January weather forecast
Portage, MI

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Weather in January

January in Portage, Michigan, greets residents and visitors with one of the coldest months, boasting a high average temperature of just 28.4°F (-2°C) and low temperatures dropping to an average of 18°F (-7.8°C). Snowfall is a common occurrence, as it is one of the months of highest snowfall, making it a picturesque winter wonderland. This month sees relatively less daytime with an average daylight timing around 9.5 hours per day. The relative humidity is high signifying that January is a notably damp month. With visibility usually of around 5 miles, winter travel requires caution and preparedness.

Temperature

In Portage, January is the coldest month, with temperatures averaging a high of 28.4°F (-2°C) and a low of 18°F (-7.8°C).

Humidity

With an average relative humidity of 87%, January is the most humid month in Portage.

Rainfall

In Portage, in January, it is raining for 6.6 days, with typically 1.93" (49mm) of accumulated precipitation. Throughout the year, in Portage, there are 158.4 rainfall days, and 29.88" (759mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Portage are January through May, October through December. In Portage, in January, during 16.6 snowfall days, 5.08" (129mm) of snow is typically accumulated. Throughout the year, there are 62.4 snowfall days, and 20.24" (514mm) of snow is accumulated.

Daylight

The average length of the day in January is 9h and 31min.
On the first day of the month, sunrise is at 8:10 am and sunset at 5:20 pm. On the last day of January, in Portage, sunrise is at 7:56 am and sunset at 5:54 pm EST.

Sunshine

January has the least sunshine of the year in Portage, with an average of 2.7h of sunshine.

UV index

January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: An average maximum UV index of 1 in January leads to these recommendations:
In contrast to children, who must always be shielded from the sun, most people can tolerate up to an hour of sun exposure without any burns. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
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Frequently asked questions

What is the coldest month in Portage?

Portage's coldest month, January, registers temperatures that range from a high of 28.4°F (-2°C) to a low of 18°F (-7.8°C).

How cold is it in Portage in January?

In Portage, 28.4°F (-2°C) is the average high-temperature and 18°F (-7.8°C) is the average low-temperature during January.

What is the most humid month in Portage?

The most humid month in Portage is January, with an average relative humidity of 87%.

What is the average humidity in January in Portage?

The average relative humidity in January in Portage, Michigan, is 87%.

How many days does it rain in January in Portage?

In January, the rain falls for 6.6 days. Throughout January, 1.93" (49mm) of precipitation is accumulated.

How many days does it snow in January in Portage?

In Portage, Michigan, during January, snow falls for 16.6 days and regularly aggregates up to 5.08" (129mm) of snow.

How many hours of daylight does Portage have in January?

The average day length in January in Portage, Michigan, is 9h and 31min.

When is the sunrise / sunset in January in Portage?

In January, on the first day of the month, sunrise is at 8:10 am and sunset at 5:20 pm. On the last day of the month, in Portage, Michigan, sunrise is at 7:56 am and sunset at 5:54 pm EST.

What is the month with the least sunshine in Portage?

January has the least sunshine of the year, with an average of 2.7h of sunshine.

How many hours of sunshine does Portage have in January?

In January, the average sunshine duration in Portage is 2.7h.

When is the lowest UV index in Portage?

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

What is the UV index intensity in January in Portage?

In January, the average daily maximum UV index is 1. A UV Index of 2, and less, symbolizes a low health risk from exposure to Sun's UV rays.
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
Portage, MI

Average temperature in January - Portage, MI
  • Average high temperature in January: 28.4°F

The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (28.4°F).

  • Average low temperature in January: 18°F

The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (18°F).

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Average pressure in January
Portage, MI

Average pressure in January - Portage, MI
  • Average pressure in January: 30.09"Hg

The months with the highest atmospheric pressure are January, March and November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in January
Portage, MI

Average wind speed in January - Portage, MI
  • Average wind speed in January: 10.1mph

The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is July (6.3mph).

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Average humidity in January
Portage, MI

Average humidity in January - Portage, MI
  • Average humidity in January: 87%

The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are April and October (77%).

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Average rainfall in January
Portage, MI

Average rainfall in January - Portage, MI
  • Average rainfall in January: 1.93"

The wettest month (with the highest rainfall) is May (3.62").
The driest month (with the least rainfall) is November (1.73").

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Average rainfall days in January
Portage, MI

Average rainfall days in January - Portage, MI
  • Average rainfall days in January: 6.6 days

The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is February (5.2 days).

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Average snowfall in January
Portage, MI

Average snowfall in January - Portage, MI
  • Average snowfall in January: 5.08"

The month with the highest snowfall is February (5.12").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in January
Portage, MI

Average snowfall days in January - Portage, MI
  • Average snowfall days in January: 16.6 days

The month with the highest number of snowfall days is January (16.6 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
Portage, MI

Average daylight in January / Average sunshine in January - Portage, MI
  • 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: 2h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 2h and 42min).

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Average sunshine days in January
Portage, MI

Average sunshine days in January - Portage, MI
  • Average sunshine days in January: 10.3 days

The month with the most sunshine days is November (13.5 days).
The month with the least sunshine days is February (9.8 days).

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Average UV index in January
Portage, MI

Average UV index in January - Portage, MI
  • Average UV index in January: 1

The months with the highest UV index are June and August (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
Portage, MI

Average cloud cover in January - Portage, MI
  • Average cloud cover in January: 73

The month with the most cloud cover is January (Cloud cover 73).
The month with the least cloud cover is July (Cloud cover 31).

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Average visibility in January
Portage, MI

Average visibility in January - Portage, MI
  • Average visibility in January: 5mi

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

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Portage, Michigan, USA

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