December weather forecastHelendale, CA
December
Weather in December
The first month of the winter, December, is still a cool month in Helendale, California, with temperature in the range of an average low of 38.3°F (3.5°C) and an average high of 53.2°F (11.8°C).Temperature
Helendale's coldest weather arrives in December, when temperatures average a high of 53.2°F (11.8°C) and a low of 38.3°F (3.5°C).Humidity
With an average relative humidity of 52%, December is the most humid month in Helendale, California.Rainfall
The month with the most rainfall is December, when the rain falls for 5.4 days and typically aggregates up to 0.98" (25mm) of precipitation.Snowfall
Months with snowfall are January, February, April, November and December. In Helendale, during December, snow falls for 0.3 days and regularly aggregates up to 0.91" (23mm) of snow. In Helendale, during the entire year, snow falls for 2.1 days and aggregates up to 3.78" (96mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 54min of daylight.On the first day of the month, sunrise is at 6:38 am and sunset at 4:38 pm. On the last day of December, in Helendale, sunrise is at 6:56 am and sunset at 4:48 pm PST.
Sunshine
The months with the least sunshine are January and December, with an average of 7h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index of 3 in December interprets into the following recommendations:
Undertake protective steps - Preventing sun damage is advised. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Helendale, CA
- Average high temperature in December: 53.2°F
The warmest month (with the highest average high temperature) is July (92.1°F).
The month with the lowest average high temperature is December (53.2°F).
- Average low temperature in December: 38.3°F
The month with the highest average low temperature is August (68.5°F).
The coldest month (with the lowest average low temperature) is December (38.3°F).
Average pressure in December
Helendale, CA
- Average pressure in December: 30.08"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).
Average wind speed in December
Helendale, CA
- Average wind speed in December: 6.5mph
The windiest month (with the highest average wind speed) is May (10.3mph).
The calmest month (with the lowest average wind speed) is January (6.3mph).
Average humidity in December
Helendale, CA
- Average humidity in December: 52%
The month with the highest relative humidity is December (52%).
The month with the lowest relative humidity is August (27%).
Average rainfall in December
Helendale, CA
- Average rainfall in December: 0.98"
The wettest month (with the highest rainfall) is December (0.98").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in December
Helendale, CA
- Average rainfall days in December: 5.4 days
The month with the highest number of rainy days is March (6 days).
The month with the least rainy days is June (0.9 days).
Average snowfall in December
Helendale, CA
- Average snowfall in December: 0.91"
The month with the highest snowfall is November (1.73").
The months with the least snowfall are March, May, June, July, August, September and October (0").
Average snowfall days in December
Helendale, CA
- Average snowfall days in December: 0.3 days
The month with the highest number of snowfall days is February (1 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
Helendale, CA
- Average daylight in December: 9h and 54min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in December: 7h and 0min
The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The months with the least sunshine are January and December (Average sunshine: 7h and 0min).
Average sunshine days in December
Helendale, CA
- Average sunshine days in December: 24.6 days
The month with the most sunshine days is June (28.9 days).
The month with the least sunshine days is February (22.4 days).
Average UV index in December
Helendale, CA
- Average UV index in December: 3
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in December
Helendale, CA
- Average cloud cover in December: 21
The month with the most cloud cover is December (Cloud cover 21).
The months with the least cloud cover are June and August (Cloud cover 5).
Average visibility in December
Helendale, 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).
