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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, like December, is a freezing cold winter month in Grand Isle, Maine, with an average temperature fluctuating between 18°F (-7.8°C) and 2.8°F (-16.2°C). January is the month when Grand Isle experiences its coldest temperatures, averaging a high of 18°F (-7.8°C) and a low of 2.8°F (-16.2°C). Weather in January »
Weather in February
February, the last month of the winter in Grand Isle, is another freezing cold month, with temperature in the range of an average low of 3.6°F (-15.8°C) and an average high of 20.3°F (-6.5°C). The shift into February finds Grand Isle at an average high-temperature of a still subzero cold 20.3°F (-6.5°C), closely comparable to January's conditions. Weather in February »
Weather in March
March, the first month of the spring in Grand Isle, is still a freezing cold month, with temperature in the range of an average low of 11.7°F (-11.3°C) and an average high of 27.7°F (-2.4°C). The beginning of March marks a minor shift in the average high-temperature, moving from February's 20.3°F (-6.5°C) to a still freezing cold 27.7°F (-2.4°C). Weather in March »
Weather in April
April is an icy spring month in Grand Isle, Maine, with an average temperature ranging between min 26.1°F (-3.3°C) and max 40.8°F (4.9°C). As March transitions into April, Grand Isle sees a rise in the average high-temperature, moving from a freezing cold 27.7°F (-2.4°C) to an icy 40.8°F (4.9°C). Weather in April »
Weather in May
The last month of the spring, May, is a moderate month in Grand Isle, Maine, with temperature in the range of an average high of 58.8°F (14.9°C) and an average low of 39.6°F (4.2°C). With the onset of May, Grand Isle's average high-temperature experiences a noticeable rise, advancing from April's icy 40.8°F (4.9°C) to a moderate 58.8°F (14.9°C). Weather in May »
Weather in June
June, the first month of the summer in Grand Isle, is an enjoyable month, with an average temperature varying between 67.5°F (19.7°C) and 47.3°F (8.5°C). Grand Isle in June observes a minor temperature shift, with average high-temperatures adjusting from a refreshing 58.8°F (14.9°C) in May to a comfortable 67.5°F (19.7°C). Weather in June »
Weather in July
July is a moderately hot summer month in Grand Isle, Maine, with temperature in the range of an average low of 53.6°F (12°C) and an average high of 74.3°F (23.5°C). The warmest month is July, with an average high-temperature of 74.3°F (23.5°C) and an average low-temperature of 53.6°F (12°C). Weather in July »
Weather in August
August, the last month of the summer in Grand Isle, is also an agreeable month, with an average temperature ranging between min 52.7°F (11.5°C) and max 72.3°F (22.4°C). August's advent presents an average high-temperature of an agreeable 72.3°F (22.4°C), indicating a slight variation from the conditions of the previous month. Weather in August »
Weather in September
The first month of the autumn, September, is also an enjoyable month in Grand Isle, Maine, with an average temperature varying between 63.5°F (17.5°C) and 45.1°F (7.3°C). The beginning of September subtly marks a decrease in the average high-temperature, transitioning from an agreeable 72.3°F (22.4°C) in August to a refreshing 63.5°F (17.5°C). Weather in September »
Weather in October
October, the same as September, in Grand Isle, Maine, is a frosty autumn month, with temperature in the range of an average high of 49.5°F (9.7°C) and an average low of 36°F (2.2°C). In Grand Isle, the beginning of October is marked by a lowered average high-temperature, shifting from September's enjoyable 63.5°F (17.5°C) to a chilly 49.5°F (9.7°C). Weather in October »
Weather in November
November, the last month of the autumn in Grand Isle, is another cold month, with temperature in the range of an average low of 25.2°F (-3.8°C) and an average high of 36.5°F (2.5°C). The arrival of November signals a shift in temperature, down from a frosty 49.5°F (9.7°C) in October to an icy 36.5°F (2.5°C). Weather in November »
Weather in December
The first month of the winter, December, is also a subzero cold month in Grand Isle, Maine, with an average temperature ranging between max 23.9°F (-4.5°C) and min 12.2°F (-11°C). December's arrival correlates with a reduction in the average high-temperature, down from a wintry 36.5°F (2.5°C) in November to a freezing cold 23.9°F (-4.5°C). Weather in December »
[Resources]Frequently asked questions
What is the coldest time of year in Grand Isle?
Grand Isle's coldest temperatures are experienced in January, with average high temperatures of 18°F (-7.8°C) and lows of 2.8°F (-16.2°C).
How much does it rain in Grand Isle?
Throughout the year, in Grand Isle, Maine, there are 140.8 rainfall days, and 30.12" (765mm) of precipitation is accumulated.
When does it snow in Grand Isle?
January through May, October through December are months with snowfall.
When does it snow the most in Grand Isle?
January is the month with the most snowfall in Grand Isle. Snow falls for 21.3 days and accumulates 14.92" (379mm) of snow.
How much does it snow in Grand Isle?
In Grand Isle, Maine, during the entire year, snow falls for 107.8 days and aggregates up to 71.34" (1812mm) of snow.
What are the months with the lowest UV index in Grand Isle?
January through March, November and December, with an average maximum UV index of 1, are months with the lowest UV index.
What is the driest month in Grand Isle?
February is the month with the least rainfall in Grand Isle, Maine. Rain falls for 4.3 days and accumulates 1.97" (50mm) of precipitation.
What is the month with the least sunshine in Grand Isle?
With an average of 2.1h of sunshine, February has the least sunshine of the year.
What is the most humid month in Grand Isle?
The most humid month in Grand Isle is March, with an average relative humidity of 94%.
When is Daylight Saving Time (DST) in Grand Isle?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
What is the wettest month in Grand Isle?
The month with the most rainfall in Grand Isle, Maine, is April, when the rain falls for 14 days and typically aggregates up to 2.95" (75mm) of precipitation.
What is the least humid month in Grand Isle?
The least humid month in Grand Isle, Maine, is May, with an average relative humidity of 76%.
When it does not snow in Grand Isle?
In Grand Isle, snow does not fall in June through September.
When are the longest days in Grand Isle?
June has the longest days of the year, with an average of 15h and 54min of daylight.
What are the months with the highest UV index in Grand Isle?
The months with the highest UV index in Grand Isle, Maine, are June and July, with an average maximum UV index of 5.
What are the warmest months in Grand Isle?
July, with its average high-temperature of 74.3°F (23.5°C) and an average low-temperature of 53.6°F (12°C), holds the record as the warmest month in Grand Isle, Maine.
What month has the most sunshine in Grand Isle?
With an average of 9.5h of sunshine, August has the most sunshine of the year.
What is the month with the shortest days in Grand Isle?
With an average of 8h and 30min of daylight, December has the shortest days of the year.
Average temperature
Grand Isle, ME
The warmest month (with the highest average high temperature) is July (74.3°F).
The month with the lowest average high temperature is January (18°F).
The month with the highest average low temperature is July (53.6°F).
The coldest month (with the lowest average low temperature) is January (2.8°F).
Average pressure
Grand Isle, ME
- Average pressure in January:
29.94"Hg - Average pressure in February:
29.94"Hg - Average pressure in March:
30.01"Hg - Average pressure in April:
29.94"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.88"Hg
- Average pressure in July:
29.89"Hg - Average pressure in August:
29.92"Hg - Average pressure in September:
30.01"Hg - Average pressure in October:
29.97"Hg - Average pressure in November:
30.01"Hg - Average pressure in December:
30"Hg
The months with the highest atmospheric pressure are March, September and November (30.01"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed
Grand Isle, ME
- Average wind speed in January:
8.2mph - Average wind speed in February:
8.2mph - Average wind speed in March:
8.1mph - Average wind speed in April:
7.9mph - Average wind speed in May:
7.5mph - Average wind speed in June:
6.8mph
- Average wind speed in July:
6.6mph - Average wind speed in August:
6.4mph - Average wind speed in September:
6.8mph - Average wind speed in October:
7.5mph - Average wind speed in November:
8mph - Average wind speed in December:
7.7mph
The windiest months (with the highest average wind speed) are January and February (8.2mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity
Grand Isle, ME
The month with the highest relative humidity is March (94%).
The month with the lowest relative humidity is May (76%).
Average rainfall
Grand Isle, ME
- Average rainfall in January:
2.48" - Average rainfall in February:
1.97" - Average rainfall in March:
2.44" - Average rainfall in April:
2.95" - Average rainfall in May:
2.76" - Average rainfall in June:
2.52"
- Average rainfall in July:
2.64" - Average rainfall in August:
2.32" - Average rainfall in September:
2.05" - Average rainfall in October:
2.76" - Average rainfall in November:
2.48" - Average rainfall in December:
2.76"
The wettest month (with the highest rainfall) is April (2.95").
The driest month (with the least rainfall) is February (1.97").
Average rainfall days
Grand Isle, ME
- Average rainfall days in January:
4.3 days - Average rainfall days in February:
4.3 days - Average rainfall days in March:
6.8 days - Average rainfall days in April:
14 days - Average rainfall days in May:
16.6 days - Average rainfall days in June:
15.9 days
- Average rainfall days in July:
17.1 days - Average rainfall days in August:
16.2 days - Average rainfall days in September:
13.1 days - Average rainfall days in October:
14.6 days - Average rainfall days in November:
10.1 days - Average rainfall days in December:
7.8 days
The month with the highest number of rainy days is July (17.1 days).
The months with the least rainy days are January and February (4.3 days).
Average snowfall
Grand Isle, ME
- Average snowfall in January:
14.92" - Average snowfall in February:
12.36" - Average snowfall in March:
13.62" - Average snowfall in April:
7.95" - Average snowfall in May:
0.87" - Average snowfall in June:
0"
The month with the highest snowfall is January (14.92").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Grand Isle, ME
- Average snowfall days in January:
21.3 days - Average snowfall days in February:
20.6 days - Average snowfall days in March:
20.4 days - Average snowfall days in April:
12.3 days - Average snowfall days in May:
1.2 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
3.3 days - Average snowfall days in November:
10.9 days - Average snowfall days in December:
17.8 days
The month with the highest number of snowfall days is January (21.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Grand Isle, ME
- Average daylight in January:
9h and 0min - Average daylight in February:
10h and 2min - Average daylight in March:
11h and 5min - Average daylight in April:
13h and 4min - Average daylight in May:
15h and 1min - Average daylight in June:
15h and 5min
- Average daylight in July:
15h and 3min - Average daylight in August:
14h and 1min - Average daylight in September:
12h and 3min - Average daylight in October:
10h and 5min - Average daylight in November:
9h and 2min - Average daylight in December:
8h and 3min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in January:
2h and 3min - Average sunshine in February:
2h and 1min - Average sunshine in March:
3h and 0min - Average sunshine in April:
5h and 1min - Average sunshine in May:
7h and 4min - Average sunshine in June:
8h and 2min
- Average sunshine in July:
9h and 2min - Average sunshine in August:
9h and 3min - Average sunshine in September:
7h and 2min - Average sunshine in October:
5h and 2min - Average sunshine in November:
4h and 0min - Average sunshine in December:
2h and 5min
The month with the most sunshine is August (Average sunshine: 9h and 30min).
The month with the least sunshine is February (Average sunshine: 2h and 6min).
Average sunshine days
Grand Isle, ME
- Average sunshine days in January:
10.3 days - Average sunshine days in February:
8.6 days - Average sunshine days in March:
8.8 days - Average sunshine days in April:
7.9 days - Average sunshine days in May:
12.1 days - Average sunshine days in June:
12.7 days
- Average sunshine days in July:
12.1 days - Average sunshine days in August:
13 days - Average sunshine days in September:
14.5 days - Average sunshine days in October:
12.5 days - Average sunshine days in November:
12.2 days - Average sunshine days in December:
11.5 days
The month with the most sunshine days is September (14.5 days).
The month with the least sunshine days is April (7.9 days).
Average UV index
Grand Isle, ME
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 1).
Average cloud cover
Grand Isle, ME
The month with the most cloud cover is February (Cloud cover 75).
The month with the least cloud cover is July (Cloud cover 42).
Average visibility
Grand Isle, ME
The months with the highest visibility are May, June, July, August, September, October and November (5mi).
The months with the lowest visibility are January, February, March, April and December (4mi).
Grand Isle, Maine, USA
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