May is one of the warmer months of the year in Supaul, with average highs near 39.5°C and lows around 26.2°C (mean 32.9°C). It is about average for rainfall, averaging 86 mm of rainfall and 44% relative humidity across the period.
May is one of the warmer months of the year in Supaul. Across 45 years of records, the warmest May in Supaul was 1991 — when the month averaged 35.3°C — while the coldest was 2021 at 30.3°C. Typical May days reach 39.5°C with nights near 26.2°C. The long-term trend is cooling, about 0.3°C per decade.
May is about average for rainfall in Supaul, averaging 86 mm of rainfall. The wettest May on record was 2021 with 315 mm, while the driest was 1995 at 14 mm.
Relative humidity in Supaul during May averages 44%. The most humid May was 2021 at 59%, and the least humid was 1997 at 27%.
May receives about 6.2 kWh/m²/day of solar energy in Supaul. The sunniest May was 1987 at 7.3 kWh/m²/day, and the cloudiest was 2021 at 4.4.
Average wind speed in Supaul during May is 2.4 m/s. The windiest May was 1989 at 3.3 m/s, while the calmest were 1982 and 2015 at 1.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 32.7°C | 34.1°C | 32.7°C | 32.8°C | 31.4°C | -1.3°C |
| Avg High | 39.8°C | 41.3°C | 39.0°C | 39.3°C | 37.3°C | -2.5°C |
| Avg Low | 25.6°C | 26.9°C | 26.4°C | 26.4°C | 25.5°C | -0.1°C |
| Avg Rain | 70 mm | 37 mm | 74 mm | 111 mm | 170 mm | +101 mm |
May temperatures in Supaul have fallen by about 1°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 19.6°C (1986) to a record high of 46.8°C (1998).
Rainfall in May is about average for rainfall, averaging 86 mm, with a wettest year of 315 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 Supaul
If your dates are flexible, the more temperate months of November and February tend to be the most comfortable for visiting Supaul. That said, May — with days averaging 39.5°C and nights around 26.2°C (mean 32.9°C) and higher rainfall (86 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 | 36.9°C | 31.2°C | 25.5°C | 42.1°C | 22.8°C | 137 mm | 57% | 2.5 m/s | 5.5 |
| 2024 | 38.5°C | 32.5°C | 26.4°C | 44.5°C | 22.0°C | 162 mm | 47% | 2.8 m/s | 5.5 |
| 2023 | 39.1°C | 32.3°C | 25.5°C | 42.9°C | 23.1°C | 81 mm | 41% | 2.1 m/s | 6.2 |
| 2022 | 37.1°C | 31.5°C | 26.0°C | 41.2°C | 23.7°C | 180 mm | 58% | 2.1 m/s | 5.3 |
| 2021 ❄️ 🌧️ | 35.6°C | 30.3°C | 24.9°C | 40.3°C | 21.9°C | 315 mm | 59% | 2.3 m/s | 4.4 |
| 2020 | 36.4°C | 30.5°C | 24.7°C | 42.4°C | 21.9°C | 148 mm | 57% | 2 m/s | 5.5 |
| 2019 | 41.2°C | 33.6°C | 26.0°C | 44.0°C | 20.6°C | 66 mm | 41% | 2.5 m/s | 6.4 |
| 2018 | 37.1°C | 31.3°C | 25.5°C | 41.0°C | 22.9°C | 95 mm | 58% | 2.6 m/s | 5.9 |
| 2017 | 38.4°C | 32.5°C | 26.5°C | 41.9°C | 23.0°C | 144 mm | 54% | 2.3 m/s | 5.8 |
| 2016 | 38.6°C | 32.6°C | 26.7°C | 43.5°C | 25.1°C | 186 mm | 48% | 1.9 m/s | 5.5 |
| 2015 | 39.7°C | 33.1°C | 26.5°C | 43.3°C | 23.6°C | 105 mm | 46% | 1.7 m/s | 6.2 |
| 2014 | 40.4°C | 33.7°C | 27.0°C | 45.0°C | 23.4°C | 122 mm | 39% | 2.7 m/s | 6.3 |
| 2013 | 38.5°C | 31.8°C | 25.2°C | 43.6°C | 21.7°C | 114 mm | 44% | 2 m/s | 5.8 |
| 2012 | 42.0°C | 34.8°C | 27.7°C | 46.1°C | 22.4°C | 36 mm | 33% | 2.4 m/s | 6.6 |
| 2011 | 38.0°C | 31.9°C | 25.9°C | 41.3°C | 23.3°C | 127 mm | 53% | 2.2 m/s | 5.9 |
| 2010 | 39.1°C | 32.9°C | 26.7°C | 44.7°C | 24.3°C | 114 mm | 49% | 2.4 m/s | 6.2 |
| 2009 | 38.4°C | 32.3°C | 26.1°C | 44.1°C | 23.6°C | 74 mm | 48% | 3 m/s | 5.9 |
| 2008 | 38.9°C | 32.9°C | 27.0°C | 42.2°C | 24.8°C | 75 mm | 45% | 2 m/s | 6 |
| 2007 | 38.4°C | 32.3°C | 26.1°C | 42.3°C | 23.0°C | 134 mm | 49% | 1.9 m/s | 6.7 |
| 2006 | 38.9°C | 33.0°C | 27.2°C | 42.4°C | 23.5°C | 72 mm | 48% | 2.5 m/s | 6 |
| 2005 | 39.5°C | 32.7°C | 25.9°C | 44.8°C | 22.0°C | 55 mm | 42% | 2.2 m/s | 6.3 |
| 2004 | 40.1°C | 33.2°C | 26.3°C | 43.9°C | 19.8°C | 59 mm | 42% | 2.2 m/s | 6.1 |
| 2003 | 39.3°C | 32.4°C | 25.4°C | 42.7°C | 22.0°C | 74 mm | 41% | 2.3 m/s | 6.4 |
| 2002 | 38.0°C | 31.9°C | 25.8°C | 44.1°C | 22.5°C | 93 mm | 53% | 3 m/s | 5.7 |
| 2001 | 39.9°C | 33.8°C | 27.7°C | 42.8°C | 23.7°C | 49 mm | 46% | 2.7 m/s | 5.9 |
| 2000 | 38.8°C | 32.7°C | 26.7°C | 42.9°C | 22.7°C | 58 mm | 53% | 2.6 m/s | 5.7 |
| 1999 | 38.9°C | 32.9°C | 26.9°C | 44.2°C | 22.9°C | 91 mm | 48% | 2.4 m/s | 6.2 |
| 1998 | 40.8°C | 34.0°C | 27.2°C | 46.8°C | 23.4°C | 27 mm | 42% | 2.7 m/s | 6.2 |
| 1997 | 42.0°C | 33.9°C | 25.8°C | 44.9°C | 20.6°C | 28 mm | 27% | 2.5 m/s | 6.6 |
| 1996 | 42.8°C | 34.8°C | 26.9°C | 44.9°C | 23.0°C | 31 mm | 30% | 2.1 m/s | 6.4 |
| 1995 | 42.9°C | 35.2°C | 27.6°C | 46.1°C | 24.8°C | 14 mm | 29% | 2.5 m/s | 7.1 |
| 1994 | 41.8°C | 34.5°C | 27.3°C | 45.1°C | 22.7°C | 33 mm | 32% | 2.4 m/s | 6.9 |
| 1993 | 41.2°C | 34.2°C | 27.2°C | 45.8°C | 24.2°C | 23 mm | 36% | 2.3 m/s | 6.7 |
| 1992 | 39.5°C | 32.2°C | 25.0°C | 44.1°C | 21.3°C | 62 mm | 38% | 2.5 m/s | 6.6 |
| 1991 🔥 | 42.9°C | 35.3°C | 27.7°C | 46.4°C | 23.9°C | 16 mm | 30% | 2.7 m/s | 6.7 |
| 1990 | 40.0°C | 33.7°C | 27.4°C | 42.9°C | 23.8°C | 47 mm | 42% | 2.4 m/s | 6.2 |
| 1989 | 40.6°C | 33.5°C | 26.4°C | 46.2°C | 20.8°C | 63 mm | 37% | 3.3 m/s | 6.7 |
| 1988 | 40.7°C | 33.6°C | 26.6°C | 46.2°C | 23.3°C | 49 mm | 41% | 2.6 m/s | 6.9 |
| 1987 | 40.5°C | 32.8°C | 25.1°C | 44.7°C | 20.9°C | 33 mm | 33% | 2.1 m/s | 7.3 |
| 1986 | 38.8°C | 31.5°C | 24.3°C | 41.5°C | 19.6°C | 83 mm | 40% | 2.2 m/s | 6.8 |
| 1985 | 40.6°C | 33.5°C | 26.4°C | 43.7°C | 22.5°C | 54 mm | 37% | 2.3 m/s | 7.1 |
| 1984 | 39.4°C | 32.4°C | 25.5°C | 45.6°C | 22.4°C | 82 mm | 45% | 3.1 m/s | 6.2 |
| 1983 | 39.6°C | 32.5°C | 25.5°C | 43.2°C | 22.4°C | 50 mm | 41% | 2.2 m/s | — |
| 1982 | 40.6°C | 32.9°C | 25.3°C | 43.5°C | 21.6°C | 43 mm | 37% | 1.7 m/s | — |
| 1981 | 37.8°C | 31.7°C | 25.6°C | 40.3°C | 23.7°C | 170 mm | 55% | 2.3 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 39.5°C with lows near 26.2°C (mean 32.9°C), based on 45 years of NASA POWER data.
May averages 86 mm of rainfall in Supaul, about average for rainfall. The wettest on record was 315 mm in 2021.
The hottest May reached 46.8°C in 1998. 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 1°C. Daytime highs moved from 39.6°C to 37.4°C and overnight lows from 25.7°C to 25.7°C over the same span.
May is one of the warmer months of the year in Supaul and about average for rainfall, so plan for around 39.5°C daytime highs and 26.2°C at night.
Not quite — May is the 12th coolest month in Supaul, averaging 32.9°C.
For May in Supaul, pack light, breathable clothing and sun protection, with typical highs of 39.5°C and lows of 26.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 44% — relatively dry.
Average wind speed in May is 2.4 m/s. The windiest May on record averaged 3.3 m/s (1989).
The wettest May on record was 2021 with 315 mm. On average, May sees 86 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 Supaul 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.
