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
Transition into December marks a drop in the average high-temperature, moving from a chilly 46.2°F (7.9°C) in November to an icy 33.8°F (1°C). During December, West Branch records an average temperature of 23°F (-5°C) at night.Humidity
The average relative humidity in December is 81%.Rainfall
In West Branch, during December, the rain falls for 6.5 days and regularly aggregates up to 1.42" (36mm) of precipitation. In West Branch, during the entire year, the rain falls for 139.1 days and collects up to 29.57" (751mm) of precipitation.Snowfall
January through April, October through December are months with snowfall in West Branch. In West Branch, during December, snow falls for 7.3 days and regularly aggregates up to 2.44" (62mm) of snow. In West Branch, Iowa, during the entire year, snow falls for 34.5 days and aggregates up to 16.85" (428mm) of snow.Daylight
With an average of 9h and 12min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:13 am and sunset at 4:35 pm. On the last day of December, in West Branch, sunrise is at 7:32 am and sunset at 4:45 pm CST.
Sunshine
In December, the average sunshine is 4.5h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index in West Branch. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV rays for the average person.Note: A maximum high daily UV index of 1 during December translates into the following directions:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in West Branch?
What is the average humidity in December in West Branch?
How much does it rain in West Branch in December?
How many days does it snow in December in West Branch?
What is the month with the shortest days in West Branch?
How many hours of daylight does West Branch have in December?
When are sunrise and sunset in December in West Branch?
How long on average sun shines in December in West Branch?
What are the months with the lowest UV index in West Branch?
What is the UV index reading in December in West Branch?
Average temperature in December
West Branch, IA
- Average high temperature in December: 33.8°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (27.3°F).
- Average low temperature in December: 23°F
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (15.4°F).
Average pressure in December
West Branch, IA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in December
West Branch, IA
- Average wind speed in December: 9.9mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity in December
West Branch, IA
- Average humidity in December: 81%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
West Branch, IA
- Average rainfall in December: 1.42"
The wettest month (with the highest rainfall) is May (4.61").
The driest month (with the least rainfall) is January (1.3").
Average rainfall days in December
West Branch, IA
- Average rainfall days in December: 6.5 days
The month with the highest number of rainy days is May (18.7 days).
The month with the least rainy days is January (4.4 days).
Average snowfall in December
West Branch, IA
- Average snowfall in December: 2.44"
The month with the highest snowfall is January (5.24").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
West Branch, IA
- Average snowfall days in December: 7.3 days
The month with the highest number of snowfall days is January (9.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
West Branch, IA
- 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: 4h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in December
West Branch, IA
- Average sunshine days in December: 18.6 days
The month with the most sunshine days is November (19 days).
The month with the least sunshine days is June (9.2 days).
Average UV index in December
West Branch, IA
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
West Branch, IA
- Average cloud cover in December: 53
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in December
West Branch, IA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
West Branch, Iowa, USA
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