Portland weather in March
March in Portland: cool, rainy, with clean air — a good time to visit.
#8 of 12 months in Portland · #422 of 604 destinations to visit in March · comfort 69/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Portland climate normals — March
| Daytime high | 13°C / 55°F | 🙂 cool |
|---|---|---|
| Nighttime low | 3°C / 37°F | |
| Feels like (high) | 10°C / 50°F | |
| Rainfall | 97 mm / 3.8 in | 🌧 rainy |
| Rainy days | 17 days | |
| Humidity | 83% | 💦 very humid |
| Dew point | 4°C / 39°F | |
| Sunshine | 7.9 h/day | |
| Daylight | 11.9 h | |
| Wind | 13 km/h / 8 mph | |
| Snowfall | 2.8 cm / 1.1 in | |
| Air quality (US AQI) | 39 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Portland in March — FAQ
- Is March a good time to visit Portland?
- March in Portland: cool, rainy, with clean air — a good time to visit. It ranks #8 of 12 months for Portland on SeasonMap's comfort score (69/100).
- What is the weather like in Portland in March?
- In March, Portland averages a daily high of 12.5°C and a low of 2.5°C, with about 97.4 mm of rain over roughly 17.2 rainy days.
- What is the air quality in Portland in March?
- Portland has a mean US Air Quality Index of about 39 in March.
- Does it snow in Portland in March?
- Portland sees roughly 2.8 cm of snowfall in March.