January weather forecastGrand Portage, MN

January

Weather in January

The chill of winter is truly felt in Grand Portage during January. Outdoor enthusiasts start their year with engaging winter activities, exposing themselves to temperatures plummeting to as low as 3.7°F (-15.7°C). Weather conditions include high levels of relative humidity contributing to the overall frosty ambiance. Snowfall replaces rainfall creating a picturesque winter wonderland. The days are short, but the beauty of the winter landscape prevails.

Temperature

The coldest time of the year is January, with temperatures averaging a high of 16.2°F (-8.8°C) and a low of 3.7°F (-15.7°C).

Humidity

The months with the highest humidity in Grand Portage are January and February, with an average relative humidity of 90%.

Rainfall

The months with the least rainfall in Grand Portage are January and February Rain falls for 4.5 days and accumulates 1.06" (27mm) of rain.

Snowfall

January through May, October through December are months with snowfall. January is the month with the most snowfall. Snow falls for 21.6 days and accumulates 7.76" (197mm) of snow.

Ocean temperature

January through April, with an average ocean temperature of 35.6°F (2°C), are months with the coldest seawater.
Note: In terms of swimming, this condition is dangerously life-threatening. Water temperatures cause sharp pain and provoke immediate hyperventilation. A specialized swimsuit is compulsory to alleviate thermal damage.

Daylight

The average length of the day in January is 8h and 55min.
On the first day of the month, sunrise is at 7:48 am and sunset at 4:16 pm. On the last day of January, in Grand Portage, sunrise is at 7:27 am and sunset at 4:56 pm CST.

Sunshine

January has the least sunshine of the year, with an average of 3h of sunshine.

UV index

January through March, November 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 unprotected exposure to Sun's UV rays for ordinary individuals.
Note: During January, 1 as the daily maximum UV index converts into the following advice:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.

Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

The coldest period tends to be January, when average temperatures fluctuate between a high of 16.2°F (-8.8°C) and a low of 3.7°F (-15.7°C).

The high-temperature during January is 16.2°F (-8.8°C) and the low-temperature is 3.7°F (-15.7°C).

January and February, with an average relative humidity of 90%, are most humid months in Grand Portage.

In January, the average relative humidity in Grand Portage, Minnesota, is 90%.

The months with the least rainfall in Grand Portage, Minnesota, are January and February Rain falls for 4.5 days and accumulates 1.06" (27mm) of rain.

In Grand Portage, in January, it is raining for 4.5 days, with typically 1.06" (27mm) of accumulated precipitation.

The month with the most snowfall is January, when snow falls for 21.6 days and typically aggregates up to 7.76" (197mm) of snow.

In Grand Portage, in January, snow falls for 21.6 days, with typically accumulated 7.76" (197mm) of snow.

The months with the coldest seawater in Grand Portage, Minnesota, are January through April, with an average ocean temperature of 35.6°F (2°C).

In Grand Portage, in January, the average water temperature is 35.6°F (2°C). For swimming, this is considered extremely cold, dangerous, and life-threatening. Unless suitably protected with insulated waterproof clothing, hypothermia quickly occurs.

In January, the average day length in Grand Portage is 8h and 55min.

On the first day of January in Grand Portage, sunrise is at 7:48 am and sunset at 4:16 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 4:56 pm CST.

With an average of 3h of sunshine, January has the least sunshine of the year in Grand Portage.

In January, the average sunshine duration is 3h.

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

In Grand Portage, Minnesota, the average daily maximum UV index in January is 1. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to UV radiation.

Today

Tomorrow

Long-term

Year January F M A M J J A S O N D

Dec

January

Feb

Average high temperature

21.6°F

16.2°F

18°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

9.8mph

9.6mph

9.3mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

19.6

21.6

19.6

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

10.5

10.9

10.8

Average UV index

Average cloud cover

Average visibility

Average temperature in January
Grand Portage, MN

Average high temperature in January: 16.2°F

The warmest months (with the highest average high temperature) are July and August (70°F).
The month with the lowest average high temperature is January (16.2°F).

Average low temperature in January: 3.7°F

The month with the highest average low temperature is August (54.3°F).
The coldest month (with the lowest average low temperature) is January (3.7°F).

Average pressure in January
Grand Portage, MN

Average pressure in January: 30.04"Hg

The month with the highest atmospheric pressure is March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

Average wind speed in January
Grand Portage, MN

Average wind speed in January: 9.1mph

The windiest month (with the highest average wind speed) is December (9.2mph).
The calmest month (with the lowest average wind speed) is June (6.2mph).

Average humidity in January
Grand Portage, MN

Average humidity in January: 90%

The months with the highest relative humidity are January and February (90%).
The month with the lowest relative humidity is May (70%).

Average rainfall in January
Grand Portage, MN

Average rainfall in January: 1.06"

The wettest months (with the highest rainfall) are May and October (1.77").
The driest months (with the least rainfall) are January and February (1.06").

Average rainfall days in January
Grand Portage, MN

Average rainfall days in January: 4.5 days

The month with the highest number of rainy days is July (12.9 days).
The month with the least rainy days is February (4.2 days).

Average snowfall in January
Grand Portage, MN

Average snowfall in January: 7.76"

The month with the highest snowfall is January (7.76").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in January
Grand Portage, MN

Average snowfall days in January: 21.6 days

The month with the highest number of snowfall days is January (21.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average sea temperature in January
Grand Portage, MN

Average sea temperature in January: 36°F

The best month for swimming (with the highest average sea temperature) is August (59°F).
The coldest months (with the lowest average sea temperature) are January, February, March and April (36°F).

Average daylight in January /
Average sunshine in January
Grand Portage, MN

Average daylight in January: 8h and 54min

The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 30min).

Average sunshine in January: 3h and 0min

The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).

Average sunshine days in January
Grand Portage, MN

Average sunshine days in January: 10.9 days

The month with the most sunshine days is September (18.1 days).
The month with the least sunshine days is March (9.8 days).

Average UV index in January
Grand Portage, MN

Average UV index in January: 1

The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 1).

Average cloud cover in January
Grand Portage, MN

Average cloud cover in January: 70

The month with the most cloud cover is January (Cloud cover 70).
The month with the least cloud cover is July (Cloud cover 33).

Average visibility in January
Grand Portage, MN

Average visibility in January: 5mi

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