October is close to Ariyalur's year-round average, with average highs near 34.8°C and lows around 22.5°C (mean 28.7°C). It is a relatively wet time of year, averaging 176 mm of rainfall and 79% relative humidity across the period.
October is close to Ariyalur's year-round average. Across 45 years of records, the warmest October in Ariyalur was 2016 — when the month averaged 31°C — while the coldest was 2000 at 25.4°C. Typical October days reach 34.8°C with nights near 22.5°C. The long-term trend is warming, about 0.3°C per decade.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 28.0°C | 28.4°C | 28.7°C | 29.1°C | 29.0°C | +1°C |
| Avg High | 34.0°C | 34.2°C | 35.3°C | 35.2°C | 35.2°C | +1.2°C |
| Avg Low | 22.0°C | 22.6°C | 22.1°C | 23.0°C | 22.7°C | +0.7°C |
| Avg Rain | 136 mm | 163 mm | 205 mm | 193 mm | 181 mm | +45 mm |
October temperatures in Ariyalur have risen by about 1.6°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.
Daytime highs and overnight lows have shifted differently — highs rose about 0.4°C per decade while lows rose 0.2°C per decade, widening the gap between day and night.
A good time to visit Ariyalur
October is a good time to visit Ariyalur, with days averaging 34.8°C and nights around 22.5°C (mean 28.7°C, close to Ariyalur's yearly average) and higher rainfall. January and December are marginally more temperate, but October still suits most travellers.
| Year | High | Low | Avg | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|
| 2025 | 35.8°C | 23.3°C | 29.5°C | 252 mm | 83% | 1.9 m/s | 4.3 |
| 2024 | 36.1°C | 22.5°C | 29.3°C | 222 mm | 81% | 1.7 m/s | 4.6 |
| 2023 | 37.3°C | 23.8°C | 30.5°C | 90 mm | 73% | 2.2 m/s | 4.8 |
| 2022 | 34.4°C | 21.6°C | 28.0°C | 156 mm | 81% | 1.8 m/s | 4.4 |
| 2021 | 32.5°C | 22.9°C | 27.7°C | 279 mm | 86% | 2 m/s | 4.5 |
| 2020 | 35.1°C | 22.3°C | 28.7°C | 88 mm | 79% | 2.2 m/s | 4.9 |
| 2019 | 31.8°C | 22.8°C | 27.3°C | 235 mm | 86% | 1.8 m/s | 4.6 |
| 2018 | 34.8°C | 21.7°C | 28.2°C | 163 mm | 81% | 2.3 m/s | 4.5 |
| 2017 | 34.8°C | 23.4°C | 29.1°C | 167 mm | 78% | 2.2 m/s | 4.4 |
| 2016 🔥 | 38.2°C | 23.9°C | 31.0°C | 65 mm | 67% | 1.8 m/s | 5.2 |
| 2015 | 34.9°C | 22.8°C | 28.9°C | 170 mm | 78% | 2.1 m/s | 5.2 |
| 2014 | 35.9°C | 23.2°C | 29.6°C | 253 mm | 78% | 2 m/s | 4.6 |
| 2013 | 35.9°C | 23.2°C | 29.5°C | 109 mm | 76% | 2 m/s | 5.2 |
| 2012 🌧️ | 36.8°C | 22.7°C | 29.7°C | 397 mm | 81% | 2.4 m/s | 4.4 |
| 2011 | 33.2°C | 23.8°C | 28.5°C | 238 mm | 80% | 1.7 m/s | 4.6 |
| 2010 | 35.2°C | 22.5°C | 28.8°C | 134 mm | 79% | 2.1 m/s | 4.9 |
| 2009 | 38.3°C | 23.6°C | 30.9°C | 66 mm | 64% | 2.7 m/s | 5.2 |
| 2008 | 36.9°C | 20.0°C | 28.5°C | 203 mm | 77% | 2.1 m/s | 4.9 |
| 2007 | 36.6°C | 22.8°C | 29.7°C | 265 mm | 76% | 2 m/s | 4.6 |
| 2006 | 36.3°C | 23.0°C | 29.6°C | 254 mm | 79% | 2.4 m/s | 4.6 |
| 2005 | 34.2°C | 22.9°C | 28.5°C | 287 mm | 82% | 1.9 m/s | 4.7 |
| 2004 | 32.1°C | 21.6°C | 26.8°C | 268 mm | 86% | 2.3 m/s | 4.6 |
| 2003 | 35.4°C | 23.2°C | 29.3°C | 189 mm | 82% | 2.2 m/s | 4.8 |
| 2002 | 36.0°C | 22.4°C | 29.2°C | 194 mm | 78% | 2.2 m/s | 4.5 |
| 2001 | 34.3°C | 23.1°C | 28.7°C | 155 mm | 81% | 2.2 m/s | 4.5 |
| 2000 ❄️ | 33.0°C | 17.9°C | 25.4°C | 173 mm | 81% | 1.9 m/s | 4.9 |
| 1999 | 33.5°C | 22.4°C | 27.9°C | 224 mm | 83% | 1.7 m/s | 4.7 |
| 1998 | 33.2°C | 23.0°C | 28.1°C | 97 mm | 82% | 2.2 m/s | 4.7 |
| 1997 | 35.7°C | 23.5°C | 29.6°C | 170 mm | 78% | 1.9 m/s | 4.4 |
| 1996 | 33.6°C | 21.5°C | 27.6°C | 97 mm | 80% | 2 m/s | 4.4 |
| 1995 | 34.7°C | 23.1°C | 28.9°C | 112 mm | 78% | 2.2 m/s | 4.4 |
| 1994 | 33.3°C | 23.1°C | 28.2°C | 196 mm | 82% | 2.1 m/s | 4.7 |
| 1993 | 34.9°C | 22.3°C | 28.6°C | 215 mm | 82% | 2.1 m/s | 4.1 |
| 1992 | 32.5°C | 21.3°C | 26.9°C | 89 mm | 83% | 1.8 m/s | 4.7 |
| 1991 | 34.3°C | 22.5°C | 28.4°C | 217 mm | 81% | 2.6 m/s | 4.5 |
| 1990 | 36.4°C | 23.0°C | 29.7°C | 215 mm | 78% | 2.5 m/s | 4.1 |
| 1989 | 35.1°C | 23.5°C | 29.3°C | 101 mm | 75% | 1.7 m/s | 4.8 |
| 1988 | 35.3°C | 22.2°C | 28.8°C | 51 mm | 72% | 1.9 m/s | 5.3 |
| 1987 | 34.7°C | 23.9°C | 29.3°C | 120 mm | 79% | 2.2 m/s | 4.6 |
| 1986 | 33.7°C | 21.7°C | 27.7°C | 119 mm | 79% | 2 m/s | 4.7 |
| 1985 | 34.7°C | 20.7°C | 27.7°C | 92 mm | 76% | 2.5 m/s | 5 |
| 1984 | 32.3°C | 18.7°C | 25.5°C | 150 mm | 81% | 2.1 m/s | 5 |
| 1983 | 33.6°C | 21.6°C | 27.6°C | 116 mm | 78% | 2.1 m/s | — |
| 1982 | 34.5°C | 22.7°C | 28.6°C | 136 mm | 73% | 2 m/s | — |
| 1981 | 32.3°C | 22.8°C | 27.5°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 34.8°C with lows near 22.5°C (mean 28.7°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 1.6°C. Daytime highs moved from 33.5°C to 35.2°C and overnight lows from 21.3°C to 22.8°C over the same span.
October is close to Ariyalur's year-round average and a relatively wet time of year, so plan for around 34.8°C daytime highs and 22.5°C at night.
Not quite — October is the 5th coolest month in Ariyalur, averaging 28.7°C.
For October in Ariyalur, pack light, breathable clothing and sun protection, with typical highs of 34.8°C and lows of 22.5°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.
