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
The lowest temperatures are recorded in December, with averages reaching a high of 25.5°F (-3.6°C) and a low of 9.9°F (-12.3°C).Humidity
In Saint Charles, Idaho, the average relative humidity in December is 89%.Rainfall
In December, in Saint Charles, the rain falls for 5.5 days. Throughout December, 1.22" (31mm) of precipitation is accumulated. Throughout the year, in Saint Charles, Idaho, there are 105.7 rainfall days, and 16.69" (424mm) of precipitation is accumulated.Snowfall
Months with snowfall in Saint Charles are January through June, September through December. In Saint Charles, in December, snow falls for 18.5 days, with typically accumulated 9.09" (231mm) of snow. In Saint Charles, Idaho, during the entire year, snow falls for 104.6 days and aggregates up to 63.58" (1615mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 12min of daylight.On the first day of December in Saint Charles, sunrise is at 7:35 am and sunset at 4:54 pm. On the last day of the month, sunrise is at 7:53 am and sunset at 5:04 pm MST.
Sunshine
In Saint Charles, the average sunshine in December is 4.6h.UV index
The months with the lowest UV index are January, November and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the average person.Note: A maximum high UV index of 1 in December translates into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. During bright days, sunglasses that offer UVA and UVB defense are recommended. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Frequently asked questions
What part of the year is the coldest in Saint Charles?
How cold is December in Saint Charles?
What is the average humidity in December in Saint Charles?
How much does it rain in Saint Charles in December?
How much does it snow in Saint Charles in December?
What is the month with the shortest days in Saint Charles?
How many hours of daylight does Saint Charles have in December?
What time are sunrise and sunset in December in Saint Charles?
How many hours of sunshine does Saint Charles have in December?
When is the lowest UV index in Saint Charles?
What is the UV index reading in December in Saint Charles?
Average temperature in December
Saint Charles, ID
- Average high temperature in December: 25.5°F
The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is December (25.5°F).
- Average low temperature in December: 9.9°F
The month with the highest average low temperature is August (49.8°F).
The coldest month (with the lowest average low temperature) is January (8.4°F).
Average pressure in December
Saint Charles, ID
- Average pressure in December: 30.25"Hg
The month with the highest atmospheric pressure is January (30.29"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in December
Saint Charles, ID
- Average wind speed in December: 4.4mph
The windiest month (with the highest average wind speed) is June (6mph).
The calmest month (with the lowest average wind speed) is January (4.3mph).
Average humidity in December
Saint Charles, ID
- Average humidity in December: 89%
The month with the highest relative humidity is January (92%).
The month with the lowest relative humidity is August (42%).
Average rainfall in December
Saint Charles, ID
- Average rainfall in December: 1.22"
The wettest month (with the highest rainfall) is May (2.28").
The driest month (with the least rainfall) is July (0.91").
Average rainfall days in December
Saint Charles, ID
- Average rainfall days in December: 5.5 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (4.3 days).
Average snowfall in December
Saint Charles, ID
- Average snowfall in December: 9.09"
The month with the highest snowfall is March (12.17").
The months with the least snowfall are July and August (0").
Average snowfall days in December
Saint Charles, ID
- Average snowfall days in December: 18.5 days
The month with the highest number of snowfall days is February (20 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Saint Charles, ID
- 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 4min
The months with the most sunshine are July and August (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in December
Saint Charles, ID
- Average sunshine days in December: 12.6 days
The month with the most sunshine days is July (18.4 days).
The month with the least sunshine days is February (8.6 days).
Average UV index in December
Saint Charles, ID
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in December
Saint Charles, ID
- Average cloud cover in December: 56
The month with the most cloud cover is February (Cloud cover 63).
The months with the least cloud cover are July and August (Cloud cover 13).
Average visibility in December
Saint Charles, ID
- Average visibility in December: 4mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January and February (3mi).
Saint Charles, Idaho, USA
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