March weather forecast
Grand Portage, MN

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Weather in March

Grand Portage welcomes March with mixed signals, still under winter’s grasp yet hinting towards spring. The measurable snowfall reduces to 5.2" (132mm), marking a significant transition as the season progresses. Cloud coverage decreases, promising brighter days ahead. The sustained wind speed remains relatively calm, producing a tranquil ambiance. Longer daylight hours in March set the stage for the awaited transition to spring.

Temperature

The start of March is characterized by an increase in the average high-temperature, transitioning from a subzero cold 18°F (-7.8°C) in February to a still freezing cold 29.7°F (-1.3°C). Nighttime temperatures in March average to a still subzero cold 18°F (-7.8°C).

Humidity

In Grand Portage, the average relative humidity in March is 87%.

Rainfall

In Grand Portage, in March, it is raining for 10.6 days, with typically 1.34" (34mm) of accumulated precipitation. Throughout the year, in Grand Portage, there are 115 rainfall days, and 18.19" (462mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall. In Grand Portage, in March, snow falls for 17.2 days, with typically accumulated 5.2" (132mm) of snow. Throughout the year, in Grand Portage, Minnesota, there are 104.1 snowfall days, and 39.84" (1012mm) of snow is accumulated.

Ocean temperature

January through April, with an average ocean temperature of 35.6°F (2°C), are months with the coldest seawater in Grand Portage.
Note: In swimming engagements, this poses immediate life-threatening risks. The loss of breath control is instantaneous, thereby hindering clear thought. A specialized swimsuit is mandatory to limit thermal dissipation.

Daylight

In Grand Portage, Minnesota, the average length of the day in March is 11h and 56min.
On the first day of March in Grand Portage, sunrise is at 6:37 am and sunset at 5:43 pm CST. On the last day of the month, sunrise is at 6:37 am and sunset at 7:28 pm CDT.
Note: On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time lasts until Sunday, November 3. 2024, at 2:00 am; consequently, the time zone reverts from CDT to CST.

Sunshine

In March, the average sunshine is 4.5h.

UV index

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: The maximum UV index, 1 during March, leads to the following recommendations:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in Grand Portage in March?

March temperatures in Grand Portage vary between a high-temperature of 29.7°F (-1.3°C) and a low-temperature of 18°F (-7.8°C).

What is the average humidity in March in Grand Portage?

In Grand Portage, the average relative humidity in March is 87%.

How much does it rain in Grand Portage in March?

In March, in Grand Portage, the rain falls for 10.6 days. Throughout March, 1.34" (34mm) of precipitation is accumulated.

How much does it snow in Grand Portage in March?

In Grand Portage, Minnesota, in March, snow falls for 17.2 days, with typically accumulated 5.2" (132mm) of snow.

What months are the ocean coldest in Grand Portage?

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

What is the ocean temperature in March in Grand Portage?

In Grand Portage, in March, 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.

How many hours of daylight does Grand Portage have in March?

In March, the average day length in Grand Portage is 11h and 56min.

What time are sunrise and sunset in March in Grand Portage?

On the first day of March, sunrise is at 6:37 am and sunset at 5:43 pm CST. On the last day of the month, sunrise is at 6:37 am and sunset at 7:28 pm CDT.

When does Daylight Saving Time (DST) start in March in Grand Portage?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Grand Portage, Minnesota, and the time zone changes from CST to CDT. DST ends Sunday, November 3. 2024, at 2:00 am.

How long on average sun shines in March in Grand Portage?

In Grand Portage, the average sunshine duration in March is 4.5h.

What are the months with the lowest UV index in Grand Portage?

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

How high is the UV index in March in Grand Portage?

In Grand Portage, Minnesota, the average daily maximum UV index in March is 1. A UV Index value of 2, and less, symbolizes a low health threat 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 March
Grand Portage, MN

Average temperature in March - Grand Portage, MN
  • Average high temperature in March: 29.7°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 March: 18°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 March
Grand Portage, MN

Average pressure in March - Grand Portage, MN
  • Average pressure in March: 30.09"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 March
Grand Portage, MN

Average wind speed in March - Grand Portage, MN
  • Average wind speed in March: 7.9mph

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 March
Grand Portage, MN

Average humidity in March - Grand Portage, MN
  • Average humidity in March: 87%

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 March
Grand Portage, MN

Average rainfall in March - Grand Portage, MN
  • Average rainfall in March: 1.34"

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 March
Grand Portage, MN

Average rainfall days in March - Grand Portage, MN
  • Average rainfall days in March: 10.6 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 March
Grand Portage, MN

Average snowfall in March - Grand Portage, MN
  • Average snowfall in March: 5.2"

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 March
Grand Portage, MN

Average snowfall days in March - Grand Portage, MN
  • Average snowfall days in March: 17.2 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 March
Grand Portage, MN

Average sea temperature in March - Grand Portage, MN
  • Average sea temperature in March: 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 March /
Average sunshine in March
Grand Portage, MN

Average daylight in March / Average sunshine in March - Grand Portage, MN
  • Average daylight in March: 11h and 5min

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 March: 4h and 3min

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 March
Grand Portage, MN

Average sunshine days in March - Grand Portage, MN
  • Average sunshine days in March: 9.8 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 March
Grand Portage, MN

Average UV index in March - Grand Portage, MN
  • Average UV index in March: 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 March
Grand Portage, MN

Average cloud cover in March - Grand Portage, MN
  • Average cloud cover in March: 65

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 March
Grand Portage, MN

Average visibility in March - Grand Portage, MN
  • Average visibility in March: 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).

Grand Portage, Minnesota, USA

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