May is one of the warmer months of the year in Patna, with average highs near 46°C and lows around 23.9°C (mean 35°C). It is one of the drier months, averaging 42 mm of rainfall and 32% relative humidity across the period.
May is one of the warmer months of the year in Patna. Across 45 years of records, the warmest May in Patna was 1998 — when the month averaged 36.7°C — while the coldest was 1986 at 32.2°C. Typical May days reach 46°C with nights near 23.9°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 | 34.4°C | 35.6°C | 34.6°C | 35.3°C | 34.6°C | +0.2°C |
| Avg High | 46.1°C | 46.9°C | 45.3°C | 46.0°C | 45.4°C | -0.7°C |
| Avg Low | 22.8°C | 24.4°C | 24.0°C | 24.6°C | 23.7°C | +0.9°C |
| Avg Rain | 23 mm | 23 mm | 52 mm | 46 mm | 77 mm | +53 mm |
May temperatures in Patna have fallen by about 0.4°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 20.5°C (1982) to a record high of 48.6°C (1998).
Rainfall in May is one of the drier months, averaging 42 mm, with a wettest year of 227 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.2°C per decade while lows rose 0.2°C per decade, narrowing the gap between day and night.
A quieter season to visit Patna
If your dates are flexible, the more temperate months of November and February tend to be the most comfortable for visiting Patna. That said, May — with days averaging 46°C and nights around 23.9°C (mean 35°C) and moderate rainfall (42 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 | 44.1°C | 23.9°C | 34.0°C | 48 mm | 43% | 2.6 m/s | 5.5 |
| 2024 | 47.9°C | 22.7°C | 35.3°C | 45 mm | 35% | 2.8 m/s | 5.9 |
| 2023 | 44.1°C | 22.3°C | 33.2°C | 23 mm | 33% | 2.1 m/s | 6.4 |
| 2022 | 44.9°C | 25.8°C | 35.4°C | 51 mm | 41% | 2.3 m/s | 5.8 |
| 2021 🌧️ | 43.5°C | 24.6°C | 34.1°C | 227 mm | 47% | 2.5 m/s | 4.8 |
| 2020 | 47.6°C | 22.9°C | 35.3°C | 67 mm | 41% | 2.4 m/s | 6.1 |
| 2019 | 46.3°C | 23.4°C | 34.9°C | 8 mm | 23% | 2.7 m/s | 6.7 |
| 2018 | 45.9°C | 24.0°C | 35.0°C | 25 mm | 40% | 2.5 m/s | 6 |
| 2017 | 45.6°C | 25.1°C | 35.4°C | 47 mm | 35% | 2.3 m/s | 6.1 |
| 2016 | 45.9°C | 25.3°C | 35.6°C | 76 mm | 35% | 2.1 m/s | 5.9 |
| 2015 | 46.9°C | 25.5°C | 36.2°C | 18 mm | 28% | 2 m/s | 6.4 |
| 2014 | 45.8°C | 24.0°C | 34.9°C | 73 mm | 31% | 3.2 m/s | 6.5 |
| 2013 | 45.5°C | 23.3°C | 34.4°C | 91 mm | 30% | 2.3 m/s | 6.1 |
| 2012 | 46.9°C | 24.6°C | 35.8°C | 14 mm | 23% | 2 m/s | 6.8 |
| 2011 | 45.0°C | 25.4°C | 35.2°C | 52 mm | 39% | 2.4 m/s | 6.3 |
| 2010 | 46.3°C | 25.7°C | 36.0°C | 59 mm | 36% | 2.4 m/s | 6.3 |
| 2009 | 45.6°C | 24.5°C | 35.0°C | 56 mm | 39% | 3 m/s | 6.1 |
| 2008 | 43.7°C | 24.2°C | 34.0°C | 62 mm | 36% | 1.9 m/s | 6.3 |
| 2007 | 44.1°C | 25.9°C | 35.0°C | 56 mm | 39% | 2.3 m/s | 6.7 |
| 2006 | 45.2°C | 25.8°C | 35.5°C | 40 mm | 40% | 2.3 m/s | 6.1 |
| 2005 | 46.3°C | 21.5°C | 33.9°C | 10 mm | 27% | 2.3 m/s | 6.8 |
| 2004 | 46.6°C | 20.5°C | 33.5°C | 35 mm | 30% | 2.3 m/s | 6.7 |
| 2003 | 45.6°C | 20.9°C | 33.3°C | 13 mm | 25% | 2.4 m/s | 6.7 |
| 2002 | 44.6°C | 23.6°C | 34.1°C | 125 mm | 45% | 2.8 m/s | 6.1 |
| 2001 | 45.9°C | 26.7°C | 36.3°C | 66 mm | 37% | 2.4 m/s | 6.5 |
| 2000 | 45.7°C | 25.9°C | 35.8°C | 56 mm | 38% | 2.3 m/s | 5.9 |
| 1999 | 47.4°C | 23.1°C | 35.2°C | 77 mm | 38% | 2.2 m/s | 6.5 |
| 1998 🔥 | 48.6°C | 24.7°C | 36.7°C | 14 mm | 31% | 2.4 m/s | 6.8 |
| 1997 | 45.8°C | 22.1°C | 34.0°C | 28 mm | 21% | 2.4 m/s | 6.6 |
| 1996 | 47.7°C | 23.8°C | 35.8°C | 1 mm | 18% | 2.3 m/s | 6.7 |
| 1995 | 46.2°C | 26.0°C | 36.1°C | 1 mm | 23% | 2.8 m/s | 7 |
| 1994 | 45.7°C | 24.6°C | 35.1°C | 32 mm | 26% | 2.3 m/s | 6.7 |
| 1993 | 47.8°C | 24.7°C | 36.2°C | 14 mm | 27% | 2.2 m/s | 7.3 |
| 1992 | 46.6°C | 23.2°C | 34.9°C | 42 mm | 28% | 2.6 m/s | 6.8 |
| 1991 | 47.2°C | 25.5°C | 36.4°C | 9 mm | 21% | 2.8 m/s | 6.9 |
| 1990 | 46.0°C | 25.8°C | 35.9°C | 14 mm | 31% | 2.3 m/s | 6.5 |
| 1989 | 45.7°C | 21.5°C | 33.6°C | 38 mm | 30% | 3.5 m/s | 7.2 |
| 1988 | 48.4°C | 24.5°C | 36.5°C | 12 mm | 29% | 2.6 m/s | 7.1 |
| 1987 | 46.4°C | 20.6°C | 33.5°C | 14 mm | 26% | 2.5 m/s | 6.9 |
| 1986 ❄️ | 43.5°C | 20.9°C | 32.2°C | 41 mm | 33% | 2.3 m/s | 7.1 |
| 1985 | 46.8°C | 24.7°C | 35.7°C | 7 mm | 24% | 2.1 m/s | 7.5 |
| 1984 | 47.5°C | 22.2°C | 34.9°C | 3 mm | 27% | 3.1 m/s | 7.1 |
| 1983 | 45.7°C | 25.2°C | 35.4°C | 7 mm | 25% | 2.1 m/s | — |
| 1982 | 45.3°C | 20.5°C | 32.9°C | 37 mm | 30% | 2.1 m/s | — |
| 1981 | 45.9°C | 24.7°C | 35.3°C | 51 mm | 36% | 2.6 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 46°C with lows near 23.9°C (mean 35°C), based on 45 years of NASA POWER data.
May averages 42 mm of rainfall in Patna, one of the drier months. The wettest on record was 227 mm in 2021.
The hottest May reached 48.6°C in 1998. The coldest dipped to 20.5°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have fallen by about 0.4°C. Daytime highs moved from 46.2°C to 44.9°C and overnight lows from 23.5°C to 23.9°C over the same span.
May is one of the warmer months of the year in Patna and one of the drier months, so plan for around 46°C daytime highs and 23.9°C at night.
Not quite — May is the 11th coolest month in Patna, averaging 35°C.
For May in Patna, pack light, breathable clothing and sun protection, with typical highs of 46°C and lows of 23.9°C.
Relative humidity in May averages 32% — relatively dry.
Average wind speed in May is 2.4 m/s. The windiest May on record averaged 3.5 m/s (1989).
The wettest May on record was 2021 with 227 mm. On average, May sees 42 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 Patna 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.
