Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average sea temperature in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
May brings a rise in the average high-temperature, transitioning from April's cool 55.2°F (12.9°C) to an enjoyable 66.4°F (19.1°C). During the nights in May, the temperature in Winthrop averages to a fresh 50°F (10°C).Humidity
The average relative humidity in May is 72%.Rainfall
In Winthrop, Massachusetts, in May, it is raining for 15.3 days, with typically 1.81" (46mm) of accumulated precipitation. Throughout the year, there are 141.4 rainfall days, and 27.2" (691mm) of precipitation is accumulated.Snowfall
Months with snowfall in Winthrop are January through May, October through December. May is the last month it regularly snows in Winthrop. During 0.1 snowfall days, in May, Winthrop aggregates 0.04" (1mm) of snow. Throughout the year, there are 29.8 snowfall days, and 15.75" (400mm) of snow is accumulated.Ocean temperature
In May, the average ocean temperature in Winthrop, Massachusetts, is 49.1°F (9.5°C).Note: With the appropriate swimsuit, one can swim in 49.1°F (9.5°C) even if temperatures dip below 50°F (10°C); otherwise, be ready for cold shock and breath issues. A fleeting swim around 55.4°F (13°C) is distressing.
Daylight
The average length of the day in May in Winthrop is 14h and 37min.On the first day of the month, sunrise is at 5:37 am and sunset at 7:43 pm. On the last day of May, sunrise is at 5:09 am and sunset at 8:13 pm EDT.
Sunshine
In May, the average sunshine in Winthrop is 8.3h.UV index
In Winthrop, Massachusetts, the average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: An average maximum UV index of 5 in May leads to these recommendations:
Put precautions into practice - Guidance to elude sunburn is provided. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Boost your sun resistance with garments that are densely woven yet spacious. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Frequently asked questions
What is the average May temperature in Winthrop?
What is the average humidity in May in Winthrop?
How many days does it rain in May in Winthrop?
What is the last month it snows in Winthrop?
What is the ocean temperature in May in Winthrop?
What is the average length of the day in May in Winthrop?
What time are sunrise and sunset in May in Winthrop?
How long on average sun shines in May in Winthrop?
What is the UV index reading in May in Winthrop?
Average temperature in May
Winthrop, MA
- Average high temperature in May: 66.4°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (34.2°F).
- Average low temperature in May: 50°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).
Average pressure in May
Winthrop, MA
- Average pressure in May: 30.01"Hg
The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in May
Winthrop, MA
- Average wind speed in May: 7.4mph
The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in May
Winthrop, MA
- Average humidity in May: 72%
The month with the highest relative humidity is February (77%).
The month with the lowest relative humidity is April (69%).
Average rainfall in May
Winthrop, MA
- Average rainfall in May: 1.81"
The wettest months (with the highest rainfall) are March, April and December (2.91").
The driest month (with the least rainfall) is September (1.26").
Average rainfall days in May
Winthrop, MA
- Average rainfall days in May: 15.3 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (7.9 days).
Average snowfall in May
Winthrop, MA
- Average snowfall in May: 0.04"
The month with the highest snowfall is February (4.72").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Winthrop, MA
- Average snowfall days in May: 0.1 days
The months with the highest number of snowfall days are January and February (7.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in May
Winthrop, MA
- Average sea temperature in May: 49°F
The best month for swimming (with the highest average sea temperature) is August (67.6°F).
The coldest month (with the lowest average sea temperature) is March (38.8°F).
Average daylight in May /
Average sunshine in May
Winthrop, 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 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in May
Winthrop, MA
- Average sunshine days in May: 14.2 days
The month with the most sunshine days is September (17.7 days).
The month with the least sunshine days is April (13 days).
Average UV index in May
Winthrop, 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
Winthrop, MA
- Average cloud cover in May: 46
The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in May
Winthrop, 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).
Winthrop, Massachusetts, USA
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