May is one of the warmer months of the year in West Champaran, with average highs near 44.3°C and lows around 22.7°C (mean 33.5°C). It is one of the drier months, averaging 68 mm of rainfall and 34% relative humidity across the period.
May is one of the warmer months of the year in West Champaran. Across 45 years of records, the warmest May in West Champaran was 1991 — when the month averaged 35.5°C — while the coldest was 1986 at 31.3°C. Typical May days reach 44.3°C with nights near 22.7°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 | 33.1°C | 34.6°C | 33.4°C | 33.5°C | 32.7°C | -0.4°C |
| Avg High | 44.6°C | 45.9°C | 43.8°C | 43.8°C | 43.0°C | -1.6°C |
| Avg Low | 21.7°C | 23.3°C | 22.9°C | 23.1°C | 22.5°C | +0.8°C |
| Avg Rain | 48 mm | 24 mm | 77 mm | 84 mm | 130 mm | +83 mm |
May temperatures in West Champaran have fallen by about 0.6°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 19.5°C (2004) to a record high of 47.6°C (1998).
Rainfall in May is one of the drier months, averaging 68 mm, with a wettest year of 321 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.5°C per decade while lows rose 0.1°C per decade, narrowing the gap between day and night.
A quieter season to visit West Champaran
If your dates are flexible, the more temperate months of November and February tend to be the most comfortable for visiting West Champaran. That said, May — with days averaging 44.3°C and nights around 22.7°C (mean 33.5°C) and moderate rainfall (68 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 | 42.5°C | 23.8°C | 33.1°C | 110 mm | 46% | 2.3 m/s | 5.5 |
| 2024 | 46.7°C | 22.1°C | 34.4°C | 58 mm | 38% | 2.4 m/s | 5.8 |
| 2023 | 42.6°C | 22.1°C | 32.3°C | 57 mm | 37% | 2 m/s | 6.3 |
| 2022 | 41.6°C | 23.7°C | 32.6°C | 109 mm | 46% | 1.9 m/s | 5.9 |
| 2021 🌧️ | 41.1°C | 22.2°C | 31.6°C | 321 mm | 51% | 2.1 m/s | 4.7 |
| 2020 | 43.7°C | 21.0°C | 32.4°C | 126 mm | 47% | 2 m/s | 6.1 |
| 2019 | 44.1°C | 20.9°C | 32.5°C | 52 mm | 30% | 2.3 m/s | 6.7 |
| 2018 | 42.0°C | 23.7°C | 32.9°C | 96 mm | 46% | 2.3 m/s | 5.9 |
| 2017 | 43.9°C | 21.6°C | 32.8°C | 95 mm | 39% | 2.1 m/s | 6 |
| 2016 | 43.3°C | 25.1°C | 34.2°C | 114 mm | 38% | 2 m/s | 5.8 |
| 2015 | 44.5°C | 22.6°C | 33.6°C | 47 mm | 33% | 1.7 m/s | 6.5 |
| 2014 | 44.8°C | 23.9°C | 34.3°C | 127 mm | 34% | 2.5 m/s | 6.7 |
| 2013 | 43.3°C | 22.0°C | 32.7°C | 100 mm | 33% | 1.8 m/s | 6.1 |
| 2012 | 45.6°C | 23.8°C | 34.7°C | 9 mm | 21% | 2.1 m/s | 6.9 |
| 2011 | 41.9°C | 23.7°C | 32.8°C | 140 mm | 44% | 2 m/s | 6.3 |
| 2010 | 44.3°C | 24.1°C | 34.2°C | 65 mm | 37% | 2.5 m/s | 6.4 |
| 2009 | 43.9°C | 23.5°C | 33.7°C | 115 mm | 43% | 2.5 m/s | 6.3 |
| 2008 | 42.5°C | 23.9°C | 33.2°C | 114 mm | 38% | 1.8 m/s | 6.3 |
| 2007 | 43.1°C | 24.4°C | 33.8°C | 73 mm | 41% | 2 m/s | 6.6 |
| 2006 | 43.1°C | 25.1°C | 34.1°C | 123 mm | 44% | 2 m/s | 5.9 |
| 2005 | 45.0°C | 20.8°C | 32.9°C | 25 mm | 28% | 1.9 m/s | 6.9 |
| 2004 | 43.8°C | 19.5°C | 31.6°C | 86 mm | 38% | 1.9 m/s | 6.7 |
| 2003 | 45.0°C | 21.1°C | 33.0°C | 7 mm | 24% | 2.4 m/s | 6.7 |
| 2002 | 44.9°C | 23.0°C | 34.0°C | 90 mm | 43% | 2.7 m/s | 6 |
| 2001 | 42.6°C | 24.9°C | 33.7°C | 68 mm | 39% | 2.2 m/s | 6.4 |
| 2000 | 44.2°C | 23.2°C | 33.7°C | 64 mm | 39% | 2.2 m/s | 6 |
| 1999 | 45.8°C | 22.4°C | 34.1°C | 50 mm | 34% | 2.2 m/s | 6.4 |
| 1998 | 47.6°C | 22.9°C | 35.2°C | 34 mm | 32% | 2.3 m/s | 6.9 |
| 1997 | 45.1°C | 20.7°C | 32.9°C | 22 mm | 20% | 2.4 m/s | 6.9 |
| 1996 | 45.9°C | 23.7°C | 34.8°C | 7 mm | 19% | 2.1 m/s | 7 |
| 1995 | 45.8°C | 25.0°C | 35.4°C | 4 mm | 21% | 2.6 m/s | 7.4 |
| 1994 | 44.9°C | 23.0°C | 33.9°C | 22 mm | 25% | 2.4 m/s | 6.8 |
| 1993 | 46.6°C | 23.6°C | 35.1°C | 44 mm | 28% | 2.1 m/s | 7.2 |
| 1992 | 45.0°C | 22.2°C | 33.6°C | 33 mm | 26% | 2.5 m/s | 6.8 |
| 1991 🔥 | 46.1°C | 24.9°C | 35.5°C | 11 mm | 20% | 2.4 m/s | 7.2 |
| 1990 | 45.8°C | 24.7°C | 35.2°C | 16 mm | 29% | 2.1 m/s | 6.4 |
| 1989 | 45.7°C | 20.2°C | 32.9°C | 47 mm | 29% | 3 m/s | 7.3 |
| 1988 | 45.3°C | 22.0°C | 33.6°C | 66 mm | 34% | 2.3 m/s | 7.2 |
| 1987 | 45.7°C | 20.0°C | 32.8°C | 21 mm | 26% | 2.3 m/s | 7 |
| 1986 ❄️ | 42.5°C | 20.2°C | 31.3°C | 44 mm | 29% | 2.3 m/s | 7.2 |
| 1985 | 45.4°C | 23.7°C | 34.6°C | 24 mm | 24% | 2.2 m/s | 7.5 |
| 1984 | 46.5°C | 22.0°C | 34.2°C | 28 mm | 29% | 2.8 m/s | 7 |
| 1983 | 43.4°C | 22.8°C | 33.1°C | 37 mm | 29% | 1.9 m/s | — |
| 1982 | 44.4°C | 20.3°C | 32.3°C | 46 mm | 30% | 2.1 m/s | — |
| 1981 | 42.1°C | 23.7°C | 32.9°C | 116 mm | 40% | 2.2 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 44.3°C with lows near 22.7°C (mean 33.5°C), based on 45 years of NASA POWER data.
May averages 68 mm of rainfall in West Champaran, one of the drier months. The wettest on record was 321 mm in 2021.
The hottest May reached 47.6°C in 1998. The coldest dipped to 19.5°C in 2004.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have fallen by about 0.6°C. Daytime highs moved from 44.4°C to 42.9°C and overnight lows from 22.5°C to 22.8°C over the same span.
May is one of the warmer months of the year in West Champaran and one of the drier months, so plan for around 44.3°C daytime highs and 22.7°C at night.
Not quite — May is the 11th coolest month in West Champaran, averaging 33.5°C.
For May in West Champaran, pack light, breathable clothing and sun protection, with typical highs of 44.3°C and lows of 22.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 34% — relatively dry.
Average wind speed in May is 2.2 m/s. The windiest May on record averaged 3 m/s (1989).
The wettest May on record was 2021 with 321 mm. On average, May sees 68 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 West Champaran 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.
