August is close to Theni's year-round average, with average highs near 31.1°C and lows around 18.3°C (mean 24.7°C). It is a relatively wet time of year, averaging 120 mm of rainfall and 79% relative humidity across the period.
August is close to Theni's year-round average. Across 45 years of records, the warmest August in Theni was 2015 — when the month averaged 26.6°C — while the coldest were 1981, 1991 and 1997 at 23.1°C. Typical August days reach 31.1°C with nights near 18.3°C. The long-term trend is warming, about 0.4°C per decade.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 24.3°C | 24.0°C | 24.6°C | 25.5°C | 25.3°C | +1°C |
| Avg High | 30.6°C | 29.7°C | 31.0°C | 32.3°C | 32.0°C | +1.4°C |
| Avg Low | 17.9°C | 18.2°C | 18.3°C | 18.7°C | 18.6°C | +0.7°C |
| Avg Rain | 123 mm | 111 mm | 119 mm | 115 mm | 145 mm | +22 mm |
August temperatures in Theni have risen by about 1.1°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 16.7°C (1986) to a record high of 34.2°C (2015).
Rainfall in August is a relatively wet time of year, averaging 120 mm, with a wettest year of 204 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.6°C per decade while lows rose 0.2°C per decade, widening the gap between day and night.
A good time to visit Theni
August is a good time to visit Theni, with days averaging 31.1°C and nights around 18.3°C (mean 24.7°C, close to Theni's yearly average) and higher rainfall. January and February are marginally more temperate, but August still suits most travellers.
| Year | High | Low | Avg | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|
| 2025 | 32.5°C | 18.8°C | 25.7°C | 97 mm | 77% | 2.2 m/s | 4.7 |
| 2024 🌧️ | 32.0°C | 18.9°C | 25.4°C | 204 mm | 83% | 1.6 m/s | 4.8 |
| 2023 | 34.1°C | 18.3°C | 26.2°C | 121 mm | 73% | 1.7 m/s | 6 |
| 2022 | 30.4°C | 18.1°C | 24.3°C | 201 mm | 84% | 2.1 m/s | 4.5 |
| 2021 | 31.1°C | 18.2°C | 24.6°C | 141 mm | 77% | 2.1 m/s | 4.6 |
| 2020 | 32.1°C | 19.0°C | 25.5°C | 106 mm | 79% | 2.3 m/s | 4.9 |
| 2019 | 33.0°C | 19.0°C | 26.0°C | 151 mm | 75% | 2.9 m/s | 4.4 |
| 2018 | 32.0°C | 18.4°C | 25.2°C | 119 mm | 74% | 3.3 m/s | 4.4 |
| 2017 | 32.4°C | 19.0°C | 25.7°C | 175 mm | 80% | 2.1 m/s | 4.7 |
| 2016 | 32.4°C | 18.0°C | 25.2°C | 74 mm | 75% | 2.7 m/s | 5.5 |
| 2015 🔥 | 34.2°C | 19.0°C | 26.6°C | 67 mm | 74% | 2.1 m/s | 5.6 |
| 2014 | 29.8°C | 18.5°C | 24.1°C | 169 mm | 78% | 2.3 m/s | 4.8 |
| 2013 | 32.5°C | 18.8°C | 25.6°C | 145 mm | 76% | 2.4 m/s | 5.1 |
| 2012 | 33.2°C | 18.5°C | 25.8°C | 99 mm | 73% | 2.3 m/s | 5 |
| 2011 | 31.9°C | 18.6°C | 25.3°C | 78 mm | 74% | 2.5 m/s | 4.7 |
| 2010 | 31.5°C | 18.8°C | 25.2°C | 71 mm | 77% | 2.4 m/s | 4.4 |
| 2009 | 31.6°C | 18.7°C | 25.1°C | 69 mm | 76% | 2.3 m/s | 5.2 |
| 2008 | 31.1°C | 18.2°C | 24.6°C | 135 mm | 78% | 1.9 m/s | 5.1 |
| 2007 | 30.5°C | 18.1°C | 24.3°C | 106 mm | 81% | 2.1 m/s | 5.1 |
| 2006 | 31.1°C | 17.0°C | 24.0°C | 169 mm | 81% | 2.5 m/s | 5.4 |
| 2005 | 31.4°C | 18.3°C | 24.9°C | 72 mm | 80% | 2.5 m/s | 5.7 |
| 2004 | 30.2°C | 18.3°C | 24.3°C | 91 mm | 81% | 2.8 m/s | 5.3 |
| 2003 | 30.1°C | 18.9°C | 24.5°C | 131 mm | 81% | 2.3 m/s | 5.2 |
| 2002 | 32.1°C | 18.6°C | 25.4°C | 137 mm | 75% | 3 m/s | 5.1 |
| 2001 | 30.3°C | 18.8°C | 24.5°C | 74 mm | 81% | 2.6 m/s | 5 |
| 2000 | 31.5°C | 17.9°C | 24.7°C | 202 mm | 79% | 2.8 m/s | 4.4 |
| 1999 | 30.3°C | 18.7°C | 24.5°C | 54 mm | 78% | 2.1 m/s | 5.3 |
| 1998 | 31.0°C | 18.6°C | 24.8°C | 178 mm | 82% | 1.8 m/s | 5.2 |
| 1997 | 28.7°C | 17.6°C | 23.1°C | 132 mm | 82% | 2.8 m/s | 4.3 |
| 1996 | 28.7°C | 18.3°C | 23.5°C | 146 mm | 82% | 2.5 m/s | 4.2 |
| 1995 | 31.2°C | 18.3°C | 24.7°C | 100 mm | 79% | 2.3 m/s | 4.4 |
| 1994 | 29.1°C | 18.1°C | 23.6°C | 141 mm | 84% | 2.4 m/s | 4.4 |
| 1993 | 30.4°C | 18.0°C | 24.2°C | 53 mm | 80% | 2.5 m/s | 4.6 |
| 1992 | 28.6°C | 18.6°C | 23.6°C | 99 mm | 81% | 2.8 m/s | 4.5 |
| 1991 | 28.1°C | 18.0°C | 23.1°C | 151 mm | 84% | 2.5 m/s | 4.3 |
| 1990 | 31.0°C | 18.3°C | 24.6°C | 58 mm | 75% | 3.3 m/s | 4.5 |
| 1989 | 30.2°C | 18.2°C | 24.2°C | 63 mm | 78% | 3.1 m/s | 4.7 |
| 1988 | 29.5°C | 18.1°C | 23.8°C | 142 mm | 85% | 2 m/s | 4.1 |
| 1987 | 33.4°C | 17.7°C | 25.6°C | 202 mm | 76% | 2.3 m/s | 4.6 |
| 1986 | 32.1°C | 16.7°C | 24.4°C | 153 mm | 75% | 2.9 m/s | 5.1 |
| 1985 | 29.6°C | 17.9°C | 23.7°C | 77 mm | 79% | 2.6 m/s | 4.6 |
| 1984 | 31.7°C | 18.2°C | 25.0°C | 64 mm | 76% | 3 m/s | 5.4 |
| 1983 | 31.7°C | 18.7°C | 25.2°C | 96 mm | 75% | 2.7 m/s | — |
| 1982 | 29.0°C | 17.9°C | 23.4°C | 132 mm | 85% | 2.5 m/s | — |
| 1981 ❄️ | 28.6°C | 17.7°C | 23.1°C | 177 mm | 84% | 2.6 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 31.1°C with lows near 18.3°C (mean 24.7°C), based on 45 years of NASA POWER data.
August averages 120 mm of rainfall in Theni, a relatively wet time of year. The wettest on record was 204 mm in 2024.
The hottest August reached 34.2°C in 2015. The coldest dipped to 16.7°C in 1986.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 1.1°C. Daytime highs moved from 30.1°C to 32°C and overnight lows from 18.1°C to 18.5°C over the same span.
August is close to Theni's year-round average and a relatively wet time of year, so plan for around 31.1°C daytime highs and 18.3°C at night.
Not quite — August is the 8th coolest month in Theni, averaging 24.7°C.
For August in Theni, pack light, breathable clothing and sun protection, with typical highs of 31.1°C and lows of 18.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 79% — quite humid.
Average wind speed in August is 2.5 m/s. The windiest August on record averaged 3.3 m/s (1990).
The wettest August on record was 2024 with 204 mm. On average, August sees 120 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 Theni behaves each August, 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 August specifically, along with year-by-year records and how the month has changed over the decades.
