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 implies a gentle temperature shift, with average high-temperatures reducing from November's chilly 44.8°F (7.1°C) to an icy 32.5°F (0.3°C). Seward sees an average low-temperature of 22.5°F (-5.3°C) during December.Humidity
In Seward, the average relative humidity in December is 83%.Rainfall
In Seward, in December, it is raining for 4.6 days, with typically 0.39" (10mm) of accumulated precipitation. Throughout the year, there are 100.6 rainfall days, and 7.99" (203mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall in Seward. In Seward, in December, snow falls for 6.6 days, with typically accumulated 0.35" (9mm) of snow. In Seward, during the entire year, snow falls for 29.5 days and aggregates up to 3.66" (93mm) of snow.Daylight
With an average of 9h and 12min of daylight, December has the shortest days of the year in Seward.On the first day of December in Seward, sunrise is at 7:07 am and sunset at 4:26 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 4:35 pm CST.
Sunshine
In Seward, the average sunshine in December is 3.9h.UV index
The months with the lowest UV index in Seward are January and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for average individuals.Note: In December, the maximum UV index of 1 suggests these recommendations:
While many people can endure lengthy sun exposure, it remains imperative to safeguard babies, children, and fair-skinned individuals. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Seward in December?
What is the average humidity in December in Seward?
How much does it rain in Seward in December?
How much does it snow in Seward in December?
What is the month with the shortest days in Seward?
What is the average length of the day in December in Seward?
When are sunrise and sunset in December in Seward?
How long on average sun shines in December in Seward?
When is the lowest UV index in Seward?
What is the UV index intensity in December in Seward?
Average temperature in December
Seward, IL
- Average high temperature in December: 32.5°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (26.2°F).
- Average low temperature in December: 22.5°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (14°F).
Average pressure in December
Seward, IL
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Seward, IL
- Average wind speed in December: 9.4mph
The windiest month (with the highest average wind speed) is April (10.2mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in December
Seward, IL
- Average humidity in December: 83%
The month with the highest relative humidity is January (86%).
The months with the lowest relative humidity are April and October (75%).
Average rainfall in December
Seward, IL
- Average rainfall in December: 0.39"
The wettest month (with the highest rainfall) is May (1.18").
The driest months (with the least rainfall) are January and February (0.35").
Average rainfall days in December
Seward, IL
- Average rainfall days in December: 4.6 days
The month with the highest number of rainy days is May (13.8 days).
The month with the least rainy days is January (3.2 days).
Average snowfall in December
Seward, IL
- Average snowfall in December: 0.35"
The month with the highest snowfall is January (1.42").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Seward, IL
- Average snowfall days in December: 6.6 days
The month with the highest number of snowfall days is January (8.1 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
Seward, IL
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 3h and 5min
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 42min).
Average sunshine days in December
Seward, IL
- Average sunshine days in December: 22.6 days
The month with the most sunshine days is December (22.6 days).
The month with the least sunshine days is June (12.8 days).
Average UV index in December
Seward, IL
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Seward, IL
- Average cloud cover in December: 59
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is September (Cloud cover 33).
Average visibility in December
Seward, IL
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
Seward, Illinois, USA
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