January weather forecast
Onawa, IA

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Weather in January

January, like December, is a freezing cold winter month in Onawa, Iowa, with an average temperature ranging between min 15.1°F (-9.4°C) and max 28°F (-2.2°C).

Temperature

January, with an average high of 28°F (-2.2°C) and a low of 15.1°F (-9.4°C), signifies the coldest month of the year.

Humidity

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

Rainfall

The month with the least rainfall in Onawa is January, when the rain falls for 2.9 days and typically collects 0.67" (17mm) of precipitation.

Snowfall

January through April, October through December are months with snowfall. In Onawa, in January, snow falls for 8.9 days, with typically accumulated 2.48" (63mm) of snow. Throughout the year, in Onawa, there are 32.9 snowfall days, and 11.69" (297mm) of snow is accumulated.

Daylight

In Onawa, Iowa, the average length of the day in January is 9h and 32min.
On the first day of the month, sunrise is at 7:52 am and sunset at 5:03 pm. On the last day of January, in Onawa, sunrise is at 7:38 am and sunset at 5:37 pm CST.

Sunshine

With an average of 4.4h of sunshine, January has the least sunshine of the year.

UV index

In January, the average daily maximum UV index in Onawa, Iowa, is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for the average person.
Note: In January, the maximum UV index of 2 transforms into these recommendations:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
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Frequently asked questions

What part of the year is the coldest in Onawa?

Onawa's coldest month, January, generally records average temperatures ranging from a high of 28°F (-2.2°C) to a low of 15.1°F (-9.4°C).

How cold is January in Onawa?

In January, in Onawa, the average high-temperature is 28°F (-2.2°C), and the average low-temperature is 15.1°F (-9.4°C).

What is the most humid month in Onawa?

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

What is the average humidity in January in Onawa?

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

What is the driest month in Onawa?

The month with the least rainfall in Onawa, Iowa, is January, when the rain falls for 2.9 days and typically collects 0.67" (17mm) of precipitation.

How much does it rain in Onawa in January?

In Onawa, Iowa, in January, it is raining for 2.9 days, with typically 0.67" (17mm) of accumulated precipitation.

How many days does it snow in January in Onawa?

In January, in Onawa, it is snowing for 8.9 days. Throughout January, 2.48" (63mm) of snow is accumulated.

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

In January, the average day length in Onawa, Iowa, is 9h and 32min.

When are sunrise and sunset in January in Onawa?

On the first day of January in Onawa, Iowa, sunrise is at 7:52 am and sunset at 5:03 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 5:37 pm CST.

What is the month with the least sunshine in Onawa?

The month with the least sunshine is January, with an average of 4.4h of sunshine.

How long on average sun shines in January in Onawa?

In January, the average sunshine duration in Onawa, Iowa, is 4.4h.

What is the UV index intensity in January in Onawa?

The average daily maximum UV index in January in Onawa, Iowa, is 2. A UV Index of 2, and less, symbolizes a minimal hazard to health from unprotected exposure to UV radiation.
Today
Tomorrow
Long-term
YearJanuaryFMAMJJASOND
Dec
January
Feb
Average high temperature
32.2°F 0.1°C
28°F -2.2°C
32.2°F 0.1°C
Average low temperature
20.3°F -6.5°C
15.1°F -9.4°C
18.3°F -7.6°C
Average pressure
30.13" 765mmHg
30.16" 766mmHg
30.15" 766mmHg
Average wind speed
10mph 16.1km/h
10.4mph 16.7km/h
10.5mph 16.9km/h
Average max. wind speed
10.9mph 17.5km/h
11.2mph 18km/h
11.2mph 18km/h
Average wind speed gusts
16mph 25.7km/h
16.6mph 26.7km/h
16.2mph 26.1km/h
Average humidity
79%
82%
79%
Average rainfall
1.42" 36mm
0.67" 17mm
0.83" 21mm
Average rainfall days
3.5
2.9
2.7
Average snowfall
2.13" 54mm
2.48" 63mm
3.03" 77mm
Average snowfall days
7
8.9
7.5
Average daylight
9h 1min
9h 3min
10h 4min
Average sunshine
4h 5min
4h 2min
5h 2min
Average sunshine days
20.7
19.4
17.3
Average UV index
1
2
1
Average cloud cover
48%
52%
48%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in January
Onawa, IA

Average temperature in January - Onawa, IA
  • Average high temperature in January: 28°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (28°F).

  • Average low temperature in January: 15.1°F

The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (15.1°F).

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Average pressure in January
Onawa, IA

Average pressure in January - Onawa, 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 (29.86"Hg).

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Average wind speed in January
Onawa, IA

Average wind speed in January - Onawa, IA
  • Average wind speed in January: 10.4mph

The windiest month (with the highest average wind speed) is April (10.9mph).
The calmest month (with the lowest average wind speed) is July (7.4mph).

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Average humidity in January
Onawa, IA

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

The month with the highest relative humidity is January (82%).
The months with the lowest relative humidity are April and October (66%).

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Average rainfall in January
Onawa, IA

Average rainfall in January - Onawa, IA
  • Average rainfall in January: 0.67"

The wettest month (with the highest rainfall) is May (3.31").
The driest month (with the least rainfall) is January (0.67").

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Average rainfall days in January
Onawa, IA

Average rainfall days in January - Onawa, IA
  • Average rainfall days in January: 2.9 days

The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is February (2.7 days).

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Average snowfall in January
Onawa, IA

Average snowfall in January - Onawa, IA
  • Average snowfall in January: 2.48"

The month with the highest snowfall is February (3.03").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in January
Onawa, IA

Average snowfall days in January - Onawa, IA
  • Average snowfall days in January: 8.9 days

The month with the highest number of snowfall days is January (8.9 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
Onawa, IA

Average daylight in January / Average sunshine in January - Onawa, 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 2min

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

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Average sunshine days in January
Onawa, IA

Average sunshine days in January - Onawa, IA
  • Average sunshine days in January: 19.4 days

The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is June (12 days).

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Average UV index in January
Onawa, IA

Average UV index in January - Onawa, 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 February and December (UV index 1).

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Average cloud cover in January
Onawa, IA

Average cloud cover in January - Onawa, IA
  • Average cloud cover in January: 52

The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 26).

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Average visibility in January
Onawa, IA

Average visibility in January - Onawa, IA
  • Average visibility in January: 6mi

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

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Onawa, Iowa, USA

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