Portland Weather in March
In Portland, March brings moderate daytime temperatures around 13°C (55°F), with nights cooling to 4°C (39°F). Expect quite a bit of rainfall this month.
Rainfall in Portland in March
The climate data from previous years indicates about 20 days of rain, averaging 125 mm (4.9 in) for the month. Wet weather is a regular and significant part of this month. Frequent days of rain combined with high totals means proper waterproofs are worth packing.
Temperature in Portland in March
March in Portland brings moderate temperatures, with highs of 13°C (55°F) and nights around 4°C (39°F). Temperatures can feel cooler in the morning and evening, so layering is often the best approach. With overnight lows of 4°C (39°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.
Sunshine in Portland in March
There are approximately 191 hours of sunshine this month, resulting in mostly clear days. Despite the cool temperatures, the sunshine makes it an enjoyable time to be outside.
Wind Speed in Portland in March
Average wind speeds reach 3 m/s (6 knots) in March, creating light breezes that feel pleasant throughout the day. Some days are calmer, while others bring slightly more active breezes.If you're looking for dry conditions and comfortable temperatures, March may not be the ideal month to visit Portland. Our weather planner can help you explore destinations with more pleasant weather conditions.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Portland's climate page.
Portland Temperature in March
Min Temperature
4°C (39°F)
Max Temperature
13°C (55°F)
Chance of Rain
67%
Precipitation
125 mm (4.9 in)
Rainy days
20 days
Humidity
75%
Windspeed
3 m/s (6 knots)
Sunshine
191 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Portland typically stay consistent throughout March, with daily highs averaging around 13°C (55°F). Nights are cold, with lows typically ranging from 3°C (37°F) to 6°C (43°F).
Average temperatures in March
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in March
Historical weather for Portland in March
Browse day-by-day weather records for Portland spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Portland historical weather extremes in March
The extremes listed below come from historical weather data collected in Portland from 1976 through 2026.
- On March 26, 2025, temperatures climbed to 27°C (81°F), marking the warmest March day on record.
- On March 2, 1989, Portland saw its coldest March day with temperatures maxing out at 1°C (34°F).
- The coldest night in March in Portland was on March 3, 1989, with a minimum of -6°C (21°F).
- The wettest March day on record brought 44 mm (1.7 in) of precipitation to Portland (March 28, 2014).
Best Places in the United States of America in March
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in March →
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What to Wear in Portland in March
Pack for changing conditions in Portland in March. Bring a mix of short and long sleeves, a warm layer like a hoodie or light jacket, and comfortable pants. The key is being able to add or remove layers as the days goes by. Prepare for significant rainfall with proper waterproof clothing and shoes. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Portland in March
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Portland's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Portland climate overview or explore weather in the United States of America.
