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 witnesses an increase in the average high-temperature, moving from a frosty 49.1°F (9.5°C) in April to a refreshing 59.4°F (15.2°C). During May nights, Boothbay Harbor records an average temperature of 45.5°F (7.5°C).Humidity
The average relative humidity in May is 80%.Rainfall
In Boothbay Harbor, in May, during 14.9 rainfall days, 2.24" (57mm) of precipitation is typically accumulated. In Boothbay Harbor, during the entire year, the rain falls for 142.1 days and collects up to 30.51" (775mm) of precipitation.Snowfall
Months with snowfall in Boothbay Harbor are January through May, November and December. May is the last month it regularly snows. During 0.1 snowfall days, in May, Boothbay Harbor aggregates 0.16" (4mm) of snow. In Boothbay Harbor, during the entire year, snow falls for 40 days and aggregates up to 20.08" (510mm) of snow.Ocean temperature
In May, the average ocean temperature is 46°F (7.8°C).Note: To swim in 46°F (7.8°C) at less than 50°F (10°C), ensure you're well-protected. Without it, be prepared for a sudden jolt of cold and breathing issues. Remember, even 55.4°F (13°C) is not welcoming.
Daylight
The average length of the day in May is 14h and 46min.On the first day of the month, sunrise is at 5:29 am and sunset at 7:41 pm. On the last day of May, sunrise is at 4:59 am and sunset at 8:13 pm EDT.
Sunshine
In Boothbay Harbor, the average sunshine in May is 8h.UV index
In May, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: A daily maximum UV index of 4 in May translates into the following instructions:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average May temperature?
What is the average humidity in May?
How many days does it rain in May?
What is the last month it snows?
What is the water temperature in May?
What is the average length of the day in May?
When is the sunrise / sunset in May?
How many hours of sunshine does Boothbay Harbor have in May?
What is the UV index intensity in May?
Average temperature in May
Boothbay Harbor, ME
- Average high temperature in May: 59.4°F
The warmest months (with the highest average high temperature) are July and August (74.1°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in May: 45.5°F
The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (18°F).
Average pressure in May
Boothbay Harbor, ME
- Average pressure in May: 29.99"Hg
The months with the highest atmospheric pressure are September and November (30.04"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in May
Boothbay Harbor, ME
- Average wind speed in May: 8.1mph
The windiest months (with the highest average wind speed) are January and March (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in May
Boothbay Harbor, ME
- Average humidity in May: 80%
The months with the highest relative humidity are June and July (82%).
The month with the lowest relative humidity is November (76%).
Average rainfall in May
Boothbay Harbor, ME
- Average rainfall in May: 2.24"
The wettest month (with the highest rainfall) is December (3.5").
The driest month (with the least rainfall) is September (1.5").
Average rainfall days in May
Boothbay Harbor, ME
- Average rainfall days in May: 14.9 days
The month with the highest number of rainy days is April (15.1 days).
The month with the least rainy days is January (6.6 days).
Average snowfall in May
Boothbay Harbor, ME
- Average snowfall in May: 0.16"
The month with the highest snowfall is January (5.28").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in May
Boothbay Harbor, ME
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is February (9.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in May
Boothbay Harbor, ME
- Average sea temperature in May: 45.9°F
The best month for swimming (with the highest average sea temperature) is August (62.2°F).
The coldest month (with the lowest average sea temperature) is March (37.9°F).
Average daylight in May /
Average sunshine in May
Boothbay Harbor, ME
- Average daylight in May: 14h and 5min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in May: 8h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The months with the least sunshine are February and December (Average sunshine: 4h and 36min).
Average sunshine days in May
Boothbay Harbor, ME
- Average sunshine days in May: 14.4 days
The month with the most sunshine days is September (17.5 days).
The month with the least sunshine days is April (11.7 days).
Average UV index in May
Boothbay Harbor, ME
- Average UV index in May: 4
The month with the highest UV index is July (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
Boothbay Harbor, ME
- Average cloud cover in May: 48
The months with the most cloud cover are February and March (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in May
Boothbay Harbor, ME
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
Boothbay Harbor, Maine, USA
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