Climate and monthly weather forecastDarien, CT
Climate and monthly weather forecast
Weather in January
January, the same as December, is another cold winter month in Darien, Connecticut, with an average temperature varying between 36.1°F (2.3°C) and 26.4°F (-3.1°C). January, marked by an average high-temperature of 36.1°F (2.3°C) and a low-temperature of 26.4°F (-3.1°C), is the coldest month. Weather in January »Weather in February
February, the last month of the winter in Darien, is another cold month, with temperature in the range of an average high of 38.3°F (3.5°C) and an average low of 27.9°F (-2.3°C). The average high-temperature during February registers at a still icy 38.3°F (3.5°C), closely corresponding to the preceding month. Weather in February »Weather in March
The first month of the spring, March, is a frosty month in Darien, Connecticut, with an average temperature varying between 34.2°F (1.2°C) and 44.6°F (7°C). With the beginning of March, Darien's average high-temperature sees a minor increase, transitioning from a wintry 38.3°F (3.5°C) in February to a frosty 44.6°F (7°C). Weather in March »Weather in April
April in Darien, Connecticut, is a moderate spring month, with an average temperature varying between 43.3°F (6.3°C) and 55.4°F (13°C). April brings a rise in Darien's average high-temperature, moving from a frosty 44.6°F (7°C) in March to a moderate 55.4°F (13°C). Weather in April »Weather in May
The last month of the spring, May, is an enjoyable month in Darien, Connecticut, with an average temperature varying between 53.1°F (11.7°C) and 65.8°F (18.8°C). The start of May brings a rise in the average high-temperature, moving from a mild 55.4°F (13°C) in April to a still refreshing 65.8°F (18.8°C). Weather in May »Weather in June
The first month of the summer, June, is a moderately hot month in Darien, Connecticut, with an average temperature varying between 61.3°F (16.3°C) and 74.1°F (23.4°C). June's onset witnesses a minor shift in the average high-temperature, moving from a comfortable 65.8°F (18.8°C) in May to a warm 74.1°F (23.4°C). Weather in June »Weather in July
July, the same as June, is another warm summer month in Darien, Connecticut, with an average temperature ranging between min 68.9°F (20.5°C) and max 81.3°F (27.4°C). In Darien, July is the month with the highest recorded average temperatures, measuring a high of 81.3°F (27.4°C) and a low of 68.9°F (20.5°C). The average heat index in July is estimated at a tropical 86°F (30°C). Weather in July »Weather in August
The last month of the summer, August, is also a moderately hot month in Darien, Connecticut, with an average temperature ranging between max 80.4°F (26.9°C) and min 68.5°F (20.3°C). August's onset records an average high-temperature of a still moderately hot 80.4°F (26.9°C), a near match to July's 81.3°F (27.4°C). Weather in August »Weather in September
The first month of the autumn, September, is still a pleasant month in Darien, Connecticut, with temperature in the range of an average low of 62.1°F (16.7°C) and an average high of 73.2°F (22.9°C). September witnesses a gentle descent in average high-temperature, descending from August's moderately hot 80.4°F (26.9°C) to a pleasant 73.2°F (22.9°C). Weather in September »Weather in October
October, the same as September, is another refreshing autumn month in Darien, Connecticut, with an average temperature fluctuating between 52.3°F (11.3°C) and 62.2°F (16.8°C). In Darien, the beginning of October is marked by a lowered average high-temperature, shifting from September's pleasant 73.2°F (22.9°C) to a comfortable 62.2°F (16.8°C). Weather in October »Weather in November
The last month of the autumn, November, is also a fresh month in Darien, Connecticut, with temperature in the range of an average low of 40.8°F (4.9°C) and an average high of 50.9°F (10.5°C). November's arrival coincides with a drop in the average high-temperature, decreasing from October's enjoyable 62.2°F (16.8°C) to a fresh 50.9°F (10.5°C). Weather in November »Weather in December
December, the first month of the winter in Darien, is also a wintry month, with an average temperature varying between 33.3°F (0.7°C) and 41.9°F (5.5°C). December brings a minor decrease, with the average high-temperature reducing from a cool 50.9°F (10.5°C) in November to a wintry 41.9°F (5.5°C). Weather in December »Updated: Jul 2, 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
Darien experiences its average lowest temperatures in January, reaching a peak of 36.1°F (2.3°C) and a minimum of 26.4°F (-3.1°C).
The month with the least rainfall is January, when the rain falls for 8.8 days and typically collects 2.48" (63mm) of precipitation.
Throughout the year, there are 166.4 rainfall days, and 38.7" (983mm) of precipitation is accumulated.
Months with snowfall are January through April, November and December.
In Darien, during the entire year, snow falls for 25.7 days and aggregates up to 9.09" (231mm) of snow.
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
February is the month with the most snowfall. Snow falls for 7.8 days and accumulates 2.64" (67mm) of snow.
February has the least sunshine of the year, with an average of 4.6h of sunshine.
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.
April, August and November, with an average relative humidity of 72%, are the least humid months.
With an average relative humidity of 76%, May is the most humid month.
In Darien, snow does not fall in May through October.
With an average of 15h and 6min of daylight, June has the longest days of the year.
June through August, with an average maximum UV index of 6, are months with the highest UV index.
July tends to be the warmest month, with temperatures averaging a daily high of 81.3°F (27.4°C) and a low of 68.9°F (20.5°C).
The months with the most rainfall are July and December, with an average 4.17" (106mm) of precipitation.
The month with the most sunshine is July, with an average of 10.4h of sunshine.
The month with the shortest days in Darien is December, with an average of 9h and 18min of daylight.
Average temperature
Darien, CT
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (36.1°F).
The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (26.4°F).
Average pressure
Darien, CT
- Average pressure in January:
30.05"Hg - Average pressure in February:
30.03"Hg - Average pressure in March:
30.05"Hg - Average pressure in April:
29.98"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.05"Hg - Average pressure in October:
30.02"Hg - Average pressure in November:
30.1"Hg - Average pressure in December:
30.06"Hg
The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
Darien, CT
- Average wind speed in January:
10.3mph - Average wind speed in February:
9.9mph - Average wind speed in March:
9.9mph - Average wind speed in April:
9.3mph - Average wind speed in May:
7.6mph - Average wind speed in June:
7.1mph
- Average wind speed in July:
6.6mph - Average wind speed in August:
6.8mph - Average wind speed in September:
7.6mph - Average wind speed in October:
9.1mph - Average wind speed in November:
9.6mph - Average wind speed in December:
9.9mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).
Average humidity
Darien, CT
The month with the highest relative humidity is May (76%).
The months with the lowest relative humidity are April, August and November (72%).
Average rainfall
Darien, CT
- Average rainfall in January:
2.48" - Average rainfall in February:
2.52" - Average rainfall in March:
3.03" - Average rainfall in April:
3.19" - Average rainfall in May:
3.19" - Average rainfall in June:
3.31"
- Average rainfall in July:
4.17" - Average rainfall in August:
3.46" - Average rainfall in September:
2.76" - Average rainfall in October:
3.54" - Average rainfall in November:
2.87" - Average rainfall in December:
4.17"
The wettest months (with the highest rainfall) are July and December (4.17").
The driest month (with the least rainfall) is January (2.48").
Average rainfall days
Darien, CT
- Average rainfall days in January:
8.8 days - Average rainfall days in February:
10.8 days - Average rainfall days in March:
12.8 days - Average rainfall days in April:
15.9 days - Average rainfall days in May:
17.3 days - Average rainfall days in June:
17 days
- Average rainfall days in July:
17 days - Average rainfall days in August:
16.4 days - Average rainfall days in September:
13.1 days - Average rainfall days in October:
14.3 days - Average rainfall days in November:
10.6 days - Average rainfall days in December:
12.4 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (8.8 days).
Average snowfall
Darien, CT
The month with the highest snowfall is February (2.64").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Darien, CT
- Average snowfall days in January:
7.1 days - Average snowfall days in February:
7.8 days - Average snowfall days in March:
5 days - Average snowfall days in April:
0.5 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:
0.1 days - Average snowfall days in November:
0.9 days - Average snowfall days in December:
4.2 days
The month with the highest number of snowfall days is February (7.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Darien, CT
- Average daylight in January:
9h and 36min - Average daylight in February:
10h and 42min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 30min - Average daylight in June:
15h and 6min
- Average daylight in July:
14h and 48min - Average daylight in August:
13h and 48min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 6min - Average daylight in November:
9h and 54min - Average daylight in December:
9h and 18min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January:
5h and 0min - Average sunshine in February:
4h and 36min - Average sunshine in March:
6h and 6min - Average sunshine in April:
8h and 18min - Average sunshine in May:
8h and 36min - Average sunshine in June:
9h and 30min
- Average sunshine in July:
10h and 24min - Average sunshine in August:
10h and 18min - Average sunshine in September:
8h and 48min - Average sunshine in October:
5h and 48min - Average sunshine in November:
5h and 36min - Average sunshine in December:
4h and 48min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days
Darien, CT
- Average sunshine days in January:
16.8 days - Average sunshine days in February:
12.7 days - Average sunshine days in March:
13.5 days - Average sunshine days in April:
11.9 days - Average sunshine days in May:
11.6 days - Average sunshine days in June:
10.8 days
- Average sunshine days in July:
11.9 days - Average sunshine days in August:
11.8 days - Average sunshine days in September:
14.7 days - Average sunshine days in October:
14.7 days - Average sunshine days in November:
17.3 days - Average sunshine days in December:
14.3 days
The month with the most sunshine days is November (17.3 days).
The month with the least sunshine days is June (10.8 days).
Average UV index
Darien, CT
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
Darien, CT
The month with the most cloud cover is December (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility
Darien, CT
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).
