May is one of the warmer months of the year in Kottayam, with average highs near 31.4°C and lows around 26.7°C (mean 29.1°C). It is a relatively wet time of year, averaging 274 mm of rainfall and 80% relative humidity across the period.
May is one of the warmer months of the year in Kottayam. Across 45 years of records, the warmest Mays in Kottayam were 1998 and 2024 — when the month averaged 30.3°C — while the coldest was 1995 at 28°C. Typical May days reach 31.4°C with nights near 26.7°C. The long-term May temperature trend is broadly flat.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 28.8°C | 29.0°C | 28.8°C | 29.1°C | 29.6°C | +0.8°C |
| Avg High | 31.2°C | 31.5°C | 31.2°C | 31.3°C | 32.1°C | +0.9°C |
| Avg Low | 26.4°C | 26.6°C | 26.4°C | 27.0°C | 27.0°C | +0.6°C |
| Avg Rain | 181 mm | 221 mm | 352 mm | 232 mm | 445 mm | +263 mm |
May temperatures in Kottayam have risen by about 0.8°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 25.4°C (2004) to a record high of 33.1°C (1998).
Rainfall in May is a relatively wet time of year, averaging 274 mm, with a wettest year of 954 mm.
A quieter season to visit Kottayam
If your dates are flexible, the more temperate months of January and December tend to be the most comfortable for visiting Kottayam. That said, May — with days averaging 31.4°C and nights around 26.7°C (mean 29.1°C) and higher rainfall (274 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 | 32.4°C | 28.0°C | 30.2°C | 443 mm | 79% | 4.9 m/s | 4.8 |
| 2024 | 33.1°C | 27.4°C | 30.3°C | 605 mm | 79% | 4.1 m/s | 4.3 |
| 2023 | 32.0°C | 26.2°C | 29.1°C | 138 mm | 77% | 3 m/s | 5.7 |
| 2022 | 30.9°C | 26.6°C | 28.8°C | 413 mm | 83% | 4.1 m/s | 4.5 |
| 2021 | 31.6°C | 26.6°C | 29.1°C | 732 mm | 81% | 3.6 m/s | 4.8 |
| 2020 | 32.4°C | 27.4°C | 29.9°C | 335 mm | 80% | 3.7 m/s | 5.1 |
| 2019 | 31.7°C | 28.1°C | 29.9°C | 80 mm | 77% | 4.1 m/s | 5.7 |
| 2018 | 32.1°C | 26.7°C | 29.4°C | 293 mm | 81% | 4.1 m/s | 5 |
| 2017 | 32.1°C | 26.6°C | 29.3°C | 325 mm | 80% | 3.9 m/s | 5.2 |
| 2016 | 32.2°C | 27.0°C | 29.6°C | 292 mm | 79% | 3.9 m/s | 5 |
| 2015 | 30.8°C | 26.5°C | 28.7°C | 241 mm | 81% | 3.1 m/s | 4.9 |
| 2014 | 30.8°C | 27.4°C | 29.1°C | 260 mm | 81% | 3.5 m/s | 5.4 |
| 2013 | 31.1°C | 26.4°C | 28.8°C | 231 mm | 79% | 4.6 m/s | 5.1 |
| 2012 | 29.8°C | 26.7°C | 28.2°C | 137 mm | 82% | 4.2 m/s | 5.2 |
| 2011 | 31.1°C | 26.8°C | 28.9°C | 215 mm | 79% | 4.2 m/s | 5.6 |
| 2010 | 31.4°C | 27.6°C | 29.5°C | 245 mm | 80% | 4.1 m/s | 4.9 |
| 2009 | 31.0°C | 25.5°C | 28.2°C | 366 mm | 82% | 4 m/s | 5.1 |
| 2008 | 29.9°C | 26.7°C | 28.3°C | 179 mm | 82% | 3.8 m/s | 5.7 |
| 2007 | 31.2°C | 26.7°C | 28.9°C | 219 mm | 80% | 3.9 m/s | 5.5 |
| 2006 | 32.1°C | 26.7°C | 29.4°C | 598 mm | 80% | 4.2 m/s | 4.9 |
| 2005 | 31.2°C | 26.8°C | 29.0°C | 203 mm | 79% | 3.7 m/s | 5.5 |
| 2004 🌧️ | 31.2°C | 25.4°C | 28.3°C | 954 mm | 85% | 4.7 m/s | 4.3 |
| 2003 | 31.0°C | 27.2°C | 29.1°C | 242 mm | 81% | 4.2 m/s | 5.3 |
| 2002 | 32.8°C | 27.0°C | 29.9°C | 354 mm | 81% | 4.5 m/s | 5.1 |
| 2001 | 30.5°C | 26.5°C | 28.5°C | 280 mm | 81% | 4 m/s | 5.2 |
| 2000 | 30.9°C | 25.7°C | 28.3°C | 127 mm | 80% | 4.3 m/s | 5.8 |
| 1999 | 30.8°C | 25.8°C | 28.3°C | 374 mm | 84% | 4.6 m/s | 4.5 |
| 1998 🔥 | 33.1°C | 27.6°C | 30.3°C | 258 mm | 78% | 3.8 m/s | 5.1 |
| 1997 | 31.5°C | 26.8°C | 29.2°C | 77 mm | 77% | 3.8 m/s | 5.2 |
| 1996 | 31.2°C | 26.9°C | 29.0°C | 21 mm | 77% | 4.1 m/s | 5.6 |
| 1995 ❄️ | 30.2°C | 25.8°C | 28.0°C | 459 mm | 81% | 4.2 m/s | 5 |
| 1994 | 31.4°C | 26.1°C | 28.7°C | 207 mm | 79% | 4.5 m/s | 5.1 |
| 1993 | 31.3°C | 26.6°C | 28.9°C | 193 mm | 80% | 3.8 m/s | 5.1 |
| 1992 | 32.1°C | 26.5°C | 29.3°C | 212 mm | 79% | 3.9 m/s | 5.4 |
| 1991 | 32.5°C | 27.8°C | 30.2°C | 46 mm | 75% | 3.7 m/s | 5.6 |
| 1990 | 30.9°C | 26.2°C | 28.5°C | 360 mm | 79% | 4.8 m/s | 4.5 |
| 1989 | 31.8°C | 26.4°C | 29.1°C | 275 mm | 79% | 4.8 m/s | 4.8 |
| 1988 | 30.6°C | 27.0°C | 28.8°C | 95 mm | 80% | 4.5 m/s | 5 |
| 1987 | 32.1°C | 27.5°C | 29.8°C | 139 mm | 75% | 3.4 m/s | 5.8 |
| 1986 | 30.7°C | 26.0°C | 28.3°C | 151 mm | 80% | 4.1 m/s | 5.5 |
| 1985 | 31.9°C | 26.0°C | 28.9°C | 392 mm | 78% | 4.6 m/s | 5 |
| 1984 | 31.0°C | 26.0°C | 28.5°C | 123 mm | 80% | 4.2 m/s | 5.6 |
| 1983 | 31.6°C | 26.9°C | 29.3°C | 26 mm | 76% | 3.9 m/s | — |
| 1982 | 30.3°C | 26.0°C | 28.1°C | 273 mm | 81% | 3.2 m/s | — |
| 1981 | 31.1°C | 26.2°C | 28.7°C | 158 mm | 78% | 4 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 31.4°C with lows near 26.7°C (mean 29.1°C), based on 45 years of NASA POWER data.
May averages 274 mm of rainfall in Kottayam, a relatively wet time of year. The wettest on record was 954 mm in 2004.
The hottest May reached 33.1°C in 1998. The coldest dipped to 25.4°C in 2004.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 0.8°C. Daytime highs moved from 31.2°C to 32°C and overnight lows from 26.2°C to 27°C over the same span.
May is one of the warmer months of the year in Kottayam and a relatively wet time of year, so plan for around 31.4°C daytime highs and 26.7°C at night.
Not quite — May is the 10th coolest month in Kottayam, averaging 29.1°C.
For May in Kottayam, pack light, breathable clothing and sun protection, with typical highs of 31.4°C and lows of 26.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 80% — quite humid.
Average wind speed in May is 4.1 m/s. The windiest May on record averaged 4.9 m/s (2025).
The wettest May on record was 2004 with 954 mm. On average, May sees 274 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 Kottayam 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.
