May is one of the warmer months of the year in Florence, with average highs near 25°C and lows around 14.4°C (mean 19.7°C). It is a relatively wet time of year, averaging 129 mm of rainfall and 80% relative humidity across the period.
May is one of the warmer months of the year in Florence. Across 45 years of records, the warmest May in Florence was 2018 — when the month averaged 22.5°C — while the coldest were 1981 and 1997 at 17.5°C. Typical May days reach 25°C with nights near 14.4°C. The long-term trend is warming, about 0.3°C per decade.
May is a relatively wet time of year in Florence, averaging 129 mm of rainfall. The wettest May on record was 1991 with 368 mm, while the driest was 2007 at 31 mm.
Relative humidity in Florence during May averages 80%. The most humid May was 1991 at 87%, and the least humid was 2007 at 63%.
May receives about 5.9 kWh/m²/day of solar energy in Florence. The sunniest Mays were 1988, 2005 and 2007 at 6.6 kWh/m²/day, and the cloudiest was 1991 at 4.6.
Average wind speed in Florence during May is 1.4 m/s. The windiest May was 1983 at 1.7 m/s, while the calmest were 1987, 2012 and 2018, among others at 1.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 19.0°C | 19.4°C | 19.8°C | 20.4°C | 19.9°C | +0.9°C |
| Avg High | 24.6°C | 24.6°C | 25.2°C | 25.5°C | 25.0°C | +0.4°C |
| Avg Low | 13.5°C | 14.1°C | 14.4°C | 15.2°C | 14.8°C | +1.3°C |
| Avg Rain | 143 mm | 135 mm | 123 mm | 117 mm | 130 mm | -13 mm |
May temperatures in Florence have risen by about 1.7°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 1.9°C (2013) to a record high of 32.2°C (2011).
Rainfall in May is a relatively wet time of year, averaging 129 mm, with a wettest year of 368 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 Florence
May is one of the best times to visit Florence. Expect days averaging 25°C and nights around 14.4°C (mean 19.7°C) — warmer than Florence's yearly average — with higher rainfall (129 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 | 24.4°C | 20.1°C | 15.8°C | 28.4°C | 8.4°C | 193 mm | 85% | 1.4 m/s | 4.9 |
| 2024 | 26.8°C | 21.9°C | 16.9°C | 29.9°C | 11.9°C | 139 mm | 82% | 1.3 m/s | 5.8 |
| 2023 | 25.1°C | 19.9°C | 14.7°C | 29.8°C | 4.5°C | 106 mm | 81% | 1.3 m/s | 5.9 |
| 2022 | 26.3°C | 20.9°C | 15.5°C | 29.9°C | 8.4°C | 116 mm | 82% | 1.4 m/s | 6.1 |
| 2021 | 24.0°C | 18.5°C | 13.1°C | 30.1°C | 6.7°C | 114 mm | 78% | 1.5 m/s | 6 |
| 2020 | 23.4°C | 18.2°C | 13.0°C | 28.0°C | 3.0°C | 110 mm | 83% | 1.4 m/s | 6 |
| 2019 | 26.7°C | 21.7°C | 16.7°C | 30.8°C | 7.6°C | 94 mm | 82% | 1.3 m/s | 6.3 |
| 2018 🔥 | 27.3°C | 22.5°C | 17.7°C | 31.4°C | 9.3°C | 137 mm | 83% | 1.1 m/s | 6.1 |
| 2017 | 25.3°C | 19.8°C | 14.4°C | 29.6°C | 5.3°C | 130 mm | 77% | 1.4 m/s | 6.2 |
| 2016 | 24.2°C | 18.9°C | 13.6°C | 29.3°C | 5.6°C | 45 mm | 79% | 1.4 m/s | 6.3 |
| 2015 | 25.2°C | 20.2°C | 15.2°C | 28.0°C | 6.4°C | 145 mm | 82% | 1.3 m/s | 5.8 |
| 2014 | 25.1°C | 19.9°C | 14.7°C | 29.2°C | 6.4°C | 77 mm | 80% | 1.4 m/s | 6.3 |
| 2013 | 23.5°C | 18.4°C | 13.4°C | 28.0°C | 1.9°C | 126 mm | 82% | 1.4 m/s | 5.9 |
| 2012 | 27.1°C | 21.8°C | 16.4°C | 32.0°C | 10.1°C | 98 mm | 76% | 1.1 m/s | 6.3 |
| 2011 | 24.4°C | 19.1°C | 13.8°C | 32.2°C | 4.2°C | 97 mm | 82% | 1.5 m/s | 6.1 |
| 2010 | 26.0°C | 21.2°C | 16.4°C | 30.0°C | 6.9°C | 221 mm | 82% | 1.4 m/s | 5.8 |
| 2009 | 23.8°C | 19.4°C | 15.0°C | 28.9°C | 4.8°C | 197 mm | 86% | 1.5 m/s | 5 |
| 2008 | 24.7°C | 19.2°C | 13.7°C | 29.3°C | 6.8°C | 188 mm | 80% | 1.5 m/s | 5.8 |
| 2007 | 28.3°C | 21.8°C | 15.2°C | 31.7°C | 7.3°C | 31 mm | 63% | 1.3 m/s | 6.6 |
| 2006 | 24.9°C | 19.4°C | 13.9°C | 31.5°C | 6.5°C | 99 mm | 81% | 1.3 m/s | 6 |
| 2005 | 24.2°C | 18.2°C | 12.2°C | 29.5°C | 3.6°C | 33 mm | 76% | 1.2 m/s | 6.6 |
| 2004 | 26.0°C | 21.3°C | 16.6°C | 29.6°C | 5.1°C | 123 mm | 82% | 1.5 m/s | 5.9 |
| 2003 | 24.7°C | 20.1°C | 15.5°C | 28.5°C | 10.0°C | 254 mm | 85% | 1.6 m/s | 4.9 |
| 2002 | 23.9°C | 18.3°C | 12.7°C | 28.6°C | 4.1°C | 138 mm | 80% | 1.6 m/s | 5.7 |
| 2001 | 25.1°C | 19.4°C | 13.7°C | 28.5°C | 8.2°C | 122 mm | 78% | 1.4 m/s | 6.2 |
| 2000 | 26.5°C | 20.8°C | 15.1°C | 30.4°C | 7.7°C | 46 mm | 77% | 1.5 m/s | 5.9 |
| 1999 | 24.9°C | 19.1°C | 13.4°C | 27.7°C | 8.2°C | 114 mm | 79% | 1.4 m/s | 6.4 |
| 1998 | 26.5°C | 21.1°C | 15.7°C | 30.3°C | 8.4°C | 100 mm | 81% | 1.3 m/s | 6.3 |
| 1997 | 23.2°C | 17.5°C | 11.9°C | 27.9°C | 6.3°C | 185 mm | 78% | 1.5 m/s | 5.9 |
| 1996 | 26.1°C | 21.0°C | 15.9°C | 31.5°C | 6.0°C | 60 mm | 82% | 1.4 m/s | 6.3 |
| 1995 | 24.9°C | 19.8°C | 14.7°C | 28.5°C | 5.8°C | 98 mm | 81% | 1.4 m/s | 5.4 |
| 1994 | 23.4°C | 17.7°C | 12.1°C | 28.1°C | 4.6°C | 109 mm | 79% | 1.4 m/s | 6.3 |
| 1993 | 24.2°C | 19.2°C | 14.2°C | 28.2°C | 8.8°C | 125 mm | 81% | 1.3 m/s | 5.6 |
| 1992 | 23.9°C | 18.4°C | 12.8°C | 28.3°C | 3.9°C | 47 mm | 78% | 1.3 m/s | 6 |
| 1991 🌧️ | 25.6°C | 21.6°C | 17.6°C | 29.6°C | 8.3°C | 368 mm | 87% | 1.3 m/s | 4.6 |
| 1990 | 23.5°C | 18.2°C | 12.8°C | 27.6°C | 6.9°C | 145 mm | 83% | 1.5 m/s | 5.1 |
| 1989 | 23.3°C | 17.8°C | 12.4°C | 29.5°C | 3.5°C | 137 mm | 81% | 1.5 m/s | 5.4 |
| 1988 | 24.9°C | 18.5°C | 12.1°C | 31.6°C | 6.4°C | 63 mm | 70% | 1.3 m/s | 6.6 |
| 1987 | 26.3°C | 21.5°C | 16.7°C | 29.8°C | 9.9°C | 74 mm | 82% | 1.1 m/s | 5.9 |
| 1986 | 26.4°C | 20.7°C | 14.9°C | 32.1°C | 4.2°C | 184 mm | 71% | 1.4 m/s | 5.3 |
| 1985 | 24.4°C | 19.1°C | 13.9°C | 29.6°C | 7.5°C | 97 mm | 81% | 1.5 m/s | 5.8 |
| 1984 | 23.6°C | 17.8°C | 12.1°C | 27.9°C | 5.0°C | 232 mm | 81% | 1.6 m/s | 5.8 |
| 1983 | 23.1°C | 17.9°C | 12.7°C | 26.2°C | 5.8°C | 300 mm | 83% | 1.7 m/s | — |
| 1982 | 25.8°C | 20.6°C | 15.5°C | 29.2°C | 8.6°C | 101 mm | 80% | 1.1 m/s | — |
| 1981 ❄️ | 23.7°C | 17.5°C | 11.4°C | 29.6°C | 4.3°C | 100 mm | 76% | 1.4 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 25°C with lows near 14.4°C (mean 19.7°C), based on 45 years of NASA POWER data.
May averages 129 mm of rainfall in Florence, a relatively wet time of year. The wettest on record was 368 mm in 1991.
The hottest May reached 32.2°C in 2011. 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 1.7°C. Daytime highs moved from 24.1°C to 25.3°C and overnight lows from 13.1°C to 15.2°C over the same span.
May is one of the warmer months of the year in Florence and a relatively wet time of year, so plan for around 25°C daytime highs and 14.4°C at night.
Not quite — May is the 8th coolest month in Florence, averaging 19.7°C.
For May in Florence, pack light layers you can adjust through the day, with typical highs of 25°C and lows of 14.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 80% — quite humid.
Average wind speed in May is 1.4 m/s. The windiest May on record averaged 1.7 m/s (1983).
The wettest May on record was 1991 with 368 mm. On average, May sees 129 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 Florence 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.
