Duluth
Minnesota, USA
Long-term weather forecast
Long-term weather forecast

April weather forecast and climate
Duluth, MN

A dusk view of bright neon lights in Duluth, Minnesota, and a clear view of the lit Aerial Lift Bridge, and two long piers with lighthouses at the ends
A dusk view of bright neon lights in Duluth, Minnesota, and a clear view of the lit Aerial Lift Bridge, and two long piers with lighthouses at the ends
April is a frosty spring month in Duluth, Minnesota, with average temperature varying between 49.3°F (9.6°C) and 30°F (-1.1°C).

Temperature

In April, the average high-temperature significantly increases, from a cold 34.3°F (1.3°C) in March, to a chilly 49.3°F (9.6°C). In Duluth, the average low-temperature is 30°F (-1.1°C).

Humidity

The average relative humidity in April is 63.6%.

Rainfall

In Duluth, it is raining for 10.6 days, with typically 2.4" (61.7mm) of accumulated precipitation. In Duluth, during the entire year, the rain falls for 131.4 days and collects up to 31" (786.3mm) of precipitation.

Snowfall

Months with snowfall are January through May, September through December.

Ocean temperature

January through April, with an average ocean temperature of 35.6°F (2°C), are months with the coldest seawater. For swimming, this is considered very dangerous and immediately life-threatening. Total loss of breathing control instantly occurs, and clear thinking becomes almost impossible. A specialized swimsuit is obligatory to minimize thermal loss.

Daylight

The average length of the day in April is 13.6h.

Sunshine

The average sunshine in Duluth is 7.7h.

UV index

In Duluth, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from the exposure to the Sun's UV radiation for average individuals.
The daily maximum UV index of 5 in April interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the temperature in April in Duluth?

In Duluth, Minnesota, in April, the average high-temperature is 49.3°F (9.6°C), and the average low-temperature is 30°F (-1.1°C).

What is the average humidity in April in Duluth?

In April, the average relative humidity is 63.6%.

How much does it rain in Duluth in April?

In Duluth, Minnesota, during April, the rain falls for 10.6 days and regularly aggregates up to 2.4" (61.7mm) of precipitation.

How much does it snow in Duluth in April?

In Duluth, in April, during 4.6 snowfall days, 6.9" (175.3mm) of snow is typically accumulated.

When is the ocean coldest in Duluth?

January through April, with an average ocean temperature of 35.6°F (2°C), are months with the coldest seawater. For swimming, this is considered extremely cold, dangerous, and life-threatening. Unless suitably protected with insulated waterproof clothing, hypothermia quickly occurs.

What is the ocean temperature in April in Duluth?

In Duluth, the average seawater temperature in April 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 Duluth have in April?

In April, the average length of the day is 13.6h.

How many hours of sunshine does Duluth have in April?

In April, the average sunshine in Duluth is 7.7h.

How high is the UV index in April in Duluth?

The average daily maximum UV index in April in Duluth is 5. A UV Index estimate of 3 to 5 represents a moderate vulnerability from the exposure to the Sun's UV rays.
Average temperature in April - Duluth, MN
  • Average high temperature in April: 49.2°F

The warmest month (with the highest average high temperature) is July (76.3°F).
The month with the lowest average high temperature is January (18.9°F).

  • Average low temperature in April: 30°F

The month with the highest average low temperature is July (55.4°F).
The coldest month (with the lowest average low temperature) is January (1.5°F).

Average humidity in April - Duluth, MN
  • Average humidity in April: 63.6%

The month with the highest relative humidity is December (76.3%).
The month with the lowest relative humidity is May (62.7%).

Average rainfall in April - Duluth, MN
  • Average rainfall in April: 2.4"

The wettest month (with the highest rainfall) is June (4.2").
The driest month (with the lowest rainfall) is February (0.8").

Average rainfall days in April - Duluth, MN
  • Average rainfall days in April: 10.6 days

The month with the highest number of rainy days is June (12.6 days).
The month with the lowest number of rainy days is February (8.5 days).

Average snowfall in April - Duluth, MN
  • Average snowfall in April: 6.9"

The month with the highest snowfall is January (19.4").
Months with the lowest snowfall are June, July and August (0").

Average snowfall days in April - Duluth, MN
  • Average snowfall days in April: 4.6 days

The month with the highest number of snowfall days is January (12.9 days).
Months with the lowest number of snowfall days are June, July and August (0 days).

Average sea temperature in April - Duluth, MN
  • Average sea temperature in April: 36°F

The best month for swimming (with the highest average sea temperature) is August (61°F).
Coldest months (with the lowest average sea temperature) are January, February, March and April (36°F).

Average daylight in April / Average sunshine in April - Duluth, MN
  • Average daylight in April: 13.6h

The month with the longest days is June (Average daylight: 15.8h).
The month with shortest days is December (Average daylight: 8.6h).

  • Average sunshine in April: 7.7h

The month with most sunshine is July (Average sunshine: 9.9h).
Months with least sunshine are November and December (Average sunshine: 3.3).

Average UV index in April - Duluth, MN
  • Average UV index in April: 5

Months with the highest UV index are June and July (UV index 8).
Months with the lowest UV index are January, November and December (UV index 1).