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
As Swaledale transitions into December, a noticeable drop in the average high-temperature is observed, falling from a wintry 42.6°F (5.9°C) in November to a subzero cold 28.2°F (-2.1°C). An average low-temperature of 17.8°F (-7.9°C) is recorded in the month of December in Swaledale.Humidity
In Swaledale, Iowa, the average relative humidity in December is 86%.Rainfall
In Swaledale, Iowa, during December, the rain falls for 5.8 days and regularly aggregates up to 1.57" (40mm) of precipitation. In Swaledale, during the entire year, the rain falls for 145.9 days and collects up to 28.82" (732mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In December, it is snowing for 13.3 days. Throughout December, 4.17" (106mm) of snow is accumulated. In Swaledale, Iowa, during the entire year, snow falls for 60.2 days and aggregates up to 26.26" (667mm) of snow.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year in Swaledale.On the first day of December in Swaledale, Iowa, sunrise is at 7:25 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 7:44 am and sunset at 4:48 pm CST.
Sunshine
In Swaledale, Iowa, the average sunshine in December is 4.1h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: A daily maximum UV index of 1 in December translates into the following instructions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Swaledale?
What is the average humidity in December in Swaledale?
How many days does it rain in December in Swaledale?
How many days does it snow in December in Swaledale?
What is the month with the shortest days in Swaledale?
How many hours of daylight does Swaledale have in December?
When are sunrise and sunset in December in Swaledale?
How many hours of sunshine does Swaledale have in December?
What is the month with the lowest UV index in Swaledale?
What is the UV index reading in December in Swaledale?
Average temperature in December
Swaledale, IA
- Average high temperature in December: 28.2°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (22.3°F).
- Average low temperature in December: 17.8°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (9.9°F).
Average pressure in December
Swaledale, IA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in December
Swaledale, IA
- Average wind speed in December: 10.4mph
The windiest months (with the highest average wind speed) are January and April (10.9mph).
The calmest months (with the lowest average wind speed) are July and August (7.3mph).
Average humidity in December
Swaledale, IA
- Average humidity in December: 86%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Swaledale, IA
- Average rainfall in December: 1.57"
The wettest month (with the highest rainfall) is June (4.65").
The driest month (with the least rainfall) is January (1.06").
Average rainfall days in December
Swaledale, IA
- Average rainfall days in December: 5.8 days
The month with the highest number of rainy days is June (19.8 days).
The month with the least rainy days is February (3.8 days).
Average snowfall in December
Swaledale, IA
- Average snowfall in December: 4.17"
The month with the highest snowfall is February (7.48").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Swaledale, IA
- Average snowfall days in December: 13.3 days
The month with the highest number of snowfall days is January (14.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Swaledale, IA
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 4h and 1min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in December
Swaledale, IA
- Average sunshine days in December: 14.5 days
The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is June (8 days).
Average UV index in December
Swaledale, IA
- Average UV index in December: 1
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Swaledale, IA
- Average cloud cover in December: 59
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in December
Swaledale, IA
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, August, September, October and November (6mi).
The months with the lowest visibility are January, February, July and December (5mi).
Swaledale, Iowa, USA
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