December weather forecast
Glasgow, IA

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Weather in December

The first month of the winter, December, is also a wintry month in Glasgow, Iowa, with temperature in the range of an average low of 24.6°F (-4.1°C) and an average high of 36°F (2.2°C).

Temperature

A change in temperatures is noted as November gives way to December, with average highs reducing from a frosty 48°F (8.9°C) to an icy 36°F (2.2°C). During the month of December, Glasgow's nighttime temperature lowers to an average of 24.6°F (-4.1°C).

Humidity

The average relative humidity in December in Glasgow is 80%.

Rainfall

The months with the least rainfall in Glasgow are February and December Rain falls for 7.3 days and accumulates 1.38" (35mm) of rain.

Snowfall

January through April, October through December are months with snowfall. In December, it is snowing for 6 days. Throughout December, 1.65" (42mm) of snow is accumulated. In Glasgow, during the entire year, snow falls for 30.7 days and aggregates up to 15" (381mm) of snow.

Daylight

The month with the shortest days is December, with an average of 9h and 18min of daylight.
On the first day of the month, sunrise is at 7:13 am and sunset at 4:39 pm. On the last day of December, sunrise is at 7:31 am and sunset at 4:49 pm CST.

Sunshine

In Glasgow, the average sunshine in December is 4.5h.

UV index

In Glasgow, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: A typical high UV index of 2 in December suggests the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Updated: Aug 16, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is December?

Glasgow in December has an average high-temperature of 36°F (2.2°C) and an average low-temperature of 24.6°F (-4.1°C). In August, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which represents the influence of relative humidity on air temperature, is estimated at 87.8°F (31°C).

What is the average humidity in December?

In Glasgow, the average relative humidity in December is 80%.

What is the driest month?

February and December are months with the least rain when the rain falls for 7.3 days and typically aggregates up to 1.38" (35mm) of rain.

How many days does it rain in December?

In Glasgow, in December, it is raining for 7.3 days, with typically 1.38" (35mm) of accumulated precipitation.

How many days does it snow in December?

In Glasgow, in December, during 6 snowfall days, 1.65" (42mm) of snow is typically accumulated.

What is the month with the shortest days in Glasgow?

The month with the shortest days is December, with an average of 9h and 18min of daylight.

How many hours of daylight does Glasgow have in December?

In December, the average day length is 9h and 17min.

When is the sunrise / sunset in December?

In December, on the first day of the month, sunrise is at 7:13 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 7:31 am and sunset at 4:49 pm CST.

How many hours of sunshine does Glasgow have in December?

In December, the average sunshine duration is 4.5h.

How high is the UV index in December?

In Glasgow, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to Sun's UV rays.
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
Glasgow, IA

Average temperature in December - Glasgow, IA
  • Average high temperature in December: 36°F

The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (29.7°F).

  • Average low temperature in December: 24.6°F

The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).

Average pressure in December
Glasgow, IA

Average pressure in December - Glasgow, IA
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

Average wind speed in December
Glasgow, IA

Average wind speed in December - Glasgow, IA
  • Average wind speed in December: 10.1mph

The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (6.9mph).

Average humidity in December
Glasgow, IA

Average humidity in December - Glasgow, IA
  • Average humidity in December: 80%

The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).

Average rainfall in December
Glasgow, IA

Average rainfall in December - Glasgow, IA
  • Average rainfall in December: 1.38"

The wettest month (with the highest rainfall) is May (4.29").
The driest months (with the least rainfall) are February and December (1.38").

Average rainfall days in December
Glasgow, IA

Average rainfall days in December - Glasgow, IA
  • Average rainfall days in December: 7.3 days

The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is February (4.6 days).

Average snowfall in December
Glasgow, IA

Average snowfall in December - Glasgow, IA
  • Average snowfall in December: 1.65"

The month with the highest snowfall is January (4.76").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in December
Glasgow, IA

Average snowfall days in December - Glasgow, IA
  • Average snowfall days in December: 6 days

The month with the highest number of snowfall days is January (9.6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Glasgow, IA

Average daylight in December / Average sunshine in December - Glasgow, IA
  • Average daylight in December: 9h and 2min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in December: 4h and 3min

The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).

Average sunshine days in December
Glasgow, IA

Average sunshine days in December - Glasgow, IA
  • Average sunshine days in December: 18 days

The month with the most sunshine days is October (18.4 days).
The month with the least sunshine days is May (10.6 days).

Average UV index in December
Glasgow, IA

Average UV index in December - Glasgow, IA
  • Average UV index in December: 2

The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).

Average cloud cover in December
Glasgow, IA

Average cloud cover in December - Glasgow, IA
  • Average cloud cover in December: 53

The month with the most cloud cover is January (Cloud cover 56).
The months with the least cloud cover are July, August and September (Cloud cover 31).

Average visibility in December
Glasgow, IA

Average visibility in December - Glasgow, IA
  • Average visibility in December: 6mi

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

Glasgow, Iowa, USA

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