May is one of the warmer months of the year in Jackson, with average highs near 25.3°C and lows around 14.6°C (mean 20°C). It is a relatively wet time of year, averaging 139 mm of rainfall and 80% relative humidity across the period.
May is one of the warmer months of the year in Jackson. Across 45 years of records, the warmest May in Jackson was 2018 — when the month averaged 23.1°C — while the coldest was 1997 at 17.6°C. Typical May days reach 25.3°C with nights near 14.6°C. The long-term trend is warming, about 0.3°C per decade.
May is a relatively wet time of year in Jackson, averaging 139 mm of rainfall. The wettest May on record was 2010 with 339 mm, while the driest was 2005 at 13 mm.
Relative humidity in Jackson during May averages 80%. The most humid May was 1991 at 87%, and the least humid was 2007 at 68%.
May receives about 5.8 kWh/m²/day of solar energy in Jackson. The sunniest May was 2005 at 6.9 kWh/m²/day, and the cloudiest was 1991 at 4.7.
Average wind speed in Jackson during May is 1.6 m/s. The windiest Mays were 1983 and 2000 at 1.9 m/s, while the calmest was 1987 at 1.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 19.3°C | 19.6°C | 20.1°C | 20.5°C | 20.1°C | +0.8°C |
| Avg High | 24.9°C | 24.9°C | 25.6°C | 25.7°C | 25.2°C | +0.3°C |
| Avg Low | 13.7°C | 14.3°C | 14.5°C | 15.4°C | 15.0°C | +1.3°C |
| Avg Rain | 143 mm | 134 mm | 132 mm | 147 mm | 143 mm | +0 mm |
May temperatures in Jackson have risen by about 1.7°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 3.1°C (2013) to a record high of 33.9°C (2012).
Rainfall in May is a relatively wet time of year, averaging 139 mm, with a wettest year of 339 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.2°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 Jackson
May is one of the best times to visit Jackson. Expect days averaging 25.3°C and nights around 14.6°C (mean 20°C) — warmer than Jackson's yearly average — with higher rainfall (139 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 | 24.5°C | 19.9°C | 15.4°C | 28.7°C | 8.0°C | 167 mm | 84% | 1.5 m/s | 4.8 |
| 2024 | 26.9°C | 22.2°C | 17.5°C | 30.2°C | 11.7°C | 181 mm | 82% | 1.4 m/s | 5.6 |
| 2023 | 25.4°C | 20.2°C | 15.0°C | 29.4°C | 4.8°C | 115 mm | 80% | 1.4 m/s | 5.9 |
| 2022 | 26.3°C | 21.0°C | 15.8°C | 30.3°C | 8.7°C | 124 mm | 82% | 1.7 m/s | 5.8 |
| 2021 | 24.3°C | 18.7°C | 13.0°C | 30.7°C | 6.3°C | 138 mm | 79% | 1.6 m/s | 5.9 |
| 2020 | 23.6°C | 18.5°C | 13.4°C | 29.1°C | 3.6°C | 133 mm | 82% | 1.6 m/s | 5.7 |
| 2019 | 26.8°C | 21.7°C | 16.7°C | 31.3°C | 7.7°C | 83 mm | 82% | 1.6 m/s | 5.9 |
| 2018 🔥 | 28.0°C | 23.1°C | 18.3°C | 31.1°C | 8.9°C | 156 mm | 83% | 1.3 m/s | 5.9 |
| 2017 | 25.4°C | 19.7°C | 14.0°C | 29.8°C | 5.7°C | 118 mm | 77% | 1.7 m/s | 6.3 |
| 2016 | 24.2°C | 19.1°C | 13.9°C | 29.2°C | 6.3°C | 103 mm | 79% | 1.6 m/s | 6 |
| 2015 | 25.1°C | 20.1°C | 15.2°C | 28.7°C | 5.8°C | 149 mm | 83% | 1.5 m/s | 5.5 |
| 2014 | 25.4°C | 20.2°C | 14.9°C | 30.3°C | 5.4°C | 76 mm | 80% | 1.6 m/s | 6.3 |
| 2013 | 23.7°C | 18.7°C | 13.8°C | 28.5°C | 3.1°C | 208 mm | 83% | 1.6 m/s | 5.9 |
| 2012 | 28.2°C | 22.3°C | 16.5°C | 33.9°C | 10.5°C | 60 mm | 74% | 1.3 m/s | 6.4 |
| 2011 | 23.9°C | 18.8°C | 13.7°C | 30.6°C | 4.5°C | 174 mm | 84% | 1.7 m/s | 5.7 |
| 2010 🌧️ | 26.1°C | 21.3°C | 16.5°C | 31.0°C | 7.2°C | 339 mm | 84% | 1.5 m/s | 5.7 |
| 2009 | 24.3°C | 19.5°C | 14.7°C | 30.3°C | 6.1°C | 204 mm | 85% | 1.6 m/s | 5.1 |
| 2008 | 25.0°C | 19.5°C | 14.0°C | 31.3°C | 6.2°C | 215 mm | 81% | 1.8 m/s | 5.7 |
| 2007 | 28.4°C | 22.1°C | 15.8°C | 32.0°C | 6.9°C | 41 mm | 68% | 1.3 m/s | 6.5 |
| 2006 | 25.4°C | 20.0°C | 14.7°C | 31.7°C | 6.4°C | 106 mm | 80% | 1.5 m/s | 5.8 |
| 2005 | 24.6°C | 18.5°C | 12.4°C | 30.3°C | 4.3°C | 13 mm | 75% | 1.3 m/s | 6.9 |
| 2004 | 26.0°C | 21.2°C | 16.3°C | 30.0°C | 5.4°C | 136 mm | 84% | 1.8 m/s | 5.9 |
| 2003 | 24.9°C | 20.2°C | 15.4°C | 28.6°C | 9.7°C | 253 mm | 84% | 1.8 m/s | 5.3 |
| 2002 | 24.5°C | 18.6°C | 12.8°C | 29.9°C | 4.8°C | 132 mm | 80% | 1.8 m/s | 5.5 |
| 2001 | 26.0°C | 20.0°C | 13.9°C | 30.5°C | 8.4°C | 123 mm | 75% | 1.5 m/s | 6.1 |
| 2000 | 26.7°C | 21.0°C | 15.4°C | 32.0°C | 7.8°C | 97 mm | 76% | 1.9 m/s | 5.8 |
| 1999 | 25.0°C | 19.4°C | 13.7°C | 28.3°C | 8.5°C | 114 mm | 79% | 1.6 m/s | 6.2 |
| 1998 | 26.8°C | 21.4°C | 16.0°C | 31.4°C | 8.6°C | 130 mm | 81% | 1.5 m/s | 6.2 |
| 1997 ❄️ | 23.3°C | 17.6°C | 11.9°C | 28.7°C | 6.0°C | 138 mm | 78% | 1.8 m/s | 6.2 |
| 1996 | 26.5°C | 21.4°C | 16.3°C | 32.6°C | 6.7°C | 108 mm | 81% | 1.7 m/s | 6 |
| 1995 | 25.5°C | 20.3°C | 15.1°C | 30.1°C | 4.8°C | 133 mm | 79% | 1.7 m/s | 5.4 |
| 1994 | 23.8°C | 18.0°C | 12.3°C | 28.8°C | 3.6°C | 107 mm | 78% | 1.6 m/s | 6.2 |
| 1993 | 24.3°C | 19.2°C | 14.0°C | 28.7°C | 8.8°C | 135 mm | 81% | 1.5 m/s | 5.5 |
| 1992 | 24.4°C | 18.7°C | 13.1°C | 29.5°C | 4.0°C | 54 mm | 76% | 1.5 m/s | 6.1 |
| 1991 | 26.0°C | 21.9°C | 17.7°C | 29.7°C | 8.4°C | 296 mm | 87% | 1.3 m/s | 4.7 |
| 1990 | 23.3°C | 18.2°C | 13.0°C | 27.6°C | 7.2°C | 131 mm | 83% | 1.8 m/s | 5.1 |
| 1989 | 23.9°C | 18.3°C | 12.7°C | 30.2°C | 4.0°C | 105 mm | 79% | 1.8 m/s | 5.6 |
| 1988 | 26.0°C | 19.2°C | 12.3°C | 32.8°C | 6.7°C | 78 mm | 70% | 1.5 m/s | 6.5 |
| 1987 | 27.0°C | 22.1°C | 17.2°C | 30.0°C | 11.2°C | 104 mm | 81% | 1.2 m/s | 6 |
| 1986 | 25.8°C | 20.5°C | 15.2°C | 30.6°C | 4.7°C | 130 mm | 74% | 1.4 m/s | 5.2 |
| 1985 | 24.8°C | 19.4°C | 14.0°C | 30.5°C | 7.0°C | 89 mm | 80% | 1.7 m/s | 5.7 |
| 1984 | 23.4°C | 17.7°C | 12.0°C | 28.4°C | 6.2°C | 228 mm | 81% | 1.8 m/s | 5.9 |
| 1983 | 22.8°C | 17.7°C | 12.7°C | 26.0°C | 5.8°C | 291 mm | 83% | 1.9 m/s | — |
| 1982 | 26.2°C | 20.8°C | 15.5°C | 30.1°C | 7.7°C | 114 mm | 81% | 1.4 m/s | — |
| 1981 | 23.9°C | 17.9°C | 11.9°C | 28.5°C | 4.6°C | 146 mm | 77% | 1.7 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 25.3°C with lows near 14.6°C (mean 20°C), based on 45 years of NASA POWER data.
May averages 139 mm of rainfall in Jackson, a relatively wet time of year. The wettest on record was 339 mm in 2010.
The hottest May reached 33.9°C in 2012. The coldest dipped to 3.1°C in 2013.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 1.7°C. Daytime highs moved from 24.2°C to 25.5°C and overnight lows from 13.2°C to 15.3°C over the same span.
May is one of the warmer months of the year in Jackson and a relatively wet time of year, so plan for around 25.3°C daytime highs and 14.6°C at night.
Not quite — May is the 8th coolest month in Jackson, averaging 20°C.
For May in Jackson, pack light layers you can adjust through the day, with typical highs of 25.3°C and lows of 14.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 80% — quite humid.
Average wind speed in May is 1.6 m/s. The windiest May on record averaged 1.9 m/s (1983).
The wettest May on record was 2010 with 339 mm. On average, May sees 139 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 Jackson 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.
