May is one of the warmer months of the year in Fall River, with average highs near 16.9°C and lows around 9.3°C (mean 13.1°C). It is about average for rainfall, averaging 92 mm of rainfall and 81% relative humidity across the period.
May is one of the warmer months of the year in Fall River. Across 45 years of records, the warmest May in Fall River was 2012 — when the month averaged 15.3°C — while the coldest was 2005 at 10.8°C. Typical May days reach 16.9°C with nights near 9.3°C. The long-term trend is warming, about 0.3°C per decade.
May is about average for rainfall in Fall River, averaging 92 mm of rainfall. The wettest May on record was 2025 with 202 mm, while the driest was 2015 at 34 mm.
Relative humidity in Fall River during May averages 81%. The most humid May was 2024 at 85%, and the least humid was 2023 at 74%.
May receives about 5.7 kWh/m²/day of solar energy in Fall River. The sunniest May was 2023 at 7 kWh/m²/day, and the cloudiest was 1984 at 4.5.
Average wind speed in Fall River during May is 1.6 m/s. The windiest Mays were 1997, 2008 and 2020 at 1.9 m/s, while the calmest was 1982 at 1.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 12.8°C | 12.6°C | 12.8°C | 13.8°C | 13.6°C | +0.8°C |
| Avg High | 16.7°C | 16.6°C | 16.6°C | 17.5°C | 17.3°C | +0.6°C |
| Avg Low | 8.9°C | 8.7°C | 9.0°C | 10.2°C | 9.9°C | +1°C |
| Avg Rain | 99 mm | 83 mm | 91 mm | 84 mm | 114 mm | +15 mm |
May temperatures in Fall River have risen by about 1.1°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 2°C (1986) to a record high of 27.5°C (2007).
Rainfall in May is about average for rainfall, averaging 92 mm, with a wettest year of 202 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.
A good time to visit Fall River
May is a good time to visit Fall River, with days averaging 16.9°C and nights around 9.3°C (mean 13.1°C, warmer than Fall River's yearly average) and higher rainfall. August and July are marginally more temperate, but May still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 🌧️ | 17.1°C | 13.8°C | 10.5°C | 22.3°C | 5.7°C | 202 mm | 84% | 1.7 m/s | 5.1 |
| 2024 | 17.5°C | 14.1°C | 10.6°C | 23.0°C | 6.3°C | 163 mm | 85% | 1.6 m/s | 5.6 |
| 2023 | 17.8°C | 13.6°C | 9.4°C | 23.6°C | 3.5°C | 74 mm | 74% | 1.7 m/s | 7 |
| 2022 | 17.7°C | 14.0°C | 10.4°C | 25.8°C | 4.3°C | 52 mm | 80% | 1.8 m/s | 5.9 |
| 2021 | 17.7°C | 13.8°C | 10.0°C | 25.5°C | 5.2°C | 124 mm | 76% | 1.6 m/s | 5.9 |
| 2020 | 16.1°C | 12.2°C | 8.3°C | 22.1°C | 2.8°C | 72 mm | 79% | 1.9 m/s | 6.5 |
| 2019 | 16.2°C | 12.7°C | 9.1°C | 23.8°C | 4.5°C | 101 mm | 83% | 1.7 m/s | 5.3 |
| 2018 | 18.1°C | 14.2°C | 10.3°C | 25.9°C | 5.5°C | 58 mm | 84% | 1.5 m/s | 5.4 |
| 2017 | 15.9°C | 12.6°C | 9.4°C | 23.8°C | 5.3°C | 158 mm | 83% | 1.8 m/s | 4.9 |
| 2016 | 17.2°C | 13.5°C | 9.9°C | 24.2°C | 5.0°C | 85 mm | 80% | 1.7 m/s | 5.5 |
| 2015 | 18.6°C | 14.5°C | 10.3°C | 25.2°C | 3.1°C | 34 mm | 79% | 1.6 m/s | 6.4 |
| 2014 | 17.1°C | 13.4°C | 9.8°C | 25.7°C | 5.9°C | 65 mm | 81% | 1.6 m/s | 5.7 |
| 2013 | 17.7°C | 13.8°C | 9.8°C | 26.3°C | 5.0°C | 82 mm | 81% | 1.7 m/s | 5.9 |
| 2012 🔥 | 18.7°C | 15.3°C | 11.9°C | 26.4°C | 7.7°C | 116 mm | 83% | 1.4 m/s | 5 |
| 2011 | 17.3°C | 13.9°C | 10.5°C | 25.1°C | 4.9°C | 74 mm | 85% | 1.6 m/s | 5.1 |
| 2010 | 18.5°C | 14.5°C | 10.6°C | 27.5°C | 3.4°C | 70 mm | 80% | 1.6 m/s | 6.4 |
| 2009 | 16.8°C | 13.4°C | 10.0°C | 22.0°C | 6.5°C | 88 mm | 82% | 1.6 m/s | 5 |
| 2008 | 16.2°C | 12.4°C | 8.6°C | 21.5°C | 2.3°C | 59 mm | 78% | 1.9 m/s | 5.7 |
| 2007 | 17.7°C | 13.5°C | 9.3°C | 27.5°C | 3.0°C | 55 mm | 78% | 1.6 m/s | 6.6 |
| 2006 | 16.5°C | 13.1°C | 9.6°C | 24.0°C | 5.4°C | 178 mm | 84% | 1.8 m/s | 5.1 |
| 2005 ❄️ | 14.4°C | 10.8°C | 7.3°C | 20.8°C | 3.4°C | 91 mm | 83% | 1.8 m/s | 5.2 |
| 2004 | 17.6°C | 13.5°C | 9.4°C | 24.0°C | 4.6°C | 71 mm | 84% | 1.4 m/s | 5.5 |
| 2003 | 15.5°C | 11.8°C | 8.1°C | 22.9°C | 4.3°C | 80 mm | 84% | 1.5 m/s | 4.9 |
| 2002 | 16.2°C | 12.5°C | 8.8°C | 20.7°C | 4.1°C | 107 mm | 76% | 1.8 m/s | 6 |
| 2001 | 17.9°C | 13.7°C | 9.6°C | 25.9°C | 3.7°C | 93 mm | 77% | 1.6 m/s | 5.8 |
| 2000 | 17.0°C | 13.1°C | 9.1°C | 25.9°C | 2.8°C | 84 mm | 82% | 1.6 m/s | 5.4 |
| 1999 | 18.2°C | 13.9°C | 9.7°C | 25.9°C | 3.8°C | 78 mm | 77% | 1.4 m/s | 6 |
| 1998 | 17.2°C | 13.5°C | 9.8°C | 23.0°C | 4.8°C | 133 mm | 84% | 1.7 m/s | 5.9 |
| 1997 | 14.8°C | 11.3°C | 7.8°C | 19.6°C | 3.7°C | 78 mm | 79% | 1.9 m/s | 5.9 |
| 1996 | 16.3°C | 12.2°C | 8.2°C | 23.7°C | 2.0°C | 73 mm | 80% | 1.5 m/s | 5.6 |
| 1995 | 16.0°C | 12.1°C | 8.3°C | 22.9°C | 3.6°C | 82 mm | 79% | 1.6 m/s | 5.3 |
| 1994 | 15.6°C | 11.7°C | 7.7°C | 22.9°C | 4.3°C | 69 mm | 81% | 1.8 m/s | 5.8 |
| 1993 | 17.6°C | 13.5°C | 9.4°C | 22.2°C | 6.1°C | 35 mm | 80% | 1.4 m/s | 5.7 |
| 1992 | 16.5°C | 11.8°C | 7.1°C | 27.3°C | 2.4°C | 54 mm | 77% | 1.6 m/s | 6.2 |
| 1991 | 19.2°C | 14.9°C | 10.7°C | 25.1°C | 6.4°C | 74 mm | 80% | 1.5 m/s | 6.2 |
| 1990 | 15.0°C | 11.5°C | 7.9°C | 19.1°C | 5.1°C | 153 mm | 82% | 1.8 m/s | 5.2 |
| 1989 | 16.5°C | 12.9°C | 9.3°C | 21.6°C | 5.4°C | 144 mm | 85% | 1.6 m/s | 5.6 |
| 1988 | 16.6°C | 12.8°C | 9.1°C | 24.7°C | 4.5°C | 78 mm | 84% | 1.5 m/s | 5.1 |
| 1987 | 16.1°C | 12.2°C | 8.2°C | 25.5°C | 3.9°C | 52 mm | 84% | 1.6 m/s | 5.8 |
| 1986 | 17.1°C | 13.0°C | 9.0°C | 25.3°C | 2.0°C | 44 mm | 80% | 1.7 m/s | 6.2 |
| 1985 | 16.9°C | 13.0°C | 9.1°C | 23.6°C | 3.4°C | 131 mm | 79% | 1.7 m/s | 6 |
| 1984 | 16.1°C | 12.4°C | 8.8°C | 21.4°C | 4.0°C | 200 mm | 85% | 1.7 m/s | 4.5 |
| 1983 | 15.5°C | 12.1°C | 8.7°C | 20.4°C | 3.3°C | 108 mm | 85% | 1.8 m/s | — |
| 1982 | 17.9°C | 13.6°C | 9.3°C | 25.0°C | 6.2°C | 65 mm | 81% | 1.2 m/s | — |
| 1981 | 17.2°C | 13.1°C | 9.0°C | 24.0°C | 3.3°C | 73 mm | 78% | 1.7 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 16.9°C with lows near 9.3°C (mean 13.1°C), based on 45 years of NASA POWER data.
May averages 92 mm of rainfall in Fall River, about average for rainfall. The wettest on record was 202 mm in 2025.
The hottest May reached 27.5°C in 2007. The coldest dipped to 2°C in 1986.
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 16.7°C to 17.6°C and overnight lows from 9°C to 10.2°C over the same span.
May is one of the warmer months of the year in Fall River and about average for rainfall, so plan for around 16.9°C daytime highs and 9.3°C at night.
Not quite — May is the 7th coolest month in Fall River, averaging 13.1°C.
For May in Fall River, pack light layers you can adjust through the day, with typical highs of 16.9°C and lows of 9.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 81% — quite humid.
Average wind speed in May is 1.6 m/s. The windiest May on record averaged 1.9 m/s (1997).
The wettest May on record was 2025 with 202 mm. On average, May sees 92 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 Fall River 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.
