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 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 Lafayette, the month of December registers the lowest temperatures, averaging 55.2°F (12.9°C) at the peak and 43.7°F (6.5°C) at the lowest.Humidity
In Lafayette, the average relative humidity in December is 71%.Rainfall
In Lafayette, California, in December, it is raining for 10.7 days, with typically 2.05" (52mm) of accumulated precipitation. In Lafayette, during the entire year, the rain falls for 74.4 days and collects up to 12.6" (320mm) of precipitation.Daylight
The month with the shortest days is December, with an average of 9h and 36min of daylight.On the first day of December in Lafayette, sunrise is at 7:06 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 4:59 pm PST.
Sunshine
December has the least sunshine of the year, with an average of 5.8h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Lafayette. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: A typical high UV index of 3 in December suggests the following recommendations:
Heed the precautions - Suggestions to avoid sunburn are made. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the coldest in Lafayette?
What are December temperatures in Lafayette?
What is the average humidity in December in Lafayette?
How many days does it rain in December in Lafayette?
What is the month with the shortest days in Lafayette?
How many hours of daylight does Lafayette have in December?
When are sunrise and sunset in December in Lafayette?
What is the month with the least sunshine in Lafayette?
How long on average sun shines in December in Lafayette?
What are the months with the lowest UV index in Lafayette?
What is the UV index reading in December in Lafayette?
Average temperature in December
Lafayette, CA
- Average high temperature in December: 55.2°F
The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is December (55.2°F).
- Average low temperature in December: 43.7°F
The months with the highest average low temperature are August and September (56.8°F).
The coldest month (with the lowest average low temperature) is January (43.3°F).
Average pressure in December
Lafayette, CA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed in December
Lafayette, CA
- Average wind speed in December: 5.2mph
The windiest month (with the highest average wind speed) is May (7.2mph).
The calmest month (with the lowest average wind speed) is November (4.6mph).
Average humidity in December
Lafayette, CA
- Average humidity in December: 71%
The month with the highest relative humidity is March (74%).
The month with the lowest relative humidity is October (60%).
Average rainfall in December
Lafayette, CA
- Average rainfall in December: 2.05"
The wettest month (with the highest rainfall) is February (2.6").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in December
Lafayette, CA
- Average rainfall days in December: 10.7 days
The month with the highest number of rainy days is March (13.1 days).
The month with the least rainy days is August (0.8 days).
Average daylight in December /
Average sunshine in December
Lafayette, CA
- Average daylight in December: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in December: 5h and 5min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in December
Lafayette, CA
- Average sunshine days in December: 19.2 days
The month with the most sunshine days is August (27.8 days).
The month with the least sunshine days is March (16.3 days).
Average UV index in December
Lafayette, CA
- Average UV index in December: 3
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in December
Lafayette, CA
- Average cloud cover in December: 34
The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is July (Cloud cover 8).
Average visibility in December
Lafayette, CA
- Average visibility in December: 6mi
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).
Lafayette, California, USA
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