December weather forecastHennessey, OK
December
Weather in December
December, the first month of the winter in Hennessey, is also a frosty month, with temperature in the range of an average high of 49.1°F (9.5°C) and an average low of 32.4°F (0.2°C).Temperature
The arrival of December signals a shift in temperature, down from a moderate 59.2°F (15.1°C) in November to a chilly 49.1°F (9.5°C). December witnesses an average low-temperature hovering around a wintry 32.4°F (0.2°C).Humidity
The average relative humidity in December is 66%.Rainfall
December is the month with the least rainfall. Rain falls for 5.2 days and accumulates 0.71" (18mm) of precipitation.Snowfall
Months with snowfall in Hennessey are January through March, October through December. In Hennessey, during December, snow falls for 1.1 days and regularly aggregates up to 0.2" (5mm) of snow. In Hennessey, Oklahoma, during the entire year, snow falls for 6.6 days and aggregates up to 2.28" (58mm) of snow.Daylight
With an average of 9h and 48min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:24 am and sunset at 5:17 pm. On the last day of the month, sunrise is at 7:42 am and sunset at 5:27 pm CST.
Sunshine
The month with the least sunshine is December, with an average of 6.2h of sunshine.UV index
The month with the lowest UV index is December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for average individuals.Note: A daily high UV index of 2 in December leads to these guidelines:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. 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. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Hennessey, OK
- Average high temperature in December: 49.1°F
The warmest month (with the highest average high temperature) is July (95.4°F).
The month with the lowest average high temperature is January (48°F).
- Average low temperature in December: 32.4°F
The month with the highest average low temperature is July (74.8°F).
The coldest month (with the lowest average low temperature) is January (30.9°F).
Average pressure in December
Hennessey, OK
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in December
Hennessey, OK
- Average wind speed in December: 10mph
The windiest month (with the highest average wind speed) is April (11.9mph).
The calmest month (with the lowest average wind speed) is August (8.6mph).
Average humidity in December
Hennessey, OK
- Average humidity in December: 66%
The month with the highest relative humidity is May (69%).
The month with the lowest relative humidity is August (56%).
Average rainfall in December
Hennessey, OK
- Average rainfall in December: 0.71"
The wettest month (with the highest rainfall) is May (3.94").
The driest month (with the least rainfall) is December (0.71").
Average rainfall days in December
Hennessey, OK
- Average rainfall days in December: 5.2 days
The month with the highest number of rainy days is May (13 days).
The month with the least rainy days is January (3.8 days).
Average snowfall in December
Hennessey, OK
- Average snowfall in December: 0.2"
The month with the highest snowfall is February (0.98").
The months with the least snowfall are April, May, June, July, August and September (0").
Average snowfall days in December
Hennessey, OK
- Average snowfall days in December: 1.1 days
The month with the highest number of snowfall days is February (2.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Hennessey, OK
- Average daylight in December: 9h and 48min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in December: 6h and 12min
The months with the most sunshine are June and July (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 12min).
Average sunshine days in December
Hennessey, OK
- Average sunshine days in December: 23.8 days
The month with the most sunshine days is January (24.4 days).
The month with the least sunshine days is April (15.8 days).
Average UV index in December
Hennessey, OK
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in December
Hennessey, OK
- Average cloud cover in December: 29
The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is June (Cloud cover 18).
Average visibility in December
Hennessey, OK
- 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).
