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
December heralds a minor drop in average high-temperature, sliding from November's mild 60.4°F (15.8°C) to a cool 54.1°F (12.3°C). During the nights in December, Irwin observes an average low-temperature of 39.7°F (4.3°C).Humidity
May and December, with an average relative humidity of 75%, are the most humid months in Irwin.Rainfall
In December, in Irwin, the rain falls for 8.5 days. Throughout December, 1.02" (26mm) of precipitation is accumulated. Throughout the year, in Irwin, there are 120.6 rainfall days, and 11.97" (304mm) of precipitation is accumulated.Snowfall
March through December are months without snowfall.Daylight
The month with the shortest days in Irwin is December, with an average of 9h and 54min of daylight.On the first day of December, sunrise is at 7:12 am and sunset at 5:12 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 5:22 pm EST.
Sunshine
The month with the least sunshine is December, with an average of 5.5h of sunshine.UV index
In Irwin, the average daily maximum UV index in December is 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the average person.Note: A maximum UV index of 3 in December translates into the following recommendations:
Put precautions into practice - Guidance to elude sunburn is provided. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Opt for tightly woven and loose clothing to enhance protection from the Sun. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Frequently asked questions
What is the usual temperature for Irwin in December?
What is the most humid month in Irwin?
What is the average humidity in December in Irwin?
How many days does it rain in December in Irwin?
When it does not snow in Irwin?
Does it snow in Irwin in December?
What is the month with the shortest days in Irwin?
How many hours of daylight does Irwin have in December?
When are sunrise and sunset in December in Irwin?
What is the month with the least sunshine in Irwin?
How long on average sun shines in December in Irwin?
How high is the UV index in December in Irwin?
Average temperature in December
Irwin, SC
- Average high temperature in December: 54.1°F
The warmest month (with the highest average high temperature) is July (90.3°F).
The month with the lowest average high temperature is January (49.8°F).
- Average low temperature in December: 39.7°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 (35.2°F).
Average pressure in December
Irwin, SC
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in December
Irwin, SC
- Average wind speed in December: 6.9mph
The windiest months (with the highest average wind speed) are February and April (8mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in December
Irwin, SC
- Average humidity in December: 75%
The months with the highest relative humidity are May and December (75%).
The months with the lowest relative humidity are June, July and November (71%).
Average rainfall in December
Irwin, SC
- Average rainfall in December: 1.02"
The wettest month (with the highest rainfall) is August (1.61").
The driest month (with the least rainfall) is September (0.51").
Average rainfall days in December
Irwin, SC
- Average rainfall days in December: 8.5 days
The month with the highest number of rainy days is July (14.9 days).
The month with the least rainy days is November (5.9 days).
Average snowfall in December
Irwin, SC
- Average snowfall in December: 0"
The month with the highest snowfall is February (0.12").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in December
Irwin, SC
- Average snowfall days in December: 0.1 days
The month with the highest number of snowfall days is February (0.5 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
Irwin, SC
- 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 3min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in December
Irwin, SC
- Average sunshine days in December: 20.6 days
The month with the most sunshine days is October (23.5 days).
The month with the least sunshine days is July (12.9 days).
Average UV index in December
Irwin, SC
- Average UV index in December: 3
The months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in December
Irwin, SC
- Average cloud cover in December: 41
The month with the most cloud cover is February (Cloud cover 42).
The month with the least cloud cover is June (Cloud cover 28).
Average visibility in December
Irwin, SC
- 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).
Irwin, South Carolina, USA
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