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
In Lummi Island, the lowest average temperatures are observed in December, with a high of 41.9°F (5.5°C) and a low of 35.4°F (1.9°C).Humidity
In December, the average relative humidity is 82%.Rainfall
In December, the rain falls for 18.3 days. Throughout December, 4.76" (121mm) of precipitation is accumulated. In Lummi Island, Washington, during the entire year, the rain falls for 178.6 days and collects up to 37.32" (948mm) of precipitation.Snowfall
January through April, November and December are months with snowfall in Lummi Island, Washington. In Lummi Island, in December, during 1.8 snowfall days, 0.59" (15mm) of snow is typically accumulated. In Lummi Island, Washington, during the entire year, snow falls for 10.7 days and aggregates up to 6.57" (167mm) of snow.Daylight
The month with the shortest days is December, with an average of 8h and 24min of daylight.On the first day of the month, sunrise is at 7:43 am and sunset at 4:16 pm. On the last day of December, in Lummi Island, sunrise is at 8:03 am and sunset at 4:24 pm PST.
Sunshine
January and December, with an average of 4.2h of sunshine, are months with the least sunshine in Lummi Island.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index of 2 in December converts into the following recommendations:
In contrast to children, who must always be shielded from the sun, most people can tolerate up to an hour of sun exposure without any burns. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. To cut down UV radiation exposure by about half, sport a wide-brim hat. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Frequently asked questions
What are the coldest months in Lummi Island?
How cold is it in Lummi Island in December?
What is the average humidity in December in Lummi Island?
How many days does it rain in December in Lummi Island?
How much does it snow in Lummi Island in December?
What is the month with the shortest days in Lummi Island?
How many hours of daylight does Lummi Island have in December?
What time are sunrise and sunset in December in Lummi Island?
What is the month with the least sunshine in Lummi Island?
How long on average sun shines in December in Lummi Island?
What are the months with the lowest UV index in Lummi Island?
What is the UV index reading in December in Lummi Island?
Average temperature in December
Lummi Island, WA
- Average high temperature in December: 41.9°F
The warmest month (with the highest average high temperature) is August (71.1°F).
The month with the lowest average high temperature is December (41.9°F).
- Average low temperature in December: 35.4°F
The month with the highest average low temperature is August (53.8°F).
The coldest month (with the lowest average low temperature) is February (35.2°F).
Average pressure in December
Lummi Island, WA
- Average pressure in December: 30.07"Hg
The month with the highest atmospheric pressure is January (30.08"Hg).
The month with the lowest atmospheric pressure is March (30"Hg).
Average wind speed in December
Lummi Island, WA
- Average wind speed in December: 6.1mph
The windiest month (with the highest average wind speed) is November (6.2mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity in December
Lummi Island, WA
- Average humidity in December: 82%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is July (74%).
Average rainfall in December
Lummi Island, WA
- Average rainfall in December: 4.76"
The wettest month (with the highest rainfall) is November (5.71").
The driest month (with the least rainfall) is July (0.67").
Average rainfall days in December
Lummi Island, WA
- Average rainfall days in December: 18.3 days
The month with the highest number of rainy days is November (20.1 days).
The month with the least rainy days is August (7.3 days).
Average snowfall in December
Lummi Island, WA
- Average snowfall in December: 0.59"
The month with the highest snowfall is February (2.56").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Lummi Island, WA
- Average snowfall days in December: 1.8 days
The month with the highest number of snowfall days is February (3.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Lummi Island, WA
- Average daylight in December: 8h and 2min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in December: 4h and 1min
The months with the most sunshine are July and August (Average sunshine: 10h and 30min).
The months with the least sunshine are January and December (Average sunshine: 4h and 12min).
Average sunshine days in December
Lummi Island, WA
- Average sunshine days in December: 11.2 days
The month with the most sunshine days is August (21.9 days).
The month with the least sunshine days is November (8.5 days).
Average UV index in December
Lummi Island, WA
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Lummi Island, WA
- Average cloud cover in December: 56
The months with the most cloud cover are January and December (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in December
Lummi Island, WA
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Lummi Island, Washington, USA
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