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
Helena's progression into December involves a gentle drop in the average high-temperature, from a moderate 60.1°F (15.6°C) in November to a cool 51.8°F (11°C). An average temperature of 39.4°F (4.1°C) is recorded during the nights in December.Humidity
March and December, with an average relative humidity of 78%, are the most humid months in Helena, Arkansas.Rainfall
In December, the rain falls for 8.7 days. Throughout December, 1.26" (32mm) of precipitation is accumulated. Throughout the year, in Helena, Arkansas, there are 123 rainfall days, and 16.02" (407mm) of precipitation is accumulated.Snowfall
January, February and December are months with snowfall. December is the first month it typically snows in Helena. Throughout December, in the average 0.5 snowfall days, it receives 0.04" (1mm) of snow. In Helena, during the entire year, snow falls for 3.5 days and aggregates up to 0.35" (9mm) of snow.Daylight
With an average of 9h and 54min of daylight, December has the shortest days of the year in Helena.On the first day of the month, sunrise is at 6:51 am and sunset at 4:51 pm. On the last day of December, in Helena, Arkansas, sunrise is at 7:08 am and sunset at 5:02 pm CST.
Sunshine
The average sunshine in December is 5h.UV index
January, February and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the average person.Note: In December, an average UV index of 3 transforms into the following instructions:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Helena in December?
What are the most humid months in Helena?
What is the average humidity in December in Helena?
How much does it rain in Helena in December?
When does it start snowing in Helena?
What is the month with the shortest days in Helena?
What is the average length of the day in December in Helena?
When are sunrise and sunset in December in Helena?
How many hours of sunshine does Helena have in December?
What are the months with the lowest UV index in Helena?
How high is the UV index in December in Helena?
Average temperature in December
Helena, AR
- Average high temperature in December: 51.8°F
The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is January (48°F).
- Average low temperature in December: 39.4°F
The month with the highest average low temperature is July (73°F).
The coldest month (with the lowest average low temperature) is January (35.4°F).
Average pressure in December
Helena, AR
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Helena, AR
- Average wind speed in December: 8.5mph
The windiest month (with the highest average wind speed) is February (9.6mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in December
Helena, AR
- Average humidity in December: 78%
The months with the highest relative humidity are March and December (78%).
The month with the lowest relative humidity is October (67%).
Average rainfall in December
Helena, AR
- Average rainfall in December: 1.26"
The wettest month (with the highest rainfall) is April (1.89").
The driest month (with the least rainfall) is September (0.67").
Average rainfall days in December
Helena, AR
- Average rainfall days in December: 8.7 days
The month with the highest number of rainy days is July (15 days).
The month with the least rainy days is November (6.7 days).
Average snowfall in December
Helena, AR
- Average snowfall in December: 0.04"
The month with the highest snowfall is February (0.28").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Helena, AR
- Average snowfall days in December: 0.5 days
The month with the highest number of snowfall days is February (1.3 days).
The months with the least snowfall days are April, May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Helena, AR
- Average daylight in December: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in December: 5h and 0min
The month with the most sunshine is June (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in December
Helena, AR
- Average sunshine days in December: 19.9 days
The month with the most sunshine days is November (22.5 days).
The month with the least sunshine days is July (13.3 days).
Average UV index in December
Helena, AR
- Average UV index in December: 3
The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January, February and December (UV index 3).
Average cloud cover in December
Helena, AR
- Average cloud cover in December: 45
The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is June (Cloud cover 25).
Average visibility in December
Helena, AR
- 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).
Helena, Arkansas, USA
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