October is one of the cooler months of the year in Ariyalur, with average highs near 31.5°C and lows around 24.2°C (mean 27.9°C). It is a relatively wet time of year, averaging 176 mm of rainfall and 79% relative humidity across the period.
October is one of the cooler months of the year in Ariyalur. Across 45 years of records, the warmest October in Ariyalur was 2009 — when the month averaged 30.1°C — while the coldest were 1981 and 1984 at 26.5°C. Typical October days reach 31.5°C with nights near 24.2°C. The long-term trend is warming, about 0.2°C per decade.
October is a relatively wet time of year in Ariyalur, averaging 176 mm of rainfall. The wettest October on record was 2012 with 397 mm, while the driest was 1988 at 51 mm.
Relative humidity in Ariyalur during October averages 79%. The most humid October was 2019 at 86%, and the least humid was 2009 at 64%.
October receives about 4.7 kWh/m²/day of solar energy in Ariyalur. The sunniest October was 1988 at 5.3 kWh/m²/day, and the cloudiest were 1990 and 1993 at 4.1.
Average wind speed in Ariyalur during October is 2.1 m/s. The windiest October was 2009 at 2.7 m/s, while the calmest were 1999, 2011 and 2024, among others at 1.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 27.7°C | 27.5°C | 27.9°C | 28.1°C | 28.1°C | +0.4°C |
| Avg High | 31.5°C | 31.0°C | 31.5°C | 31.7°C | 31.7°C | +0.2°C |
| Avg Low | 23.8°C | 24.1°C | 24.3°C | 24.6°C | 24.6°C | +0.8°C |
| Avg Rain | 136 mm | 163 mm | 205 mm | 193 mm | 181 mm | +45 mm |
October temperatures in Ariyalur have risen by about 0.9°C between 1981–1985 and 2021–2025.
October has ranged from a record low of 17.9°C (2000) to a record high of 38.3°C (2009).
Rainfall in October is a relatively wet time of year, averaging 176 mm, with a wettest year of 397 mm.
A quieter season to visit Ariyalur
If your dates are flexible, the more temperate months of January and February tend to be the most comfortable for visiting Ariyalur. That said, October — with days averaging 31.5°C and nights around 24.2°C (mean 27.9°C) and higher rainfall (176 mm) — can still be rewarding for travellers who don't mind the cooler conditions, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 31.1°C | 28.0°C | 24.9°C | 35.8°C | 23.3°C | 252 mm | 83% | 1.9 m/s | 4.3 |
| 2024 | 31.6°C | 28.2°C | 24.8°C | 36.1°C | 22.5°C | 222 mm | 81% | 1.7 m/s | 4.6 |
| 2023 | 34.1°C | 29.6°C | 25.1°C | 37.3°C | 23.8°C | 90 mm | 73% | 2.2 m/s | 4.8 |
| 2022 | 31.2°C | 27.7°C | 24.2°C | 34.4°C | 21.6°C | 156 mm | 81% | 1.8 m/s | 4.4 |
| 2021 | 30.2°C | 27.4°C | 24.6°C | 32.5°C | 22.9°C | 279 mm | 86% | 2 m/s | 4.5 |
| 2020 | 31.9°C | 27.9°C | 24.0°C | 35.1°C | 22.3°C | 88 mm | 79% | 2.2 m/s | 4.9 |
| 2019 | 29.7°C | 27.0°C | 24.4°C | 31.8°C | 22.8°C | 235 mm | 86% | 1.8 m/s | 4.6 |
| 2018 | 31.3°C | 27.7°C | 24.2°C | 34.8°C | 21.7°C | 163 mm | 81% | 2.3 m/s | 4.5 |
| 2017 | 32.1°C | 28.4°C | 24.7°C | 34.8°C | 23.4°C | 167 mm | 78% | 2.2 m/s | 4.4 |
| 2016 | 34.4°C | 29.7°C | 25.1°C | 38.2°C | 23.9°C | 65 mm | 67% | 1.8 m/s | 5.2 |
| 2015 | 32.2°C | 28.3°C | 24.4°C | 34.9°C | 22.8°C | 170 mm | 78% | 2.1 m/s | 5.2 |
| 2014 | 31.6°C | 28.2°C | 24.7°C | 35.9°C | 23.2°C | 253 mm | 78% | 2 m/s | 4.6 |
| 2013 | 32.1°C | 28.4°C | 24.6°C | 35.9°C | 23.2°C | 109 mm | 76% | 2 m/s | 5.2 |
| 2012 🌧️ | 30.7°C | 27.6°C | 24.4°C | 36.8°C | 22.7°C | 397 mm | 81% | 2.4 m/s | 4.4 |
| 2011 | 30.9°C | 27.8°C | 24.7°C | 33.2°C | 23.8°C | 238 mm | 80% | 1.7 m/s | 4.6 |
| 2010 | 31.9°C | 28.1°C | 24.4°C | 35.2°C | 22.5°C | 134 mm | 79% | 2.1 m/s | 4.9 |
| 2009 🔥 | 35.1°C | 30.1°C | 25.0°C | 38.3°C | 23.6°C | 66 mm | 64% | 2.7 m/s | 5.2 |
| 2008 | 31.9°C | 28.1°C | 24.3°C | 36.9°C | 20.0°C | 203 mm | 77% | 2.1 m/s | 4.9 |
| 2007 | 31.4°C | 28.0°C | 24.5°C | 36.6°C | 22.8°C | 265 mm | 76% | 2 m/s | 4.6 |
| 2006 | 31.9°C | 28.2°C | 24.5°C | 36.3°C | 23.0°C | 254 mm | 79% | 2.4 m/s | 4.6 |
| 2005 | 31.0°C | 27.8°C | 24.5°C | 34.2°C | 22.9°C | 287 mm | 82% | 1.9 m/s | 4.7 |
| 2004 | 29.7°C | 26.8°C | 23.9°C | 32.1°C | 21.6°C | 268 mm | 86% | 2.3 m/s | 4.6 |
| 2003 | 30.8°C | 27.6°C | 24.5°C | 35.4°C | 23.2°C | 189 mm | 82% | 2.2 m/s | 4.8 |
| 2002 | 31.7°C | 28.1°C | 24.5°C | 36.0°C | 22.4°C | 194 mm | 78% | 2.2 m/s | 4.5 |
| 2001 | 30.9°C | 27.5°C | 24.2°C | 34.3°C | 23.1°C | 155 mm | 81% | 2.2 m/s | 4.5 |
| 2000 | 30.5°C | 26.7°C | 22.9°C | 33.0°C | 17.9°C | 173 mm | 81% | 1.9 m/s | 4.9 |
| 1999 | 30.3°C | 27.3°C | 24.3°C | 33.5°C | 22.4°C | 224 mm | 83% | 1.7 m/s | 4.7 |
| 1998 | 31.0°C | 27.5°C | 24.0°C | 33.2°C | 23.0°C | 97 mm | 82% | 2.2 m/s | 4.7 |
| 1997 | 31.8°C | 28.3°C | 24.7°C | 35.7°C | 23.5°C | 170 mm | 78% | 1.9 m/s | 4.4 |
| 1996 | 30.9°C | 27.2°C | 23.5°C | 33.6°C | 21.5°C | 97 mm | 80% | 2 m/s | 4.4 |
| 1995 | 31.8°C | 28.0°C | 24.3°C | 34.7°C | 23.1°C | 112 mm | 78% | 2.2 m/s | 4.4 |
| 1994 | 30.7°C | 27.4°C | 24.1°C | 33.3°C | 23.1°C | 196 mm | 82% | 2.1 m/s | 4.7 |
| 1993 | 30.5°C | 27.3°C | 24.1°C | 34.9°C | 22.3°C | 215 mm | 82% | 2.1 m/s | 4.1 |
| 1992 | 30.1°C | 26.8°C | 23.4°C | 32.5°C | 21.3°C | 89 mm | 83% | 1.8 m/s | 4.7 |
| 1991 | 31.0°C | 27.4°C | 23.9°C | 34.3°C | 22.5°C | 217 mm | 81% | 2.6 m/s | 4.5 |
| 1990 | 32.0°C | 28.1°C | 24.2°C | 36.4°C | 23.0°C | 215 mm | 78% | 2.5 m/s | 4.1 |
| 1989 | 32.3°C | 28.4°C | 24.5°C | 35.1°C | 23.5°C | 101 mm | 75% | 1.7 m/s | 4.8 |
| 1988 | 33.3°C | 28.6°C | 23.9°C | 35.3°C | 22.2°C | 51 mm | 72% | 1.9 m/s | 5.3 |
| 1987 | 31.7°C | 28.3°C | 24.9°C | 34.7°C | 23.9°C | 120 mm | 79% | 2.2 m/s | 4.6 |
| 1986 | 31.4°C | 27.5°C | 23.6°C | 33.7°C | 21.7°C | 119 mm | 79% | 2 m/s | 4.7 |
| 1985 | 31.7°C | 27.5°C | 23.3°C | 34.7°C | 20.7°C | 92 mm | 76% | 2.5 m/s | 5 |
| 1984 | 30.4°C | 26.5°C | 22.6°C | 32.3°C | 18.7°C | 150 mm | 81% | 2.1 m/s | 5 |
| 1983 | 31.5°C | 27.7°C | 23.9°C | 33.6°C | 21.6°C | 116 mm | 78% | 2.1 m/s | — |
| 1982 | 32.2°C | 28.1°C | 24.1°C | 34.5°C | 22.7°C | 136 mm | 73% | 2 m/s | — |
| 1981 ❄️ | 29.4°C | 26.5°C | 23.6°C | 32.3°C | 22.8°C | 340 mm | 86% | 1.8 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 31.5°C with lows near 24.2°C (mean 27.9°C), based on 45 years of NASA POWER data.
October averages 176 mm of rainfall in Ariyalur, a relatively wet time of year. The wettest on record was 397 mm in 2012.
The hottest October reached 38.3°C in 2009. The coldest dipped to 17.9°C in 2000.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 0.9°C. Daytime highs moved from 31°C to 31.6°C and overnight lows from 23.5°C to 24.7°C over the same span.
October is one of the cooler months of the year in Ariyalur and a relatively wet time of year, so plan for around 31.5°C daytime highs and 24.2°C at night.
Not quite — October is the 5th coolest month in Ariyalur, averaging 27.9°C.
For October in Ariyalur, pack light, breathable clothing and sun protection, with typical highs of 31.5°C and lows of 24.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in October averages 79% — quite humid.
Average wind speed in October is 2.1 m/s. The windiest October on record averaged 2.7 m/s (2009).
The wettest October on record was 2012 with 397 mm. On average, October sees 176 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 Ariyalur 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.
