December weather forecast and climate
Trenton, MO

The first month of the winter, December, is also a wintry month in Trenton, Missouri, with average temperature varying between 38.1°F (3.4°C) and 25.2°F (-3.8°C).

Temperature

In Trenton, the average high-temperature drops, from a fresh 50.5°F (10.3°C) in November, to a wintry 38.1°F (3.4°C). The average low-temperature, in Trenton, is 25.2°F (-3.8°C).

Humidity

In December, the average relative humidity is 78%.

Rainfall

In Trenton, during December, the rain falls for 6 days and regularly aggregates up to 1.22" (31mm) of precipitation. Throughout the year, in Trenton, there are 131.5 rainfall days, and 26.85" (682mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. In Trenton, during December, snow falls for 4.6 days and regularly aggregates up to 1.26" (32mm) of snow. Throughout the year, there are 22.4 snowfall days, and 11.18" (284mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9.4h of daylight.

Sunshine

In December, the average sunshine in Trenton is 5h.

UV index

Months with the lowest UV index in Trenton, Missouri, are January, February, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health hazard from the exposure to the Sun's UV rays for average individuals.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
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. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the temperature in December in Trenton?

The average high-temperature, in December, in Trenton, is 38.1°F (3.4°C), while the average low-temperature is 25.2°F (-3.8°C).

What is the average humidity in December in Trenton?

In Trenton, the average relative humidity in December is 78%.

How much does it rain in Trenton in December?

In Trenton, during December, the rain falls for 6 days and regularly aggregates up to 1.22" (31mm) of precipitation.

How much does it snow in Trenton in December?

In Trenton, in December, during 4.6 snowfall days, 1.26" (32mm) of snow is typically accumulated.

What is the month with the shortest days in Trenton?

The month with the shortest days in Trenton, Missouri, is December, with an average of 9.4h of daylight.

How many hours of daylight does Trenton have in December?

The average length of the day in December in Trenton is 9.4h.

How many hours of sunshine does Trenton have in December?

In Trenton, Missouri, the average sunshine in December is 5h.

When is the lowest UV index in Trenton?

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

What is the UV index intensity in December in Trenton?

In Trenton, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to the Sun's UV rays.
Average temperature in December - Trenton, MO
  • Average high temperature in December: 3.4°C

The warmest month (with the highest average high temperature) is July (29.2°C).
The month with the lowest average high temperature is January (0.6°C).

  • Average low temperature in December: -3.8°C

The month with the highest average low temperature is July (19.5°C).
The coldest month (with the lowest average low temperature) is January (-7.1°C).

Average pressure in December - Trenton, MO
  • Average pressure in December: 1020.2mbar

The month with the highest atmospheric pressure is January (1021.5mbar).
The month with the lowest atmospheric pressure is June (1012.2mbar).

Average wind speed in December - Trenton, MO
  • Average wind speed in December: 14.8km/h

The windiest month (with the highest average wind speed) is March (16.1km/h).
The calmest month (with the lowest average wind speed) is August (10.3km/h).

Average humidity in December - Trenton, MO
  • Average humidity in December: 78%

The month with the highest relative humidity is June (81%).
The month with the lowest relative humidity is October (71%).

Average rainfall in December - Trenton, MO
  • Average rainfall in December: 31mm

The wettest month (with the highest rainfall) is June (99mm).
The driest month (with the least rainfall) is January (24mm).

Average rainfall days in December - Trenton, MO
  • Average rainfall days in December: 6 days

The month with the highest number of rainy days is May (16.5 days).
The month with the least rainy days is February (4.4 days).

Average snowfall in December - Trenton, MO
  • Average snowfall in December: 32mm

The month with the highest snowfall is January (94mm).
Months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in December - Trenton, MO
  • Average snowfall days in December: 4.6 days

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

Average daylight in December / Average sunshine in December - Trenton, MO
  • Average daylight in December: 9.4h

The month with the longest days is June (Average daylight: 15h).
The month with the shortest days is December (Average daylight: 9.4h).

  • Average sunshine in December: 5h

The month with the most sunshine is July (Average sunshine: 10.4h).
The month with the least sunshine is January (Average sunshine: 4.7h).

Average sunshine days in December - Trenton, MO
  • Average sunshine days in December: 20.5 days

The month with the most sunshine days is December (20.5 days).
The month with the least sunshine days is May (11.8 days).

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

Months with the highest UV index are 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 - Trenton, MO
  • Average cloud cover in December: 45

Months with the most cloud cover are January and March (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 28).

Average visibility in December - Trenton, MO
  • Average visibility in December: 9km

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).