May is one of the warmer months of the year in Purnia, with average highs near 42.9°C and lows around 22.5°C (mean 32.7°C). It is about average for rainfall, averaging 110 mm of rainfall and 48% relative humidity across the period.
May is one of the warmer months of the year in Purnia. Across 45 years of records, the warmest May in Purnia was 1995 — when the month averaged 35.5°C — while the coldest was 1986 at 30.4°C. Typical May days reach 42.9°C with nights near 22.5°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 | 32.4°C | 33.5°C | 32.2°C | 32.8°C | 32.1°C | -0.3°C |
| Avg High | 43.0°C | 44.2°C | 42.2°C | 42.8°C | 41.7°C | -1.3°C |
| Avg Low | 21.8°C | 22.7°C | 22.3°C | 22.9°C | 22.6°C | +0.8°C |
| Avg Rain | 101 mm | 60 mm | 99 mm | 138 mm | 176 mm | +75 mm |
May temperatures in Purnia have stayed relatively stable across the record.
May has ranged from a record low of 19.6°C (1986) to a record high of 46.1°C (1991).
Rainfall in May is about average for rainfall, averaging 110 mm, with a wettest year of 328 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.3°C per decade while lows rose 0.2°C per decade, narrowing the gap between day and night.
A quieter season to visit Purnia
If your dates are flexible, the more temperate months of November and February tend to be the most comfortable for visiting Purnia. That said, May — with days averaging 42.9°C and nights around 22.5°C (mean 32.7°C) and higher rainfall (110 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 | 42.0°C | 22.5°C | 32.2°C | 134 mm | 59% | 2.4 m/s | 5.2 |
| 2024 | 43.9°C | 22.1°C | 33.0°C | 171 mm | 49% | 2.6 m/s | 5.3 |
| 2023 | 43.1°C | 23.0°C | 33.0°C | 81 mm | 43% | 2 m/s | 6 |
| 2022 | 40.5°C | 23.6°C | 32.0°C | 189 mm | 61% | 2 m/s | 5.3 |
| 2021 🌧️ | 39.9°C | 22.2°C | 31.0°C | 328 mm | 61% | 2.2 m/s | 4.6 |
| 2020 | 40.9°C | 22.1°C | 31.5°C | 153 mm | 61% | 2 m/s | 5.2 |
| 2019 | 43.8°C | 20.9°C | 32.3°C | 70 mm | 47% | 2.5 m/s | 6 |
| 2018 | 40.3°C | 22.6°C | 31.5°C | 106 mm | 63% | 2.5 m/s | 5.4 |
| 2017 | 41.2°C | 22.7°C | 31.9°C | 156 mm | 59% | 2.2 m/s | 5.6 |
| 2016 | 43.0°C | 24.6°C | 33.8°C | 194 mm | 52% | 1.8 m/s | 5.4 |
| 2015 | 43.0°C | 23.8°C | 33.4°C | 108 mm | 49% | 1.7 m/s | 5.7 |
| 2014 | 43.8°C | 23.4°C | 33.6°C | 174 mm | 45% | 2.3 m/s | 6.1 |
| 2013 | 43.2°C | 21.9°C | 32.5°C | 173 mm | 50% | 1.8 m/s | 5.2 |
| 2012 | 45.2°C | 22.9°C | 34.0°C | 67 mm | 40% | 2.3 m/s | 6.3 |
| 2011 | 40.3°C | 22.8°C | 31.5°C | 164 mm | 57% | 2 m/s | 5.8 |
| 2010 | 43.8°C | 23.3°C | 33.5°C | 173 mm | 55% | 2 m/s | 5.7 |
| 2009 | 43.1°C | 22.3°C | 32.7°C | 120 mm | 53% | 2.6 m/s | 5.6 |
| 2008 | 41.6°C | 24.1°C | 32.8°C | 90 mm | 49% | 1.9 m/s | 6 |
| 2007 | 41.2°C | 22.5°C | 31.8°C | 178 mm | 53% | 1.7 m/s | 6.5 |
| 2006 | 41.5°C | 22.8°C | 32.1°C | 98 mm | 51% | 2.4 m/s | 5.8 |
| 2005 | 43.6°C | 21.9°C | 32.7°C | 75 mm | 46% | 2.1 m/s | 5.9 |
| 2004 | 43.1°C | 20.1°C | 31.6°C | 71 mm | 45% | 2.2 m/s | 6 |
| 2003 | 41.8°C | 22.2°C | 32.0°C | 93 mm | 45% | 2.1 m/s | 6.3 |
| 2002 | 43.7°C | 21.6°C | 32.7°C | 100 mm | 56% | 2.8 m/s | 5.7 |
| 2001 | 41.4°C | 22.9°C | 32.2°C | 78 mm | 53% | 2.4 m/s | 6 |
| 2000 | 40.8°C | 22.8°C | 31.8°C | 87 mm | 58% | 2.4 m/s | 5.3 |
| 1999 | 42.5°C | 22.8°C | 32.7°C | 156 mm | 54% | 2.1 m/s | 5.7 |
| 1998 | 45.1°C | 22.9°C | 34.0°C | 49 mm | 47% | 2.4 m/s | 6.4 |
| 1997 | 44.3°C | 20.3°C | 32.3°C | 47 mm | 32% | 2.3 m/s | 6.4 |
| 1996 | 43.6°C | 21.0°C | 32.3°C | 68 mm | 38% | 1.9 m/s | 6.5 |
| 1995 🔥 | 45.9°C | 25.1°C | 35.5°C | 29 mm | 33% | 2.3 m/s | 6.5 |
| 1994 | 45.3°C | 22.4°C | 33.8°C | 38 mm | 34% | 2.3 m/s | 6.9 |
| 1993 | 44.6°C | 24.1°C | 34.4°C | 30 mm | 40% | 2.2 m/s | 6.6 |
| 1992 | 43.2°C | 21.3°C | 32.2°C | 80 mm | 43% | 2.2 m/s | 6.4 |
| 1991 | 46.1°C | 23.7°C | 34.9°C | 28 mm | 35% | 2.6 m/s | 5.9 |
| 1990 | 41.4°C | 23.7°C | 32.5°C | 77 mm | 47% | 2.2 m/s | 6.3 |
| 1989 | 45.9°C | 21.5°C | 33.7°C | 92 mm | 40% | 3.1 m/s | 6.4 |
| 1988 | 44.9°C | 23.3°C | 34.1°C | 68 mm | 45% | 2.4 m/s | 7.1 |
| 1987 | 43.3°C | 20.7°C | 32.0°C | 62 mm | 38% | 1.8 m/s | 7 |
| 1986 ❄️ | 41.3°C | 19.6°C | 30.4°C | 92 mm | 42% | 2 m/s | 6.2 |
| 1985 | 43.2°C | 22.0°C | 32.6°C | 71 mm | 41% | 2.1 m/s | 7 |
| 1984 | 43.7°C | 22.3°C | 33.0°C | 132 mm | 51% | 2.8 m/s | 6.2 |
| 1983 | 42.0°C | 22.4°C | 32.2°C | 93 mm | 47% | 1.9 m/s | — |
| 1982 | 43.2°C | 21.1°C | 32.2°C | 46 mm | 42% | 1.6 m/s | — |
| 1981 | 39.6°C | 23.1°C | 31.4°C | 253 mm | 61% | 1.9 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 42.9°C with lows near 22.5°C (mean 32.7°C), based on 45 years of NASA POWER data.
May averages 110 mm of rainfall in Purnia, about average for rainfall. The wettest on record was 328 mm in 2021.
The hottest May reached 46.1°C in 1991. The coldest dipped to 19.6°C in 1986.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have fallen by about 0.1°C. Daytime highs moved from 42.3°C to 41.9°C and overnight lows from 22.2°C to 22.7°C over the same span.
May is one of the warmer months of the year in Purnia and about average for rainfall, so plan for around 42.9°C daytime highs and 22.5°C at night.
Not quite — May is the 11th coolest month in Purnia, averaging 32.7°C.
For May in Purnia, pack light, breathable clothing and sun protection, with typical highs of 42.9°C and lows of 22.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 48% — relatively dry.
Average wind speed in May is 2.2 m/s. The windiest May on record averaged 3.1 m/s (1989).
The wettest May on record was 2021 with 328 mm. On average, May sees 110 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 Purnia 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.
