December weather forecast
Meridian, ID

The trees blossom with colorful flower petals near a high water tower in Meridian, Idaho
The trees blossom with colorful flower petals near a high water tower in Meridian, Idaho

Weather in December

The first month of the winter, December, is still a cold month in Meridian, Idaho, with temperature in the range of an average low of 24.6°F (-4.1°C) and an average high of 36°F (2.2°C).

Temperature

December is the coldest month, with an average high-temperature of 36°F (2.2°C) and an average low-temperature of 24.6°F (-4.1°C).

Humidity

In Meridian, Idaho, the average relative humidity in December is 77%.

Rainfall

In December, in Meridian, the rain falls for 10.4 days. Throughout December, 1.77" (45mm) of precipitation is accumulated. Throughout the year, there are 112.8 rainfall days, and 12.48" (317mm) of precipitation is accumulated.

Snowfall

January through March, November and December are months with snowfall. The month with the most snowfall is December, when snow falls for 8.5 days and typically aggregates up to 4.88" (124mm) of snow.

Daylight

With an average of 9h and 0min of daylight, December has the shortest days of the year in Meridian.
On the first day of the month, sunrise is at 7:58 am and sunset at 5:10 pm. On the last day of December, sunrise is at 8:18 am and sunset at 5:18 pm MST.

Sunshine

With an average of 5.7h of sunshine, December has the least sunshine of the year.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the coldest month in Meridian?

The coldest month is December, with an average high-temperature of 36°F (2.2°C) and an average low-temperature of 24.6°F (-4.1°C).

What is the temperature in December in Meridian?

The average high-temperature, in December, in Meridian, Idaho, is 36°F (2.2°C), while the average low-temperature is 24.6°F (-4.1°C).

What is the average humidity in December in Meridian?

In December, the average relative humidity is 77%.

How much does it rain in Meridian in December?

In Meridian, in December, during 10.4 rainfall days, 1.77" (45mm) of precipitation is typically accumulated.

When does it snow the most in Meridian?

December is the month with the most snowfall in Meridian, Idaho. Snow falls for 8.5 days and accumulates 4.88" (124mm) of snow.

How much does it snow in Meridian in December?

In Meridian, Idaho, in December, during 8.5 snowfall days, 4.88" (124mm) of snow is typically accumulated.

What is the month with the shortest days in Meridian?

December has the shortest days of the year in Meridian, Idaho, with an average of 9h and 0min of daylight.

What is the average length of the day in December in Meridian?

The average day length in December is 9h and 0min.

What time are sunrise and sunset in December in Meridian?

In December, on the first day of the month, sunrise is at 7:58 am and sunset at 5:10 pm. On the last day of the month, in Meridian, Idaho, sunrise is at 8:18 am and sunset at 5:18 pm MST.

What is the month with the least sunshine in Meridian?

With an average of 5.7h of sunshine, December has the least sunshine of the year.

How long on average sun shines in December in Meridian?

The average sunshine duration in December in Meridian, Idaho, is 5.7h.

What is the month with the lowest UV index in Meridian?

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Meridian, Idaho.

How high is the UV index in December in Meridian?

In Meridian, the average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Meridian, ID

Average temperature in December - Meridian, ID
  • Average high temperature in December: 36°F

The warmest month (with the highest average high temperature) is July (90.3°F).
The month with the lowest average high temperature is December (36°F).

  • Average low temperature in December: 24.6°F

The month with the highest average low temperature is August (62.2°F).
The coldest month (with the lowest average low temperature) is December (24.6°F).

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Average pressure in December
Meridian, ID

Average pressure in December - Meridian, ID
  • Average pressure in December: 30.21"Hg

The month with the highest atmospheric pressure is January (30.25"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

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Average wind speed in December
Meridian, ID

Average wind speed in December - Meridian, ID
  • Average wind speed in December: 6.1mph

The windiest months (with the highest average wind speed) are March and April (7.3mph).
The calmest month (with the lowest average wind speed) is January (5.4mph).

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Average humidity in December
Meridian, ID

Average humidity in December - Meridian, ID
  • Average humidity in December: 77%

The month with the highest relative humidity is January (79%).
The months with the lowest relative humidity are July and August (30%).

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Average rainfall in December
Meridian, ID

Average rainfall in December - Meridian, ID
  • Average rainfall in December: 1.77"

The wettest month (with the highest rainfall) is March (1.97").
The driest month (with the least rainfall) is July (0.12").

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Average rainfall days in December
Meridian, ID

Average rainfall days in December - Meridian, ID
  • Average rainfall days in December: 10.4 days

The month with the highest number of rainy days is March (16.2 days).
The month with the least rainy days is July (3.2 days).

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Average snowfall in December
Meridian, ID

Average snowfall in December - Meridian, ID
  • Average snowfall in December: 4.88"

The month with the highest snowfall is December (4.88").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in December
Meridian, ID

Average snowfall days in December - Meridian, ID
  • Average snowfall days in December: 8.5 days

The month with the highest number of snowfall days is December (8.5 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in December /
Average sunshine in December
Meridian, ID

Average daylight in December / Average sunshine in December - Meridian, ID
  • Average daylight in December: 9h and 0min

The month with the longest days is June (Average daylight: 15h and 23min).
The month with the shortest days is December (Average daylight: 9h and 0min).

  • Average sunshine in December: 5h and 42min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).

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Average sunshine days in December
Meridian, ID

Average sunshine days in December - Meridian, ID
  • Average sunshine days in December: 15.6 days

The month with the most sunshine days is July (25.4 days).
The month with the least sunshine days is March (12.3 days).

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Average UV index in December
Meridian, ID

Average UV index in December - Meridian, ID
  • Average UV index in December: 2

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in December
Meridian, ID

Average cloud cover in December - Meridian, 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 8).

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Average visibility in December
Meridian, ID

Average visibility in December - Meridian, ID
  • Average visibility in December: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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