April is one of the warmer months of the year in Theni, with average highs near 37.6°C and lows around 19.8°C (mean 28.7°C). It is one of the drier months, averaging 66 mm of rainfall and 61% relative humidity across the period.
April is one of the warmer months of the year in Theni. Across 45 years of records, the warmest April in Theni was 1998 — when the month averaged 30.6°C — while the coldest was 1984 at 26.2°C. Typical April days reach 37.6°C with nights near 19.8°C. The long-term April temperature trend is broadly flat.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 28.5°C | 28.9°C | 28.5°C | 28.9°C | 28.4°C | -0.1°C |
| Avg High | 37.6°C | 38.2°C | 37.3°C | 37.6°C | 36.9°C | -0.7°C |
| Avg Low | 19.5°C | 19.7°C | 19.7°C | 20.3°C | 20.0°C | +0.5°C |
| Avg Rain | 75 mm | 53 mm | 74 mm | 54 mm | 83 mm | +9 mm |
April temperatures in Theni have stayed relatively stable across the record.
April has ranged from a record low of 17.8°C (1994) to a record high of 40.2°C (1998).
Rainfall in April is one of the drier months, averaging 66 mm, with a wettest year of 183 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.2°C per decade while lows rose 0.2°C per decade, narrowing the gap between day and night.
A quieter season to visit Theni
If your dates are flexible, the more temperate months of January and February tend to be the most comfortable for visiting Theni. That said, April — with days averaging 37.6°C and nights around 19.8°C (mean 28.7°C) and moderate rainfall (66 mm) — can still be rewarding for travellers who don't mind the warmth, and often means fewer crowds.
| Year | High | Low | Avg | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|
| 2025 | 34.7°C | 20.5°C | 27.6°C | 113 mm | 71% | 0.9 m/s | 5.6 |
| 2024 | 39.9°C | 20.2°C | 30.0°C | 20 mm | 53% | 1.3 m/s | 6.3 |
| 2023 | 36.8°C | 19.8°C | 28.3°C | 114 mm | 64% | 1.2 m/s | 6.1 |
| 2022 | 35.4°C | 20.0°C | 27.7°C | 146 mm | 72% | 1 m/s | 5.6 |
| 2021 | 36.5°C | 19.5°C | 28.0°C | 66 mm | 67% | 1 m/s | 5.7 |
| 2020 | 38.0°C | 19.9°C | 29.0°C | 41 mm | 59% | 1.2 m/s | 6.2 |
| 2019 | 38.4°C | 21.2°C | 29.8°C | 67 mm | 55% | 1.3 m/s | 6.3 |
| 2018 | 36.9°C | 21.0°C | 28.9°C | 49 mm | 63% | 1.1 m/s | 6.1 |
| 2017 | 39.1°C | 20.4°C | 29.7°C | 16 mm | 52% | 1.2 m/s | 6.3 |
| 2016 | 38.7°C | 21.1°C | 29.9°C | 36 mm | 57% | 1.1 m/s | 6.4 |
| 2015 | 35.6°C | 18.9°C | 27.2°C | 131 mm | 69% | 1 m/s | 5.9 |
| 2014 | 37.9°C | 20.2°C | 29.0°C | 32 mm | 52% | 1.1 m/s | 6.2 |
| 2013 | 38.4°C | 20.7°C | 29.5°C | 20 mm | 54% | 1 m/s | 6.2 |
| 2012 | 36.8°C | 19.3°C | 28.0°C | 84 mm | 62% | 1.1 m/s | 5.9 |
| 2011 | 36.4°C | 19.2°C | 27.8°C | 63 mm | 63% | 1.1 m/s | 5.9 |
| 2010 | 37.5°C | 20.8°C | 29.2°C | 42 mm | 58% | 1.1 m/s | 6 |
| 2009 | 37.7°C | 19.0°C | 28.4°C | 41 mm | 58% | 1.2 m/s | 6 |
| 2008 | 35.4°C | 18.7°C | 27.1°C | 53 mm | 72% | 1.2 m/s | 6.1 |
| 2007 | 37.5°C | 20.3°C | 28.9°C | 66 mm | 63% | 1.1 m/s | 6.1 |
| 2006 | 37.5°C | 19.4°C | 28.5°C | 39 mm | 61% | 1.1 m/s | 6.2 |
| 2005 | 36.7°C | 19.6°C | 28.2°C | 176 mm | 77% | 1 m/s | 5.5 |
| 2004 | 39.0°C | 20.5°C | 29.8°C | 49 mm | 60% | 1 m/s | 6.1 |
| 2003 | 35.8°C | 19.8°C | 27.8°C | 57 mm | 65% | 1.1 m/s | 6.1 |
| 2002 | 38.2°C | 20.0°C | 29.1°C | 39 mm | 58% | 1.2 m/s | 6.3 |
| 2001 🌧️ | 37.0°C | 20.0°C | 28.5°C | 183 mm | 71% | 1.1 m/s | 5.5 |
| 2000 | 38.3°C | 19.2°C | 28.8°C | 38 mm | 63% | 1.2 m/s | 6.2 |
| 1999 | 38.4°C | 18.7°C | 28.6°C | 68 mm | 61% | 1.5 m/s | 6 |
| 1998 🔥 | 40.2°C | 21.0°C | 30.6°C | 15 mm | 50% | 1.2 m/s | 6 |
| 1997 | 35.8°C | 19.4°C | 27.6°C | 62 mm | 63% | 1 m/s | 5.7 |
| 1996 | 37.5°C | 19.9°C | 28.7°C | 131 mm | 68% | 1 m/s | 5.4 |
| 1995 | 37.6°C | 20.1°C | 28.8°C | 45 mm | 62% | 1.2 m/s | 5.8 |
| 1994 | 36.0°C | 17.8°C | 26.9°C | 125 mm | 71% | 1 m/s | 5.7 |
| 1993 | 38.1°C | 18.8°C | 28.5°C | 36 mm | 52% | 1.3 m/s | 6.4 |
| 1992 | 39.7°C | 19.2°C | 29.4°C | 19 mm | 48% | 1.2 m/s | 6.3 |
| 1991 | 39.2°C | 20.9°C | 30.0°C | 3 mm | 50% | 1.3 m/s | 6.2 |
| 1990 | 39.7°C | 21.0°C | 30.3°C | 24 mm | 49% | 1.2 m/s | 6.1 |
| 1989 | 38.6°C | 19.3°C | 28.9°C | 49 mm | 52% | 1.3 m/s | 6.2 |
| 1988 | 37.6°C | 19.8°C | 28.7°C | 120 mm | 68% | 1 m/s | 5.6 |
| 1987 | 39.3°C | 18.2°C | 28.7°C | 39 mm | 54% | 1.1 m/s | 6 |
| 1986 | 37.6°C | 20.6°C | 29.1°C | 52 mm | 58% | 1.1 m/s | 6.7 |
| 1985 | 37.4°C | 20.0°C | 28.7°C | 55 mm | 60% | 1.1 m/s | 6.2 |
| 1984 ❄️ | 33.8°C | 18.6°C | 26.2°C | 131 mm | 75% | 1 m/s | 5.5 |
| 1983 | 39.7°C | 20.9°C | 30.3°C | 12 mm | 44% | 1.2 m/s | — |
| 1982 | 37.0°C | 19.0°C | 28.0°C | 134 mm | 65% | 1 m/s | — |
| 1981 | 37.3°C | 19.2°C | 28.2°C | 83 mm | 60% | 1.2 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 37.6°C with lows near 19.8°C (mean 28.7°C), based on 45 years of NASA POWER data.
April averages 66 mm of rainfall in Theni, one of the drier months. The wettest on record was 183 mm in 2001.
The hottest April reached 40.2°C in 1998. The coldest dipped to 17.8°C in 1994.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average April temperatures have held steady by about 0°C. Daytime highs moved from 37°C to 36.7°C and overnight lows from 19.5°C to 20°C over the same span.
April is one of the warmer months of the year in Theni and one of the drier months, so plan for around 37.6°C daytime highs and 19.8°C at night.
Not quite — April is the 12th coolest month in Theni, averaging 28.7°C.
For April in Theni, pack light, breathable clothing and sun protection, with typical highs of 37.6°C and lows of 19.8°C. Bring an umbrella or light rain jacket too.
Relative humidity in April averages 61% — moderately humid.
Average wind speed in April is 1.1 m/s. The windiest April on record averaged 1.5 m/s (1999).
The wettest April on record was 2001 with 183 mm. On average, April sees 66 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 April, 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 April specifically, along with year-by-year records and how the month has changed over the decades.
