May is one of the warmer months of the year in Grovetown, with average highs near 28.1°C and lows around 15.7°C (mean 21.9°C). It is one of the drier months, averaging 82 mm of rainfall and 72% relative humidity across the period.
May is one of the warmer months of the year in Grovetown. Across 45 years of records, the warmest May in Grovetown was 2000 — when the month averaged 25°C — while the coldest was 1989 at 19.5°C. Typical May days reach 28.1°C with nights near 15.7°C. The long-term trend is warming, about 0.3°C per decade.
May is one of the drier months in Grovetown, averaging 82 mm of rainfall. The wettest May on record was 2025 with 198 mm, while the driest was 2000 at 18 mm.
Relative humidity in Grovetown during May averages 72%. The most humid May was 2003 at 84%, and the least humid was 2000 at 54%.
May receives about 6.1 kWh/m²/day of solar energy in Grovetown. The sunniest May was 2015 at 7 kWh/m²/day, and the cloudiest was 2003 at 4.9.
Average wind speed in Grovetown during May is 1.1 m/s. The windiest Mays were 2008, 2009 and 2017, among others at 1.2 m/s, while the calmest were 1982 and 1987 at 0.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 21.1°C | 21.4°C | 22.5°C | 22.6°C | 21.8°C | +0.7°C |
| Avg High | 27.5°C | 27.5°C | 29.1°C | 28.7°C | 27.5°C | 0°C |
| Avg Low | 14.7°C | 15.4°C | 15.9°C | 16.5°C | 16.1°C | +1.4°C |
| Avg Rain | 75 mm | 74 mm | 72 mm | 92 mm | 108 mm | +34 mm |
May temperatures in Grovetown have risen by about 1.1°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 2.5°C (1992) to a record high of 38.2°C (2019).
Rainfall in May is one of the drier months, averaging 82 mm, with a wettest year of 198 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 Grovetown
May is one of the best times to visit Grovetown. Expect days averaging 28.1°C and nights around 15.7°C (mean 21.9°C) — warmer than Grovetown's yearly average — with higher rainfall (82 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 🌧️ | 27.9°C | 22.6°C | 17.2°C | 32.5°C | 10.4°C | 198 mm | 77% | 1.1 m/s | 5.2 |
| 2024 | 28.4°C | 23.2°C | 18.0°C | 33.6°C | 12.6°C | 113 mm | 78% | 0.9 m/s | 5.7 |
| 2023 | 24.9°C | 19.8°C | 14.8°C | 31.8°C | 6.5°C | 100 mm | 80% | 1.1 m/s | 5.4 |
| 2022 | 30.2°C | 23.7°C | 17.2°C | 36.0°C | 8.9°C | 75 mm | 66% | 1.1 m/s | 6.4 |
| 2021 | 27.7°C | 21.3°C | 14.9°C | 34.7°C | 7.5°C | 76 mm | 69% | 1.1 m/s | 6.5 |
| 2020 | 25.6°C | 20.0°C | 14.4°C | 30.9°C | 6.1°C | 88 mm | 80% | 1 m/s | 6.4 |
| 2019 | 31.2°C | 24.8°C | 18.4°C | 38.2°C | 10.4°C | 56 mm | 69% | 1 m/s | 6.8 |
| 2018 | 29.1°C | 23.5°C | 17.9°C | 36.7°C | 7.9°C | 178 mm | 75% | 1 m/s | 5.8 |
| 2017 | 29.4°C | 22.8°C | 16.1°C | 35.5°C | 8.5°C | 120 mm | 68% | 1.2 m/s | 6.2 |
| 2016 | 26.8°C | 21.0°C | 15.3°C | 31.8°C | 7.1°C | 105 mm | 77% | 1.1 m/s | 6.2 |
| 2015 | 28.5°C | 22.4°C | 16.3°C | 32.4°C | 8.8°C | 40 mm | 73% | 1 m/s | 7 |
| 2014 | 26.9°C | 21.3°C | 15.8°C | 31.2°C | 9.3°C | 92 mm | 80% | 1 m/s | 6.4 |
| 2013 | 25.2°C | 19.7°C | 14.2°C | 30.6°C | 7.2°C | 92 mm | 80% | 1.1 m/s | 6 |
| 2012 | 30.3°C | 24.0°C | 17.7°C | 36.1°C | 12.0°C | 89 mm | 67% | 1.1 m/s | 6 |
| 2011 | 30.8°C | 23.4°C | 16.0°C | 37.6°C | 5.9°C | 37 mm | 63% | 1.1 m/s | 6.7 |
| 2010 | 28.5°C | 23.0°C | 17.5°C | 32.9°C | 10.1°C | 106 mm | 78% | 1.1 m/s | 5.9 |
| 2009 | 25.9°C | 21.3°C | 16.6°C | 31.4°C | 7.7°C | 125 mm | 84% | 1.2 m/s | 5.2 |
| 2008 | 28.4°C | 21.6°C | 14.9°C | 34.9°C | 8.3°C | 69 mm | 70% | 1.2 m/s | 6.6 |
| 2007 | 30.0°C | 22.5°C | 15.0°C | 34.5°C | 8.3°C | 25 mm | 58% | 1.1 m/s | 6.6 |
| 2006 | 30.0°C | 22.8°C | 15.6°C | 36.5°C | 8.9°C | 49 mm | 62% | 1.2 m/s | 6.4 |
| 2005 | 26.6°C | 20.4°C | 14.3°C | 31.9°C | 7.9°C | 57 mm | 73% | 1 m/s | 6.2 |
| 2004 | 32.1°C | 24.9°C | 17.8°C | 36.9°C | 6.0°C | 50 mm | 61% | 1.1 m/s | 6.3 |
| 2003 | 26.4°C | 21.8°C | 17.1°C | 30.8°C | 11.1°C | 178 mm | 84% | 1.1 m/s | 4.9 |
| 2002 | 29.8°C | 22.5°C | 15.1°C | 34.7°C | 7.1°C | 74 mm | 62% | 1.1 m/s | 6.4 |
| 2001 | 29.6°C | 22.5°C | 15.5°C | 35.2°C | 10.8°C | 74 mm | 66% | 1.1 m/s | 6.4 |
| 2000 🔥 | 32.7°C | 25.0°C | 17.2°C | 37.2°C | 9.5°C | 18 mm | 54% | 1.2 m/s | 6.8 |
| 1999 | 29.3°C | 22.0°C | 14.7°C | 32.9°C | 6.6°C | 48 mm | 62% | 1.1 m/s | 6.4 |
| 1998 | 28.5°C | 23.0°C | 17.6°C | 32.5°C | 11.1°C | 81 mm | 80% | 1 m/s | 6.4 |
| 1997 | 26.3°C | 19.7°C | 13.1°C | 32.2°C | 6.3°C | 61 mm | 71% | 1.2 m/s | 6.1 |
| 1996 | 27.7°C | 22.1°C | 16.4°C | 32.6°C | 5.2°C | 85 mm | 77% | 0.9 m/s | 6.5 |
| 1995 | 28.9°C | 22.7°C | 16.4°C | 34.8°C | 7.9°C | 65 mm | 71% | 1.1 m/s | 6 |
| 1994 | 27.7°C | 21.1°C | 14.4°C | 34.1°C | 9.3°C | 40 mm | 66% | 1.2 m/s | 6.4 |
| 1993 | 25.9°C | 20.4°C | 14.9°C | 30.7°C | 8.7°C | 79 mm | 79% | 0.9 m/s | 5.9 |
| 1992 | 25.9°C | 19.6°C | 13.2°C | 32.8°C | 2.5°C | 58 mm | 73% | 1 m/s | 5.9 |
| 1991 | 27.7°C | 23.0°C | 18.3°C | 33.4°C | 12.3°C | 140 mm | 84% | 1 m/s | 5.2 |
| 1990 | 26.6°C | 20.7°C | 14.8°C | 31.1°C | 7.9°C | 80 mm | 74% | 1.1 m/s | 6 |
| 1989 ❄️ | 25.8°C | 19.5°C | 13.3°C | 35.1°C | 3.6°C | 87 mm | 74% | 1.2 m/s | 6.2 |
| 1988 | 28.3°C | 21.0°C | 13.8°C | 34.6°C | 9.3°C | 44 mm | 62% | 1.1 m/s | 6.3 |
| 1987 | 27.4°C | 21.8°C | 16.3°C | 31.0°C | 9.1°C | 54 mm | 80% | 0.8 m/s | 6 |
| 1986 | 29.7°C | 22.7°C | 15.7°C | 34.8°C | 6.8°C | 87 mm | 61% | 1 m/s | 5.8 |
| 1985 | 29.0°C | 22.1°C | 15.2°C | 35.6°C | 8.6°C | 73 mm | 64% | 1.1 m/s | 6 |
| 1984 | 25.5°C | 19.8°C | 14.2°C | 29.7°C | 6.7°C | 130 mm | 79% | 1.1 m/s | 5.8 |
| 1983 | 25.4°C | 19.8°C | 14.2°C | 28.8°C | 8.0°C | 51 mm | 79% | 1.1 m/s | — |
| 1982 | 27.4°C | 21.7°C | 16.0°C | 31.1°C | 7.6°C | 76 mm | 77% | 0.8 m/s | — |
| 1981 | 29.3°C | 21.4°C | 13.6°C | 35.4°C | 7.5°C | 72 mm | 57% | 1.2 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 28.1°C with lows near 15.7°C (mean 21.9°C), based on 45 years of NASA POWER data.
May averages 82 mm of rainfall in Grovetown, one of the drier months. The wettest on record was 198 mm in 2025.
The hottest May reached 38.2°C in 2019. The coldest dipped to 2.5°C in 1992.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 1.1°C. Daytime highs moved from 27.3°C to 27.8°C and overnight lows from 14.6°C to 16.4°C over the same span.
May is one of the warmer months of the year in Grovetown and one of the drier months, so plan for around 28.1°C daytime highs and 15.7°C at night.
Not quite — May is the 8th coolest month in Grovetown, averaging 21.9°C.
For May in Grovetown, pack light layers you can adjust through the day, with typical highs of 28.1°C and lows of 15.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 72% — moderately humid.
Average wind speed in May is 1.1 m/s. The windiest May on record averaged 1.2 m/s (1981).
The wettest May on record was 2025 with 198 mm. On average, May sees 82 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 Grovetown 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.
