May weather forecast
Harvard, MA

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Weather in May

The last month of the spring, May, is an enjoyable month in Harvard, Massachusetts, with an average temperature varying between 48.7°F (9.3°C) and 67.8°F (19.9°C).

Temperature

The start of May is characterized by an increase in the average high-temperature, transitioning from a moderate 56.1°F (13.4°C) in April to a comfortable 67.8°F (19.9°C). During the month of May, Harvard's nighttime temperature lowers to an average of 48.7°F (9.3°C).

Humidity

In Harvard, the average relative humidity in May is 73%.

Rainfall

In Harvard, in May, during 15.3 rainfall days, 1.97" (50mm) of precipitation is typically accumulated. In Harvard, Massachusetts, during the entire year, the rain falls for 140 days and collects up to 27.09" (688mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in Harvard, Massachusetts. May is the last month it regularly snows. During 0.1 snowfall days, in May, Harvard aggregates 0.12" (3mm) of snow. Throughout the year, there are 34.1 snowfall days, and 23.58" (599mm) of snow is accumulated.

Daylight

In May, the average length of the day in Harvard is 14h and 38min.
On the first day of May, sunrise is at 5:40 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 5:11 am and sunset at 8:16 pm EDT.

Sunshine

In May, the average sunshine in Harvard, Massachusetts, is 8.3h.

UV index

In May, the average daily maximum UV index in Harvard is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the average person.
Note: In May, the UV index of 5 transforms into the following advice:
Heed the precautions - Suggestions to avoid sunburn are made. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. During bright days, sunglasses that offer UVA and UVB defense are recommended. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
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Frequently asked questions

What is the average May temperature in Harvard?

In Harvard, in May, the average high-temperature is 67.8°F (19.9°C), and the average low-temperature is 48.7°F (9.3°C).

What is the average humidity in May in Harvard?

The average relative humidity in May in Harvard is 73%.

How many days does it rain in May in Harvard?

In Harvard, Massachusetts, in May, during 15.3 rainfall days, 1.97" (50mm) of precipitation is typically accumulated.

What is the last month it snows in Harvard?

May is the last month it regularly snows in Harvard. During 0.1 snowfall days, in May, Harvard aggregates 0.12" (3mm) of snow.

What is the average length of the day in May in Harvard?

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

When are sunrise and sunset in May in Harvard?

In May, on the first day of the month, sunrise is at 5:40 am and sunset at 7:46 pm. On the last day of the month, in Harvard, sunrise is at 5:11 am and sunset at 8:16 pm EDT.

How many hours of sunshine does Harvard have in May?

In Harvard, Massachusetts, the average sunshine duration in May is 8.3h.

What is the UV index reading in May in Harvard?

In Harvard, the average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from exposure to Sun's UV rays.
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
Harvard, MA

Average temperature in May - Harvard, MA
  • Average high temperature in May: 67.8°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°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).

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Average pressure in May
Harvard, MA

Average pressure in May - Harvard, 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).

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Average wind speed in May
Harvard, MA

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

The windiest month (with the highest average wind speed) is January (8.5mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).

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Average humidity in May
Harvard, MA

Average humidity in May - Harvard, 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%).

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Average rainfall in May
Harvard, MA

Average rainfall in May - Harvard, MA
  • Average rainfall in May: 1.97"

The wettest month (with the highest rainfall) is October (2.68").
The driest month (with the least rainfall) is September (1.38").

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Average rainfall days in May
Harvard, MA

Average rainfall days in May - Harvard, MA
  • Average rainfall days in May: 15.3 days

The month with the highest number of rainy days is May (15.3 days).
The months with the least rainy days are January and February (6.5 days).

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Average snowfall in May
Harvard, MA

Average snowfall in May - Harvard, MA
  • Average snowfall in May: 0.12"

The month with the highest snowfall is February (6.14").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in May
Harvard, MA

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

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

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

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

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 6min).

  • Average sunshine in May: 8h and 2min

The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).

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Average sunshine days in May
Harvard, MA

Average sunshine days in May - Harvard, MA
  • Average sunshine days in May: 14.2 days

The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is April (13.7 days).

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Average UV index in May
Harvard, MA

Average UV index in May - Harvard, 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).

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Average cloud cover in May
Harvard, MA

Average cloud cover in May - Harvard, MA
  • Average cloud cover in May: 48

The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 35).

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Average visibility in May
Harvard, MA

Average visibility in May - Harvard, MA
  • Average visibility in May: 5mi

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

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Harvard, Massachusetts, USA

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