December weather forecast and climate
Olathe, KS

December, the first month of the winter, in Olathe, is still a cold month, with average temperature fluctuating between 27.9°F (-2.3°C) and 41.7°F (5.4°C).

Temperature

In December, the average high-temperature decreases, from a cool 53.2°F (11.8°C) in November, to a cold 41.7°F (5.4°C). The average low-temperature, in Olathe, Kansas, is 27.9°F (-2.3°C).

Humidity

In December, the average relative humidity in Olathe is 73%.

Rainfall

In December, in Olathe, the rain falls for 5.9 days. Throughout December, 1.42" (36mm) of precipitation is accumulated. In Olathe, during the entire year, the rain falls for 137 days and collects up to 28.7" (729mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in Olathe. In Olathe, during December, snow falls for 3.7 days and regularly aggregates up to 1.14" (29mm) of snow. In Olathe, Kansas, during the entire year, snow falls for 20.8 days, and aggregates up to 9.61" (244mm) of snow.

Daylight

With an average of 9.5h of daylight, December has the shortest days of the year.

Sunshine

In December, the average sunshine is 5.5h.

UV index

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 unsafe exposure to the UV radiation for ordinary individuals.
Note: The daily maximum UV index of 2 interpret into the following advice:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in December in Olathe?

In December, in Olathe, Kansas, the average high-temperature is 41.7°F (5.4°C), and the average low-temperature is 27.9°F (-2.3°C).

What is the average humidity in December in Olathe?

The average relative humidity in December is 73%.

How many days does it rain in December in Olathe?

In Olathe, in December, it is raining for 5.9 days, with typically 1.42" (36mm) of accumulated precipitation.

How much does it snow in Olathe in December?

In Olathe, in December, during 3.7 snowfall days, 1.14" (29mm) of snow is typically accumulated.

What is the month with the shortest days in Olathe?

December has the shortest days of the year in Olathe, Kansas, with an average of 9.5h of daylight.

How many hours of daylight does Olathe have in December?

In Olathe, the average length of the day in December is 9.5h.

How long on average sun shines in December in Olathe?

In December, the average sunshine in Olathe, Kansas, is 5.5h.

What are the months with the lowest UV index in Olathe?

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

What is the UV index reading in December in Olathe?

In Olathe, the average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a low health risk from the exposure to the Sun's UV radiation.
Average temperature in December - Olathe, KS
  • Average high temperature in December: 41.7°F

The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is January (37.6°F).

  • Average low temperature in December: 27.9°F

The month with the highest average low temperature is July (69.3°F).
The coldest month (with the lowest average low temperature) is January (23°F).

Average pressure in December - Olathe, KS
  • Average pressure in December: 30.13"

The month with the highest atmospheric pressure is January (30.17").
The month with the lowest atmospheric pressure is June (29.89").

Average wind speed in December - Olathe, KS
  • Average wind speed in December: 9.5mph

The windiest month (with the highest average wind speed) is March (10.2mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).

Average humidity in December - Olathe, KS
  • Average humidity in December: 73%

The month with the highest relative humidity is May (79%).
Months with the lowest relative humidity are October and November (70%).

Average rainfall in December - Olathe, KS
  • Average rainfall in December: 1.42"

The wettest month (with the highest rainfall) is May (4.69").
The driest month (with the least rainfall) is January (1.06").

Average rainfall days in December - Olathe, KS
  • Average rainfall days in December: 5.9 days

The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is February (5.8 days).

Average snowfall in December - Olathe, KS
  • Average snowfall in December: 1.14"

The month with the highest snowfall is February (3.78").
Months with the least snowfall are June, July, August and September (0").

Average snowfall days in December - Olathe, KS
  • Average snowfall days in December: 3.7 days

The month with the highest number of snowfall days is February (6.7 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December / Average sunshine in December - Olathe, KS
  • Average daylight in December: 9.5h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in December: 5.5h

Months with the most sunshine are June and July (Average sunshine: 10.5h).
The month with the least sunshine is January (Average sunshine: 5.3h).

Average sunshine days in December - Olathe, KS
  • Average sunshine days in December: 20.9 days

The month with the most sunshine days is December (20.9 days).
The month with the least sunshine days is May (11.2 days).

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

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

Average cloud cover in December - Olathe, KS
  • Average cloud cover in December: 40

The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 25).

Average visibility in December - Olathe, KS
  • Average visibility in December: 6mi

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