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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 sea temperature
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, the same as December, in Sullivan, Maine, is another subzero cold winter month, with an average temperature ranging between max 29.7°F (-1.3°C) and min 18.5°F (-7.5°C). Temperature records mark January as the coldest month, with highs averaging 29.7°F (-1.3°C) and lows at 18.5°F (-7.5°C). Weather in January »
Weather in February
The last month of the winter, February, is also a subzero cold month in Sullivan, Maine, with temperature in the range of an average low of 18.9°F (-7.3°C) and an average high of 30.7°F (-0.7°C). Upon the onset of February, Sullivan witnesses an average high-temperature of a still subzero cold 30.7°F (-0.7°C), showing a close resemblance to the prior month. Weather in February »
Weather in March
The first month of the spring, March, is a cold month in Sullivan, Maine, with an average temperature varying between 37.2°F (2.9°C) and 25.9°F (-3.4°C). March comes with a subtle rise, with the average high-temperature adjusting from a subzero cold 30.7°F (-0.7°C) in February to a cold 37.2°F (2.9°C). Weather in March »
Weather in April
April is a frosty spring month in Sullivan, Maine, with an average temperature fluctuating between 48.6°F (9.2°C) and 35.6°F (2°C). April brings a temperature increase, with average high-temperatures moving from March's icy 37.2°F (2.9°C) to a chilly 48.6°F (9.2°C). Weather in April »
Weather in May
The last month of the spring, May, is a refreshing month in Sullivan, Maine, with temperature in the range of an average high of 58.6°F (14.8°C) and an average low of 44.2°F (6.8°C). In Sullivan, stepping into May brings a temperature increase, moving up from April's frosty 48.6°F (9.2°C) to a refreshing 58.6°F (14.8°C). Weather in May »
Weather in June
June, the first month of the summer in Sullivan, is a refreshing month, with an average temperature varying between 66°F (18.9°C) and 51.4°F (10.8°C). The shift from May to June is marked by a slight increase in the average high-temperature, moving from a moderate 58.6°F (14.8°C) to a still refreshing 66°F (18.9°C). Weather in June »
Weather in July
July is an agreeable summer month in Sullivan, Maine, with an average temperature varying between 58.1°F (14.5°C) and 73.2°F (22.9°C). July comes with a subtle rise, with the average high-temperature adjusting from an enjoyable 66°F (18.9°C) in June to a pleasant 73.2°F (22.9°C). Weather in July »
Weather in August
August, the last month of the summer in Sullivan, is a moderately hot month, with an average temperature varying between 57.7°F (14.3°C) and 73.4°F (23°C). Sullivan's temperatures tend to reach their peak averages in August, with a high of 73.4°F (23°C) and a low of 57.7°F (14.3°C). Weather in August »
Weather in September
The first month of the autumn, September, is also an enjoyable month in Sullivan, Maine, with temperature in the range of an average high of 67.1°F (19.5°C) and an average low of 52.7°F (11.5°C). The shift from August to September includes a minor decrease in the average high-temperature, lightly dropping from a warm 73.4°F (23°C) to a comfortable 67.1°F (19.5°C). Weather in September »
Weather in October
October, like September, is another refreshing autumn month in Sullivan, Maine, with an average temperature ranging between max 55.9°F (13.3°C) and min 45°F (7.2°C). Sullivan's October weather shows a moderate shift in high-temperatures, falling from September's comfortable 67.1°F (19.5°C) to a moderate 55.9°F (13.3°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a frosty month in Sullivan, Maine, with an average temperature fluctuating between 44.8°F (7.1°C) and 34.7°F (1.5°C). As October transitions to November, the average high-temperature falls from a moderate 55.9°F (13.3°C) to a frosty 44.8°F (7.1°C). Weather in November »
Weather in December
December, the first month of the winter in Sullivan, is also a wintry month, with temperature in the range of an average low of 25.7°F (-3.5°C) and an average high of 35.1°F (1.7°C). The onset of December is marked by a decrease in temperature, transitioning from a chilly 44.8°F (7.1°C) in November to a wintry 35.1°F (1.7°C). Weather in December »
Updated: Jul 17, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the coldest?
With an average high-temperature of 29.7°F (-1.3°C) and an average low-temperature of 18.5°F (-7.5°C), January is the coldest month.
How much does it rain?
In Sullivan, during the entire year, the rain falls for 142.1 days and collects up to 32.28" (820mm) of precipitation.
When does it snow?
January through May, October through December are months with snowfall.
How much does it snow?
In Sullivan, during the entire year, snow falls for 48.1 days and aggregates up to 23.82" (605mm) of snow.
What are the months with the lowest UV index?
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
What is the most humid month?
With an average relative humidity of 83%, February is the most humid month.
When does it snow the most?
February is the month with the most snowfall. Snow falls for 11.4 days and accumulates 5.75" (146mm) of snow.
What is the month with the least sunshine?
The month with the least sunshine in Sullivan is February, with an average of 4.1h of sunshine.
What is the month with the coldest ocean?
The month with the coldest seawater is March, with an average ocean temperature of 37.9°F (3.3°C).
When is Daylight Saving Time (DST)?
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.
When it does not snow?
June through September are months without snowfall.
When are the longest days?
With an average of 15h and 30min of daylight, June has the longest days of the year.
What is the month with the highest UV index?
June through August, with an average maximum UV index of 5, are months with the highest UV index.
What is the driest month?
The month with the least rainfall is July, when the rain falls for 13 days and typically collects 1.57" (40mm) of precipitation.
What month is the hottest?
Sullivan reaches its average highest temperatures in August, measuring 73.4°F (23°C) at the peak and 57.7°F (14.3°C) at the lowest.
When is the ocean warmest?
With an average ocean temperature of 56.8°F (13.8°C), August is the month with the warmest seawater.
What month has the most sunshine?
With an average of 10.1h of sunshine, August has the most sunshine of the year.
What is the least humid month?
November is the least humid month, with an average relative humidity of 76%.
What is the rainiest month?
December is the month with the most rainfall. Rain falls for 11.5 days and accumulates 3.94" (100mm) of precipitation.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 8h and 54min of daylight.
Average temperature
Sullivan, ME
The warmest month (with the highest average high temperature) is August (73.4°F).
The month with the lowest average high temperature is January (29.7°F).
The month with the highest average low temperature is July (58.1°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).
Average pressure
Sullivan, ME
- Average pressure in January:
29.95"Hg - Average pressure in February:
29.94"Hg - Average pressure in March:
30"Hg - Average pressure in April:
29.95"Hg - Average pressure in May:
29.99"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.93"Hg - Average pressure in August:
29.96"Hg - Average pressure in September:
30.04"Hg - Average pressure in October:
29.99"Hg - Average pressure in November:
30.02"Hg - Average pressure in December:
29.99"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
Sullivan, ME
- Average wind speed in January:
10.4mph - Average wind speed in February:
10.3mph - Average wind speed in March:
10.3mph - Average wind speed in April:
9.2mph - Average wind speed in May:
7.6mph - Average wind speed in June:
7.1mph
- Average wind speed in July:
6.3mph - Average wind speed in August:
6.3mph - Average wind speed in September:
7.1mph - Average wind speed in October:
8.9mph - Average wind speed in November:
9.5mph - Average wind speed in December:
10.1mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity
Sullivan, ME
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is November (76%).
Average rainfall
Sullivan, ME
- Average rainfall in January:
3.19" - Average rainfall in February:
2.52" - Average rainfall in March:
2.44" - Average rainfall in April:
3.5" - Average rainfall in May:
2.28" - Average rainfall in June:
2.6"
- Average rainfall in July:
1.57" - Average rainfall in August:
1.73" - Average rainfall in September:
1.81" - Average rainfall in October:
3.35" - Average rainfall in November:
3.35" - Average rainfall in December:
3.94"
The wettest month (with the highest rainfall) is December (3.94").
The driest month (with the least rainfall) is July (1.57").
Average rainfall days
Sullivan, ME
- Average rainfall days in January:
8.1 days - Average rainfall days in February:
7.5 days - Average rainfall days in March:
11.3 days - Average rainfall days in April:
15.5 days - Average rainfall days in May:
14.8 days - Average rainfall days in June:
13.8 days
- Average rainfall days in July:
13 days - Average rainfall days in August:
10.4 days - Average rainfall days in September:
10.5 days - Average rainfall days in October:
14 days - Average rainfall days in November:
11.7 days - Average rainfall days in December:
11.5 days
The month with the highest number of rainy days is April (15.5 days).
The month with the least rainy days is February (7.5 days).
Average snowfall
Sullivan, ME
- Average snowfall in January:
5.31" - Average snowfall in February:
5.75" - Average snowfall in March:
4.13" - Average snowfall in April:
2.44" - Average snowfall in May:
0.08" - Average snowfall in June:
0"
The month with the highest snowfall is February (5.75").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Sullivan, ME
- Average snowfall days in January:
11.8 days - Average snowfall days in February:
11.4 days - Average snowfall days in March:
9.4 days - Average snowfall days in April:
3.1 days - Average snowfall days in May:
0.1 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:
0.3 days - Average snowfall days in November:
4.1 days - Average snowfall days in December:
7.9 days
The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature
Sullivan, ME
The best month for swimming (with the highest average sea temperature) is August (56.8°F).
The coldest month (with the lowest average sea temperature) is March (38°F).
Average daylight / Average sunshine
Sullivan, ME
- Average daylight in January:
9h and 2min - Average daylight in February:
10h and 3min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 3min - Average daylight in May:
14h and 5min - Average daylight in June:
15h and 3min
- Average daylight in July:
15h and 1min - Average daylight in August:
14h and 0min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 4min - Average daylight in December:
8h and 5min
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 January:
4h and 3min - Average sunshine in February:
4h and 1min - Average sunshine in March:
5h and 1min - Average sunshine in April:
7h and 1min - Average sunshine in May:
7h and 5min - Average sunshine in June:
8h and 4min
- Average sunshine in July:
9h and 4min - Average sunshine in August:
10h and 1min - Average sunshine in September:
8h and 1min - Average sunshine in October:
6h and 2min - Average sunshine in November:
5h and 1min - Average sunshine in December:
4h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 6min).
Average sunshine days
Sullivan, ME
- Average sunshine days in January:
14.4 days - Average sunshine days in February:
12.4 days - Average sunshine days in March:
14.3 days - Average sunshine days in April:
11.2 days - Average sunshine days in May:
14.5 days - Average sunshine days in June:
14.3 days
- Average sunshine days in July:
16.6 days - Average sunshine days in August:
18.7 days - Average sunshine days in September:
17.5 days - Average sunshine days in October:
14.5 days - Average sunshine days in November:
15.7 days - Average sunshine days in December:
14.1 days
The month with the most sunshine days is August (18.7 days).
The month with the least sunshine days is April (11.2 days).
Average UV index
Sullivan, ME
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
Sullivan, ME
The month with the most cloud cover is February (Cloud cover 56).
The months with the least cloud cover are August and September (Cloud cover 35).
Average visibility
Sullivan, ME
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Sullivan, Maine, USA
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