May weather forecast
Lowell, MA

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Weather in May

In May, Lowell observes a fully-fledged spring season with invigorating daylight hours and rising temperatures. This month's standout feature is the negligible snowfall, recorded at only 0.16" (4mm), signifying the end of the winter season. Temperatures depict a significant rise, ranging from 48.7°F (9.3°C) to a pleasant 67.1°F (19.5°C), marking a departure from the chilling wintry conditions. The weather gracefully morphs into a more temperate state, setting the stage for the imminent summer heat.

Temperature

May marks a rise in the average high-temperature, moving from April's moderate 55.4°F (13°C) to an enjoyable 67.1°F (19.5°C). An average low-temperature of 48.7°F (9.3°C) is common during the nights of May.

Humidity

The average relative humidity in May is 73%.

Rainfall

In Lowell, in May, it is raining for 15.6 days, with typically 2.01" (51mm) of accumulated precipitation. Throughout the year, there are 145.9 rainfall days, and 27.48" (698mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall. May is the last month it regularly snows in Lowell. During 0.1 snowfall days, in May, Lowell aggregates 0.16" (4mm) of snow. Throughout the year, there are 32.6 snowfall days, and 21.61" (549mm) of snow is accumulated.

Daylight

The average length of the day in May is 14h and 38min.
On the first day of the month, sunrise is at 5:38 am and sunset at 7:45 pm. On the last day of May, sunrise is at 5:10 am and sunset at 8:16 pm EDT.

Sunshine

In Lowell, the average sunshine in May is 8.5h.

UV index

The average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: The daily high UV index of 5 during May translates into the following recommendations:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. To guard against the harmful effects of the Sun, minimize exposure during midday. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Updated: Jul 28, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in May?

May temperatures vary between a high-temperature of 67.1°F (19.5°C) and a low-temperature of 48.7°F (9.3°C).

What is the average humidity in May?

In May, the average relative humidity is 73%.

How many days does it rain in May?

In Lowell, during May, the rain falls for 15.6 days and regularly aggregates up to 2.01" (51mm) of precipitation.

What is the last month it snows?

May is the last month it regularly snows. During 0.1 snowfall days, in May, Lowell aggregates 0.16" (4mm) of snow.

What is the average length of the day in May?

In Lowell, Massachusetts, the average day length in May is 14h and 38min.

When are sunrise and sunset in May?

On the first day of May, sunrise is at 5:38 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 5:10 am and sunset at 8:16 pm EDT.

How long on average sun shines in May?

The average sunshine duration in May is 8.5h.

What is the UV index reading in May?

In May, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Lowell, MA

Average temperature in May - Lowell, MA
  • Average high temperature in May: 67.1°F

The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (32.5°F).

  • Average low temperature in May: 48.7°F

The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (19.9°F).

Average pressure in May
Lowell, MA

Average pressure in May - Lowell, MA
  • Average pressure in May: 30"Hg

The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in May
Lowell, MA

Average wind speed in May - Lowell, MA
  • Average wind speed in May: 6.6mph

The windiest month (with the highest average wind speed) is January (8.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).

Average humidity in May
Lowell, MA

Average humidity in May - Lowell, MA
  • Average humidity in May: 73%

The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is April (70%).

Average rainfall in May
Lowell, MA

Average rainfall in May - Lowell, MA
  • Average rainfall in May: 2.01"

The wettest month (with the highest rainfall) is December (2.87").
The driest month (with the least rainfall) is September (1.46").

Average rainfall days in May
Lowell, MA

Average rainfall days in May - Lowell, MA
  • Average rainfall days in May: 15.6 days

The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is February (6.9 days).

Average snowfall in May
Lowell, MA

Average snowfall in May - Lowell, MA
  • Average snowfall in May: 0.16"

The month with the highest snowfall is February (5.98").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in May
Lowell, MA

Average snowfall days in May - Lowell, MA
  • Average snowfall days in May: 0.1 days

The month with the highest number of snowfall days is February (8.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in May /
Average sunshine in May
Lowell, MA

Average daylight in May / Average sunshine in May - Lowell, MA
  • Average daylight in May: 14h and 4min

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in May: 8h and 3min

The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

Average sunshine days in May
Lowell, MA

Average sunshine days in May - Lowell, MA
  • Average sunshine days in May: 13.6 days

The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is May (13.6 days).

Average UV index in May
Lowell, MA

Average UV index in May - Lowell, 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, November and December (UV index 2).

Average cloud cover in May
Lowell, MA

Average cloud cover in May - Lowell, MA
  • Average cloud cover in May: 46

The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 31).

Average visibility in May
Lowell, MA

Average visibility in May - Lowell, MA
  • Average visibility in May: 6mi

The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is February (5mi).

Lowell, Massachusetts, USA

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