March weather forecast
Unalaska, AK

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Weather in March

Weather in Unalaska during March sees the onset of spring with clear indicators like reduced snowfall, a substantial increase in daylight hours, and a slight elevation of average temperatures. The sea temperature remains pretty much steady, not contributing much to any major weather change. March also sees a decrease in wind speed contributing to a calmer atmosphere. The reduction in cloud cover fractionally boosts visibility. Even though the snowfall lessens, the winter chill doesn't relinquish its grip completely.

Temperature

March brings the lowest temperatures, with an average high of 34.7°F (1.5°C) and an average low of 30.7°F (-0.7°C).

Humidity

The average relative humidity in March in Unalaska is 81%.

Rainfall

In March, in Unalaska, the rain falls for 12.1 days. Throughout March, 2.28" (58mm) of precipitation is accumulated. In Unalaska, during the entire year, the rain falls for 198.8 days and collects up to 33.78" (858mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. In Unalaska, during March, snow falls for 13.2 days and regularly aggregates up to 4.17" (106mm) of snow. In Unalaska, during the entire year, snow falls for 78.3 days and aggregates up to 30.39" (772mm) of snow.

Ocean temperature

February and March, with an average ocean temperature of 38.8°F (3.8°C), are months with the coldest seawater.
Note: For swimming, this is considered life-threatening and very dangerous. The water feels painfully cold, and hyperventilation quickly occurs. A specialized swimsuit is mandatory to reduce thermal damage.

Daylight

The average length of the day in March is 11h and 56min.
On the first day of March in Unalaska, Alaska, sunrise is at 8:51 am and sunset at 7:44 pm AKST. On the last day of the month, sunrise is at 8:38 am and sunset at 9:41 pm AKDT.
Note: On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from AKST to AKDT. Daylight Saving Time lasts until Sunday, November 3. 2024, at 2:00 am; consequently, the time zone reverts from AKDT to AKST.

Sunshine

The average sunshine in March is 3.9h.

UV index

February through April and November, with an average maximum UV index of 1, are months with the lowest UV index in Unalaska. A UV Index estimate of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: An average maximum UV index of 1 in March leads to these recommendations:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
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Frequently asked questions

What are the coldest months in Unalaska?

Unalaska notes the coldest temperatures in March, with a average high of 34.7°F (1.5°C) and a low of 30.7°F (-0.7°C).

How cold is March in Unalaska?

In March, in Unalaska, the average high-temperature is 34.7°F (1.5°C), and the average low-temperature is 30.7°F (-0.7°C).

What is the average humidity in March in Unalaska?

In March, the average relative humidity in Unalaska is 81%.

How many days does it rain in March in Unalaska?

In Unalaska, Alaska, in March, it is raining for 12.1 days, with typically 2.28" (58mm) of accumulated precipitation.

How many days does it snow in March in Unalaska?

In Unalaska, Alaska, in March, snow falls for 13.2 days, with typically accumulated 4.17" (106mm) of snow.

What months are the ocean coldest in Unalaska?

The months with the coldest seawater in Unalaska, Alaska, are February and March, with an average ocean temperature of 38.8°F (3.8°C).

What is the ocean temperature in March in Unalaska?

In March, the average ocean temperature in Unalaska, Alaska, is 38.8°F (3.8°C). For swimming, this is considered life-threatening and very dangerous. The water feels painfully cold, and hyperventilation quickly occurs. A specialized swimsuit is mandatory to reduce thermal damage.

How many hours of daylight does Unalaska have in March?

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

When is the sunrise / sunset in March in Unalaska?

In March, on the first day of the month, sunrise is at 8:51 am and sunset at 7:44 pm AKST. On the last day of the month, sunrise is at 8:38 am and sunset at 9:41 pm AKDT.

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

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Unalaska, and the time zone changes from AKST to AKDT. DST ends Sunday, November 3. 2024, at 2:00 am.

How many hours of sunshine does Unalaska have in March?

In March, the average sunshine duration is 3.9h.

What is the month with the lowest UV index in Unalaska?

The months with the lowest UV index in Unalaska are February through April and November, with an average maximum UV index of 1.

What is the UV index reading in March in Unalaska?

The average daily maximum UV index in March in Unalaska is 1. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation.
Today
Tomorrow
Long-term
YearJFMarchAMJJASOND
Feb
March
Apr
Average high temperature
36°F 2.2°C
34.7°F 1.5°C
37.4°F 3°C
Average low temperature
32°F 0°C
30.7°F -0.7°C
33.4°F 0.8°C
Average pressure
29.66" 753mmHg
29.77" 756mmHg
29.72" 755mmHg
Average wind speed
15.8mph 25.4km/h
14.7mph 23.7km/h
14.4mph 23.2km/h
Average max. wind speed
17.2mph 27.7km/h
15.6mph 25.1km/h
15.1mph 24.3km/h
Average wind speed gusts
22.6mph 36.4km/h
20.6mph 33.2km/h
20.6mph 33.2km/h
Average humidity
83%
81%
84%
Average rainfall
3.03" 77mm
2.28" 58mm
2.44" 62mm
Average rainfall days
11.1
12.1
15.8
Average snowfall
5.59" 142mm
4.17" 106mm
4.09" 104mm
Average snowfall days
14
13.2
12.2
Average sea temperature
38.8°F 3.8°C
38.9°F 3.8°C
39°F 3.9°C
Average daylight
9h 5min
11h 5min
14h 1min
Average sunshine
3h 1min
3h 5min
4h 2min
Average sunshine days
4.9
6
3.8
Average UV index
1
1
1
Average cloud cover
72%
69%
73%
Average visibility
5mi 8km
5mi 8km
5mi 8km

Average temperature in March
Unalaska, AK

Average temperature in March - Unalaska, AK
  • Average high temperature in March: 34.7°F

The warmest month (with the highest average high temperature) is August (53.2°F).
The month with the lowest average high temperature is March (34.7°F).

  • Average low temperature in March: 30.7°F

The month with the highest average low temperature is August (49.6°F).
The coldest month (with the lowest average low temperature) is March (30.7°F).

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Average pressure in March
Unalaska, AK

Average pressure in March - Unalaska, AK
  • Average pressure in March: 29.77"Hg

The month with the highest atmospheric pressure is July (29.98"Hg).
The month with the lowest atmospheric pressure is January (29.5"Hg).

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Average wind speed in March
Unalaska, AK

Average wind speed in March - Unalaska, AK
  • Average wind speed in March: 14.7mph

The windiest months (with the highest average wind speed) are November and December (16.5mph).
The calmest month (with the lowest average wind speed) is July (9.1mph).

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Average humidity in March
Unalaska, AK

Average humidity in March - Unalaska, AK
  • Average humidity in March: 81%

The month with the highest relative humidity is July (91%).
The months with the lowest relative humidity are November and December (80%).

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Average rainfall in March
Unalaska, AK

Average rainfall in March - Unalaska, AK
  • Average rainfall in March: 2.28"

The wettest month (with the highest rainfall) is December (4.21").
The driest month (with the least rainfall) is July (1.85").

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Average rainfall days in March
Unalaska, AK

Average rainfall days in March - Unalaska, AK
  • Average rainfall days in March: 12.1 days

The month with the highest number of rainy days is October (21.8 days).
The month with the least rainy days is February (11.1 days).

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Average snowfall in March
Unalaska, AK

Average snowfall in March - Unalaska, AK
  • Average snowfall in March: 4.17"

The month with the highest snowfall is January (6.97").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in March
Unalaska, AK

Average snowfall days in March - Unalaska, AK
  • Average snowfall days in March: 13.2 days

The month with the highest number of snowfall days is January (14.2 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average sea temperature in March
Unalaska, AK

Average sea temperature in March - Unalaska, AK
  • Average sea temperature in March: 38.9°F

The best month for swimming (with the highest average sea temperature) is August (50.1°F).
The coldest month (with the lowest average sea temperature) is February (38.8°F).

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Average daylight in March /
Average sunshine in March
Unalaska, AK

Average daylight in March / Average sunshine in March - Unalaska, AK
  • Average daylight in March: 11h and 5min

The month with the longest days is June (Average daylight: 17h and 0min).
The month with the shortest days is December (Average daylight: 7h and 30min).

  • Average sunshine in March: 3h and 5min

The month with the most sunshine is June (Average sunshine: 5h and 48min).
The month with the least sunshine is December (Average sunshine: 2h and 0min).

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Average sunshine days in March
Unalaska, AK

Average sunshine days in March - Unalaska, AK
  • Average sunshine days in March: 6 days

The month with the most sunshine days is August (9.7 days).
The month with the least sunshine days is April (3.8 days).

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Average UV index in March
Unalaska, AK

Average UV index in March - Unalaska, AK
  • Average UV index in March: 1

The months with the highest UV index are July and August (UV index 3).
The months with the lowest UV index are February, March, April and November (UV index 1).

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Average cloud cover in March
Unalaska, AK

Average cloud cover in March - Unalaska, AK
  • Average cloud cover in March: 69

The month with the most cloud cover is July (Cloud cover 74).
The months with the least cloud cover are September and October (Cloud cover 66).

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Average visibility in March
Unalaska, AK

Average visibility in March - Unalaska, AK
  • Average visibility in March: 5mi

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

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Unalaska, Alaska, USA

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