May is one of the warmer months of the year in Benton, with average highs near 27.1°C and lows around 15.6°C (mean 21.4°C). It is a relatively wet time of year, averaging 141 mm of rainfall and 79% relative humidity across the period.
May is one of the warmer months of the year in Benton. Across 45 years of records, the warmest Mays in Benton were 1996 and 1998 — when the month averaged 24.6°C — while the coldest was 1997 at 19°C. Typical May days reach 27.1°C with nights near 15.6°C. The long-term trend is warming, about 0.2°C per decade.
May is a relatively wet time of year in Benton, averaging 141 mm of rainfall. The wettest May on record was 2009 with 341 mm, while the driest was 2012 at 35 mm.
Relative humidity in Benton during May averages 79%. The most humid Mays were 1991 and 2009 at 85%, and the least humid was 1988 at 66%.
May receives about 5.7 kWh/m²/day of solar energy in Benton. The sunniest May was 2012 at 6.5 kWh/m²/day, and the cloudiest were 1990 and 2009 at 4.9.
Average wind speed in Benton during May is 0.4 m/s. The windiest Mays were 2013, 2014 and 2021, among others at 0.5 m/s, while the calmest was 1987 at 0.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 20.9°C | 21.3°C | 21.5°C | 21.7°C | 21.5°C | +0.6°C |
| Avg High | 26.9°C | 27.2°C | 27.2°C | 27.3°C | 26.9°C | 0°C |
| Avg Low | 14.9°C | 15.4°C | 15.8°C | 16.1°C | 16.1°C | +1.2°C |
| Avg Rain | 134 mm | 109 mm | 148 mm | 148 mm | 180 mm | +46 mm |
May temperatures in Benton have risen by about 1.6°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 1.9°C (2013) to a record high of 38.6°C (1998).
Rainfall in May is a relatively wet time of year, averaging 141 mm, with a wettest year of 341 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.1°C per decade while lows rose 0.4°C per decade, narrowing the gap between day and night.
One of the best times to visit Benton
May is one of the best times to visit Benton. Expect days averaging 27.1°C and nights around 15.6°C (mean 21.4°C) — warmer than Benton's yearly average — with higher rainfall (141 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 26.4°C | 21.2°C | 16.0°C | 32.5°C | 8.1°C | 215 mm | 82% | 0.4 m/s | 5.1 |
| 2024 | 29.0°C | 23.8°C | 18.5°C | 32.4°C | 13.2°C | 178 mm | 82% | 0.4 m/s | 5.2 |
| 2023 | 27.4°C | 21.9°C | 16.3°C | 33.1°C | 5.4°C | 113 mm | 79% | 0.4 m/s | 6.1 |
| 2022 | 28.1°C | 22.3°C | 16.5°C | 35.4°C | 10.8°C | 166 mm | 81% | 0.4 m/s | 5.8 |
| 2021 | 25.2°C | 19.8°C | 14.4°C | 30.9°C | 7.6°C | 199 mm | 82% | 0.5 m/s | 5.5 |
| 2020 | 25.4°C | 20.0°C | 14.6°C | 31.4°C | 6.7°C | 206 mm | 83% | 0.4 m/s | 5.9 |
| 2019 | 27.6°C | 22.5°C | 17.3°C | 31.8°C | 10.3°C | 254 mm | 83% | 0.4 m/s | 5.7 |
| 2018 | 30.1°C | 24.5°C | 19.0°C | 34.7°C | 13.6°C | 78 mm | 79% | 0.4 m/s | 6.3 |
| 2017 | 26.7°C | 20.7°C | 14.7°C | 31.8°C | 7.4°C | 161 mm | 78% | 0.4 m/s | 6.2 |
| 2016 | 25.9°C | 20.3°C | 14.6°C | 32.0°C | 8.2°C | 77 mm | 80% | 0.4 m/s | 5.5 |
| 2015 | 26.3°C | 21.5°C | 16.7°C | 29.4°C | 7.9°C | 282 mm | 85% | 0.4 m/s | 5.2 |
| 2014 | 25.8°C | 20.4°C | 14.9°C | 31.7°C | 4.4°C | 160 mm | 81% | 0.5 m/s | 5.5 |
| 2013 | 25.7°C | 20.3°C | 15.0°C | 32.2°C | 1.9°C | 127 mm | 80% | 0.5 m/s | 5.5 |
| 2012 | 30.6°C | 24.0°C | 17.3°C | 36.5°C | 11.1°C | 35 mm | 70% | 0.4 m/s | 6.5 |
| 2011 | 25.9°C | 20.0°C | 14.2°C | 33.2°C | 5.7°C | 182 mm | 80% | 0.5 m/s | 5.9 |
| 2010 | 28.8°C | 23.0°C | 17.1°C | 33.9°C | 9.7°C | 126 mm | 78% | 0.4 m/s | 6 |
| 2009 🌧️ | 25.2°C | 20.4°C | 15.6°C | 31.0°C | 6.9°C | 341 mm | 85% | 0.4 m/s | 4.9 |
| 2008 | 26.6°C | 20.9°C | 15.2°C | 32.5°C | 6.6°C | 150 mm | 81% | 0.4 m/s | 5.8 |
| 2007 | 27.3°C | 21.9°C | 16.5°C | 30.9°C | 8.8°C | 97 mm | 79% | 0.4 m/s | 5.7 |
| 2006 | 28.1°C | 22.0°C | 15.9°C | 35.6°C | 9.8°C | 115 mm | 75% | 0.4 m/s | 5.9 |
| 2005 | 28.2°C | 21.3°C | 14.3°C | 36.9°C | 4.2°C | 42 mm | 69% | 0.4 m/s | 6.3 |
| 2004 | 27.6°C | 22.2°C | 16.8°C | 32.1°C | 5.8°C | 132 mm | 80% | 0.4 m/s | 5.4 |
| 2003 | 27.3°C | 22.0°C | 16.6°C | 34.0°C | 10.1°C | 161 mm | 80% | 0.4 m/s | 5.5 |
| 2002 | 25.5°C | 20.0°C | 14.5°C | 30.7°C | 6.7°C | 147 mm | 82% | 0.4 m/s | 5.3 |
| 2001 | 27.4°C | 21.5°C | 15.6°C | 32.5°C | 9.0°C | 139 mm | 78% | 0.4 m/s | 6.3 |
| 2000 | 28.6°C | 22.7°C | 16.9°C | 35.0°C | 8.2°C | 158 mm | 77% | 0.5 m/s | 5.1 |
| 1999 | 26.5°C | 20.5°C | 14.5°C | 32.2°C | 8.9°C | 102 mm | 79% | 0.4 m/s | 6 |
| 1998 | 31.9°C | 24.6°C | 17.2°C | 38.6°C | 7.7°C | 61 mm | 69% | 0.4 m/s | 6.3 |
| 1997 ❄️ | 24.9°C | 19.0°C | 13.1°C | 31.4°C | 5.8°C | 84 mm | 80% | 0.4 m/s | 6.3 |
| 1996 🔥 | 31.4°C | 24.6°C | 17.8°C | 37.3°C | 6.6°C | 127 mm | 70% | 0.4 m/s | 5.9 |
| 1995 | 27.1°C | 21.4°C | 15.8°C | 33.5°C | 6.8°C | 101 mm | 79% | 0.4 m/s | 5.2 |
| 1994 | 26.0°C | 20.0°C | 14.0°C | 30.5°C | 5.4°C | 116 mm | 79% | 0.4 m/s | 6 |
| 1993 | 25.8°C | 20.1°C | 14.4°C | 30.4°C | 9.1°C | 106 mm | 80% | 0.4 m/s | 5.6 |
| 1992 | 26.2°C | 20.4°C | 14.5°C | 31.0°C | 4.9°C | 73 mm | 76% | 0.4 m/s | 5.6 |
| 1991 | 27.3°C | 22.6°C | 18.0°C | 31.7°C | 6.7°C | 112 mm | 85% | 0.4 m/s | 5.3 |
| 1990 | 25.3°C | 19.8°C | 14.4°C | 30.5°C | 7.7°C | 203 mm | 82% | 0.5 m/s | 4.9 |
| 1989 | 25.9°C | 20.4°C | 14.9°C | 32.7°C | 4.4°C | 134 mm | 81% | 0.4 m/s | 5.4 |
| 1988 | 28.9°C | 21.1°C | 13.3°C | 35.6°C | 7.6°C | 38 mm | 66% | 0.4 m/s | 6.1 |
| 1987 | 28.9°C | 23.7°C | 18.5°C | 34.6°C | 11.8°C | 131 mm | 79% | 0.3 m/s | 6.1 |
| 1986 | 27.8°C | 21.8°C | 15.8°C | 33.8°C | 7.9°C | 86 mm | 74% | 0.4 m/s | 5.5 |
| 1985 | 26.5°C | 20.7°C | 14.9°C | 32.9°C | 8.0°C | 62 mm | 80% | 0.4 m/s | 5.8 |
| 1984 | 25.7°C | 19.6°C | 13.4°C | 30.5°C | 6.8°C | 234 mm | 80% | 0.4 m/s | 5.6 |
| 1983 | 24.7°C | 19.1°C | 13.4°C | 29.1°C | 7.1°C | 198 mm | 81% | 0.4 m/s | — |
| 1982 | 27.9°C | 22.2°C | 16.5°C | 33.7°C | 8.2°C | 116 mm | 79% | 0.4 m/s | — |
| 1981 | 25.7°C | 19.6°C | 13.5°C | 31.3°C | 6.9°C | 206 mm | 75% | 0.4 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 27.1°C with lows near 15.6°C (mean 21.4°C), based on 45 years of NASA POWER data.
May averages 141 mm of rainfall in Benton, a relatively wet time of year. The wettest on record was 341 mm in 2009.
The hottest May reached 38.6°C in 1998. The coldest dipped to 1.9°C in 2013.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 1.6°C. Daytime highs moved from 26.1°C to 27.2°C and overnight lows from 14.3°C to 16.3°C over the same span.
May is one of the warmer months of the year in Benton and a relatively wet time of year, so plan for around 27.1°C daytime highs and 15.6°C at night.
Not quite — May is the 8th coolest month in Benton, averaging 21.4°C.
For May in Benton, pack light layers you can adjust through the day, with typical highs of 27.1°C and lows of 15.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 79% — quite humid.
Average wind speed in May is 0.4 m/s. The windiest May on record averaged 0.5 m/s (1990).
The wettest May on record was 2009 with 341 mm. On average, May sees 141 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 Benton 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.
