December weather forecast
Fortuna, MO

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Weather in December

The first month of the winter, December, is still a cold month in Fortuna, Missouri, with an average temperature fluctuating between 28.6°F (-1.9°C) and 41.7°F (5.4°C).

Temperature

Stepping into December, Fortuna observes a temperature decline, with the average high falling from November's cool 52.9°F (11.6°C) to a cold 41.7°F (5.4°C). During December nights, Fortuna witnesses a consistent average temperature of 28.6°F (-1.9°C).

Humidity

In Fortuna, the average relative humidity in December is 76%.

Rainfall

In Fortuna, in December, it is raining for 6.6 days, with typically 1.57" (40mm) of accumulated precipitation. In Fortuna, during the entire year, the rain falls for 141.2 days and collects up to 29.72" (755mm) of precipitation.

Snowfall

January through April, October through December are months with snowfall. In December, it is snowing for 3.9 days. Throughout December, 1.73" (44mm) of snow is accumulated. Throughout the year, there are 21 snowfall days, and 10.91" (277mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 30min of daylight.
On the first day of the month, sunrise is at 7:10 am and sunset at 4:50 pm. On the last day of December, sunrise is at 7:28 am and sunset at 5:00 pm CST.

Sunshine

The average sunshine in December is 5.2h.

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 estimate of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index of 2 during December translates into the following directions:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. 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. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.

Frequently asked questions

How cold is December?

An average high-temperature, in December, in Fortuna, is 41.7°F (5.4°C) and the average low-temperature is 28.6°F (-1.9°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which combines air temperature and relative humidity, in August is evaluated at 96.8°F (36°C).

What is the average humidity in December?

In Fortuna, the average relative humidity in December is 76%.

How many days does it rain in December?

In Fortuna, in December, during 6.6 rainfall days, 1.57" (40mm) of precipitation is typically accumulated.

How many days does it snow in December?

In Fortuna, in December, snow falls for 3.9 days, with typically accumulated 1.73" (44mm) of snow.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 30min of daylight.

What is the average length of the day in December?

In December, the average day length in Fortuna, Missouri, is 9h and 32min.

When is the sunrise / sunset in December?

On the first day of December, sunrise is at 7:10 am and sunset at 4:50 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 5:00 pm CST.

How long on average sun shines in December in Fortuna?

The average sunshine duration in December is 5.2h.

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

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

What is the UV index reading in December?

The average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a low health threat from unsafe 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
Fortuna, MO

Average temperature in December - Fortuna, MO
  • Average high temperature in December: 41.7°F

The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (37.4°F).

  • Average low temperature in December: 28.6°F

The month with the highest average low temperature is July (68°F).
The coldest month (with the lowest average low temperature) is January (23.7°F).

Average pressure in December
Fortuna, MO

Average pressure in December - Fortuna, MO
  • Average pressure in December: 30.13"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in December
Fortuna, MO

Average wind speed in December - Fortuna, MO
  • Average wind speed in December: 9.1mph

The windiest months (with the highest average wind speed) are January and March (9.5mph).
The calmest month (with the lowest average wind speed) is July (6.2mph).

Average humidity in December
Fortuna, MO

Average humidity in December - Fortuna, MO
  • Average humidity in December: 76%

The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (72%).

Average rainfall in December
Fortuna, MO

Average rainfall in December - Fortuna, MO
  • Average rainfall in December: 1.57"

The wettest month (with the highest rainfall) is May (4.25").
The driest month (with the least rainfall) is January (1.3").

Average rainfall days in December
Fortuna, MO

Average rainfall days in December - Fortuna, MO
  • Average rainfall days in December: 6.6 days

The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is January (6.2 days).

Average snowfall in December
Fortuna, MO

Average snowfall in December - Fortuna, MO
  • Average snowfall in December: 1.73"

The month with the highest snowfall is February (3.46").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in December
Fortuna, MO

Average snowfall days in December - Fortuna, MO
  • Average snowfall days in December: 3.9 days

The month with the highest number of snowfall days is February (6.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Fortuna, MO

Average daylight in December / Average sunshine in December - Fortuna, MO
  • Average daylight in December: 9h and 3min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in December: 5h and 1min

The month with the most sunshine is June (Average sunshine: 10h and 36min).
The months with the least sunshine are January and February (Average sunshine: 4h and 54min).

Average sunshine days in December
Fortuna, MO

Average sunshine days in December - Fortuna, MO
  • Average sunshine days in December: 20.3 days

The month with the most sunshine days is December (20.3 days).
The month with the least sunshine days is May (10.9 days).

Average UV index in December
Fortuna, MO

Average UV index in December - Fortuna, MO
  • Average UV index in December: 2

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in December
Fortuna, MO

Average cloud cover in December - Fortuna, MO
  • Average cloud cover in December: 45

The month with the most cloud cover is February (Cloud cover 48).
The months with the least cloud cover are June and August (Cloud cover 27).

Average visibility in December
Fortuna, MO

Average visibility in December - Fortuna, MO
  • 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).

Fortuna, Missouri, USA

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