May weather forecastFall River, MA

May

Weather in May

May signals the closing chapter of spring as Summer starts making itself felt. The climate transitions profoundly, with a palpable increase in temperature and relative humidity. The warming up leads to the city receiving only 0.08" (2mm) of snow this month, marking the end of the snow laps. More hours of sunshine pave the way for outdoor pursuits and leisure activities. May is a month of transformation for Fall River, Massachusetts as it readies itself for the forthcoming summer months.

Temperature

The onset of May brings a temperature shift, with the average high-temperature moving from a cool 54.1°F (12.3°C) in April to a refreshing 64°F (17.8°C). During the month of May, Fall River experiences a steady low-temperature average of 50.7°F (10.4°C).

Humidity

In May, the average relative humidity in Fall River is 78%.

Rainfall

In May, the rain falls for 13.7 days. Throughout May, 1.34" (34mm) of precipitation is accumulated. Throughout the year, there are 135.4 rainfall days, and 18.31" (465mm) of precipitation is accumulated.

Snowfall

January through May, November and December are months with snowfall. May is the last month it regularly snows. During 0.2 snowfall days, in May, Fall River aggregates 0.08" (2mm) of snow. In Fall River, during the entire year, snow falls for 21.2 days and aggregates up to 7.17" (182mm) of snow.

Ocean temperature

In Fall River, in May, the average water temperature is 50.9°F (10.5°C).
Note: Danger awaits those who swim in 50.9°F (10.5°C) without protection. Falling below 50°F (10°C) means intense cold shock and hyperventilation.

Daylight

In May, the average length of the day is 14h and 34min.
On the first day of the month, sunrise is at 5:40 am and sunset at 7:43 pm. On the last day of May, sunrise is at 5:12 am and sunset at 8:12 pm EDT.

Sunshine

In May, the average sunshine is 8.6h.

UV index

The average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: The maximum UV index of 5 during May leads to these instructions:
Make use of precautions - Shielding skin and eyes from injury is a requirement. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Opt for tightly woven and loose clothing to enhance protection from the Sun. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.

Updated: Jun 4, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

The high-temperature during May is 64°F (17.8°C) and the low-temperature is 50.7°F (10.4°C).

In May, the average relative humidity is 78%.

In Fall River, during May, the rain falls for 13.7 days and regularly aggregates up to 1.34" (34mm) of precipitation.

May is the last month it regularly snows in Fall River. During 0.2 snowfall days, in May, Fall River aggregates 0.08" (2mm) of snow.

In Fall River, in May, the average water temperature is 50.9°F (10.5°C). At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

In Fall River, the average day length in May is 14h and 34min.

On the first day of May, sunrise is at 5:40 am and sunset at 7:43 pm. On the last day of the month, sunrise is at 5:12 am and sunset at 8:12 pm EDT.

In Fall River, the average sunshine duration in May is 8.6h.

The average daily maximum UV index in May in Fall River, Massachusetts, is 5. A UV Index reading of 3 to 5 represents a medium hazard to health from unsafe exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A May J J A S O N D

Apr

May

Jun

Average high temperature

54.1°F

64°F

72°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

10.8mph

9.3mph

8.6mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

0.9

0.2

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

13.6

15.1

13.8

Average UV index

Average cloud cover

Average visibility

Average temperature in May
Fall River, MA

Average high temperature in May: 64°F

The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (36°F).

Average low temperature in May: 50.7°F

The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (25.2°F).

Average pressure in May
Fall River, MA

Average pressure in May: 30.01"Hg

The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in May
Fall River, MA

Average wind speed in May: 8.8mph

The windiest months (with the highest average wind speed) are January, February and March (10.9mph).
The calmest month (with the lowest average wind speed) is August (7.3mph).

Average humidity in May
Fall River, MA

Average humidity in May: 78%

The month with the highest relative humidity is June (80%).
The month with the lowest relative humidity is April (73%).

Average rainfall in May
Fall River, MA

Average rainfall in May: 1.34"

The wettest month (with the highest rainfall) is October (1.97").
The driest month (with the least rainfall) is September (1.06").

Average rainfall days in May
Fall River, MA

Average rainfall days in May: 13.7 days

The month with the highest number of rainy days is July (15 days).
The month with the least rainy days is February (6.9 days).

Average snowfall in May
Fall River, MA

Average snowfall in May: 0.08"

The month with the highest snowfall is March (2.13").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days in May
Fall River, MA

Average snowfall days in May: 0.2 days

The month with the highest number of snowfall days is January (5.9 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

Average sea temperature in May
Fall River, MA

Average sea temperature in May: 50.9°F

The best month for swimming (with the highest average sea temperature) is August (69.3°F).
The coldest month (with the lowest average sea temperature) is February (38.1°F).

Average daylight in May /
Average sunshine in May
Fall River, MA

Average daylight in May: 14h and 36min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

Average sunshine in May: 8h and 36min

The month with the most sunshine is August (Average sunshine: 10h and 36min).
The months with the least sunshine are February and December (Average sunshine: 4h and 54min).

Average sunshine days in May
Fall River, MA

Average sunshine days in May: 15.1 days

The month with the most sunshine days is November (19.2 days).
The month with the least sunshine days is April (13.6 days).

Average UV index in May
Fall River, MA

Average UV index in May: 5

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March and December (UV index 2).

Average cloud cover in May
Fall River, MA

Average cloud cover in May: 44

The month with the most cloud cover is March (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 29).

Average visibility in May
Fall River, MA

Average visibility in May: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).