August weather forecastDeer Isle, ME
August
Weather in August
August retains the summer charm in Deer Isle, Maine. Average temperatures remain similar to those in July at around 68.9°F (20.5°C), giving August status as a peak summer month. The adequate sunshine, combined with warm temperatures, makes it a favorable month for water-based activities. While the summer heat lingers, the decrease of humidity and the onset of cooler evenings brings the promise of incoming autumn. It's an excellent period for vacationing due to predictable, favorable weather patterns.Temperature
The warmest time of the year is August, with temperatures averaging a high of 68.9°F (20.5°C) and a low of 59.9°F (15.5°C).Humidity
In Deer Isle, the average relative humidity in August is 84%.Rainfall
In Deer Isle, in August, it is raining for 10.2 days, with typically 1.26" (32mm) of accumulated precipitation. Throughout the year, there are 115.5 rainfall days, and 17.95" (456mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Ocean temperature
August is the month with the warmest seawater, with an average ocean temperature of 58.6°F (14.8°C).Note: Engaging in a swim in 58.6°F (14.8°C) can threaten life. Brief exposure to 55.4°F (13°C) waters is uneasy, and submersion below 50°F (10°C) can lead to cold shock and disrupted breathing patterns, varying by individual.
Daylight
In Deer Isle, the average length of the day in August is 13h and 58min.On the first day of the month, sunrise is at 5:23 am and sunset at 7:58 pm. On the last day of August, sunrise is at 5:57 am and sunset at 7:12 pm EDT.
Sunshine
The month with the most sunshine is August, with an average of 10.4h of sunshine.UV index
The months with the highest UV index are June through August, with an average maximum UV index of 5. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: In August, the maximum UV index of 5 suggests this advice:
Adopt protective measures - It is advised to guard against sun damage. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Deer Isle, ME
- Average high temperature in August: 68.9°F
The warmest month (with the highest average high temperature) is August (68.9°F).
The month with the lowest average high temperature is January (31.5°F).
- Average low temperature in August: 59.9°F
The month with the highest average low temperature is August (59.9°F).
The coldest month (with the lowest average low temperature) is January (21°F).
Average pressure in August
Deer Isle, ME
- Average pressure in August: 29.96"Hg
The month with the highest atmospheric pressure is September (30.04"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in August
Deer Isle, ME
- Average wind speed in August: 7.8mph
The windiest month (with the highest average wind speed) is January (14.4mph).
The calmest months (with the lowest average wind speed) are July and August (7.8mph).
Average humidity in August
Deer Isle, ME
- Average humidity in August: 84%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is November (76%).
Average rainfall in August
Deer Isle, ME
- Average rainfall in August: 1.26"
The wettest month (with the highest rainfall) is October (2.09").
The driest month (with the least rainfall) is September (0.91").
Average rainfall days in August
Deer Isle, ME
- Average rainfall days in August: 10.2 days
The month with the highest number of rainy days is July (12.8 days).
The month with the least rainy days is February (5.3 days).
Average snowfall in August
Deer Isle, ME
- Average snowfall in August: 0"
The month with the highest snowfall is February (2.32").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in August
Deer Isle, ME
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (7.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average sea temperature in August
Deer Isle, ME
- Average sea temperature in August: 58.6°F
The best month for swimming (with the highest average sea temperature) is August (58.6°F).
The coldest month (with the lowest average sea temperature) is March (38.2°F).
Average daylight in August /
Average sunshine in August
Deer Isle, ME
- Average daylight in August: 14h and 0min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in August: 10h and 24min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 4h and 30min).
Average sunshine days in August
Deer Isle, ME
- Average sunshine days in August: 19.3 days
The month with the most sunshine days is September (19.9 days).
The month with the least sunshine days is July (15.4 days).
Average UV index in August
Deer Isle, ME
- Average UV index in August: 5
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in August
Deer Isle, ME
- Average cloud cover in August: 31
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 31).
Average visibility in August
Deer Isle, ME
- Average visibility in August: 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).
