | 82% | 0.3 m/s | 5 |
| 1997 | 26.2°C | 20.9°C | 15.7°C | 27.3°C | 11.9°C | 2 mm | 79% | 0.3 m/s | 5.3 |
| 1996 | 28.1°C | 21.9°C | 15.6°C | 30.2°C | 13.2°C | 7 mm | 68% | 0.3 m/s | 5.4 |
| 1995 | 27.5°C | 22.1°C | 16.7°C | 30.1°C | 13.2°C | 36 mm | 75% | 0.3 m/s | 5 |
| 1994 | 25.7°C | 21.3°C | 16.8°C | 27.4°C | 12.6°C | 135 mm | 83% | 0.3 m/s | 5.3 |
| 1993 ❄️ | 26.4°C | 20.5°C | 14.7°C | 29.7°C | 12.4°C | 0 mm | 72% | 0.3 m/s | 5.2 |
| 1992 | 27.3°C | 21.1°C | 14.9°C | 30.5°C | 12.4°C | 3 mm | 69% | 0.3 m/s | 5.7 |
| 1991 | 29.9°C | 23.4°C | 16.9°C | 32.1°C | 13.2°C | 0 mm | 65% | 0.3 m/s | 5.2 |
| 1990 | 28.2°C | 21.7°C | 15.2°C | 30.6°C | 11.6°C | 9 mm | 64% | 0.4 m/s | 5.4 |
| 1989 | 30.2°C | 23.3°C | 16.4°C | 31.9°C | 13.7°C | 2 mm | 62% | 0.3 m/s | 5 |
| 1988 | 26.1°C | 20.8°C | 15.6°C | 27.8°C | 12.8°C | 0 mm | 79% | 0.3 m/s | 5.6 |
| 1987 | 30.1°C | 23.3°C | 16.5°C | 31.6°C | 13.2°C | 4 mm | 64% | 0.3 m/s | 5.5 |
| 1986 | 28.0°C | 22.7°C | 17.5°C | 30.9°C | 14.6°C | 7 mm | 73% | 0.3 m/s | 5.2 |
| 1985 | 26.0°C | 21.2°C | 16.5°C | 29.3°C | 12.8°C | 124 mm | 80% | 0.3 m/s | 5.1 |
| 1984 | 26.3°C | 22.1°C | 17.8°C | 28.3°C | 15.0°C | 104 mm | 81% | 0.3 m/s | 4.6 |
| 1983 | 30.4°C | 23.0°C | 15.7°C | 33.8°C | 12.2°C | 0 mm | 60% | 0.4 m/s | — |
| 1982 | 26.5°C | 21.0°C | 15.4°C | 29.3°C | 12.1°C | 0 mm | 76% | 0.3 m/s | — |
| 1981 | 26.1°C | 21.1°C | 16.2°C | 27.7°C | 13.0°C | 33 mm | 79% | 0.3 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 27.4°C with lows near 16.5°C (mean 22°C), based on 45 years of NASA POWER data.
January averages 22 mm of rainfall in Idukki, one of the drier months. The wettest on record was 145 mm in 2021.
The hottest January reached 33.8°C in 1983. The coldest dipped to 10.9°C in 1999.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have risen by about 0.2°C — but days and nights have moved in opposite directions. Overnight lows rose from 16.3°C to 17.4°C while daytime highs eased from 27.1°C to 26.4°C, narrowing the gap between day and night.
January is one of the cooler months of the year in Idukki and one of the drier months, so plan for around 27.4°C daytime highs and 16.5°C at night.
Not quite — January is the 2nd coolest month in Idukki, averaging 22°C.
For January in Idukki, pack light layers you can adjust through the day, with typical highs of 27.4°C and lows of 16.5°C.
Relative humidity in January averages 75% — moderately humid.
Average wind speed in January is 0.3 m/s. The windiest January on record averaged 0.4 m/s (1983).
The wettest January on record was 2021 with 145 mm. On average, January sees 22 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Idukki behaves each January, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for January specifically, along with year-by-year records and how the month has changed over the decades.
