Portland
Oregon, USA
Long-term weather forecast
Long-term weather forecast

March weather forecast and climate
Portland, OR

A colorful autumn view of the outline of Portland City, Oregon, with mountains in the distance
A colorful autumn view of the outline of Portland City, Oregon, with mountains in the distance
March is the beginning of the spring season in Portland, which pushes the average temperatures in the range of a mild 39.9°F (4.4°C) to a warm 57°F (13.9°C).
Spring can be unpredictable with a combination of warm weather, a cold front, or rainy days. The rainfall is to the tune of 3.7" (94mm), and the suburbs may receive light snowfall in March during an unusually cold year. The sunshine improves drastically to 6.5 hours with a drop in humidity and cloud cover.
March is a time for budget travelers to visit Portland with agreeable weather and cheap accommodations.

What is the temperature in March in Portland?

In Portland, Oregon, in March, the average high-temperature is 56.7°F (13.7°C), and the average low-temperature is 39.6°F (4.2°C).

What is the average humidity in March in Portland?

The average relative humidity in March in Portland is 74.6%.

How much does it rain in Portland in March?

In Portland, Oregon, in March, during 17.6 rainfall days, 3.7" (93.5mm) of precipitation is typically accumulated.

What is the last month it snows in Portland?

March is the last month it regularly snows in Portland, Oregon. During 0.2 snowfall days, in March, Portland aggregates 0.2" (5.1mm) of snow.

What is the average length of the day in March in Portland?

In March, the average length of the day in Portland is 12h.

How long on average sun shines in March in Portland?

In Portland, Oregon, the average sunshine in March is 6.2h.

What is the UV index reading in March in Portland?

The average daily maximum UV index in March in Portland, Oregon, is 3. A UV Index of 3 to 5 symbolizes a moderate health threat from the exposure to the Sun's UV radiation.
Average temperature in March - Portland, OR
  • Average high temperature in March: 56.7°F

The warmest month (with the highest average high temperature) is August (81.1°F).
The month with the lowest average high temperature is December (45.6°F).

  • Average low temperature in March: 39.6°F

The month with the highest average low temperature is August (58°F).
The coldest month (with the lowest average low temperature) is December (35.2°F).

Average humidity in March - Portland, OR
  • Average humidity in March: 74.6%

The month with the highest relative humidity is December (82.7%).
The month with the lowest relative humidity is July (62.8%).

Average rainfall in March - Portland, OR
  • Average rainfall in March: 3.7"

The wettest month (with the highest rainfall) is November (5.6").
Driest months (with the lowest rainfall) are July and August (0.7").

Average rainfall days in March - Portland, OR
  • Average rainfall days in March: 17.6 days

The month with the highest number of rainy days is November (19 days).
The month with the lowest number of rainy days is August (3.9 days).

Average snowfall in March - Portland, OR
  • Average snowfall in March: 0.2"

The month with the highest snowfall is February (2.1").
Months with the lowest snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in March - Portland, OR
  • Average snowfall days in March: 0.2 days

Months with the highest number of snowfall days are February and December (1.5 days).
Months with the lowest number of snowfall days are April, May, June, July, August, September and October (0 days).

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

The month with the longest days is June (Average daylight: 15.6h).
The month with shortest days is December (Average daylight: 8.8h).

  • Average sunshine in March: 6.2h

The month with most sunshine is July (Average sunshine: 10.7h).
The month with least sunshine is December (Average sunshine: 2.1h).

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

The month with the highest UV index is July (UV index 8).
Months with the lowest UV index are January and December (UV index 1).