May is one of the warmer months of the year in Samastipur, with average highs near 41.3°C and lows around 27.1°C (mean 34.2°C). It is one of the drier months, averaging 53 mm of rainfall and 36% relative humidity across the period.
May is one of the warmer months of the year in Samastipur. Across 45 years of records, the warmest May in Samastipur was 1991 — when the month averaged 36.4°C — while the coldest was 2021 at 31.5°C. Typical May days reach 41.3°C with nights near 27.1°C. The long-term trend is cooling, about 0.3°C per decade.
May is one of the drier months in Samastipur, averaging 53 mm of rainfall. The wettest May on record was 2021 with 273 mm, while the driest was 1995 at 2 mm.
Relative humidity in Samastipur during May averages 36%. The most humid May was 2022 at 50%, and the least humid was 1996 at 21%.
May receives about 6.5 kWh/m²/day of solar energy in Samastipur. The sunniest May was 1985 at 7.5 kWh/m²/day, and the cloudiest was 2021 at 4.8.
Average wind speed in Samastipur during May is 2.5 m/s. The windiest May was 1989 at 3.7 m/s, while the calmest was 1982 at 2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 34.1°C | 35.1°C | 34.0°C | 34.4°C | 32.6°C | -1.5°C |
| Avg High | 41.8°C | 42.7°C | 40.6°C | 41.3°C | 38.9°C | -2.9°C |
| Avg Low | 26.4°C | 27.6°C | 27.3°C | 27.4°C | 26.2°C | -0.2°C |
| Avg Rain | 31 mm | 24 mm | 59 mm | 63 mm | 109 mm | +78 mm |
May temperatures in Samastipur have fallen by about 1.7°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 19.5°C (2004) to a record high of 48.1°C (1998).
Rainfall in May is one of the drier months, averaging 53 mm, with a wettest year of 273 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.6°C per decade while lows rose 0°C per decade, narrowing the gap between day and night.
A quieter season to visit Samastipur
If your dates are flexible, the more temperate months of November and February tend to be the most comfortable for visiting Samastipur. That said, May — with days averaging 41.3°C and nights around 27.1°C (mean 34.2°C) and moderate rainfall (53 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 | 38.8°C | 32.7°C | 26.6°C | 43.1°C | 23.5°C | 44 mm | 47% | 2.8 m/s | 5.5 |
| 2024 | 40.0°C | 33.5°C | 27.0°C | 46.3°C | 22.1°C | 89 mm | 41% | 2.8 m/s | 5.9 |
| 2023 | 40.0°C | 32.9°C | 25.8°C | 43.9°C | 22.8°C | 43 mm | 35% | 2.2 m/s | 6.4 |
| 2022 | 38.5°C | 32.5°C | 26.5°C | 42.3°C | 24.1°C | 132 mm | 50% | 2.1 m/s | 5.8 |
| 2021 ❄️ 🌧️ | 37.4°C | 31.5°C | 25.7°C | 42.3°C | 23.0°C | 273 mm | 50% | 2.6 m/s | 4.8 |
| 2020 | 38.9°C | 32.3°C | 25.7°C | 45.9°C | 22.6°C | 73 mm | 46% | 2.3 m/s | 6.1 |
| 2019 | 43.5°C | 35.5°C | 27.5°C | 46.2°C | 21.9°C | 18 mm | 28% | 2.8 m/s | 6.7 |
| 2018 | 39.8°C | 33.3°C | 26.8°C | 44.2°C | 24.0°C | 34 mm | 46% | 2.8 m/s | 6 |
| 2017 | 40.6°C | 34.2°C | 27.8°C | 44.0°C | 24.5°C | 108 mm | 43% | 2.4 m/s | 6.1 |
| 2016 | 40.6°C | 34.1°C | 27.6°C | 44.8°C | 25.7°C | 99 mm | 39% | 2.2 m/s | 5.9 |
| 2015 | 42.3°C | 35.1°C | 27.8°C | 46.1°C | 24.9°C | 32 mm | 32% | 2.1 m/s | 6.4 |
| 2014 | 41.6°C | 34.6°C | 27.6°C | 45.5°C | 23.6°C | 82 mm | 33% | 3 m/s | 6.5 |
| 2013 | 40.6°C | 33.1°C | 25.6°C | 44.7°C | 23.2°C | 96 mm | 33% | 2.2 m/s | 6.1 |
| 2012 | 43.3°C | 35.9°C | 28.4°C | 46.8°C | 24.1°C | 8 mm | 25% | 2.3 m/s | 6.8 |
| 2011 | 40.1°C | 33.6°C | 27.0°C | 43.7°C | 24.5°C | 78 mm | 44% | 2.4 m/s | 6.3 |
| 2010 | 41.0°C | 34.4°C | 27.8°C | 45.4°C | 25.1°C | 73 mm | 40% | 2.6 m/s | 6.3 |
| 2009 | 40.1°C | 33.6°C | 27.2°C | 45.0°C | 24.0°C | 55 mm | 41% | 3.1 m/s | 6.1 |
| 2008 | 40.2°C | 33.8°C | 27.5°C | 42.6°C | 25.2°C | 80 mm | 40% | 2.1 m/s | 6.3 |
| 2007 | 40.2°C | 33.6°C | 27.0°C | 43.8°C | 24.7°C | 65 mm | 41% | 2.4 m/s | 6.7 |
| 2006 | 40.3°C | 34.3°C | 28.3°C | 43.7°C | 25.8°C | 49 mm | 43% | 2.5 m/s | 6.1 |
| 2005 | 41.7°C | 34.2°C | 26.6°C | 45.7°C | 22.2°C | 17 mm | 32% | 2.3 m/s | 6.8 |
| 2004 | 41.5°C | 34.2°C | 27.0°C | 45.2°C | 19.5°C | 45 mm | 35% | 2.4 m/s | 6.7 |
| 2003 | 41.6°C | 34.1°C | 26.5°C | 45.4°C | 21.1°C | 13 mm | 30% | 2.6 m/s | 6.7 |
| 2002 | 39.1°C | 32.7°C | 26.3°C | 44.0°C | 23.5°C | 129 mm | 49% | 3 m/s | 6.1 |
| 2001 | 41.0°C | 34.8°C | 28.6°C | 44.5°C | 25.0°C | 71 mm | 40% | 2.7 m/s | 6.5 |
| 2000 | 40.6°C | 34.4°C | 28.2°C | 45.3°C | 22.9°C | 68 mm | 43% | 2.4 m/s | 5.9 |
| 1999 | 40.7°C | 34.0°C | 27.4°C | 46.4°C | 22.8°C | 67 mm | 41% | 2.3 m/s | 6.5 |
| 1998 | 42.6°C | 35.3°C | 28.0°C | 48.1°C | 24.0°C | 16 mm | 34% | 2.7 m/s | 6.8 |
| 1997 | 42.9°C | 34.7°C | 26.6°C | 45.7°C | 21.4°C | 28 mm | 22% | 2.5 m/s | 6.6 |
| 1996 | 44.5°C | 36.2°C | 27.8°C | 47.0°C | 24.3°C | 2 mm | 21% | 2.2 m/s | 6.7 |
| 1995 | 43.9°C | 35.9°C | 28.0°C | 46.3°C | 24.7°C | 2 mm | 23% | 2.7 m/s | 7 |
| 1994 | 42.7°C | 35.2°C | 27.7°C | 45.5°C | 22.7°C | 32 mm | 28% | 2.4 m/s | 6.7 |
| 1993 | 42.3°C | 34.8°C | 27.4°C | 47.2°C | 25.1°C | 21 mm | 30% | 2.4 m/s | 7.3 |
| 1992 | 41.2°C | 33.5°C | 25.9°C | 45.7°C | 21.9°C | 47 mm | 30% | 2.6 m/s | 6.8 |
| 1991 🔥 | 44.4°C | 36.4°C | 28.5°C | 47.0°C | 24.4°C | 8 mm | 23% | 2.7 m/s | 6.9 |
| 1990 | 42.0°C | 35.4°C | 28.8°C | 45.3°C | 25.4°C | 16 mm | 33% | 2.4 m/s | 6.5 |
| 1989 | 42.0°C | 34.5°C | 27.0°C | 46.1°C | 20.5°C | 37 mm | 32% | 3.7 m/s | 7.2 |
| 1988 | 42.6°C | 34.8°C | 26.9°C | 47.1°C | 23.1°C | 24 mm | 34% | 2.8 m/s | 7.1 |
| 1987 | 41.6°C | 33.8°C | 25.9°C | 45.9°C | 20.5°C | 17 mm | 28% | 2.3 m/s | 6.9 |
| 1986 | 39.9°C | 32.4°C | 24.8°C | 42.7°C | 20.1°C | 45 mm | 35% | 2.4 m/s | 7.1 |
| 1985 | 42.8°C | 35.0°C | 27.2°C | 45.8°C | 23.8°C | 14 mm | 28% | 2.4 m/s | 7.5 |
| 1984 | 42.6°C | 34.5°C | 26.4°C | 47.1°C | 22.3°C | 12 mm | 34% | 3.4 m/s | 7.1 |
| 1983 | 42.0°C | 34.4°C | 26.8°C | 45.1°C | 23.3°C | 9 mm | 29% | 2.2 m/s | — |
| 1982 | 41.5°C | 33.7°C | 25.9°C | 44.6°C | 20.1°C | 45 mm | 31% | 2 m/s | — |
| 1981 | 40.8°C | 33.9°C | 26.9°C | 43.7°C | 24.5°C | 77 mm | 41% | 2.6 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 41.3°C with lows near 27.1°C (mean 34.2°C), based on 45 years of NASA POWER data.
May averages 53 mm of rainfall in Samastipur, one of the drier months. The wettest on record was 273 mm in 2021.
The hottest May reached 48.1°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 1.7°C. Daytime highs moved from 41.9°C to 38.9°C and overnight lows from 26.6°C to 26.3°C over the same span.
May is one of the warmer months of the year in Samastipur and one of the drier months, so plan for around 41.3°C daytime highs and 27.1°C at night.
Not quite — May is the 11th coolest month in Samastipur, averaging 34.2°C.
For May in Samastipur, pack light, breathable clothing and sun protection, with typical highs of 41.3°C and lows of 27.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 36% — relatively dry.
Average wind speed in May is 2.5 m/s. The windiest May on record averaged 3.7 m/s (1989).
The wettest May on record was 2021 with 273 mm. On average, May sees 53 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 Samastipur 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.
