January weather forecast
Walnut, IA

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Weather in January

January, like December, is another subzero cold winter month in Walnut, Iowa, with an average temperature ranging between max 28.8°F (-1.8°C) and min 15.4°F (-9.2°C).

Temperature

Walnut, Iowa, experiences its lowest average temperatures in January, reaching a peak of 28.8°F (-1.8°C) and a minimum of 15.4°F (-9.2°C).

Humidity

January is the most humid month, with an average relative humidity of 82%.

Rainfall

The month with the least rainfall is January, when the rain falls for 5.1 days and typically collects 0.87" (22mm) of precipitation.

Snowfall

Months with snowfall in Walnut, Iowa, are January through May, October through December. In Walnut, during January, snow falls for 9.8 days and regularly aggregates up to 3.62" (92mm) of snow. Throughout the year, there are 35.8 snowfall days, and 13.82" (351mm) of snow is accumulated.

Daylight

In January, the average length of the day is 9h and 35min.
On the first day of the month, sunrise is at 7:47 am and sunset at 5:01 pm. On the last day of January, sunrise is at 7:33 am and sunset at 5:35 pm CST.

Sunshine

With an average of 4.6h of sunshine, January has the least sunshine of the year in Walnut, Iowa.

UV index

The months with the lowest UV index in Walnut are January, February, October through December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for the average person.
Note: In January, the maximum UV index of 2 suggests this advice:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. 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. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
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Frequently asked questions

What is the coldest month in Walnut?

January, having an average high-temperature of 28.8°F (-1.8°C) and an average low-temperature of 15.4°F (-9.2°C), is the coldest month in Walnut, Iowa.

How cold is it in Walnut in January?

The high-temperature, in January, in Walnut, is 28.8°F (-1.8°C), while the low-temperature averages to 15.4°F (-9.2°C).

What is the most humid month in Walnut?

With an average relative humidity of 82%, January is the most humid month in Walnut, Iowa.

What is the average humidity in January in Walnut?

In January, the average relative humidity in Walnut is 82%.

What is the driest month in Walnut?

January is the month with the least rainfall. Rain falls for 5.1 days and accumulates 0.87" (22mm) of precipitation.

How much does it rain in Walnut in January?

In Walnut, Iowa, in January, it is raining for 5.1 days, with typically 0.87" (22mm) of accumulated precipitation.

How many days does it snow in January in Walnut?

In January, in Walnut, Iowa, it is snowing for 9.8 days. Throughout January, 3.62" (92mm) of snow is accumulated.

What is the average length of the day in January in Walnut?

The average day length in January in Walnut, Iowa, is 9h and 35min.

When are sunrise and sunset in January in Walnut?

On the first day of January, sunrise is at 7:47 am and sunset at 5:01 pm. On the last day of the month, sunrise is at 7:33 am and sunset at 5:35 pm CST.

What is the month with the least sunshine in Walnut?

With an average of 4.6h of sunshine, January has the least sunshine of the year in Walnut.

How long on average sun shines in January in Walnut?

In Walnut, Iowa, the average sunshine duration in January is 4.6h.

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

January, February, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Walnut.

What is the UV index reading in January in Walnut?

In January, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a low health threat from exposure to the Sun's UV radiation.
Today
Tomorrow
Long-term
YearJanuaryFMAMJJASOND
Dec
January
Feb
Average high temperature
33.4°F 0.8°C
28.8°F -1.8°C
32.4°F 0.2°C
Average low temperature
21.4°F -5.9°C
15.4°F -9.2°C
18.5°F -7.5°C
Average pressure
30.13" 765mmHg
30.16" 766mmHg
30.14" 766mmHg
Average wind speed
9.9mph 15.9km/h
10.3mph 16.6km/h
10.4mph 16.7km/h
Average max. wind speed
10.6mph 17.1km/h
11.1mph 17.9km/h
11.1mph 17.9km/h
Average wind speed gusts
16mph 25.7km/h
16.7mph 26.9km/h
16.3mph 26.2km/h
Average humidity
79%
82%
81%
Average rainfall
1.61" 41mm
0.87" 22mm
0.98" 25mm
Average rainfall days
5.2
5.1
3.6
Average snowfall
2.72" 69mm
3.62" 92mm
3.7" 94mm
Average snowfall days
8.5
9.8
8.3
Average daylight
9h 1min
9h 4min
10h 4min
Average sunshine
4h 5min
4h 4min
5h 2min
Average sunshine days
18.7
17.8
15.7
Average UV index
2
2
2
Average cloud cover
47%
51%
48%
Average visibility
6mi 9.7km
5mi 8km
6mi 9.7km

Average temperature in January
Walnut, IA

Average temperature in January - Walnut, IA
  • Average high temperature in January: 28.8°F

The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (28.8°F).

  • Average low temperature in January: 15.4°F

The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (15.4°F).

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Average pressure in January
Walnut, IA

Average pressure in January - Walnut, IA
  • Average pressure in January: 30.16"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).

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Average wind speed in January
Walnut, IA

Average wind speed in January - Walnut, IA
  • Average wind speed in January: 10.3mph

The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is July (7mph).

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Average humidity in January
Walnut, IA

Average humidity in January - Walnut, IA
  • Average humidity in January: 82%

The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is October (68%).

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Average rainfall in January
Walnut, IA

Average rainfall in January - Walnut, IA
  • Average rainfall in January: 0.87"

The wettest month (with the highest rainfall) is June (4.37").
The driest month (with the least rainfall) is January (0.87").

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Average rainfall days in January
Walnut, IA

Average rainfall days in January - Walnut, IA
  • Average rainfall days in January: 5.1 days

The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is February (3.6 days).

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Average snowfall in January
Walnut, IA

Average snowfall in January - Walnut, IA
  • Average snowfall in January: 3.62"

The month with the highest snowfall is February (3.7").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in January
Walnut, IA

Average snowfall days in January - Walnut, IA
  • Average snowfall days in January: 9.8 days

The month with the highest number of snowfall days is January (9.8 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
Walnut, IA

Average daylight in January / Average sunshine in January - Walnut, IA
  • Average daylight in January: 9h and 4min

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 12min).

  • Average sunshine in January: 4h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).

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Average sunshine days in January
Walnut, IA

Average sunshine days in January - Walnut, IA
  • Average sunshine days in January: 17.8 days

The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is June (11 days).

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Average UV index in January
Walnut, IA

Average UV index in January - Walnut, IA
  • Average UV index in January: 2

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

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Average cloud cover in January
Walnut, IA

Average cloud cover in January - Walnut, IA
  • Average cloud cover in January: 51

The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 27).

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Average visibility in January
Walnut, IA

Average visibility in January - Walnut, IA
  • Average visibility in January: 5mi

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

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Walnut, Iowa, USA

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