December weather forecast
Alton, FL

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Weather in December

December, the first month of the winter in Alton, is still a comfortable month, with an average temperature varying between 65.8°F (18.8°C) and 48.7°F (9.3°C).

Temperature

The start of December comes with a small reduction in the average high-temperature, subtly receding from an agreeable 71.2°F (21.8°C) in November to a comfortable 65.8°F (18.8°C). The nighttime temperature in Alton, during December, averages of 48.7°F (9.3°C).

Humidity

August, September and December, with an average relative humidity of 77%, are the most humid months.

Rainfall

In Alton, in December, during 9.9 rainfall days, 2.2" (56mm) of precipitation is typically accumulated. In Alton, during the entire year, the rain falls for 173.6 days and collects up to 31.3" (795mm) of precipitation.

Snowfall

January, March through December are months without snowfall.

Daylight

The month with the shortest days is December, with an average of 10h and 12min of daylight.
On the first day of December, sunrise is at 7:11 am and sunset at 5:32 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 5:43 pm EST.

Sunshine

The month with the least sunshine is December, with an average of 5.8h of sunshine.

UV index

In December, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum daily UV index of 4 in December converts into the following recommendations:
Adopt protective measures - It is advised to guard against sun damage. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Experience reduced UV exposure by about half when donning a wide-brim hat.
Updated: Aug 31, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average December temperature?

Alton in December has an average high-temperature of 65.8°F (18.8°C) and an average low-temperature of 48.7°F (9.3°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which combines relative humidity and air temperature, in October is calculated to be 86°F (30°C).

What are the most humid months in Alton?

The months with the highest humidity are August, September and December, with an average relative humidity of 77%.

What is the average humidity in December?

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

How many days does it rain in December?

In Alton, in December, during 9.9 rainfall days, 2.2" (56mm) of precipitation is typically accumulated.

When it does not snow?

January, March through December are months without snowfall.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 10h and 12min of daylight.

How many hours of daylight does Alton have in December?

In December, the average day length is 10h and 15min.

What time are sunrise and sunset in December?

On the first day of December, sunrise is at 7:11 am and sunset at 5:32 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 5:43 pm EST.

What is the month with the least sunshine?

The month with the least sunshine is December, with an average of 5.8h of sunshine.

How long on average sun shines in December?

The average sunshine duration in December in Alton is 5.8h.

What is the UV index reading in December?

In Alton, the average daily maximum UV index in December is 4. A UV Index estimate of 3 to 5 represents a medium hazard to health from exposure to the Sun's UV radiation.
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
Alton, FL

Average temperature in December - Alton, FL
  • Average high temperature in December: 65.8°F

The warmest months (with the highest average high temperature) are July and August (91.2°F).
The month with the lowest average high temperature is January (62.2°F).

  • Average low temperature in December: 48.7°F

The month with the highest average low temperature is August (74.8°F).
The coldest month (with the lowest average low temperature) is January (44.2°F).

Average pressure in December
Alton, FL

Average pressure in December - Alton, FL
  • Average pressure in December: 30.13"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.98"Hg).

Average wind speed in December
Alton, FL

Average wind speed in December - Alton, FL
  • Average wind speed in December: 5.9mph

The windiest months (with the highest average wind speed) are March and April (6.5mph).
The calmest months (with the lowest average wind speed) are July and August (4.8mph).

Average humidity in December
Alton, FL

Average humidity in December - Alton, FL
  • Average humidity in December: 77%

The months with the highest relative humidity are August, September and December (77%).
The month with the lowest relative humidity is May (70%).

Average rainfall in December
Alton, FL

Average rainfall in December - Alton, FL
  • Average rainfall in December: 2.2"

The wettest month (with the highest rainfall) is August (4.57").
The driest month (with the least rainfall) is November (1.14").

Average rainfall days in December
Alton, FL

Average rainfall days in December - Alton, FL
  • Average rainfall days in December: 9.9 days

The month with the highest number of rainy days is August (25.5 days).
The month with the least rainy days is November (7.2 days).

Average snowfall days in December
Alton, FL

Average snowfall days in December - Alton, FL
  • Average snowfall days in December: 0 days

The month with the highest number of snowfall days is February (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).

Average daylight in December /
Average sunshine in December
Alton, FL

Average daylight in December / Average sunshine in December - Alton, FL
  • Average daylight in December: 10h and 1min

The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).

  • Average sunshine in December: 5h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).

Average sunshine days in December
Alton, FL

Average sunshine days in December - Alton, FL
  • Average sunshine days in December: 20 days

The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is August (4.3 days).

Average UV index in December
Alton, FL

Average UV index in December - Alton, FL
  • Average UV index in December: 4

The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is January (UV index 3).

Average cloud cover in December
Alton, FL

Average cloud cover in December - Alton, FL
  • Average cloud cover in December: 40

The month with the most cloud cover is December (Cloud cover 40).
The month with the least cloud cover is October (Cloud cover 29).

Average visibility in December
Alton, FL

Average visibility in December - Alton, FL
  • Average visibility in December: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, October, November and December (6mi).
The month with the lowest visibility is September (5mi).

Alton, Florida, USA

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