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
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.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December?
How many days does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When is the sunrise / sunset in December?
How long on average sun shines in December in Fortuna?
What is the month with the lowest UV index in Fortuna?
What is the UV index reading in December?
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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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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