January weather forecast
Mount Vernon, IA

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Weather in January

January, like December, is another subzero cold winter month in Mount Vernon, Iowa, with temperature in the range of an average high of 26.2°F (-3.2°C) and an average low of 14.2°F (-9.9°C).

Temperature

The coldest time of the year is January, with temperatures averaging a high of 26.2°F (-3.2°C) and a low of 14.2°F (-9.9°C).

Humidity

The most humid month in Mount Vernon is January, with an average relative humidity of 85%.

Rainfall

The month with the least rainfall is January, when the rain falls for 5.2 days and typically collects 1.34" (34mm) of precipitation.

Snowfall

Months with snowfall in Mount Vernon are January through April, October through December. The month with the most snowfall in Mount Vernon, Iowa, is January, when snow falls for 12.7 days and typically aggregates up to 5.79" (147mm) of snow.

Daylight

In Mount Vernon, Iowa, the average length of the day in January is 9h and 32min.
On the first day of January in Mount Vernon, sunrise is at 7:33 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 5:18 pm CST.

Sunshine

With an average of 4h of sunshine, January has the least sunshine of the year in Mount Vernon.

UV index

In Mount Vernon, the average daily maximum UV index in January is 2. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: In January, an average UV index of 2 transforms into the following instructions:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
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Frequently asked questions

What is the coldest time of year in Mount Vernon?

In Mount Vernon, Iowa, the average lowest temperatures are observed in January, with a high of 26.2°F (-3.2°C) and a low of 14.2°F (-9.9°C).

How cold is it in Mount Vernon in January?

The average high-temperature, in January, in Mount Vernon, is 26.2°F (-3.2°C), while the average low-temperature is 14.2°F (-9.9°C).

What is the most humid month in Mount Vernon?

With an average relative humidity of 85%, January is the most humid month.

What is the average humidity in January in Mount Vernon?

In Mount Vernon, Iowa, the average relative humidity in January is 85%.

What is the driest month in Mount Vernon?

January is the month with the least rainfall. Rain falls for 5.2 days and accumulates 1.34" (34mm) of precipitation.

How many days does it rain in January in Mount Vernon?

In Mount Vernon, in January, it is raining for 5.2 days, with typically 1.34" (34mm) of accumulated precipitation.

What is the snowiest month in Mount Vernon?

January is the month with the most snowfall. Snow falls for 12.7 days and accumulates 5.79" (147mm) of snow.

How many days does it snow in January in Mount Vernon?

In Mount Vernon, Iowa, in January, snow falls for 12.7 days, with typically accumulated 5.79" (147mm) of snow.

What is the average length of the day in January in Mount Vernon?

The average day length in January is 9h and 32min.

What time are sunrise and sunset in January in Mount Vernon?

On the first day of January in Mount Vernon, sunrise is at 7:33 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 5:18 pm CST.

What is the month with the least sunshine in Mount Vernon?

With an average of 4h of sunshine, January has the least sunshine of the year in Mount Vernon.

How long on average sun shines in January in Mount Vernon?

The average sunshine duration in January in Mount Vernon is 4h.

How high is the UV index in January in Mount Vernon?

The average daily maximum UV index in January in Mount Vernon, Iowa, is 2. A UV Index of 2, and less, symbolizes a low health threat from unprotected exposure to UV radiation.
Today
Tomorrow
Long-term
YearJanuaryFMAMJJASOND
Dec
January
Feb
Average high temperature
33.1°F 0.6°C
26.2°F -3.2°C
30.6°F -0.8°C
Average low temperature
22.3°F -5.4°C
14.2°F -9.9°C
17.4°F -8.1°C
Average pressure
30.11" 765mmHg
30.14" 766mmHg
30.12" 765mmHg
Average wind speed
10mph 16.1km/h
10.6mph 17.1km/h
10.6mph 17.1km/h
Average max. wind speed
10.7mph 17.2km/h
11.2mph 18km/h
11.2mph 18km/h
Average wind speed gusts
15.8mph 25.4km/h
16.7mph 26.9km/h
16.6mph 26.7km/h
Average humidity
81%
85%
83%
Average rainfall
1.57" 40mm
1.34" 34mm
1.38" 35mm
Average rainfall days
6.8
5.2
5.2
Average snowfall
3.11" 79mm
5.79" 147mm
5.04" 128mm
Average snowfall days
9.5
12.7
10.3
Average daylight
9h 1min
9h 3min
10h 4min
Average sunshine
4h 2min
4h 0min
4h 1min
Average sunshine days
16.8
15.5
14
Average UV index
1
2
2
Average cloud cover
55%
58%
56%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in January
Mount Vernon, IA

Average temperature in January - Mount Vernon, IA
  • Average high temperature in January: 26.2°F

The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (26.2°F).

  • Average low temperature in January: 14.2°F

The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (14.2°F).

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Average pressure in January
Mount Vernon, IA

Average pressure in January - Mount Vernon, IA
  • Average pressure in January: 30.14"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

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Average wind speed in January
Mount Vernon, IA

Average wind speed in January - Mount Vernon, IA
  • Average wind speed in January: 10.6mph

The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).

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Average humidity in January
Mount Vernon, IA

Average humidity in January - Mount Vernon, IA
  • Average humidity in January: 85%

The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (73%).

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Average rainfall in January
Mount Vernon, IA

Average rainfall in January - Mount Vernon, IA
  • Average rainfall in January: 1.34"

The wettest month (with the highest rainfall) is May (5").
The driest month (with the least rainfall) is January (1.34").

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Average rainfall days in January
Mount Vernon, IA

Average rainfall days in January - Mount Vernon, IA
  • Average rainfall days in January: 5.2 days

The month with the highest number of rainy days is May (19 days).
The months with the least rainy days are January and February (5.2 days).

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Average snowfall in January
Mount Vernon, IA

Average snowfall in January - Mount Vernon, IA
  • Average snowfall in January: 5.79"

The month with the highest snowfall is January (5.79").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in January
Mount Vernon, IA

Average snowfall days in January - Mount Vernon, IA
  • Average snowfall days in January: 12.7 days

The month with the highest number of snowfall days is January (12.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in January /
Average sunshine in January
Mount Vernon, IA

Average daylight in January / Average sunshine in January - Mount Vernon, IA
  • Average daylight in January: 9h and 3min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in January: 4h and 0min

The months with the most sunshine are July and August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).

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Average sunshine days in January
Mount Vernon, IA

Average sunshine days in January - Mount Vernon, IA
  • Average sunshine days in January: 15.5 days

The month with the most sunshine days is November (17 days).
The month with the least sunshine days is June (8.1 days).

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Average UV index in January
Mount Vernon, IA

Average UV index in January - Mount Vernon, IA
  • Average UV index in January: 2

The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).

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Average cloud cover in January
Mount Vernon, IA

Average cloud cover in January - Mount Vernon, IA
  • Average cloud cover in January: 58

The month with the most cloud cover is January (Cloud cover 58).
The months with the least cloud cover are August and September (Cloud cover 31).

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Average visibility in January
Mount Vernon, IA

Average visibility in January - Mount Vernon, IA
  • Average visibility in January: 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).

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Mount Vernon, Iowa, USA

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