Portland weather in March: Portland, Oregon: normal highs, lows, rain and records for March
Portland in March has a normal high of 57°F and a normal low of 40°F, a daily mean of 48°F, rising from 54°F on the 1st to 59°F by the 31st. Measurable precipitation falls on 18 days in a normal March, 3.97 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 14°C and low of 4°C, 101 mm of precipitation and 0 cm of snow in March.
- NOAA stationPortland International Airport
- Station IDUSW00024229
- Location45.59°N 122.60°W
- Elevation19 ft (6 m)
- From the center4 miles
- Population635,749
- Jan 48° 36°
- Feb 52° 37°
- Mar 57° 40°
- Apr 62° 44°
- May 69° 49°
- Jun 74° 54°
- Jul 82° 59°
- Aug 82° 59°
- Sep 77° 54°
- Oct 64° 47°
- Nov 54° 41°
- Dec 47° 36°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Portland in March?
The normal high is 57°F and the normal low 40°F, for a daily mean of 48.3°F. March is 4.2°F warmer than February and 4.5°F cooler than April. March is the 8th warmest month of the year in Portland and the 4th wettest. Across the month the normal high rises 5°F, from 54°F on March 1 to 59°F on March 31. From one year to the next March's mean temperature typically moves about 2.2°F either way (NOAA's standard deviation), so roughly two Marchs in three average between 46°F and 51°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 58%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| March 1 | 54°F | 38°F | 57% | 36% |
| March 8 | 56°F | 39°F | 57% | 36% |
| March 15 | 57°F | 40°F | 58% | 36% |
| March 22 | 58°F | 41°F | 58% | 35% |
| March 31 | 59°F | 42°F | 58% | 33% |
Every day of March: normal high, low and chance of precipitation (warmest afternoon March 31, coldest night March 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| March 1 | 54°F | 38°F | 57% | 36% | 11 h |
| March 2 | 54°F | 38°F | 57% | 36% | 11 h 10 min |
| March 3 | 55°F | 38°F | 57% | 36% | 11 h 10 min |
| March 4 | 55°F | 38°F | 57% | 36% | 11 h 10 min |
| March 5 | 55°F | 38°F | 57% | 36% | 11 h 20 min |
| March 6 | 55°F | 38°F | 57% | 36% | 11 h 20 min |
| March 7 | 55°F | 39°F | 57% | 36% | 11 h 20 min |
| March 8 | 56°F | 39°F | 57% | 36% | 11 h 30 min |
| March 9 | 56°F | 39°F | 57% | 36% | 11 h 30 min |
| March 10 | 56°F | 39°F | 57% | 36% | 11 h 30 min |
| March 11 | 56°F | 39°F | 57% | 36% | 11 h 40 min |
| March 12 | 56°F | 39°F | 57% | 36% | 11 h 40 min |
| March 13 | 57°F | 39°F | 58% | 36% | 11 h 40 min |
| March 14 | 57°F | 39°F | 58% | 36% | 11 h 50 min |
| March 15 | 57°F | 40°F | 58% | 36% | 11 h 50 min |
| March 16 | 57°F | 40°F | 58% | 36% | 11 h 50 min |
| March 17 | 57°F | 40°F | 58% | 35% | 12 h |
| March 18 | 57°F | 40°F | 58% | 35% | 12 h |
| March 19 | 57°F | 40°F | 58% | 35% | 12 h |
| March 20 | 58°F | 40°F | 58% | 35% | 12 h 10 min |
| March 21 | 58°F | 40°F | 58% | 35% | 12 h 10 min |
| March 22 | 58°F | 41°F | 58% | 35% | 12 h 10 min |
| March 23 | 58°F | 41°F | 58% | 35% | 12 h 20 min |
| March 24 | 58°F | 41°F | 58% | 35% | 12 h 20 min |
| March 25 | 58°F | 41°F | 58% | 34% | 12 h 20 min |
| March 26 | 58°F | 41°F | 58% | 34% | 12 h 30 min |
| March 27 | 58°F | 41°F | 58% | 34% | 12 h 30 min |
| March 28 | 59°F | 41°F | 58% | 34% | 12 h 30 min |
| March 29 | 59°F | 41°F | 58% | 34% | 12 h 30 min |
| March 30 | 59°F | 42°F | 58% | 34% | 12 h 40 min |
| March 31 | 59°F | 42°F | 58% | 33% | 12 h 40 min |
- Normal high
- 57°FMarch average
- Normal low
- 40°FMarch average
- Precipitation
- 3.97 inmonth total
- Days with precipitation
- 180.01 inch or more
- Snowfall
- 0.1 inmonth total
- Nights at 32°F or colder
- 3
- Daylight
- 11 h to 12 h 40 minMarch 1 to March 31
- Days at 70°F or more
- 1
- Sunshine
- 59%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00024229; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain or snow in Portland in March?
On a given March day the chance of 0.01 inch or more is 58% on average, highest around March 24 (58%). In all, 3.97 in falls on 18 days of a normal March.
In a normal March in Portland, 3 nights fall to freezing and snowfall averages 0.1 inches.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00024229.
How humid and windy is Portland in March?
At 3 p.m. the normal temperature is 57°F with 53% relative humidity and a dew point of 40°F; at 6 a.m. it is 43°F with 86% humidity. The wind averages 7.1 mph, most often from the southwest in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 43°F | 40°F | 86% | 5.4 mph | – |
| 9 a.m. | 48°F | 41°F | 77% | 7.0 mph | – |
| noon | 53°F | 40°F | 61% | 8.6 mph | – |
| 3 p.m. | 57°F | 40°F | 53% | 9.0 mph | – |
| 6 p.m. | 54°F | 40°F | 58% | 8.5 mph | 17% |
| 9 p.m. | 50°F | 40°F | 71% | 7.0 mph | 30% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00024229. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for March in Portland?
The warmest March temperature on Portland's official record (since 1940) is 82°F, on March 26, 2025; the coldest is 19°F, on March 5, 1955. The wettest March brought 7.89 in (2012); the snowiest, 12.9 inches (1951).
The March mean against the 1991-2020 normal of 48.3°F: 2021 47.2°F (−1.1), 2022 49.9°F (+1.6), 2023 45.2°F (−3.1), 2024 50.0°F (+1.7), 2025 50.8°F (+2.5), 2026 50.0°F (+1.8). 4 of 6 ran warmer than normal.
| March | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 47.2°F | −1.1°F | 1.55 in |
| 2022 | 49.9°F | +1.6°F | 2.96 in |
| 2023 | 45.2°F | −3.1°F | 4.36 in |
| 2024 | 50.0°F | +1.7°F | 2.70 in |
| 2025 | 50.8°F | +2.5°F | 4.68 in |
| 2026 | 50.0°F | +1.8°F | 5.03 in |
Source: records: ACIS, NWS threaded record PDXthr; recent months: ACIS, station USW00024229. Records and recent months use complete months only.
How does March in Portland compare across Oregon?
Across the 105 places PlainClimate covers in Oregon, March normal highs run from 41°F in Government Camp to 62°F in Riddle; Portland's is 57°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.