Last updated: June 24, 2025
In March, the average temperature in Portland, United States hovers around 11°C (52°F). Expect chilly minimums of -9°C (16°F) and the occasional warm peak at 28°C (82°F). Additionally, precipitation averages 157 mm (6.2 in) over 14 days, while humidity remains high at 86%, creating a distinct atmosphere for the month.
In March, in Portland, the average temperature is 11°C (52°F). Maximums can reach 28°C (82°F), while minimums can drop as low as -9°C (16°F). Be prepared for a wide range of temperatures and pack accordingly for your trip!
In Portland in March, the precipitation amount is 157 mm (6.2 in) spread over a duration of 14 days.
In Portland in March humidity is 86%. With an average temperature of 11°C (52°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less enjoyable and prompting travelers to seek sheltered spots or indoor attractions to escape the uncomfortable dampness.
In Portland in March, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Portland.
UV Risk Categories
Weather in Portland varies notably across the year, with each month offering distinct climate conditions. This page compares March’s weather to other months in Portland, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | 4°C (40°F) | 105 mm (4.1 inches) | 87% | moderate |
February Weather | 7°C (44°F) | 185 mm (7.3 inches) | 86% | high |
March Weather | 11°C (52°F) | 157 mm (6.2 inches) | 86% | high |
April Weather | 15°C (59°F) | 150 mm (5.9 inches) | 82% | very high |
May Weather | 21°C (70°F) | 122 mm (4.8 inches) | 82% | very high |
June Weather | 25°C (77°F) | 141 mm (5.5 inches) | 83% | extreme |
July Weather | 27°C (80°F) | 125 mm (4.9 inches) | 80% | extreme |
August Weather | 25°C (78°F) | 124 mm (4.9 inches) | 74% | very high |
September Weather | 23°C (74°F) | 125 mm (4.9 inches) | 71% | very high |
October Weather | 17°C (63°F) | 138 mm (5.4 inches) | 78% | high |
November Weather | 9°C (48°F) | 88 mm (3.4 inches) | 88% | moderate |
December Weather | 7°C (45°F) | 147 mm (5.8 inches) | 88% | moderate |