May is one of the warmer months of the year in Hot Springs National Park, with average highs near 26.4°C and lows around 15.3°C (mean 20.9°C). It is a relatively wet time of year, averaging 150 mm of rainfall and 80% relative humidity across the period.
May is one of the warmer months of the year in Hot Springs National Park. Across 45 years of records, the warmest May in Hot Springs National Park was 2018 — when the month averaged 24°C — while the coldest was 1983 at 18.7°C. Typical May days reach 26.4°C with nights near 15.3°C. The long-term trend is warming, about 0.2°C per decade.
May is a relatively wet time of year in Hot Springs National Park, averaging 150 mm of rainfall. The wettest May on record was 2009 with 368 mm, while the driest was 2012 at 18 mm.
Relative humidity in Hot Springs National Park during May averages 80%. The most humid May was 2009 at 85%, and the least humid was 1988 at 67%.
May receives about 5.6 kWh/m²/day of solar energy in Hot Springs National Park. The sunniest May was 2012 at 6.6 kWh/m²/day, and the cloudiest were 1990 and 2009 at 4.9.
Average wind speed in Hot Springs National Park during May is 0.2 m/s. The windiest Mays were 1982, 1986 and 2014 at 0.3 m/s, while the calmest were 2023, 2024 and 2025, among others at 0.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 20.4°C | 20.7°C | 21.0°C | 21.2°C | 21.0°C | +0.6°C |
| Avg High | 26.2°C | 26.4°C | 26.5°C | 26.6°C | 26.3°C | +0.1°C |
| Avg Low | 14.6°C | 15.0°C | 15.5°C | 15.7°C | 15.8°C | +1.2°C |
| Avg Rain | 138 mm | 138 mm | 150 mm | 159 mm | 174 mm | +36 mm |
May temperatures in Hot Springs National Park have risen by about 1.6°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 2.4°C (2013) to a record high of 37.8°C (1991).
Rainfall in May is a relatively wet time of year, averaging 150 mm, with a wettest year of 368 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 Hot Springs National Park
May is one of the best times to visit Hot Springs National Park. Expect days averaging 26.4°C and nights around 15.3°C (mean 20.9°C) — warmer than Hot Springs National Park's yearly average — with higher rainfall (150 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 | 26.1°C | 20.9°C | 15.7°C | 32.0°C | 7.7°C | 222 mm | 83% | 0.2 m/s | 5.2 |
| 2024 | 28.4°C | 23.3°C | 18.3°C | 32.2°C | 13.9°C | 204 mm | 83% | 0.2 m/s | 5.2 |
| 2023 | 26.9°C | 21.5°C | 16.0°C | 31.7°C | 4.7°C | 92 mm | 80% | 0.2 m/s | 6 |
| 2022 | 27.3°C | 21.7°C | 16.1°C | 34.0°C | 10.3°C | 161 mm | 82% | 0.2 m/s | 5.7 |
| 2021 | 24.5°C | 19.4°C | 14.2°C | 30.0°C | 7.5°C | 173 mm | 83% | 0.2 m/s | 5.1 |
| 2020 | 24.7°C | 19.5°C | 14.4°C | 29.0°C | 6.3°C | 192 mm | 83% | 0.2 m/s | 5.7 |
| 2019 | 27.0°C | 22.0°C | 16.9°C | 31.0°C | 10.4°C | 256 mm | 83% | 0.2 m/s | 5.5 |
| 2018 🔥 | 29.5°C | 24.0°C | 18.4°C | 33.3°C | 13.7°C | 73 mm | 80% | 0.2 m/s | 6.4 |
| 2017 | 26.1°C | 20.1°C | 14.2°C | 32.2°C | 6.8°C | 176 mm | 79% | 0.2 m/s | 6.4 |
| 2016 | 25.1°C | 19.7°C | 14.4°C | 30.3°C | 8.0°C | 83 mm | 81% | 0.2 m/s | 5.3 |
| 2015 | 25.8°C | 21.2°C | 16.5°C | 31.0°C | 8.1°C | 264 mm | 85% | 0.2 m/s | 5 |
| 2014 | 25.1°C | 19.9°C | 14.7°C | 30.4°C | 4.1°C | 189 mm | 82% | 0.3 m/s | 5.6 |
| 2013 | 25.3°C | 19.9°C | 14.4°C | 31.7°C | 2.4°C | 139 mm | 80% | 0.2 m/s | 5.3 |
| 2012 | 29.7°C | 23.3°C | 16.9°C | 35.6°C | 10.6°C | 18 mm | 73% | 0.2 m/s | 6.6 |
| 2011 | 24.9°C | 19.4°C | 13.8°C | 31.0°C | 5.6°C | 233 mm | 82% | 0.2 m/s | 5.8 |
| 2010 | 27.9°C | 22.3°C | 16.7°C | 33.0°C | 9.1°C | 155 mm | 79% | 0.2 m/s | 6 |
| 2009 🌧️ | 24.7°C | 20.0°C | 15.4°C | 30.1°C | 6.6°C | 368 mm | 85% | 0.2 m/s | 4.9 |
| 2008 | 26.0°C | 20.5°C | 15.1°C | 31.3°C | 6.3°C | 132 mm | 82% | 0.2 m/s | 5.6 |
| 2007 | 26.1°C | 21.2°C | 16.2°C | 30.2°C | 8.3°C | 106 mm | 81% | 0.2 m/s | 5.4 |
| 2006 | 27.3°C | 21.4°C | 15.5°C | 34.0°C | 9.4°C | 99 mm | 77% | 0.2 m/s | 6 |
| 2005 | 27.7°C | 20.8°C | 14.0°C | 36.4°C | 4.0°C | 56 mm | 69% | 0.2 m/s | 6 |
| 2004 | 26.9°C | 21.7°C | 16.4°C | 31.1°C | 5.1°C | 130 mm | 81% | 0.2 m/s | 5.4 |
| 2003 | 27.3°C | 21.8°C | 16.4°C | 34.6°C | 9.9°C | 145 mm | 80% | 0.2 m/s | 5.3 |
| 2002 | 24.6°C | 19.6°C | 14.5°C | 30.3°C | 6.2°C | 138 mm | 83% | 0.2 m/s | 5.1 |
| 2001 | 26.6°C | 21.0°C | 15.4°C | 32.3°C | 8.5°C | 168 mm | 80% | 0.2 m/s | 6.3 |
| 2000 | 27.9°C | 22.2°C | 16.5°C | 33.0°C | 7.8°C | 161 mm | 78% | 0.2 m/s | 5.1 |
| 1999 | 25.7°C | 20.0°C | 14.2°C | 30.9°C | 8.5°C | 126 mm | 81% | 0.2 m/s | 5.8 |
| 1998 | 30.1°C | 23.3°C | 16.5°C | 35.5°C | 7.9°C | 98 mm | 74% | 0.2 m/s | 6.2 |
| 1997 | 24.7°C | 18.8°C | 12.9°C | 30.9°C | 5.7°C | 82 mm | 80% | 0.2 m/s | 6 |
| 1996 | 30.0°C | 23.5°C | 17.1°C | 35.0°C | 6.6°C | 159 mm | 74% | 0.2 m/s | 5.4 |
| 1995 | 25.8°C | 20.5°C | 15.2°C | 32.5°C | 6.0°C | 153 mm | 83% | 0.2 m/s | 5.1 |
| 1994 | 25.5°C | 19.6°C | 13.6°C | 35.1°C | 4.7°C | 133 mm | 80% | 0.2 m/s | 6.1 |
| 1993 | 25.1°C | 19.6°C | 14.1°C | 28.9°C | 8.6°C | 119 mm | 82% | 0.2 m/s | 5.3 |
| 1992 | 25.3°C | 19.8°C | 14.4°C | 33.0°C | 4.5°C | 85 mm | 79% | 0.2 m/s | 5.4 |
| 1991 | 27.2°C | 22.5°C | 17.7°C | 37.8°C | 5.9°C | 144 mm | 85% | 0.2 m/s | 5.1 |
| 1990 | 25.0°C | 19.6°C | 14.2°C | 33.2°C | 7.5°C | 284 mm | 83% | 0.2 m/s | 4.9 |
| 1989 | 25.5°C | 20.1°C | 14.7°C | 32.9°C | 4.4°C | 145 mm | 82% | 0.2 m/s | 5.3 |
| 1988 | 28.0°C | 20.5°C | 13.0°C | 34.6°C | 7.8°C | 41 mm | 67% | 0.2 m/s | 6.2 |
| 1987 | 28.4°C | 23.3°C | 18.2°C | 33.5°C | 11.8°C | 147 mm | 79% | 0.2 m/s | 5.9 |
| 1986 | 26.3°C | 20.7°C | 15.2°C | 33.4°C | 7.7°C | 101 mm | 79% | 0.3 m/s | 5.4 |
| 1985 | 25.8°C | 20.2°C | 14.6°C | 32.4°C | 7.7°C | 69 mm | 81% | 0.2 m/s | 5.9 |
| 1984 | 25.3°C | 19.2°C | 13.2°C | 29.8°C | 6.9°C | 220 mm | 80% | 0.2 m/s | 5.8 |
| 1983 ❄️ | 24.3°C | 18.7°C | 13.1°C | 28.9°C | 6.9°C | 212 mm | 82% | 0.2 m/s | — |
| 1982 | 27.4°C | 21.8°C | 16.2°C | 32.5°C | 9.6°C | 109 mm | 78% | 0.3 m/s | — |
| 1981 | 24.8°C | 19.0°C | 13.2°C | 30.7°C | 6.4°C | 195 mm | 78% | 0.2 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 26.4°C with lows near 15.3°C (mean 20.9°C), based on 45 years of NASA POWER data.
May averages 150 mm of rainfall in Hot Springs National Park, a relatively wet time of year. The wettest on record was 368 mm in 2009.
The hottest May reached 37.8°C in 1991. The coldest dipped to 2.4°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 25.5°C to 26.6°C and overnight lows from 14.1°C to 16.1°C over the same span.
May is one of the warmer months of the year in Hot Springs National Park and a relatively wet time of year, so plan for around 26.4°C daytime highs and 15.3°C at night.
Not quite — May is the 8th coolest month in Hot Springs National Park, averaging 20.9°C.
For May in Hot Springs National Park, pack light layers you can adjust through the day, with typical highs of 26.4°C and lows of 15.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 80% — quite humid.
Average wind speed in May is 0.2 m/s. The windiest May on record averaged 0.3 m/s (1982).
The wettest May on record was 2009 with 368 mm. On average, May sees 150 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 Hot Springs National Park 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.
