May is one of the warmer months of the year in Namakkal, with average highs near 40.9°C and lows around 23.6°C (mean 32.3°C). It is about average for rainfall, averaging 69 mm of rainfall and 60% relative humidity across the period.
May is one of the warmer months of the year in Namakkal. Across 45 years of records, the warmest May in Namakkal was 1991 — when the month averaged 34.1°C — while the coldest was 2015 at 28.7°C. Typical May days reach 40.9°C with nights near 23.6°C. The long-term trend is cooling, 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 | 32.6°C | 32.6°C | 32.4°C | 31.9°C | 31.7°C | -0.9°C |
| Avg High | 41.3°C | 41.5°C | 41.2°C | 40.3°C | 39.9°C | -1.4°C |
| Avg Low | 23.8°C | 23.6°C | 23.5°C | 23.4°C | 23.5°C | -0.3°C |
| Avg Rain | 39 mm | 52 mm | 76 mm | 85 mm | 103 mm | +64 mm |
May temperatures in Namakkal have fallen by about 1.1°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 20.4°C (2015) to a record high of 43.3°C (2024).
Rainfall in May is about average for rainfall, averaging 69 mm, with a wettest year of 207 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.4°C per decade while lows fell 0.1°C per decade, narrowing the gap between day and night.
A quieter season to visit Namakkal
If your dates are flexible, the more temperate months of January and December tend to be the most comfortable for visiting Namakkal. That said, May — with days averaging 40.9°C and nights around 23.6°C (mean 32.3°C) and moderate rainfall (69 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 | 38.2°C | 23.4°C | 30.8°C | 120 mm | 68% | 2.5 m/s | 5.3 |
| 2024 | 43.3°C | 24.0°C | 33.7°C | 164 mm | 66% | 2.2 m/s | 5.1 |
| 2023 | 39.2°C | 23.2°C | 31.2°C | 104 mm | 70% | 1.9 m/s | 5.8 |
| 2022 | 39.0°C | 22.6°C | 30.8°C | 86 mm | 67% | 2.7 m/s | 5.4 |
| 2021 | 38.1°C | 23.0°C | 30.6°C | 114 mm | 68% | 2.5 m/s | 5.9 |
| 2020 | 41.8°C | 24.8°C | 33.3°C | 29 mm | 53% | 2.8 m/s | 6 |
| 2019 | 42.3°C | 25.2°C | 33.8°C | 36 mm | 53% | 2.2 m/s | 6.1 |
| 2018 | 37.7°C | 23.3°C | 30.5°C | 132 mm | 71% | 1.8 m/s | 5.6 |
| 2017 | 40.7°C | 22.1°C | 31.4°C | 92 mm | 64% | 2.3 m/s | 5.8 |
| 2016 | 42.6°C | 24.3°C | 33.4°C | 96 mm | 62% | 2.5 m/s | 5.9 |
| 2015 ❄️ | 37.1°C | 20.4°C | 28.7°C | 140 mm | 71% | 2 m/s | 5.6 |
| 2014 | 39.8°C | 23.3°C | 31.6°C | 125 mm | 66% | 2.3 m/s | 5.9 |
| 2013 | 42.6°C | 24.1°C | 33.4°C | 34 mm | 53% | 3 m/s | 5.9 |
| 2012 | 40.6°C | 24.1°C | 32.3°C | 69 mm | 66% | 2.6 m/s | 6 |
| 2011 | 39.6°C | 22.8°C | 31.2°C | 42 mm | 61% | 2.5 m/s | 6.5 |
| 2010 | 40.4°C | 24.2°C | 32.3°C | 86 mm | 64% | 2.5 m/s | 6.1 |
| 2009 | 42.6°C | 23.9°C | 33.2°C | 34 mm | 58% | 2.8 m/s | 5.9 |
| 2008 | 41.2°C | 23.3°C | 32.2°C | 57 mm | 61% | 2.8 m/s | 6.5 |
| 2007 | 41.4°C | 23.9°C | 32.7°C | 45 mm | 59% | 2.6 m/s | 6.4 |
| 2006 | 42.1°C | 23.5°C | 32.8°C | 77 mm | 61% | 2.8 m/s | 6 |
| 2005 | 40.9°C | 24.0°C | 32.4°C | 51 mm | 63% | 1.9 m/s | 6.3 |
| 2004 🌧️ | 40.1°C | 22.5°C | 31.3°C | 207 mm | 76% | 2.7 m/s | 5.4 |
| 2003 | 41.3°C | 24.4°C | 32.9°C | 95 mm | 63% | 3.1 m/s | 6 |
| 2002 | 41.6°C | 23.8°C | 32.7°C | 72 mm | 62% | 3 m/s | 6.3 |
| 2001 | 39.7°C | 22.9°C | 31.3°C | 45 mm | 62% | 2.9 m/s | 6.7 |
| 2000 | 41.3°C | 23.2°C | 32.2°C | 76 mm | 55% | 3 m/s | 6.4 |
| 1999 | 39.9°C | 22.9°C | 31.4°C | 81 mm | 67% | 2.6 m/s | 6.1 |
| 1998 | 42.5°C | 23.5°C | 33.0°C | 41 mm | 54% | 2.9 m/s | 5.8 |
| 1997 | 41.6°C | 24.3°C | 32.9°C | 40 mm | 54% | 2.7 m/s | 5.9 |
| 1996 | 41.5°C | 23.3°C | 32.4°C | 21 mm | 58% | 2.4 m/s | 6.3 |
| 1995 | 40.5°C | 23.1°C | 31.8°C | 125 mm | 66% | 2.7 m/s | 5.7 |
| 1994 | 40.6°C | 23.5°C | 32.0°C | 80 mm | 62% | 2.5 m/s | 6.4 |
| 1993 | 42.6°C | 23.5°C | 33.0°C | 34 mm | 53% | 2.6 m/s | 6.2 |
| 1992 | 42.0°C | 23.4°C | 32.7°C | 32 mm | 51% | 2.6 m/s | 6 |
| 1991 🔥 | 42.8°C | 25.5°C | 34.1°C | 1 mm | 47% | 2.4 m/s | 6.2 |
| 1990 | 41.2°C | 23.4°C | 32.3°C | 67 mm | 59% | 3.3 m/s | 5.4 |
| 1989 | 41.9°C | 23.3°C | 32.6°C | 24 mm | 52% | 3.5 m/s | 6.2 |
| 1988 | 41.3°C | 22.7°C | 32.0°C | 49 mm | 58% | 3.1 m/s | 5.8 |
| 1987 | 41.2°C | 23.7°C | 32.5°C | 15 mm | 48% | 2.2 m/s | 6.2 |
| 1986 | 42.9°C | 24.9°C | 33.9°C | 21 mm | 51% | 3.4 m/s | 6.3 |
| 1985 | 42.1°C | 23.7°C | 32.9°C | 14 mm | 50% | 3.2 m/s | 6.1 |
| 1984 | 41.0°C | 24.6°C | 32.8°C | 7 mm | 52% | 3 m/s | 6.4 |
| 1983 | 42.2°C | 24.4°C | 33.3°C | 58 mm | 54% | 2.3 m/s | — |
| 1982 | 40.0°C | 24.0°C | 32.0°C | 71 mm | 59% | 2 m/s | — |
| 1981 | 39.4°C | 23.3°C | 31.3°C | 89 mm | 63% | 2.4 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 40.9°C with lows near 23.6°C (mean 32.3°C), based on 45 years of NASA POWER data.
May averages 69 mm of rainfall in Namakkal, about average for rainfall. The wettest on record was 207 mm in 2004.
The hottest May reached 43.3°C in 2024. The coldest dipped to 20.4°C in 2015.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have fallen by about 1.1°C. Daytime highs moved from 40.9°C to 39.6°C and overnight lows from 24°C to 23.2°C over the same span.
May is one of the warmer months of the year in Namakkal and about average for rainfall, so plan for around 40.9°C daytime highs and 23.6°C at night.
Not quite — May is the 11th coolest month in Namakkal, averaging 32.3°C.
For May in Namakkal, pack light, breathable clothing and sun protection, with typical highs of 40.9°C and lows of 23.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 60% — moderately humid.
Average wind speed in May is 2.6 m/s. The windiest May on record averaged 3.5 m/s (1989).
The wettest May on record was 2004 with 207 mm. On average, May sees 69 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 Namakkal behaves each May, 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 May specifically, along with year-by-year records and how the month has changed over the decades.
