May is one of the warmer months of the year in Collierville, with average highs near 25.8°C and lows around 15.1°C (mean 20.5°C). It is a relatively wet time of year, averaging 137 mm of rainfall and 79% relative humidity across the period.
May is one of the warmer months of the year in Collierville. Across 45 years of records, the warmest May in Collierville was 2018 — when the month averaged 23.5°C — while the coldest was 1997 at 18.2°C. Typical May days reach 25.8°C with nights near 15.1°C. The long-term trend is warming, about 0.3°C per decade.
May is a relatively wet time of year in Collierville, averaging 137 mm of rainfall. The wettest May on record was 1983 with 277 mm, while the driest was 2005 at 19 mm.
Relative humidity in Collierville during May averages 79%. The most humid May was 1991 at 88%, and the least humid was 2007 at 66%.
May receives about 5.9 kWh/m²/day of solar energy in Collierville. The sunniest May was 2005 at 6.9 kWh/m²/day, and the cloudiest were 1990, 1991 and 2025 at 5.
Average wind speed in Collierville during May is 1.5 m/s. The windiest Mays were 1983 and 2000 at 1.8 m/s, while the calmest was 2018 at 1.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 19.8°C | 20.2°C | 20.6°C | 21.0°C | 20.6°C | +0.8°C |
| Avg High | 25.4°C | 25.5°C | 26.1°C | 26.1°C | 25.6°C | +0.2°C |
| Avg Low | 14.3°C | 14.9°C | 15.1°C | 15.8°C | 15.6°C | +1.3°C |
| Avg Rain | 148 mm | 130 mm | 138 mm | 137 mm | 133 mm | -15 mm |
May temperatures in Collierville have risen by about 1.8°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 2.7°C (2013) to a record high of 34.5°C (2012).
Rainfall in May is a relatively wet time of year, averaging 137 mm, with a wettest year of 277 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 Collierville
May is one of the best times to visit Collierville. Expect days averaging 25.8°C and nights around 15.1°C (mean 20.5°C) — warmer than Collierville's yearly average — with higher rainfall (137 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 | 25.1°C | 20.6°C | 16.0°C | 29.7°C | 8.1°C | 191 mm | 84% | 1.4 m/s | 5 |
| 2024 | 27.4°C | 22.8°C | 18.1°C | 30.4°C | 12.5°C | 175 mm | 82% | 1.4 m/s | 5.5 |
| 2023 | 26.0°C | 20.8°C | 15.6°C | 30.9°C | 4.9°C | 85 mm | 80% | 1.3 m/s | 6.2 |
| 2022 | 26.7°C | 21.5°C | 16.3°C | 31.1°C | 9.4°C | 128 mm | 82% | 1.6 m/s | 5.7 |
| 2021 | 24.6°C | 19.1°C | 13.7°C | 29.8°C | 7.5°C | 116 mm | 79% | 1.6 m/s | 5.9 |
| 2020 | 24.0°C | 19.0°C | 14.0°C | 28.3°C | 4.0°C | 102 mm | 82% | 1.5 m/s | 5.9 |
| 2019 | 27.0°C | 22.0°C | 17.1°C | 31.7°C | 9.1°C | 113 mm | 82% | 1.5 m/s | 5.9 |
| 2018 🔥 | 28.4°C | 23.5°C | 18.7°C | 31.5°C | 9.6°C | 104 mm | 81% | 1.1 m/s | 6 |
| 2017 | 26.2°C | 20.4°C | 14.6°C | 30.7°C | 6.7°C | 113 mm | 74% | 1.6 m/s | 6.4 |
| 2016 | 24.8°C | 19.6°C | 14.4°C | 29.9°C | 7.3°C | 97 mm | 79% | 1.5 m/s | 6 |
| 2015 | 25.5°C | 20.6°C | 15.8°C | 29.2°C | 6.9°C | 165 mm | 83% | 1.4 m/s | 5.5 |
| 2014 | 25.6°C | 20.3°C | 15.1°C | 30.5°C | 6.1°C | 95 mm | 80% | 1.6 m/s | 6.2 |
| 2013 | 24.0°C | 19.1°C | 14.3°C | 28.6°C | 2.7°C | 200 mm | 83% | 1.5 m/s | 5.9 |
| 2012 | 28.7°C | 22.9°C | 17.0°C | 34.5°C | 11.1°C | 71 mm | 73% | 1.2 m/s | 6.5 |
| 2011 | 24.4°C | 19.2°C | 13.9°C | 30.7°C | 5.2°C | 145 mm | 82% | 1.7 m/s | 5.7 |
| 2010 | 26.8°C | 22.0°C | 17.1°C | 31.2°C | 8.2°C | 265 mm | 82% | 1.4 m/s | 5.9 |
| 2009 | 24.8°C | 20.1°C | 15.3°C | 30.3°C | 6.7°C | 219 mm | 85% | 1.5 m/s | 5.3 |
| 2008 | 25.4°C | 20.1°C | 14.8°C | 30.8°C | 6.4°C | 218 mm | 80% | 1.6 m/s | 5.8 |
| 2007 | 28.9°C | 22.5°C | 16.1°C | 32.5°C | 7.7°C | 52 mm | 66% | 1.2 m/s | 6.2 |
| 2006 | 26.1°C | 20.6°C | 15.1°C | 31.8°C | 6.9°C | 102 mm | 79% | 1.4 m/s | 5.8 |
| 2005 | 25.3°C | 19.2°C | 13.0°C | 32.0°C | 4.5°C | 19 mm | 74% | 1.3 m/s | 6.9 |
| 2004 | 26.4°C | 21.6°C | 16.9°C | 30.1°C | 6.0°C | 149 mm | 83% | 1.7 m/s | 5.8 |
| 2003 | 25.5°C | 20.7°C | 15.8°C | 28.9°C | 10.3°C | 256 mm | 83% | 1.6 m/s | 5.5 |
| 2002 | 24.8°C | 19.1°C | 13.3°C | 30.2°C | 5.4°C | 157 mm | 80% | 1.7 m/s | 5.6 |
| 2001 | 26.5°C | 20.5°C | 14.6°C | 30.6°C | 8.5°C | 116 mm | 76% | 1.5 m/s | 6.1 |
| 2000 | 27.5°C | 21.7°C | 16.0°C | 33.7°C | 8.2°C | 90 mm | 75% | 1.8 m/s | 5.7 |
| 1999 | 25.5°C | 19.9°C | 14.2°C | 28.7°C | 8.8°C | 116 mm | 79% | 1.5 m/s | 6.2 |
| 1998 | 27.5°C | 22.0°C | 16.5°C | 32.5°C | 8.6°C | 83 mm | 79% | 1.4 m/s | 6.3 |
| 1997 ❄️ | 23.9°C | 18.2°C | 12.5°C | 29.1°C | 5.9°C | 155 mm | 77% | 1.6 m/s | 6.4 |
| 1996 | 27.1°C | 22.1°C | 17.0°C | 33.2°C | 7.5°C | 117 mm | 79% | 1.7 m/s | 6 |
| 1995 | 26.1°C | 20.8°C | 15.6°C | 31.0°C | 5.2°C | 129 mm | 79% | 1.7 m/s | 5.4 |
| 1994 | 24.4°C | 18.8°C | 13.2°C | 29.1°C | 4.3°C | 104 mm | 78% | 1.4 m/s | 6.2 |
| 1993 | 24.8°C | 19.6°C | 14.3°C | 29.0°C | 8.7°C | 121 mm | 80% | 1.4 m/s | 5.5 |
| 1992 | 25.2°C | 19.4°C | 13.6°C | 29.9°C | 4.7°C | 50 mm | 75% | 1.5 m/s | 6.3 |
| 1991 | 26.0°C | 22.1°C | 18.2°C | 29.6°C | 8.7°C | 273 mm | 88% | 1.3 m/s | 5 |
| 1990 | 24.0°C | 18.8°C | 13.7°C | 28.2°C | 7.3°C | 154 mm | 83% | 1.7 m/s | 5 |
| 1989 | 24.3°C | 18.8°C | 13.3°C | 30.8°C | 4.3°C | 101 mm | 80% | 1.7 m/s | 5.6 |
| 1988 | 26.7°C | 19.8°C | 12.9°C | 33.8°C | 6.7°C | 62 mm | 68% | 1.5 m/s | 6.5 |
| 1987 | 27.2°C | 22.4°C | 17.6°C | 31.1°C | 11.8°C | 110 mm | 81% | 1.2 m/s | 6.1 |
| 1986 | 27.0°C | 21.4°C | 15.9°C | 32.7°C | 6.3°C | 142 mm | 71% | 1.3 m/s | 5.3 |
| 1985 | 25.2°C | 19.8°C | 14.4°C | 31.6°C | 7.1°C | 106 mm | 80% | 1.6 m/s | 5.6 |
| 1984 | 23.9°C | 18.3°C | 12.7°C | 28.8°C | 6.8°C | 244 mm | 81% | 1.7 m/s | 5.7 |
| 1983 🌧️ | 23.4°C | 18.3°C | 13.3°C | 26.5°C | 6.4°C | 277 mm | 82% | 1.8 m/s | — |
| 1982 | 26.4°C | 21.1°C | 15.9°C | 30.2°C | 8.3°C | 122 mm | 81% | 1.3 m/s | — |
| 1981 | 24.6°C | 18.6°C | 12.5°C | 29.5°C | 5.5°C | 167 mm | 75% | 1.6 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 25.8°C with lows near 15.1°C (mean 20.5°C), based on 45 years of NASA POWER data.
May averages 137 mm of rainfall in Collierville, a relatively wet time of year. The wettest on record was 277 mm in 1983.
The hottest May reached 34.5°C in 2012. The coldest dipped to 2.7°C in 2013.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 1.8°C. Daytime highs moved from 24.7°C to 26°C and overnight lows from 13.8°C to 15.9°C over the same span.
May is one of the warmer months of the year in Collierville and a relatively wet time of year, so plan for around 25.8°C daytime highs and 15.1°C at night.
Not quite — May is the 8th coolest month in Collierville, averaging 20.5°C.
For May in Collierville, pack light layers you can adjust through the day, with typical highs of 25.8°C and lows of 15.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 79% — quite humid.
Average wind speed in May is 1.5 m/s. The windiest May on record averaged 1.8 m/s (1983).
The wettest May on record was 1983 with 277 mm. On average, May sees 137 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 Collierville 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.
