January weather forecast
Oconomowoc, WI

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Weather in January

January, like December, is another subzero cold winter month in Oconomowoc, Wisconsin, with temperature in the range of an average high of 24.3°F (-4.3°C) and an average low of 12.2°F (-11°C).

Temperature

In Oconomowoc, the lowest average temperatures are observed in January, with a high of 24.3°F (-4.3°C) and a low of 12.2°F (-11°C).

Humidity

January is the most humid month, with an average relative humidity of 88%.

Rainfall

In Oconomowoc, Wisconsin, during January, the rain falls for 2.8 days and regularly aggregates up to 0.67" (17mm) of precipitation. In Oconomowoc, Wisconsin, during the entire year, the rain falls for 117.9 days and collects up to 13.82" (351mm) of precipitation.

Snowfall

January through April, October through December are months with snowfall in Oconomowoc. January is the month with the most snowfall in Oconomowoc. Snow falls for 12.8 days and accumulates 2.17" (55mm) of snow.

Daylight

The average length of the day in January in Oconomowoc, Wisconsin, is 9h and 26min.
On the first day of the month, sunrise is at 7:25 am and sunset at 4:29 pm. On the last day of January, in Oconomowoc, Wisconsin, sunrise is at 7:10 am and sunset at 5:04 pm CST.

Sunshine

The month with the least sunshine is January, with an average of 3.3h of sunshine.

UV index

The months with the lowest UV index in Oconomowoc, Wisconsin, are January, November and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for the average person.
Note: The daily maximum UV index of 1 in January interprets into the following advice:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the coldest months in Oconomowoc?

Oconomowoc's coldest temperatures are experienced in January, with average high temperatures of 24.3°F (-4.3°C) and lows of 12.2°F (-11°C).

How cold is it in Oconomowoc in January?

During January, Oconomowoc experiences an average high-temperature of 24.3°F (-4.3°C) and a low-temperature of 12.2°F (-11°C).

What is the most humid month in Oconomowoc?

The most humid month in Oconomowoc is January, with an average relative humidity of 88%.

What is the average humidity in January in Oconomowoc?

In Oconomowoc, the average relative humidity in January is 88%.

How many days does it rain in January in Oconomowoc?

In Oconomowoc, during January, the rain falls for 2.8 days and regularly aggregates up to 0.67" (17mm) of precipitation.

When does it snow the most in Oconomowoc?

January is the month with the most snowfall in Oconomowoc. Snow falls for 12.8 days and accumulates 2.17" (55mm) of snow.

How many days does it snow in January in Oconomowoc?

In January, in Oconomowoc, Wisconsin, it is snowing for 12.8 days. Throughout January, 2.17" (55mm) of snow is accumulated.

How many hours of daylight does Oconomowoc have in January?

In Oconomowoc, Wisconsin, the average day length in January is 9h and 26min.

When are sunrise and sunset in January in Oconomowoc?

On the first day of January in Oconomowoc, sunrise is at 7:25 am and sunset at 4:29 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 5:04 pm CST.

What is the month with the least sunshine in Oconomowoc?

January has the least sunshine of the year in Oconomowoc, Wisconsin, with an average of 3.3h of sunshine.

How long on average sun shines in January in Oconomowoc?

The average sunshine duration in January in Oconomowoc, Wisconsin, is 3.3h.

When is the lowest UV index in Oconomowoc?

January, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Oconomowoc.

How high is the UV index in January in Oconomowoc?

In Oconomowoc, the average daily maximum UV index in January is 1. A UV Index reading of 2, and below, represents a low health threat from exposure to the Sun's UV radiation.
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 January
Oconomowoc, WI

Average temperature in January - Oconomowoc, WI
  • Average high temperature in January: 24.3°F

The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (24.3°F).

  • Average low temperature in January: 12.2°F

The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is January (12.2°F).

Average pressure in January
Oconomowoc, WI

Average pressure in January - Oconomowoc, WI
  • Average pressure in January: 30.1"Hg

The months with the highest atmospheric pressure are January and February (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in January
Oconomowoc, WI

Average wind speed in January - Oconomowoc, WI
  • Average wind speed in January: 9.9mph

The windiest month (with the highest average wind speed) is April (10mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).

Average humidity in January
Oconomowoc, WI

Average humidity in January - Oconomowoc, WI
  • Average humidity in January: 88%

The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is April (76%).

Average rainfall in January
Oconomowoc, WI

Average rainfall in January - Oconomowoc, WI
  • Average rainfall in January: 0.67"

The wettest month (with the highest rainfall) is July (1.85").
The driest months (with the least rainfall) are February and December (0.59").

Average rainfall days in January
Oconomowoc, WI

Average rainfall days in January - Oconomowoc, WI
  • Average rainfall days in January: 2.8 days

The month with the highest number of rainy days is July (14.7 days).
The month with the least rainy days is January (2.8 days).

Average snowfall in January
Oconomowoc, WI

Average snowfall in January - Oconomowoc, WI
  • Average snowfall in January: 2.17"

The month with the highest snowfall is January (2.17").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in January
Oconomowoc, WI

Average snowfall days in January - Oconomowoc, WI
  • Average snowfall days in January: 12.8 days

The month with the highest number of snowfall days is January (12.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in January /
Average sunshine in January
Oconomowoc, WI

Average daylight in January / Average sunshine in January - Oconomowoc, WI
  • Average daylight in January: 9h and 2min

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

  • Average sunshine in January: 3h and 2min

The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 18min).

Average sunshine days in January
Oconomowoc, WI

Average sunshine days in January - Oconomowoc, WI
  • Average sunshine days in January: 16.7 days

The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is July (11.7 days).

Average UV index in January
Oconomowoc, WI

Average UV index in January - Oconomowoc, WI
  • Average UV index in January: 1

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

Average cloud cover in January
Oconomowoc, WI

Average cloud cover in January - Oconomowoc, WI
  • Average cloud cover in January: 65

The month with the most cloud cover is January (Cloud cover 65).
The months with the least cloud cover are July, August and September (Cloud cover 34).

Average visibility in January
Oconomowoc, WI

Average visibility in January - Oconomowoc, WI
  • Average visibility in January: 5mi

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

Oconomowoc, Wisconsin, USA

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