March weather forecast
Portland, OR

englishespañol中文
Share
A colorful autumn view of the outline of Portland City, Oregon, USA
A colorful autumn view of the outline of Portland City, Oregon, USA

Weather in March

As March arrives, it brings along a wave of warmer weather to Portland. The month records a relatively higher rainfall of about 3.39" (86mm) which signals the dawn of spring. Light showers and mild temperatures make the landscapes of the city truly beautiful. Proportionately, the daylight hours also increase, inviting residents to undertake outdoor activities. This is an idyllic month for nature lovers who wish to explore the varied flora in and around the city.

Temperature

March's onset records an average high-temperature of a fresh 52.5°F (11.4°C), a near match to February's 47.5°F (8.6°C). During the month of March, an average low-temperature of 38.1°F (3.4°C) is recorded.

Humidity

In March, the average relative humidity is 81%.

Rainfall

In Portland, during March, the rain falls for 20.4 days and regularly aggregates up to 3.39" (86mm) of precipitation. Throughout the year, there are 173.1 rainfall days, and 31.18" (792mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Portland are January through March, November and December. March is the month with the most snowfall. Snow falls for 1.6 days and accumulates 1.5" (38mm) of snow.

Daylight

In Portland, the average length of the day in March is 11h and 58min.
On the first day of the month, sunrise is at 6:47 am and sunset at 5:58 pm PST. On the last day of March, sunrise is at 6:50 am and sunset at 7:38 pm PDT.
Note: On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from PST to PDT. Daylight Saving Time lasts until Sunday, November 3. 2024, at 2:00 am; consequently, the time zone reverts from PDT to PST.

Sunshine

In March, the average sunshine is 5.9h.

UV index

In Portland, the average daily maximum UV index in March is 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the average person.
Note: During March, 3 as the daily maximum UV index converts into the following advice:
Ensure safety - Recommendations to avert sunburn are presented. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Updated: Jun 4, 2024 | Published by: Weather Atlas | About Us / Weather Forecasting / Data Sources

Frequently asked questions

What is the temperature in March?

In Portland, in March, the average high-temperature is 52.5°F (11.4°C), and the average low-temperature is 38.1°F (3.4°C).

What is the average humidity in March?

In March, the average relative humidity is 81%.

How many days does it rain in March?

In Portland, in March, during 20.4 rainfall days, 3.39" (86mm) of precipitation is typically accumulated.

What is the snowiest month?

March is the month with the most snowfall. Snow falls for 1.6 days and accumulates 1.5" (38mm) of snow.

What is the last month it snows?

March is the last month it regularly snows. During 1.6 snowfall days, in March, Portland aggregates 1.5" (38mm) of snow.

How many hours of daylight does Portland have in March?

In Portland, the average day length in March is 11h and 58min.

What time are sunrise and sunset in March?

On the first day of March, sunrise is at 6:47 am and sunset at 5:58 pm PST. On the last day of the month, sunrise is at 6:50 am and sunset at 7:38 pm PDT.

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

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

How long on average sun shines in March?

The average sunshine duration in March in Portland is 5.9h.

What is the UV index reading in March?

In Portland, the average daily maximum UV index in March is 3. A UV Index reading of 3 to 5 represents a medium hazard to health from exposure to the Sun's UV radiation.
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
Portland, OR

Average temperature in March - Portland, OR
  • Average high temperature in March: 52.5°F

The warmest month (with the highest average high temperature) is August (81.5°F).
The month with the lowest average high temperature is December (44.1°F).

  • Average low temperature in March: 38.1°F

The month with the highest average low temperature is August (55°F).
The coldest month (with the lowest average low temperature) is December (34.7°F).

Average pressure in March
Portland, OR

Average pressure in March - Portland, OR
  • Average pressure in March: 30.03"Hg

The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).

Average wind speed in March
Portland, OR

Average wind speed in March - Portland, OR
  • Average wind speed in March: 5.3mph

The windiest month (with the highest average wind speed) is January (5.8mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).

Average humidity in March
Portland, OR

Average humidity in March - Portland, OR
  • Average humidity in March: 81%

The months with the highest relative humidity are January, February and December (83%).
The month with the lowest relative humidity is August (63%).

Average rainfall in March
Portland, OR

Average rainfall in March - Portland, OR
  • Average rainfall in March: 3.39"

The wettest month (with the highest rainfall) is December (4.53").
The driest month (with the least rainfall) is July (0.31").

Average rainfall days in March
Portland, OR

Average rainfall days in March - Portland, OR
  • Average rainfall days in March: 20.4 days

The month with the highest number of rainy days is March (20.4 days).
The month with the least rainy days is July (4.9 days).

Average snowfall in March
Portland, OR

Average snowfall in March - Portland, OR
  • Average snowfall in March: 1.5"

The month with the highest snowfall is March (1.5").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in March
Portland, OR

Average snowfall days in March - Portland, OR
  • Average snowfall days in March: 1.6 days

The month with the highest number of snowfall days is February (2.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in March /
Average sunshine in March
Portland, OR

Average daylight in March / Average sunshine in March - Portland, OR
  • Average daylight in March: 12h and 0min

The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).

  • Average sunshine in March: 5h and 5min

The month with the most sunshine is August (Average sunshine: 10h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).

Average sunshine days in March
Portland, OR

Average sunshine days in March - Portland, OR
  • Average sunshine days in March: 8.3 days

The months with the most sunshine days are July and August (23.8 days).
The month with the least sunshine days is March (8.3 days).

Average UV index in March
Portland, OR

Average UV index in March - Portland, OR
  • Average UV index in March: 3

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in March
Portland, OR

Average cloud cover in March - Portland, OR
  • Average cloud cover in March: 56

The month with the most cloud cover is February (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 23).

Average visibility in March
Portland, OR

Average visibility in March - Portland, OR
  • Average visibility in March: 5mi

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

Portland, Oregon, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location