December weather forecast
Portis, KS

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Weather in December

December, the first month of the winter in Portis, is also an icy month, with an average temperature ranging between max 40.6°F (4.8°C) and min 25.5°F (-3.6°C).

Temperature

As November transitions into December, Portis sees a drop in the average high-temperature, transitioning from a cool 54°F (12.2°C) to a cold 40.6°F (4.8°C). Portis registers a consistent average low-temperature of 25.5°F (-3.6°C) during December.

Humidity

January and December, with an average relative humidity of 69%, are the most humid months.

Rainfall

In Portis, in December, during 4.3 rainfall days, 1.14" (29mm) of precipitation is typically accumulated. In Portis, Kansas, during the entire year, the rain falls for 110.3 days and collects up to 19.76" (502mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in Portis. In Portis, during December, snow falls for 4.7 days and regularly aggregates up to 1.5" (38mm) of snow. Throughout the year, in Portis, there are 22.6 snowfall days, and 8.5" (216mm) of snow is accumulated.

Daylight

With an average of 9h and 24min of daylight, December has the shortest days of the year in Portis.
On the first day of the month, sunrise is at 7:36 am and sunset at 5:11 pm. On the last day of December, in Portis, sunrise is at 7:55 am and sunset at 5:21 pm CST.

Sunshine

December has the least sunshine of the year in Portis, with an average of 6h of sunshine.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: An average UV index of 2 in December transforms into this advice:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
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Frequently asked questions

How cold is it in Portis in December?

The average high-temperature, in December, in Portis, is 40.6°F (4.8°C), while the average low-temperature is 25.5°F (-3.6°C). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, in September is estimated at 84.2°F (29°C).

What are the most humid months in Portis?

January and December, with an average relative humidity of 69%, are most humid months.

What is the average humidity in December in Portis?

In December, the average relative humidity in Portis is 69%.

How many days does it rain in December in Portis?

In Portis, Kansas, in December, during 4.3 rainfall days, 1.14" (29mm) of precipitation is typically accumulated.

How much does it snow in Portis in December?

In Portis, during December, snow falls for 4.7 days and regularly aggregates up to 1.5" (38mm) of snow.

What is the month with the shortest days in Portis?

The month with the shortest days in Portis, Kansas, is December, with an average of 9h and 24min of daylight.

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

The average day length in December in Portis, Kansas, is 9h and 26min.

When are sunrise and sunset in December in Portis?

On the first day of December in Portis, sunrise is at 7:36 am and sunset at 5:11 pm. On the last day of the month, sunrise is at 7:55 am and sunset at 5:21 pm CST.

What is the month with the least sunshine in Portis?

The month with the least sunshine in Portis, Kansas, is December, with an average of 6h of sunshine.

How long on average sun shines in December in Portis?

In Portis, the average sunshine duration in December is 6h.

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

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

How high is the UV index in December in Portis?

In Portis, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a low health threat 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
Portis, KS

Average temperature in December - Portis, KS
  • Average high temperature in December: 40.6°F

The warmest month (with the highest average high temperature) is July (92.5°F).
The month with the lowest average high temperature is January (39.9°F).

  • Average low temperature in December: 25.5°F

The month with the highest average low temperature is July (70.5°F).
The coldest month (with the lowest average low temperature) is January (23.9°F).

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Average pressure in December
Portis, KS

Average pressure in December - Portis, KS
  • Average pressure in December: 30.14"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).

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Average wind speed in December
Portis, KS

Average wind speed in December - Portis, KS
  • Average wind speed in December: 10mph

The windiest month (with the highest average wind speed) is April (11.7mph).
The calmest month (with the lowest average wind speed) is August (8.9mph).

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Average humidity in December
Portis, KS

Average humidity in December - Portis, KS
  • Average humidity in December: 69%

The months with the highest relative humidity are January and December (69%).
The month with the lowest relative humidity is July (57%).

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Average rainfall in December
Portis, KS

Average rainfall in December - Portis, KS
  • Average rainfall in December: 1.14"

The wettest month (with the highest rainfall) is May (3.74").
The driest month (with the least rainfall) is January (0.59").

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Average rainfall days in December
Portis, KS

Average rainfall days in December - Portis, KS
  • Average rainfall days in December: 4.3 days

The month with the highest number of rainy days is May (14.4 days).
The month with the least rainy days is January (3.8 days).

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Average snowfall in December
Portis, KS

Average snowfall in December - Portis, KS
  • Average snowfall in December: 1.5"

The month with the highest snowfall is February (2.2").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Portis, KS

Average snowfall days in December - Portis, KS
  • Average snowfall days in December: 4.7 days

The month with the highest number of snowfall days is February (6.3 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
Portis, KS

Average daylight in December / Average sunshine in December - Portis, KS
  • Average daylight in December: 9h and 2min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in December: 6h and 0min

The month with the most sunshine is June (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).

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Average sunshine days in December
Portis, KS

Average sunshine days in December - Portis, KS
  • Average sunshine days in December: 22.2 days

The month with the most sunshine days is November (23.5 days).
The month with the least sunshine days is May (13.5 days).

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Average UV index in December
Portis, KS

Average UV index in December - Portis, KS
  • Average UV index in December: 2

The months with the highest UV index are June and 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
Portis, KS

Average cloud cover in December - Portis, KS
  • Average cloud cover in December: 33

The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is June (Cloud cover 21).

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Average visibility in December
Portis, KS

Average visibility in December - Portis, KS
  • 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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Portis, Kansas, USA

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