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
With average temperatures fluctuating between a high of 32.5°F (0.3°C) and a low of 21.6°F (-5.8°C), December stands out as the coldest month.Humidity
The average relative humidity in December is 79%.Rainfall
In December, the rain falls for 8.7 days. Throughout December, 1.34" (34mm) of precipitation is accumulated. Throughout the year, there are 105.2 rainfall days, and 10.63" (270mm) of precipitation is accumulated.Snowfall
Months with snowfall in Heyburn, Idaho, are January through May, September through December. The month with the most snowfall is December, when snow falls for 13 days and typically aggregates up to 6.54" (166mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 6min of daylight.On the first day of the month, sunrise is at 7:45 am and sunset at 5:02 pm. On the last day of December, sunrise is at 8:04 am and sunset at 5:12 pm MST.
Sunshine
The average sunshine in December in Heyburn is 5.8h.UV index
December is the month with the lowest UV index, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for ordinary individuals.Note: The average daily UV index of 1 in December transforms into the following instructions:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Frequently asked questions
What time of the year is the coldest in Heyburn?
How cold is December in Heyburn?
What is the average humidity in December in Heyburn?
How many days does it rain in December in Heyburn?
What is the snowiest month in Heyburn?
How much does it snow in Heyburn in December?
What is the month with the shortest days in Heyburn?
What is the average length of the day in December in Heyburn?
What time are sunrise and sunset in December in Heyburn?
How long on average sun shines in December in Heyburn?
When is the lowest UV index in Heyburn?
What is the UV index reading in December in Heyburn?
Average temperature in December
Heyburn, ID
- Average high temperature in December: 32.5°F
The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is December (32.5°F).
- Average low temperature in December: 21.6°F
The months with the highest average low temperature are July and August (60.8°F).
The coldest month (with the lowest average low temperature) is December (21.6°F).
Average pressure in December
Heyburn, ID
- Average pressure in December: 30.24"Hg
The month with the highest atmospheric pressure is January (30.29"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in December
Heyburn, ID
- Average wind speed in December: 7.3mph
The windiest month (with the highest average wind speed) is April (9.8mph).
The calmest month (with the lowest average wind speed) is January (7.1mph).
Average humidity in December
Heyburn, ID
- Average humidity in December: 79%
The month with the highest relative humidity is January (80%).
The months with the lowest relative humidity are July and August (30%).
Average rainfall in December
Heyburn, ID
- Average rainfall in December: 1.34"
The wettest month (with the highest rainfall) is March (1.46").
The driest month (with the least rainfall) is July (0.28").
Average rainfall days in December
Heyburn, ID
- Average rainfall days in December: 8.7 days
The months with the highest number of rainy days are March and April (14 days).
The months with the least rainy days are July and August (5.2 days).
Average snowfall in December
Heyburn, ID
- Average snowfall in December: 6.54"
The month with the highest snowfall is December (6.54").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Heyburn, ID
- Average snowfall days in December: 13 days
The month with the highest number of snowfall days is December (13 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Heyburn, ID
- 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: 5h and 5min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 5h and 42min).
Average sunshine days in December
Heyburn, ID
- Average sunshine days in December: 13.8 days
The month with the most sunshine days is July (22.6 days).
The month with the least sunshine days is March (12 days).
Average UV index in December
Heyburn, ID
- Average UV index in December: 1
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Heyburn, ID
- Average cloud cover in December: 40
The month with the most cloud cover is December (Cloud cover 40).
The months with the least cloud cover are July and August (Cloud cover 11).
Average visibility in December
Heyburn, ID
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Heyburn, Idaho, USA
Weather forecast for your location
2. Allow the app to use your location
