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
Waterville's transition into December involves a shift in temperature, receding from a cold 42.6°F (5.9°C) in November to a subzero cold 28.6°F (-1.9°C). Waterville anticipates an average minimum temperature of 18.1°F (-7.7°C) in the month of December.Humidity
The average relative humidity in December is 86%.Rainfall
In Waterville, during December, the rain falls for 5.2 days and regularly aggregates up to 1.65" (42mm) of precipitation. In Waterville, during the entire year, the rain falls for 144.7 days and collects up to 30.94" (786mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Waterville, in December, during 12.7 snowfall days, 4.92" (125mm) of snow is typically accumulated. In Waterville, during the entire year, snow falls for 57.7 days and aggregates up to 24.88" (632mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 0min of daylight.On the first day of the month, sunrise is at 7:18 am and sunset at 4:30 pm. On the last day of December, sunrise is at 7:37 am and sunset at 4:39 pm CST.
Sunshine
In Waterville, the average sunshine in December is 3.9h.UV index
January, February, November 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 health risk from exposure to the Sun's UV rays for the ordinary person.Note: In December, the average maximum UV index of 1 translates into the following recommendations:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. 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 December?
What is the average humidity in December?
How much does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Waterville have in December?
What time are sunrise and sunset in December?
How many hours of sunshine does Waterville have in December?
What are the months with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Waterville, IA
- Average high temperature in December: 28.6°F
The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (22.5°F).
- Average low temperature in December: 18.1°F
The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is January (9.7°F).
Average pressure in December
Waterville, IA
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in December
Waterville, IA
- Average wind speed in December: 9.5mph
The windiest month (with the highest average wind speed) is April (10.2mph).
The calmest months (with the lowest average wind speed) are July and August (6.9mph).
Average humidity in December
Waterville, IA
- Average humidity in December: 86%
The months with the highest relative humidity are January and February (89%).
The month with the lowest relative humidity is October (76%).
Average rainfall in December
Waterville, IA
- Average rainfall in December: 1.65"
The wettest month (with the highest rainfall) is June (5.24").
The driest month (with the least rainfall) is January (1.1").
Average rainfall days in December
Waterville, IA
- Average rainfall days in December: 5.2 days
The month with the highest number of rainy days is May (20 days).
The month with the least rainy days is February (4.3 days).
Average snowfall in December
Waterville, IA
- Average snowfall in December: 4.92"
The month with the highest snowfall is February (6.06").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Waterville, IA
- Average snowfall days in December: 12.7 days
The month with the highest number of snowfall days is January (13.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Waterville, IA
- Average daylight in December: 9h and 0min
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 0min).
- Average sunshine in December: 3h and 5min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in December
Waterville, IA
- Average sunshine days in December: 15 days
The month with the most sunshine days is November (16.7 days).
The month with the least sunshine days is June (7.6 days).
Average UV index in December
Waterville, IA
- 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, February, November and December (UV index 1).
Average cloud cover in December
Waterville, IA
- Average cloud cover in December: 61
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in December
Waterville, 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).
Waterville, Iowa, USA
Weather forecast for your location
2. Allow the app to use your location