December weather forecastSpiro, OK
December
Weather in December
December, the first month of the winter in Spiro, is also a fresh month, with an average temperature fluctuating between 35.2°F (1.8°C) and 50.4°F (10.2°C).Temperature
A shift in Spiro's weather is observed as November turns into December, with the average high temperature reducing from a refreshing 60.1°F (15.6°C) to a cool 50.4°F (10.2°C). In December, the average low-temperature records at a cold 35.2°F (1.8°C) during the nights.Humidity
In December, the average relative humidity is 74%.Rainfall
In Spiro, in December, during 9.9 rainfall days, 2.68" (68mm) of precipitation is typically accumulated. Throughout the year, there are 147.8 rainfall days, and 34.76" (883mm) of precipitation is accumulated.Snowfall
January through March, November and December are months with snowfall. In Spiro, in December, during 0.6 snowfall days, 0.35" (9mm) of snow is typically accumulated. Throughout the year, in Spiro, there are 5.8 snowfall days, and 2.87" (73mm) of snow is accumulated.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 7:09 am and sunset at 5:06 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 5:16 pm CST.
Sunshine
The average sunshine in December is 5.6h.UV index
December is the month with the lowest UV index, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for average individuals.Note: In December, a regular UV index of 2 translates into these guidelines:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Opt for tightly woven and loose clothing to enhance protection from the Sun. 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
Spiro, OK
- Average high temperature in December: 50.4°F
The warmest month (with the highest average high temperature) is July (93°F).
The month with the lowest average high temperature is January (48°F).
- Average low temperature in December: 35.2°F
The month with the highest average low temperature is July (71.2°F).
The coldest month (with the lowest average low temperature) is January (31.8°F).
Average pressure in December
Spiro, OK
- 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 (29.93"Hg).
Average wind speed in December
Spiro, OK
- Average wind speed in December: 6.6mph
The windiest month (with the highest average wind speed) is April (8.1mph).
The calmest months (with the lowest average wind speed) are July and August (5mph).
Average humidity in December
Spiro, OK
- Average humidity in December: 74%
The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is August (69%).
Average rainfall in December
Spiro, OK
- Average rainfall in December: 2.68"
The wettest month (with the highest rainfall) is May (4.45").
The driest months (with the least rainfall) are January and February (2.17").
Average rainfall days in December
Spiro, OK
- Average rainfall days in December: 9.9 days
The month with the highest number of rainy days is March (15.6 days).
The month with the least rainy days is November (8.9 days).
Average snowfall in December
Spiro, OK
- Average snowfall in December: 0.35"
The month with the highest snowfall is February (1.1").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Spiro, OK
- Average snowfall days in December: 0.6 days
The month with the highest number of snowfall days is February (2.1 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
Spiro, OK
- Average daylight in December: 9h and 48min
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 48min).
- Average sunshine in December: 5h and 36min
The months with the most sunshine are July and August (Average sunshine: 10h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 30min).
Average sunshine days in December
Spiro, OK
- Average sunshine days in December: 19.4 days
The month with the most sunshine days is January (19.6 days).
The month with the least sunshine days is May (13.4 days).
Average UV index in December
Spiro, OK
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in December
Spiro, OK
- Average cloud cover in December: 39
The month with the most cloud cover is February (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility in December
Spiro, 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).
