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 sea temperature 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 is the coldest month, with an average high-temperature of 43.2°F (6.2°C) and an average low-temperature of 34.9°F (1.6°C).Humidity
The most humid month in Manchester is December, with an average relative humidity of 87%.Rainfall
The wettest months in Manchester are January and December, with an average 2.05" (52mm) of rainfall.Snowfall
January through March, November and December are months with snowfall in Manchester. In December, in Manchester, it is snowing for 1 days. Throughout December, 0.12" (3mm) of snow is accumulated. Throughout the year, there are 7 snowfall days, and 2.36" (60mm) of snow is accumulated.Ocean temperature
In Manchester, in December, the average water temperature is 46.6°F (8.1°C).Note: With an efficient thermal swimsuit, one can navigate 46.6°F (8.1°C) even if it's colder than 50°F (10°C); otherwise, rapid cold shock and breathlessness might set in. Barely wading at 55.4°F (13°C) feels chilly.
Daylight
With an average of 8h and 30min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:38 am and sunset at 4:20 pm. On the last day of the month, sunrise is at 7:58 am and sunset at 4:29 pm PST.
Sunshine
December has the least sunshine of the year in Manchester, with an average of 4.1h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for average individuals.Note: In December, the maximum UV index of 2 transforms into these recommendations:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Frequently asked questions
What are the coldest months in Manchester?
How cold is December in Manchester?
What is the most humid month in Manchester?
What is the average humidity in December in Manchester?
What is the wettest month in Manchester?
How many days does it rain in December in Manchester?
How many days does it snow in December in Manchester?
What is the water temperature in December in Manchester?
What is the month with the shortest days in Manchester?
How many hours of daylight does Manchester have in December?
What time are sunrise and sunset in December in Manchester?
What is the month with the least sunshine in Manchester?
How long on average sun shines in December in Manchester?
What are the months with the lowest UV index in Manchester?
What is the UV index intensity in December in Manchester?
Average temperature in December
Manchester, WA
- Average high temperature in December: 43.2°F
The warmest month (with the highest average high temperature) is August (77.2°F).
The month with the lowest average high temperature is December (43.2°F).
- Average low temperature in December: 34.9°F
The month with the highest average low temperature is August (53.6°F).
The coldest month (with the lowest average low temperature) is December (34.9°F).
Average pressure in December
Manchester, WA
- Average pressure in December: 30.07"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.01"Hg).
Average wind speed in December
Manchester, WA
- Average wind speed in December: 4.7mph
The windiest month (with the highest average wind speed) is March (5.5mph).
The calmest months (with the lowest average wind speed) are July and August (3.5mph).
Average humidity in December
Manchester, WA
- Average humidity in December: 87%
The month with the highest relative humidity is December (87%).
The month with the lowest relative humidity is July (69%).
Average rainfall in December
Manchester, WA
- Average rainfall in December: 2.05"
The wettest months (with the highest rainfall) are January and December (2.05").
The driest month (with the least rainfall) is July (0.28").
Average rainfall days in December
Manchester, WA
- Average rainfall days in December: 14.3 days
The month with the highest number of rainy days is March (15.3 days).
The month with the least rainy days is August (5.4 days).
Average snowfall in December
Manchester, WA
- Average snowfall in December: 0.12"
The month with the highest snowfall is February (1.22").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Manchester, WA
- Average snowfall days in December: 1 days
The month with the highest number of snowfall days is February (2.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in December
Manchester, WA
- Average sea temperature in December: 46.6°F
The best month for swimming (with the highest average sea temperature) is August (53.2°F).
The coldest month (with the lowest average sea temperature) is February (45.3°F).
Average daylight in December /
Average sunshine in December
Manchester, WA
- 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 December: 4h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 6min).
Average sunshine days in December
Manchester, WA
- Average sunshine days in December: 13.8 days
The month with the most sunshine days is August (22.8 days).
The month with the least sunshine days is February (11.8 days).
Average UV index in December
Manchester, WA
- Average UV index in December: 2
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Manchester, WA
- Average cloud cover in December: 58
The month with the most cloud cover is December (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in December
Manchester, WA
- Average visibility in December: 5mi
The months with the highest visibility are May, June, July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, October, November and December (5mi).
Manchester, Washington, USA
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