January weather forecast
Newton, IA

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Weather in January

In Newton, Iowa, the beginning of the year greets residents with winter's chill. As the coldest month of the year, temperatures can drop as low as 14.4°F (-9.8°C), making it important to wrap up warm. The consistently low temperatures combined with short daylight hours of 9.6 hours promote a heavy reliance on indoor heating. January is also distinct for its snowfall, which is a common sight in Newton, bringing a beautiful winter landscape but also potential driving hazards. The weather severity is accompanied by a reduced UV index, easing concerns over sun-related skin damage.

Temperature

January stands out as Newton's coldest month, with an average high-temperature of 27.1°F (-2.7°C) and a low-temperature of 14.4°F (-9.8°C).

Humidity

The most humid month in Newton is January, with an average relative humidity of 84%.

Rainfall

January, February and December are months with the least rain in Newton when the rain falls for 3.8 days and typically aggregates up to 0.39" (10mm) of rain.

Snowfall

January through May, October through December are months with snowfall in Newton. January is the month with the most snowfall in Newton. Snow falls for 8.4 days and accumulates 1.73" (44mm) of snow.

Daylight

The average length of the day in January is 9h and 34min.
On the first day of January in Newton, Iowa, sunrise is at 7:39 am and sunset at 4:52 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 5:25 pm CST.

Sunshine

January has the least sunshine of the year, with an average of 4.2h of sunshine.

UV index

The months with the lowest UV index in Newton are January and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: The UV index of 1 during January translates into the following guidance:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
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Frequently asked questions

What is the coldest month in Newton?

The coldest period is January, when temperatures fluctuate between an average high of 27.1°F (-2.7°C) and a low of 14.4°F (-9.8°C).

How cold is it in Newton in January?

Newton in January has an average high-temperature of 27.1°F (-2.7°C) and an average low-temperature of 14.4°F (-9.8°C).

What is the most humid month in Newton?

January is the most humid month in Newton, Iowa, with an average relative humidity of 84%.

What is the average humidity in January in Newton?

In Newton, the average relative humidity in January is 84%.

What is the driest month in Newton?

The months with the least rainfall in Newton are January, February and December Rain falls for 3.8 days and accumulates 0.39" (10mm) of rain.

How much does it rain in Newton in January?

In Newton, Iowa, in January, it is raining for 3.8 days, with typically 0.39" (10mm) of accumulated precipitation.

What is the snowiest month in Newton?

The month with the most snowfall in Newton, Iowa, is January, when snow falls for 8.4 days and typically aggregates up to 1.73" (44mm) of snow.

How much does it snow in Newton in January?

In Newton, Iowa, in January, during 8.4 snowfall days, 1.73" (44mm) of snow is typically accumulated.

How many hours of daylight does Newton have in January?

In Newton, the average day length in January is 9h and 34min.

What time are sunrise and sunset in January in Newton?

On the first day of January, sunrise is at 7:39 am and sunset at 4:52 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 5:25 pm CST.

What is the month with the least sunshine in Newton?

The month with the least sunshine is January, with an average of 4.2h of sunshine.

How many hours of sunshine does Newton have in January?

In January, the average sunshine duration in Newton, Iowa, is 4.2h.

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

The months with the lowest UV index in Newton, Iowa, are January and December, with an average maximum UV index of 1.

What is the UV index intensity in January in Newton?

The average daily maximum UV index in January in Newton, Iowa, is 1. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJanuaryFMAMJJASOND
Dec
January
Feb
Average high temperature
33.8°F 1°C
27.1°F -2.7°C
31.5°F -0.3°C
Average low temperature
22.1°F -5.5°C
14.4°F -9.8°C
17.4°F -8.1°C
Average pressure
30.11" 765mmHg
30.15" 766mmHg
30.14" 766mmHg
Average wind speed
10mph 16.1km/h
10.5mph 16.9km/h
10.4mph 16.7km/h
Average max. wind speed
10.7mph 17.2km/h
11.2mph 18km/h
11.1mph 17.9km/h
Average wind speed gusts
15.7mph 25.3km/h
16.7mph 26.9km/h
16.4mph 26.4km/h
Average humidity
80%
84%
83%
Average rainfall
0.39" 10mm
0.39" 10mm
0.39" 10mm
Average rainfall days
4.3
3.8
3.4
Average snowfall
0.51" 13mm
1.73" 44mm
1.54" 39mm
Average snowfall days
5
8.4
7.3
Average daylight
9h 1min
9h 4min
10h 4min
Average sunshine
4h 4min
4h 1min
4h 3min
Average sunshine days
22.9
21.8
19.1
Average UV index
1
1
2
Average cloud cover
51%
55%
52%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in January
Newton, IA

Average temperature in January - Newton, IA
  • Average high temperature in January: 27.1°F

The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (27.1°F).

  • Average low temperature in January: 14.4°F

The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (14.4°F).

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Average pressure in January
Newton, IA

Average pressure in January - Newton, IA
  • Average pressure in January: 30.15"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

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Average wind speed in January
Newton, IA

Average wind speed in January - Newton, IA
  • Average wind speed in January: 10.5mph

The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).

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Average humidity in January
Newton, IA

Average humidity in January - Newton, IA
  • Average humidity in January: 84%

The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in January
Newton, IA

Average rainfall in January - Newton, IA
  • Average rainfall in January: 0.39"

The wettest month (with the highest rainfall) is May (2.13").
The driest months (with the least rainfall) are January, February and December (0.39").

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Average rainfall days in January
Newton, IA

Average rainfall days in January - Newton, IA
  • Average rainfall days in January: 3.8 days

The month with the highest number of rainy days is May (14.7 days).
The month with the least rainy days is February (3.4 days).

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Average snowfall in January
Newton, IA

Average snowfall in January - Newton, IA
  • Average snowfall in January: 1.73"

The month with the highest snowfall is January (1.73").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in January
Newton, IA

Average snowfall days in January - Newton, IA
  • Average snowfall days in January: 8.4 days

The month with the highest number of snowfall days is January (8.4 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
Newton, IA

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

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 1min

The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).

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Average sunshine days in January
Newton, IA

Average sunshine days in January - Newton, IA
  • Average sunshine days in January: 21.8 days

The month with the most sunshine days is December (22.9 days).
The month with the least sunshine days is June (12.2 days).

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Average UV index in January
Newton, IA

Average UV index in January - Newton, IA
  • Average UV index in January: 1

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).

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Average cloud cover in January
Newton, IA

Average cloud cover in January - Newton, IA
  • Average cloud cover in January: 55

The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are July and September (Cloud cover 30).

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Average visibility in January
Newton, IA

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

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

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Newton, Iowa, USA

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