Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
December's onset brings a slight change in high-temperatures, falling from a fresh 50°F (10°C) in November to a cold 40.6°F (4.8°C). Throughout December, Haddam witnesses a nighttime temperature average of 30°F (-1.1°C).Humidity
The average relative humidity in December in Haddam is 76%.Rainfall
In December, the rain falls for 8.6 days. Throughout December, 1.14" (29mm) of precipitation is accumulated. Throughout the year, there are 109.9 rainfall days, and 11.14" (283mm) of precipitation is accumulated.Snowfall
January through May, November and December are months with snowfall in Haddam. In Haddam, during December, snow falls for 3.7 days and regularly aggregates up to 0.55" (14mm) of snow. In Haddam, during the entire year, snow falls for 19.9 days and aggregates up to 3.7" (94mm) of snow.Daylight
With an average of 9h and 12min of daylight, December has the shortest days of the year in Haddam.On the first day of the month, sunrise is at 6:57 am and sunset at 4:21 pm. On the last day of December, sunrise is at 7:16 am and sunset at 4:30 pm EST.
Sunshine
The average sunshine in December in Haddam is 4.6h.UV index
The months with the lowest UV index in Haddam are January through March, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: In December, an average UV index of 2 transforms into the following instructions:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. Avoiding the Sun during its peak radiation time around midday is a healthy practice. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Frequently asked questions
How cold does it get in Haddam in December?
What is the average humidity in December in Haddam?
How much does it rain in Haddam in December?
How many days does it snow in December in Haddam?
What is the month with the shortest days in Haddam?
What is the average length of the day in December in Haddam?
When is the sunrise / sunset in December in Haddam?
How many hours of sunshine does Haddam have in December?
What are the months with the lowest UV index in Haddam?
What is the UV index intensity in December in Haddam?
Average temperature in December
Haddam, CT
- Average high temperature in December: 40.6°F
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).
- Average low temperature in December: 30°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 in December
Haddam, CT
- 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 in December
Haddam, CT
- 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 in December
Haddam, CT
- Average humidity in December: 76%
The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is April (72%).
Average rainfall in December
Haddam, CT
- 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 in December
Haddam, CT
- 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 in December
Haddam, CT
- Average snowfall in December: 0.55"
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 in December
Haddam, CT
- 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 in December /
Average sunshine in December
Haddam, CT
- 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 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 in December
Haddam, CT
- 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 in December
Haddam, CT
- Average UV index in December: 2
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 in December
Haddam, CT
- Average cloud cover in December: 50
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 in December
Haddam, CT
- Average visibility in December: 6mi
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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