May is one of the warmer months of the year in Katihar, with average highs near 39.1°C and lows around 26.4°C (mean 32.8°C). It is a relatively wet time of year, averaging 103 mm of rainfall and 48% relative humidity across the period.
May is one of the warmer months of the year in Katihar. Across 45 years of records, the warmest May in Katihar was 1991 — when the month averaged 35.1°C — while the coldest was 2020 at 30.5°C. Typical May days reach 39.1°C with nights near 26.4°C. The long-term trend is cooling, about 0.3°C per decade.
May is a relatively wet time of year in Katihar, averaging 103 mm of rainfall. The wettest May on record was 2021 with 325 mm, while the driest was 1995 at 20 mm.
Relative humidity in Katihar during May averages 48%. The most humid May was 2018 at 63%, and the least humid was 1997 at 34%.
May receives about 6 kWh/m²/day of solar energy in Katihar. The sunniest May was 1988 at 7.1 kWh/m²/day, and the cloudiest was 2021 at 4.6.
Average wind speed in Katihar during May is 2.3 m/s. The windiest May was 1989 at 3.1 m/s, while the calmest was 1982 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 | 33.8°C | 32.4°C | 32.7°C | 31.7°C | -1°C |
| Avg High | 39.5°C | 40.7°C | 38.5°C | 39.0°C | 37.4°C | -2.1°C |
| Avg Low | 25.9°C | 26.9°C | 26.4°C | 26.5°C | 25.9°C | 0°C |
| Avg Rain | 88 mm | 58 mm | 99 mm | 126 mm | 165 mm | +77 mm |
May temperatures in Katihar have fallen by about 0.7°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 18.8°C (1986) to a record high of 46.1°C (1991).
Rainfall in May is a relatively wet time of year, averaging 103 mm, with a wettest year of 325 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.5°C per decade while lows rose 0°C per decade, narrowing the gap between day and night.
A quieter season to visit Katihar
If your dates are flexible, the more temperate months of November and February tend to be the most comfortable for visiting Katihar. That said, May — with days averaging 39.1°C and nights around 26.4°C (mean 32.8°C) and higher rainfall (103 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 | 37.3°C | 31.6°C | 25.8°C | 42.0°C | 22.6°C | 111 mm | 57% | 2.4 m/s | 5.2 |
| 2024 | 38.7°C | 32.7°C | 26.6°C | 44.7°C | 22.7°C | 164 mm | 48% | 2.7 m/s | 5.3 |
| 2023 | 39.6°C | 32.8°C | 26.0°C | 43.3°C | 23.9°C | 57 mm | 42% | 2 m/s | 6 |
| 2022 | 37.1°C | 31.7°C | 26.3°C | 41.6°C | 24.1°C | 174 mm | 59% | 2 m/s | 5.3 |
| 2021 🌧️ | 35.8°C | 30.7°C | 25.7°C | 40.7°C | 23.5°C | 325 mm | 59% | 2.3 m/s | 4.6 |
| 2020 ❄️ | 36.2°C | 30.5°C | 24.8°C | 41.8°C | 22.3°C | 160 mm | 61% | 2.1 m/s | 5.2 |
| 2019 | 41.3°C | 33.9°C | 26.5°C | 44.1°C | 21.5°C | 65 mm | 44% | 2.5 m/s | 6 |
| 2018 | 36.6°C | 31.0°C | 25.4°C | 41.7°C | 22.8°C | 109 mm | 63% | 2.6 m/s | 5.4 |
| 2017 | 38.2°C | 32.4°C | 26.5°C | 41.7°C | 23.7°C | 142 mm | 58% | 2.3 m/s | 5.6 |
| 2016 | 38.7°C | 32.8°C | 27.0°C | 43.6°C | 24.8°C | 168 mm | 51% | 2 m/s | 5.4 |
| 2015 | 40.0°C | 33.4°C | 26.8°C | 44.3°C | 23.8°C | 85 mm | 48% | 2.1 m/s | 5.7 |
| 2014 | 39.8°C | 33.4°C | 27.1°C | 44.7°C | 23.3°C | 178 mm | 44% | 2.6 m/s | 6.1 |
| 2013 | 37.8°C | 31.7°C | 25.6°C | 43.3°C | 22.9°C | 173 mm | 52% | 2 m/s | 5.2 |
| 2012 | 41.3°C | 34.5°C | 27.6°C | 45.5°C | 23.8°C | 46 mm | 38% | 2.3 m/s | 6.3 |
| 2011 | 37.4°C | 31.7°C | 25.9°C | 40.6°C | 22.8°C | 155 mm | 58% | 2.1 m/s | 5.8 |
| 2010 | 38.4°C | 32.5°C | 26.5°C | 44.3°C | 24.2°C | 137 mm | 54% | 2.3 m/s | 5.7 |
| 2009 | 37.7°C | 31.8°C | 25.9°C | 43.4°C | 23.8°C | 98 mm | 53% | 2.6 m/s | 5.6 |
| 2008 | 38.3°C | 32.6°C | 26.9°C | 41.9°C | 24.7°C | 96 mm | 50% | 2 m/s | 6 |
| 2007 | 38.4°C | 32.5°C | 26.7°C | 41.9°C | 23.6°C | 132 mm | 50% | 1.8 m/s | 6.5 |
| 2006 | 38.1°C | 32.5°C | 26.9°C | 41.6°C | 23.8°C | 120 mm | 53% | 2.4 m/s | 5.8 |
| 2005 | 39.5°C | 33.0°C | 26.5°C | 44.2°C | 21.8°C | 63 mm | 45% | 2.2 m/s | 5.9 |
| 2004 | 39.9°C | 33.1°C | 26.4°C | 43.3°C | 20.2°C | 64 mm | 46% | 2.2 m/s | 6 |
| 2003 | 39.0°C | 32.2°C | 25.5°C | 42.6°C | 22.3°C | 109 mm | 45% | 2.1 m/s | 6.3 |
| 2002 | 37.8°C | 31.8°C | 25.8°C | 44.2°C | 21.6°C | 88 mm | 56% | 2.9 m/s | 5.7 |
| 2001 | 38.5°C | 32.7°C | 26.9°C | 41.0°C | 23.9°C | 95 mm | 54% | 2.6 m/s | 6 |
| 2000 | 37.6°C | 32.0°C | 26.3°C | 41.5°C | 23.7°C | 125 mm | 60% | 2.5 m/s | 5.3 |
| 1999 | 38.0°C | 32.4°C | 26.8°C | 43.0°C | 23.8°C | 153 mm | 55% | 2.2 m/s | 5.7 |
| 1998 | 39.8°C | 33.4°C | 27.0°C | 45.1°C | 24.0°C | 62 mm | 48% | 2.5 m/s | 6.4 |
| 1997 | 41.2°C | 33.5°C | 25.7°C | 44.6°C | 20.5°C | 53 mm | 34% | 2.3 m/s | 6.4 |
| 1996 | 42.3°C | 34.7°C | 27.2°C | 45.1°C | 22.5°C | 48 mm | 35% | 2.1 m/s | 6.5 |
| 1995 | 42.1°C | 34.8°C | 27.5°C | 45.9°C | 25.3°C | 20 mm | 34% | 2.4 m/s | 6.5 |
| 1994 | 41.5°C | 34.4°C | 27.3°C | 45.1°C | 22.3°C | 38 mm | 35% | 2.3 m/s | 6.9 |
| 1993 | 40.9°C | 34.2°C | 27.4°C | 45.4°C | 25.1°C | 34 mm | 42% | 2.3 m/s | 6.6 |
| 1992 | 39.0°C | 32.2°C | 25.3°C | 44.0°C | 21.8°C | 69 mm | 43% | 2.2 m/s | 6.4 |
| 1991 🔥 | 42.5°C | 35.1°C | 27.6°C | 46.1°C | 24.4°C | 34 mm | 35% | 2.4 m/s | 5.9 |
| 1990 | 39.3°C | 33.3°C | 27.3°C | 42.2°C | 24.3°C | 70 mm | 47% | 2.4 m/s | 6.3 |
| 1989 | 40.3°C | 33.4°C | 26.5°C | 45.8°C | 22.2°C | 66 mm | 40% | 3.1 m/s | 6.4 |
| 1988 | 40.6°C | 33.8°C | 27.0°C | 45.8°C | 23.9°C | 58 mm | 44% | 2.4 m/s | 7.1 |
| 1987 | 39.9°C | 32.4°C | 25.0°C | 43.5°C | 21.1°C | 72 mm | 39% | 1.8 m/s | 7 |
| 1986 | 38.6°C | 31.6°C | 24.6°C | 41.2°C | 18.8°C | 89 mm | 44% | 2 m/s | 6.2 |
| 1985 | 40.7°C | 33.8°C | 26.9°C | 43.9°C | 23.5°C | 55 mm | 40% | 2.2 m/s | 7 |
| 1984 | 38.9°C | 32.2°C | 25.5°C | 44.7°C | 21.4°C | 118 mm | 50% | 2.8 m/s | 6.2 |
| 1983 | 39.4°C | 32.7°C | 26.1°C | 43.5°C | 22.9°C | 65 mm | 45% | 2 m/s | — |
| 1982 | 40.2°C | 33.0°C | 25.8°C | 43.6°C | 21.9°C | 48 mm | 40% | 1.7 m/s | — |
| 1981 | 36.9°C | 31.2°C | 25.6°C | 41.1°C | 23.7°C | 222 mm | 60% | 2.2 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 39.1°C with lows near 26.4°C (mean 32.8°C), based on 45 years of NASA POWER data.
May averages 103 mm of rainfall in Katihar, a relatively wet time of year. The wettest on record was 325 mm in 2021.
The hottest May reached 46.1°C in 1991. The coldest dipped to 18.8°C in 1986.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have fallen by about 0.7°C — but days and nights have moved in opposite directions. Overnight lows rose from 26°C to 26.1°C while daytime highs eased from 39.2°C to 37.7°C, narrowing the gap between day and night.
May is one of the warmer months of the year in Katihar and a relatively wet time of year, so plan for around 39.1°C daytime highs and 26.4°C at night.
Not quite — May is the 12th coolest month in Katihar, averaging 32.8°C.
For May in Katihar, pack light, breathable clothing and sun protection, with typical highs of 39.1°C and lows of 26.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 48% — relatively dry.
Average wind speed in May is 2.3 m/s. The windiest May on record averaged 3.1 m/s (1989).
The wettest May on record was 2021 with 325 mm. On average, May sees 103 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 Katihar 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.
