December weather forecastNewcastle, OK
December
Weather in December
December, the first month of the winter in Newcastle, is also a frosty month, with temperature in the range of an average low of 34.2°F (1.2°C) and an average high of 49.3°F (9.6°C).Temperature
Newcastle's transition into December involves a shift in temperature, receding from a refreshing 60.1°F (15.6°C) in November to a chilly 49.3°F (9.6°C). Newcastle records an average low of 34.2°F (1.2°C) throughout the nights in December.Humidity
The average relative humidity in December is 66%.Rainfall
February and December are months with the least rain in Newcastle when the rain falls for 5.5 days and typically aggregates up to 0.98" (25mm) of rain.Snowfall
Months with snowfall are January through March, November and December. In Newcastle, in December, during 1.4 snowfall days, 0.59" (15mm) of snow is typically accumulated. Throughout the year, there are 5.9 snowfall days, and 2.95" (75mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 48min of daylight.On the first day of December in Newcastle, sunrise is at 7:21 am and sunset at 5:18 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 5:28 pm CST.
Sunshine
December has the least sunshine of the year, with an average of 6.1h of sunshine.UV index
December is the month with the lowest UV index, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for the average person.Note: In December, a daily maximum UV index of 2 leads to the following instructions:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Newcastle, OK
- Average high temperature in December: 49.3°F
The warmest month (with the highest average high temperature) is July (93.6°F).
The month with the lowest average high temperature is January (49.1°F).
- Average low temperature in December: 34.2°F
The month with the highest average low temperature is July (73.2°F).
The coldest month (with the lowest average low temperature) is January (32°F).
Average pressure in December
Newcastle, 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
Newcastle, OK
- Average wind speed in December: 10.3mph
The windiest month (with the highest average wind speed) is April (12.2mph).
The calmest month (with the lowest average wind speed) is August (8.5mph).
Average humidity in December
Newcastle, OK
- Average humidity in December: 66%
The month with the highest relative humidity is May (74%).
The month with the lowest relative humidity is August (59%).
Average rainfall in December
Newcastle, OK
- Average rainfall in December: 0.98"
The wettest month (with the highest rainfall) is May (3.82").
The driest months (with the least rainfall) are February and December (0.98").
Average rainfall days in December
Newcastle, OK
- Average rainfall days in December: 5.5 days
The month with the highest number of rainy days is May (14.6 days).
The month with the least rainy days is January (4.6 days).
Average snowfall in December
Newcastle, OK
- Average snowfall in December: 0.59"
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
Newcastle, OK
- Average snowfall days in December: 1.4 days
The month with the highest number of snowfall days is February (1.8 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
Newcastle, 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: 6h and 6min
The months with the most sunshine are July and August (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 6min).
Average sunshine days in December
Newcastle, OK
- Average sunshine days in December: 23.5 days
The month with the most sunshine days is January (24.5 days).
The month with the least sunshine days is May (13.7 days).
Average UV index in December
Newcastle, 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
Newcastle, OK
- Average cloud cover in December: 31
The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is August (Cloud cover 18).
Average visibility in December
Newcastle, 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).
