December weather forecastEast Palo Alto, CA
December
Weather in December
December, the first month of the winter in East Palo Alto, is also a moderate month, with an average temperature ranging between min 45.5°F (7.5°C) and max 56.3°F (13.5°C).Temperature
In East Palo Alto, December is the coldest month, with temperatures averaging a high of 56.3°F (13.5°C) and a low of 45.5°F (7.5°C).Humidity
The average relative humidity in December in East Palo Alto is 71%.Rainfall
In December, the rain falls for 8.6 days. Throughout December, 1.54" (39mm) of precipitation is accumulated. Throughout the year, there are 63.3 rainfall days, and 9.53" (242mm) of precipitation is accumulated.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 East Palo Alto, sunrise is at 7:05 am and sunset at 4:50 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 5:00 pm PST.
Sunshine
The month with the least sunshine is December, with an average of 5.9h of sunshine.UV index
The months with the lowest UV index are February, November and December, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: A maximum high UV index of 3 in December translates into the following recommendations:
Undertake precautions - Obligation exists to protect against skin and eye damage. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Stay sun-safe with clothing that is both closely woven and worn loosely.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
East Palo Alto, CA
- Average high temperature in December: 56.3°F
The warmest months (with the highest average high temperature) are July and August (77.5°F).
The month with the lowest average high temperature is December (56.3°F).
- Average low temperature in December: 45.5°F
The month with the highest average low temperature is August (57°F).
The coldest months (with the lowest average low temperature) are January and February (45.1°F).
Average pressure in December
East Palo Alto, CA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June and September (29.92"Hg).
Average wind speed in December
East Palo Alto, CA
- Average wind speed in December: 5.7mph
The windiest months (with the highest average wind speed) are April and May (6.5mph).
The calmest months (with the lowest average wind speed) are September and October (4.9mph).
Average humidity in December
East Palo Alto, CA
- Average humidity in December: 71%
The month with the highest relative humidity is March (74%).
The months with the lowest relative humidity are September and October (65%).
Average rainfall in December
East Palo Alto, CA
- Average rainfall in December: 1.54"
The wettest month (with the highest rainfall) is February (2.01").
The driest month (with the least rainfall) is July (0").
Average rainfall days in December
East Palo Alto, CA
- Average rainfall days in December: 8.6 days
The month with the highest number of rainy days is March (12.3 days).
The month with the least rainy days is August (0.6 days).
Average daylight in December /
Average sunshine in December
East Palo Alto, CA
- Average daylight in December: 9h and 36min
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 54min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).
Average sunshine days in December
East Palo Alto, CA
- Average sunshine days in December: 21.7 days
The month with the most sunshine days is July (30.2 days).
The month with the least sunshine days is March (18 days).
Average UV index in December
East Palo Alto, CA
- Average UV index in December: 3
The months with the highest UV index are April, May, June, July, August, September and October (UV index 5).
The months with the lowest UV index are February, November and December (UV index 3).
Average cloud cover in December
East Palo Alto, CA
- Average cloud cover in December: 34
The months with the most cloud cover are March and December (Cloud cover 34).
The month with the least cloud cover is July (Cloud cover 6).
Average visibility in December
East Palo Alto, 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).
