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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, in Haddam, Connecticut, is a wintry winter month, with an average temperature varying between 22.8°F (-5.1°C) and 34.7°F (1.5°C). January stands out as Haddam's coldest month, with an average high-temperature of 34.7°F (1.5°C) and a low-temperature of 22.8°F (-5.1°C). Weather in January »
Weather in February
February, the last month of the winter in Haddam, is also an icy month, with an average temperature ranging between min 23.4°F (-4.8°C) and max 37.8°F (3.2°C). The arrival of February brings an average high-temperature of a still icy 37.8°F (3.2°C), closely following the temperature pattern of January. Weather in February »
Weather in March
The first month of the spring, March, is a frosty month in Haddam, Connecticut, with an average temperature fluctuating between 30.6°F (-0.8°C) and 45°F (7.2°C). With the start of March, the average high-temperature marginally shifts from February's wintry 37.8°F (3.2°C) to a frosty 45°F (7.2°C). Weather in March »
Weather in April
April is a moderate spring month in Haddam, Connecticut, with an average temperature fluctuating between 40.3°F (4.6°C) and 56.7°F (13.7°C). April marks a rise in the average high-temperature, moving from March's frosty 45°F (7.2°C) to a moderate 56.7°F (13.7°C). Weather in April »
Weather in May
May, the last month of the spring in Haddam, is a pleasant month, with an average temperature fluctuating between 49.5°F (9.7°C) and 68°F (20°C). May's arrival sees a rise in the average high-temperature, jumping from April's moderate 56.7°F (13.7°C) to an agreeable 68°F (20°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Haddam, Connecticut, with temperature in the range of an average high of 75.7°F (24.3°C) and an average low of 57.2°F (14°C). As June sets, the average high-temperature shows a slight increase, moving up from an agreeable 68°F (20°C) in May to a warm 75.7°F (24.3°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Haddam, Connecticut, with an average temperature varying between 63.9°F (17.7°C) and 82.6°F (28.1°C). With average temperatures fluctuating between a high of 82.6°F (28.1°C) and a low of 63.9°F (17.7°C), July stands out as the warmest month. The average heat index in July is evaluated at a tropical 89.6°F (32°C). Weather in July »
Weather in August
August, the last month of the summer in Haddam, is also a moderately hot month, with an average temperature varying between 80.4°F (26.9°C) and 62.8°F (17.1°C). Haddam sees the arrival of August with an average high-temperature of a still warm 80.4°F (26.9°C), indicating a subtle variation from July. Weather in August »
Weather in September
September, the first month of the autumn in Haddam, is also a moderately hot month, with temperature in the range of an average high of 73.4°F (23°C) and an average low of 56.7°F (13.7°C). In Haddam, the average high-temperature in September slightly decreases from 80.4°F (26.9°C) in August to a still warm 73.4°F (23°C). Weather in September »
Weather in October
October, like September, in Haddam, Connecticut, is another enjoyable autumn month, with an average temperature ranging between max 61.7°F (16.5°C) and min 48°F (8.9°C). October's arrival comes with a decrease in the average high-temperature, moving from a moderately hot 73.4°F (23°C) in September to a comfortable 61.7°F (16.5°C). Weather in October »
Weather in November
November, the last month of the autumn in Haddam, is another cool month, with an average temperature varying between 37.6°F (3.1°C) and 50°F (10°C). Haddam's progression into November includes a drop in the average high-temperature, from a refreshing 61.7°F (16.5°C) in October to a cool 50°F (10°C). Weather in November »
Weather in December
The first month of the winter, December, is also an icy month in Haddam, Connecticut, with an average temperature fluctuating between 40.6°F (4.8°C) and 30°F (-1.1°C). The shift from November to December corresponds with a decrease in the average high-temperature, down to an icy 40.6°F (4.8°C) from a fresh 50°F (10°C). Weather in December »
Updated: Aug 29, 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 month is the coldest in Haddam?
January, characterized by an average high temperature of 34.7°F (1.5°C) and a low temperature of 22.8°F (-5.1°C), is generally the coldest month.
How much does it rain?
Throughout the year, there are 109.9 rainfall days, and 11.14" (283mm) of precipitation is accumulated.
When does it snow?
January through May, November and December are months with snowfall.
How much does it snow?
Throughout the year, there are 19.9 snowfall days, and 3.7" (94mm) of snow is accumulated.
What is the month with the lowest UV index in Haddam?
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2.
What is the most humid month?
The most humid month in Haddam is February, with an average relative humidity of 78%.
What is the month with the least sunshine?
With an average of 4.5h of sunshine, February has the least sunshine of the year.
When does it snow the most?
March is the month with the most snowfall. Snow falls for 4.9 days and accumulates 1.14" (29mm) of snow.
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.
What is the least humid month?
With an average relative humidity of 72%, April is the least humid month.
When it does not snow?
June through October are months without snowfall.
When are the longest days?
June has the longest days of the year, with an average of 15h and 6min of daylight.
What are the months with the highest UV index?
June through August, with an average maximum UV index of 6, are months with the highest UV index.
What time of the year is the hottest?
The warmest period in Haddam is July, when temperatures fluctuate between an average high of 82.6°F (28.1°C) and a low of 63.9°F (17.7°C).
What is the rainiest month?
July is the month with the most rainfall in Haddam. Rain falls for 12.7 days and accumulates 1.18" (30mm) of precipitation.
What are the months with the most sunshine?
July and August, with an average of 10.1h of sunshine, are months with the most sunshine.
What is the driest month?
The month with the least rainfall is September, when the rain falls for 8.5 days and typically collects 0.39" (10mm) of precipitation.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 12min of daylight.
Average temperature
Haddam, CT
The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (34.7°F).
The month with the highest average low temperature is July (63.9°F).
The coldest month (with the lowest average low temperature) is January (22.8°F).
Average pressure
Haddam, CT
- Average pressure in January:
30.03"Hg - Average pressure in February:
30.01"Hg - Average pressure in March:
30.04"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:
29.95"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.05"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.08"Hg - Average pressure in December:
30.05"Hg
The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
Haddam, CT
- Average wind speed in January:
8.6mph - Average wind speed in February:
8.4mph - Average wind speed in March:
8.6mph - Average wind speed in April:
8.2mph - Average wind speed in May:
6.8mph - Average wind speed in June:
6.2mph
- Average wind speed in July:
5.7mph - Average wind speed in August:
5.7mph - Average wind speed in September:
6.3mph - Average wind speed in October:
7.5mph - Average wind speed in November:
7.8mph - Average wind speed in December:
8.4mph
The windiest months (with the highest average wind speed) are January and March (8.6mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).
Average humidity
Haddam, CT
The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is April (72%).
Average rainfall
Haddam, CT
- Average rainfall in January:
0.75" - Average rainfall in February:
0.63" - Average rainfall in March:
0.75" - Average rainfall in April:
1.1" - Average rainfall in May:
0.91" - Average rainfall in June:
1.06"
- Average rainfall in July:
1.18" - Average rainfall in August:
1.02" - Average rainfall in September:
0.39" - Average rainfall in October:
1.06" - Average rainfall in November:
1.14" - Average rainfall in December:
1.14"
The wettest month (with the highest rainfall) is July (1.18").
The driest month (with the least rainfall) is September (0.39").
Average rainfall days
Haddam, CT
- Average rainfall days in January:
5.9 days - Average rainfall days in February:
6.4 days - Average rainfall days in March:
9.2 days - Average rainfall days in April:
10.6 days - Average rainfall days in May:
10.9 days - Average rainfall days in June:
9.8 days
- Average rainfall days in July:
12.7 days - Average rainfall days in August:
11.1 days - Average rainfall days in September:
8.5 days - Average rainfall days in October:
9.2 days - Average rainfall days in November:
7 days - Average rainfall days in December:
8.6 days
The month with the highest number of rainy days is July (12.7 days).
The month with the least rainy days is January (5.9 days).
Average snowfall
Haddam, CT
- Average snowfall in January:
0.67" - Average snowfall in February:
0.63" - Average snowfall in March:
1.14" - Average snowfall in April:
0.04" - Average snowfall in May:
0.35" - Average snowfall in June:
0"
The month with the highest snowfall is March (1.14").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days
Haddam, CT
- Average snowfall days in January:
4.6 days - Average snowfall days in February:
5.2 days - Average snowfall days in March:
4.9 days - Average snowfall days in April:
0.6 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 days - Average snowfall days in November:
0.8 days - Average snowfall days in December:
3.7 days
The month with the highest number of snowfall days is February (5.2 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight / Average sunshine
Haddam, CT
- Average daylight in January:
9h and 4min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 3min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 1min
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 12min).
- Average sunshine in January:
4h and 5min - Average sunshine in February:
4h and 3min - Average sunshine in March:
5h and 5min - Average sunshine in April:
8h and 0min - Average sunshine in May:
8h and 0min - Average sunshine in June:
9h and 0min
- Average sunshine in July:
10h and 1min - Average sunshine in August:
10h and 1min - Average sunshine in September:
8h and 2min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 4min
The months with the most sunshine are July and August (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days
Haddam, CT
- Average sunshine days in January:
20.2 days - Average sunshine days in February:
17.6 days - Average sunshine days in March:
17.2 days - Average sunshine days in April:
17.3 days - Average sunshine days in May:
17.9 days - Average sunshine days in June:
17.6 days
- Average sunshine days in July:
16.3 days - Average sunshine days in August:
16.9 days - Average sunshine days in September:
19.1 days - Average sunshine days in October:
19.5 days - Average sunshine days in November:
20.9 days - Average sunshine days in December:
19.2 days
The month with the most sunshine days is November (20.9 days).
The month with the least sunshine days is July (16.3 days).
Average UV index
Haddam, 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
Haddam, CT
The months with the most cloud cover are February and March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility
Haddam, CT
The months with the highest visibility are January, March, April, September, October, November and December (6mi).
The months with the lowest visibility are February, May, June, July and August (5mi).
Haddam, Connecticut, USA
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