October is close to Idukki's year-round average, with average highs near 28.3°C and lows around 18°C (mean 23.2°C). It is a relatively wet time of year, averaging 286 mm of rainfall and 90% relative humidity across the period.
October is close to Idukki's year-round average. Across 45 years of records, the warmest October in Idukki was 1990 — when the month averaged 24.4°C — while the coldest was 1984 at 20.6°C. Typical October days reach 28.3°C with nights near 18°C. The long-term trend is warming, about 0.2°C per decade.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 22.6°C | 23.0°C | 23.3°C | 23.4°C | 23.4°C | +0.8°C |
| Avg High | 28.0°C | 28.0°C | 28.4°C | 28.5°C | 28.5°C | +0.5°C |
| Avg Low | 17.3°C | 18.0°C | 18.2°C | 18.2°C | 18.5°C | +1.2°C |
| Avg Rain | 171 mm | 327 mm | 352 mm | 260 mm | 319 mm | +148 mm |
October temperatures in Idukki have risen by about 1.3°C between 1981–1985 and 2021–2025.
October has ranged from a record low of 13.7°C (1984) to a record high of 30.5°C (1990).
Rainfall in October is a relatively wet time of year, averaging 286 mm, with a wettest year of 517 mm.
A quieter season to visit Idukki
If your dates are flexible, the more temperate months of January and February tend to be the most comfortable for visiting Idukki. That said, October — with days averaging 28.3°C and nights around 18°C (mean 23.2°C) and higher rainfall (286 mm) — can still be rewarding for travellers who don't mind the cooler conditions, and often means fewer crowds.
| Year | High | Low | Avg | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|
| 2025 | 28.7°C | 19.6°C | 24.1°C | 284 mm | 91% | 0.4 m/s | 4.5 |
| 2024 | 29.3°C | 17.3°C | 23.3°C | 277 mm | 90% | 0.3 m/s | 4.6 |
| 2023 | 28.6°C | 19.5°C | 24.0°C | 307 mm | 89% | 0.3 m/s | 4.7 |
| 2022 | 28.2°C | 16.5°C | 22.3°C | 217 mm | 89% | 0.3 m/s | 4.7 |
| 2021 | 28.0°C | 19.4°C | 23.7°C | 438 mm | 92% | 0.4 m/s | 4.2 |
| 2020 | 28.0°C | 18.5°C | 23.2°C | 393 mm | 90% | 0.4 m/s | 5 |
| 2019 | 28.3°C | 17.8°C | 23.1°C | 494 mm | 90% | 0.3 m/s | 4.5 |
| 2018 | 29.1°C | 17.6°C | 23.4°C | 275 mm | 88% | 0.3 m/s | 4.7 |
| 2017 | 28.1°C | 19.2°C | 23.6°C | 189 mm | 91% | 0.3 m/s | 4.9 |
| 2016 | 28.3°C | 17.8°C | 23.1°C | 137 mm | 87% | 0.4 m/s | 5.4 |
| 2015 | 29.0°C | 17.9°C | 23.5°C | 220 mm | 88% | 0.3 m/s | 5 |
| 2014 | 28.6°C | 16.3°C | 22.5°C | 283 mm | 90% | 0.3 m/s | 4.6 |
| 2013 | 28.4°C | 17.9°C | 23.2°C | 195 mm | 90% | 0.4 m/s | 5.3 |
| 2012 | 28.9°C | 19.1°C | 24.0°C | 206 mm | 88% | 0.3 m/s | 4.9 |
| 2011 | 27.9°C | 18.6°C | 23.3°C | 182 mm | 89% | 0.3 m/s | 5.1 |
| 2010 | 28.6°C | 19.4°C | 24.0°C | 419 mm | 92% | 0.5 m/s | 5 |
| 2009 | 29.0°C | 18.2°C | 23.6°C | 107 mm | 87% | 0.4 m/s | 5.4 |
| 2008 | 29.2°C | 17.7°C | 23.4°C | 289 mm | 88% | 0.3 m/s | 4.7 |
| 2007 | 28.3°C | 17.9°C | 23.1°C | 329 mm | 91% | 0.4 m/s | 4.7 |
| 2006 | 27.4°C | 19.0°C | 23.2°C | 481 mm | 91% | 0.3 m/s | 4.7 |
| 2005 | 29.2°C | 19.0°C | 24.1°C | 432 mm | 91% | 0.4 m/s | 5.1 |
| 2004 | 27.7°C | 16.9°C | 22.3°C | 510 mm | 90% | 0.3 m/s | 4.8 |
| 2003 | 27.9°C | 19.1°C | 23.5°C | 459 mm | 91% | 0.4 m/s | 4.9 |
| 2002 | 29.3°C | 19.1°C | 24.2°C | 412 mm | 91% | 0.4 m/s | 4.6 |
| 2001 | 27.9°C | 18.9°C | 23.4°C | 340 mm | 91% | 0.4 m/s | 4.8 |
| 2000 | 28.1°C | 16.2°C | 22.1°C | 164 mm | 89% | 0.4 m/s | 5.3 |
| 1999 🌧️ | 26.8°C | 18.5°C | 22.7°C | 517 mm | 93% | 0.4 m/s | 4.5 |
| 1998 | 27.9°C | 17.4°C | 22.6°C | 360 mm | 92% | 0.4 m/s | 4.8 |
| 1997 | 28.3°C | 18.9°C | 23.6°C | 219 mm | 89% | 0.3 m/s | 4.6 |
| 1996 | 27.3°C | 16.7°C | 22.0°C | 248 mm | 90% | 0.4 m/s | 4.4 |
| 1995 | 27.7°C | 17.2°C | 22.5°C | 187 mm | 90% | 0.4 m/s | 4.6 |
| 1994 | 28.1°C | 18.6°C | 23.3°C | 480 mm | 91% | 0.4 m/s | 4.7 |
| 1993 | 27.8°C | 17.9°C | 22.8°C | 497 mm | 91% | 0.4 m/s | 4 |
| 1992 | 28.0°C | 17.6°C | 22.8°C | 247 mm | 90% | 0.4 m/s | 4.5 |
| 1991 | 27.2°C | 18.7°C | 22.9°C | 249 mm | 90% | 0.4 m/s | 4.5 |
| 1990 🔥 | 30.5°C | 18.3°C | 24.4°C | 268 mm | 86% | 0.3 m/s | 4.7 |
| 1989 | 27.2°C | 18.3°C | 22.8°C | 304 mm | 91% | 0.4 m/s | 4.8 |
| 1988 | 28.2°C | 17.6°C | 22.9°C | 30 mm | 88% | 0.4 m/s | 5 |
| 1987 | 28.1°C | 19.0°C | 23.5°C | 256 mm | 91% | 0.3 m/s | 4.5 |
| 1986 | 28.8°C | 18.3°C | 23.5°C | 102 mm | 87% | 0.4 m/s | 4.8 |
| 1985 | 28.1°C | 17.0°C | 22.5°C | 136 mm | 88% | 0.4 m/s | 5.1 |
| 1984 ❄️ | 27.4°C | 13.7°C | 20.6°C | 299 mm | 88% | 0.4 m/s | 4.7 |
| 1983 | 27.8°C | 18.1°C | 23.0°C | 82 mm | 88% | 0.4 m/s | — |
| 1982 | 28.5°C | 16.2°C | 22.4°C | 84 mm | 86% | 0.3 m/s | — |
| 1981 | 27.6°C | 17.7°C | 22.6°C | 248 mm | 90% | 0.3 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 28.3°C with lows near 18°C (mean 23.2°C), based on 45 years of NASA POWER data.
October averages 286 mm of rainfall in Idukki, a relatively wet time of year. The wettest on record was 517 mm in 1999.
The hottest October reached 30.5°C in 1990. The coldest dipped to 13.7°C in 1984.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 1.3°C. Daytime highs moved from 27.9°C to 28.6°C and overnight lows from 16.5°C to 18.5°C over the same span.
October is close to Idukki's year-round average and a relatively wet time of year, so plan for around 28.3°C daytime highs and 18°C at night.
Not quite — October is the 7th coolest month in Idukki, averaging 23.2°C.
For October in Idukki, pack light layers you can adjust through the day, with typical highs of 28.3°C and lows of 18°C. Bring an umbrella or light rain jacket too.
Relative humidity in October averages 90% — quite humid.
Average wind speed in October is 0.4 m/s. The windiest October on record averaged 0.5 m/s (2010).
The wettest October on record was 1999 with 517 mm. On average, October sees 286 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 October, 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 October specifically, along with year-by-year records and how the month has changed over the decades.
