May is one of the warmer months of the year in Pathanamthitta, with average highs near 29.9°C and lows around 23.4°C (mean 26.7°C). It is a relatively wet time of year, averaging 231 mm of rainfall and 82% relative humidity across the period.
May is one of the warmer months of the year in Pathanamthitta. Across 45 years of records, the warmest May in Pathanamthitta was 1991 — when the month averaged 28.9°C — while the coldest was 1999 at 24.9°C. Typical May days reach 29.9°C with nights near 23.4°C. The long-term May temperature trend is broadly flat.
May is a relatively wet time of year in Pathanamthitta, averaging 231 mm of rainfall. The wettest May on record was 2004 with 813 mm, while the driest was 1996 at 18 mm.
Relative humidity in Pathanamthitta during May averages 82%. The most humid May was 2004 at 90%, and the least humid was 1991 at 71%.
May receives about 5.2 kWh/m²/day of solar energy in Pathanamthitta. The sunniest Mays were 1987 and 2000 at 5.8 kWh/m²/day, and the cloudiest were 2004 and 2024 at 4.3.
Average wind speed in Pathanamthitta during May is 0.8 m/s. The windiest Mays were 1989 and 1990 at 1 m/s, while the calmest were 1982, 2015 and 2023 at 0.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 26.7°C | 26.9°C | 26.2°C | 26.8°C | 26.5°C | -0.2°C |
| Avg High | 30.3°C | 30.5°C | 29.2°C | 29.9°C | 29.4°C | -0.9°C |
| Avg Low | 23.2°C | 23.4°C | 23.3°C | 23.6°C | 23.7°C | +0.5°C |
| Avg Rain | 170 mm | 196 mm | 294 mm | 191 mm | 343 mm | +173 mm |
May temperatures in Pathanamthitta have fallen by about 0.3°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 20.4°C (2007) to a record high of 37.4°C (1991).
Rainfall in May is a relatively wet time of year, averaging 231 mm, with a wettest year of 813 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.2°C per decade while lows rose 0.1°C per decade, narrowing the gap between day and night.
A quieter season to visit Pathanamthitta
If your dates are flexible, the more temperate months of January and December tend to be the most comfortable for visiting Pathanamthitta. That said, May — with days averaging 29.9°C and nights around 23.4°C (mean 26.7°C) and higher rainfall (231 mm) — can still be rewarding for travellers who don't mind the warmth, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 28.7°C | 26.3°C | 24.0°C | 31.1°C | 22.5°C | 339 mm | 87% | 0.9 m/s | 4.8 |
| 2024 | 30.9°C | 27.7°C | 24.5°C | 36.0°C | 22.6°C | 450 mm | 82% | 0.8 m/s | 4.3 |
| 2023 | 30.2°C | 26.8°C | 23.4°C | 33.0°C | 21.4°C | 153 mm | 84% | 0.6 m/s | 5.7 |
| 2022 | 28.1°C | 25.6°C | 23.1°C | 30.9°C | 21.9°C | 289 mm | 88% | 0.8 m/s | 4.5 |
| 2021 | 28.3°C | 25.6°C | 22.9°C | 31.8°C | 21.8°C | 565 mm | 89% | 0.7 m/s | 4.8 |
| 2020 | 30.3°C | 27.2°C | 24.0°C | 35.7°C | 22.2°C | 264 mm | 84% | 0.7 m/s | 5.1 |
| 2019 | 32.2°C | 28.3°C | 24.3°C | 36.4°C | 22.7°C | 70 mm | 77% | 0.8 m/s | 5.7 |
| 2018 | 29.4°C | 26.4°C | 23.3°C | 34.3°C | 22.1°C | 231 mm | 85% | 0.8 m/s | 5 |
| 2017 | 30.4°C | 27.1°C | 23.8°C | 34.5°C | 22.6°C | 251 mm | 82% | 0.8 m/s | 5.2 |
| 2016 | 30.5°C | 27.2°C | 23.9°C | 35.1°C | 22.5°C | 237 mm | 82% | 0.8 m/s | 5 |
| 2015 | 29.2°C | 26.3°C | 23.3°C | 32.6°C | 21.7°C | 230 mm | 86% | 0.6 m/s | 4.9 |
| 2014 | 29.2°C | 26.3°C | 23.4°C | 33.2°C | 21.9°C | 237 mm | 86% | 0.7 m/s | 5.4 |
| 2013 | 30.0°C | 26.8°C | 23.7°C | 33.9°C | 21.8°C | 180 mm | 80% | 0.9 m/s | 5.1 |
| 2012 | 28.4°C | 25.8°C | 23.2°C | 31.6°C | 21.6°C | 118 mm | 86% | 0.8 m/s | 5.2 |
| 2011 | 30.3°C | 26.7°C | 23.2°C | 34.3°C | 20.9°C | 160 mm | 80% | 0.8 m/s | 5.6 |
| 2010 | 29.8°C | 26.8°C | 23.9°C | 33.8°C | 21.9°C | 193 mm | 84% | 0.8 m/s | 4.9 |
| 2009 | 29.3°C | 26.4°C | 23.5°C | 33.4°C | 21.4°C | 285 mm | 84% | 0.8 m/s | 5.1 |
| 2008 | 28.6°C | 25.8°C | 22.9°C | 30.0°C | 21.5°C | 142 mm | 85% | 0.7 m/s | 5.7 |
| 2007 | 30.1°C | 26.7°C | 23.3°C | 33.3°C | 20.4°C | 181 mm | 81% | 0.8 m/s | 5.5 |
| 2006 | 29.9°C | 26.7°C | 23.5°C | 34.1°C | 22.1°C | 481 mm | 81% | 0.8 m/s | 4.9 |
| 2005 | 30.0°C | 26.6°C | 23.3°C | 32.7°C | 22.3°C | 193 mm | 84% | 0.7 m/s | 5.5 |
| 2004 🌧️ | 27.4°C | 25.2°C | 23.0°C | 34.4°C | 21.7°C | 813 mm | 90% | 0.9 m/s | 4.3 |
| 2003 | 29.0°C | 26.3°C | 23.6°C | 31.5°C | 22.4°C | 198 mm | 86% | 0.8 m/s | 5.3 |
| 2002 | 29.3°C | 26.4°C | 23.5°C | 37.0°C | 22.4°C | 307 mm | 84% | 0.9 m/s | 5.1 |
| 2001 | 28.3°C | 25.7°C | 23.1°C | 31.0°C | 21.6°C | 238 mm | 87% | 0.8 m/s | 5.2 |
| 2000 | 30.0°C | 26.6°C | 23.2°C | 33.4°C | 21.6°C | 99 mm | 79% | 0.9 m/s | 5.8 |
| 1999 ❄️ | 27.4°C | 24.9°C | 22.5°C | 33.1°C | 21.5°C | 339 mm | 87% | 0.9 m/s | 4.5 |
| 1998 | 31.7°C | 28.0°C | 24.2°C | 37.4°C | 22.5°C | 249 mm | 79% | 0.7 m/s | 5.1 |
| 1997 | 30.4°C | 26.7°C | 23.1°C | 33.9°C | 21.4°C | 82 mm | 78% | 0.8 m/s | 5.2 |
| 1996 | 32.1°C | 27.8°C | 23.6°C | 34.8°C | 22.6°C | 18 mm | 74% | 0.9 m/s | 5.6 |
| 1995 | 28.3°C | 25.6°C | 22.8°C | 32.9°C | 20.9°C | 380 mm | 86% | 0.8 m/s | 5 |
| 1994 | 30.3°C | 26.9°C | 23.5°C | 34.0°C | 22.2°C | 196 mm | 80% | 0.9 m/s | 5.1 |
| 1993 | 30.9°C | 27.1°C | 23.4°C | 34.6°C | 22.0°C | 171 mm | 79% | 0.8 m/s | 5.1 |
| 1992 | 30.8°C | 27.0°C | 23.2°C | 34.7°C | 21.9°C | 179 mm | 80% | 0.8 m/s | 5.4 |
| 1991 🔥 | 33.2°C | 28.9°C | 24.5°C | 37.4°C | 23.4°C | 39 mm | 71% | 0.8 m/s | 5.6 |
| 1990 | 29.4°C | 26.3°C | 23.2°C | 34.7°C | 21.9°C | 311 mm | 82% | 1 m/s | 4.5 |
| 1989 | 29.8°C | 26.5°C | 23.3°C | 34.3°C | 22.0°C | 229 mm | 80% | 1 m/s | 4.8 |
| 1988 | 29.5°C | 26.6°C | 23.6°C | 32.4°C | 22.1°C | 76 mm | 83% | 0.9 m/s | 5 |
| 1987 | 32.4°C | 27.9°C | 23.4°C | 36.3°C | 22.1°C | 142 mm | 74% | 0.7 m/s | 5.8 |
| 1986 | 29.4°C | 26.1°C | 22.9°C | 32.5°C | 21.1°C | 152 mm | 82% | 0.8 m/s | 5.5 |
| 1985 | 31.1°C | 27.1°C | 23.2°C | 36.5°C | 22.0°C | 316 mm | 77% | 0.9 m/s | 5 |
| 1984 | 30.2°C | 26.7°C | 23.2°C | 33.4°C | 21.9°C | 112 mm | 81% | 0.8 m/s | 5.6 |
| 1983 | 31.8°C | 27.7°C | 23.7°C | 35.6°C | 22.6°C | 39 mm | 75% | 0.8 m/s | — |
| 1982 | 28.9°C | 25.8°C | 22.7°C | 31.2°C | 21.8°C | 276 mm | 86% | 0.6 m/s | — |
| 1981 | 29.2°C | 26.1°C | 23.1°C | 32.8°C | 22.0°C | 189 mm | 83% | 0.8 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 29.9°C with lows near 23.4°C (mean 26.7°C), based on 45 years of NASA POWER data.
May averages 231 mm of rainfall in Pathanamthitta, a relatively wet time of year. The wettest on record was 813 mm in 2004.
The hottest May reached 37.4°C in 1991. The coldest dipped to 20.4°C in 2007.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have fallen by about 0.3°C — but days and nights have moved in opposite directions. Overnight lows rose from 23.2°C to 23.6°C while daytime highs eased from 30.2°C to 29.2°C, narrowing the gap between day and night.
May is one of the warmer months of the year in Pathanamthitta and a relatively wet time of year, so plan for around 29.9°C daytime highs and 23.4°C at night.
Not quite — May is the 10th coolest month in Pathanamthitta, averaging 26.7°C.
For May in Pathanamthitta, pack light layers you can adjust through the day, with typical highs of 29.9°C and lows of 23.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 82% — quite humid.
Average wind speed in May is 0.8 m/s. The windiest May on record averaged 1 m/s (1989).
The wettest May on record was 2004 with 813 mm. On average, May sees 231 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 Pathanamthitta 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.
