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
With the onset of December, Helena experiences a modest temperature adjustment, with the average high-temperature gently receding from a refreshing 62.4°F (16.9°C) in November to a cool 55°F (12.8°C). Helena records a steady low-temperature average of 40.5°F (4.7°C) during December.Humidity
With an average relative humidity of 80%, December is the most humid month.Rainfall
In December, the rain falls for 12.7 days. Throughout December, 3.98" (101mm) of precipitation is accumulated. Throughout the year, there are 174.2 rainfall days, and 40.08" (1018mm) of precipitation is accumulated.Snowfall
January through March, November and December are months with snowfall. In December, it is snowing for 0.6 days. Throughout December, 0.55" (14mm) of snow is accumulated. Throughout the year, there are 3.3 snowfall days, and 1.81" (46mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 10h and 0min of daylight.On the first day of December, sunrise is at 6:33 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 4:50 pm CST.
Sunshine
The months with the least sunshine are February and December, with an average of 4.9h of sunshine.UV index
The months with the lowest UV index are January, February and December, with an average maximum UV index of 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: In December, the maximum UV index of 3 suggests this advice:
Undertake precautions - Guarding against sun damage is counselled. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are December temperatures?
What is the most humid month?
What is the average humidity in December?
How much does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Helena have in December?
When are sunrise and sunset in December?
What is the month with the least sunshine?
How many hours of sunshine does Helena have in December?
When is the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Helena, AL
- Average high temperature in December: 55°F
The warmest month (with the highest average high temperature) is July (90.5°F).
The month with the lowest average high temperature is January (51.1°F).
- Average low temperature in December: 40.5°F
The month with the highest average low temperature is August (71.4°F).
The coldest month (with the lowest average low temperature) is January (36°F).
Average pressure in December
Helena, AL
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The months with the lowest atmospheric pressure are June and August (29.98"Hg).
Average wind speed in December
Helena, AL
- Average wind speed in December: 7mph
The windiest months (with the highest average wind speed) are February and March (7.3mph).
The calmest months (with the lowest average wind speed) are July and August (4.4mph).
Average humidity in December
Helena, AL
- Average humidity in December: 80%
The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Helena, AL
- Average rainfall in December: 3.98"
The wettest month (with the highest rainfall) is April (4.09").
The driest months (with the least rainfall) are September and October (2.36").
Average rainfall days in December
Helena, AL
- Average rainfall days in December: 12.7 days
The month with the highest number of rainy days is July (21.8 days).
The month with the least rainy days is November (9.3 days).
Average snowfall in December
Helena, AL
- Average snowfall in December: 0.55"
The month with the highest snowfall is January (0.79").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Helena, AL
- Average snowfall days in December: 0.6 days
The month with the highest number of snowfall days is January (1.2 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Helena, AL
- Average daylight in December: 10h and 0min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in December: 4h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 42min).
The months with the least sunshine are February and December (Average sunshine: 4h and 54min).
Average sunshine days in December
Helena, AL
- Average sunshine days in December: 15.9 days
The month with the most sunshine days is October (19.7 days).
The month with the least sunshine days is July (7.3 days).
Average UV index in December
Helena, AL
- Average UV index in December: 3
The month with the highest UV index is August (UV index 7).
The months with the lowest UV index are January, February and December (UV index 3).
Average cloud cover in December
Helena, AL
- Average cloud cover in December: 46
The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is September (Cloud cover 29).
Average visibility in December
Helena, AL
- 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, Alabama, USA
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