Hillsboro weather in March: Hillsboro, Oregon: normal highs, lows, rain and records for March
Hillsboro in March has a normal high of 56°F and a normal low of 37°F, a daily mean of 46°F, rising from 54°F on the 1st to 58°F by the 31st. Measurable precipitation falls on 18 days in a normal March, 3.70 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 13°C and low of 3°C, 94 mm of precipitation in March.
- NOAA stationPortland-Hillsboro Airport
- Station IDUSW00094261
- Location45.54°N 122.95°W
- Elevation204 ft (62 m)
- Population110,337
- Jan 47° 34°
- Feb 51° 34°
- Mar 56° 37°
- Apr 61° 39°
- May 69° 45°
- Jun 74° 49°
- Jul 82° 52°
- Aug 82° 52°
- Sep 76° 48°
- Oct 64° 41°
- Nov 53° 37°
- Dec 46° 33°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Hillsboro in March?
The normal high is 56°F and the normal low 37°F, for a daily mean of 46.2°F. March is 3.9°F warmer than February and 3.9°F cooler than April. March is the 8th warmest month of the year in Hillsboro and the 5th wettest. Across the month the normal high rises 4°F, from 54°F on March 1 to 58°F on March 31. From one year to the next March's mean temperature typically moves about 2.3°F either way (NOAA's standard deviation), so roughly two Marchs in three average between 44°F and 49°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 59%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| March 1 | 54°F | 35°F | 58% | 36% |
| March 8 | 55°F | 36°F | 59% | 36% |
| March 15 | 56°F | 37°F | 59% | 35% |
| March 22 | 57°F | 37°F | 59% | 34% |
| March 31 | 58°F | 38°F | 58% | 31% |
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 | 35°F | 58% | 36% | 11 h |
| March 2 | 54°F | 35°F | 58% | 36% | 11 h 10 min |
| March 3 | 54°F | 35°F | 58% | 36% | 11 h 10 min |
| March 4 | 54°F | 35°F | 58% | 36% | 11 h 10 min |
| March 5 | 54°F | 35°F | 59% | 36% | 11 h 20 min |
| March 6 | 55°F | 35°F | 59% | 36% | 11 h 20 min |
| March 7 | 55°F | 35°F | 59% | 36% | 11 h 20 min |
| March 8 | 55°F | 36°F | 59% | 36% | 11 h 30 min |
| March 9 | 55°F | 36°F | 59% | 36% | 11 h 30 min |
| March 10 | 55°F | 36°F | 59% | 36% | 11 h 30 min |
| March 11 | 55°F | 36°F | 59% | 36% | 11 h 40 min |
| March 12 | 56°F | 36°F | 59% | 36% | 11 h 40 min |
| March 13 | 56°F | 36°F | 59% | 35% | 11 h 40 min |
| March 14 | 56°F | 36°F | 59% | 35% | 11 h 50 min |
| March 15 | 56°F | 37°F | 59% | 35% | 11 h 50 min |
| March 16 | 56°F | 37°F | 59% | 35% | 11 h 50 min |
| March 17 | 56°F | 37°F | 59% | 35% | 12 h |
| March 18 | 56°F | 37°F | 59% | 34% | 12 h |
| March 19 | 56°F | 37°F | 59% | 34% | 12 h |
| March 20 | 57°F | 37°F | 59% | 34% | 12 h 10 min |
| March 21 | 57°F | 37°F | 59% | 34% | 12 h 10 min |
| March 22 | 57°F | 37°F | 59% | 34% | 12 h 10 min |
| March 23 | 57°F | 37°F | 59% | 33% | 12 h 20 min |
| March 24 | 57°F | 38°F | 59% | 33% | 12 h 20 min |
| March 25 | 57°F | 38°F | 59% | 33% | 12 h 20 min |
| March 26 | 57°F | 38°F | 59% | 33% | 12 h 30 min |
| March 27 | 57°F | 38°F | 59% | 32% | 12 h 30 min |
| March 28 | 57°F | 38°F | 59% | 32% | 12 h 30 min |
| March 29 | 57°F | 38°F | 58% | 32% | 12 h 30 min |
| March 30 | 58°F | 38°F | 58% | 32% | 12 h 40 min |
| March 31 | 58°F | 38°F | 58% | 31% | 12 h 40 min |
- Normal high
- 56°FMarch average
- Normal low
- 37°FMarch average
- Precipitation
- 3.70 inmonth total
- Days with precipitation
- 180.01 inch or more
- Nights at 32°F or colder
- 9
- 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 USW00094261; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Hillsboro in March?
On a given March day the chance of 0.01 inch or more is 59% on average, highest around March 21 (59%). In all, 3.70 in falls on 18 days of a normal March.
In a normal March in Hillsboro, 9 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00094261.
How humid and windy is Hillsboro in March?
At 3 p.m. the normal temperature is 56°F with 55% relative humidity and a dew point of 40°F; at 6 a.m. it is 41°F with 92% humidity. The wind averages 5.4 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. | 41°F | 39°F | 92% | 3.2 mph | – |
| 9 a.m. | 47°F | 41°F | 80% | 4.7 mph | – |
| noon | 53°F | 41°F | 63% | 7.2 mph | – |
| 3 p.m. | 56°F | 40°F | 55% | 7.9 mph | 30% |
| 6 p.m. | 54°F | 41°F | 62% | 7.5 mph | 36% |
| 9 p.m. | 47°F | 41°F | 78% | 5.5 mph | 47% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00094261. 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 Hillsboro?
The warmest March temperature on Hillsboro's official record (since 1929) is 83°F, on March 28, 1930; the coldest is 18°F, on March 1, 1960. The wettest March brought 8.32 in (1961); the snowiest, 5.0 inches (1960).
The March mean against the 1991-2020 normal of 46.2°F: 2021 44.0°F (−2.2), 2022 46.7°F (+0.5), 2023 42.6°F (−3.6), 2024 46.7°F (+0.5), 2025 47.5°F (+1.3), 2026 48.4°F (+2.1). 4 of 6 ran warmer than normal.
| March | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 44.0°F | −2.2°F | 1.28 in |
| 2022 | 46.7°F | +0.5°F | 1.94 in |
| 2023 | 42.6°F | −3.6°F | 4.45 in |
| 2024 | 46.7°F | +0.5°F | 3.47 in |
| 2025 | 47.5°F | +1.3°F | 4.28 in |
| 2026 | 48.4°F | +2.1°F | 3.73 in |
Source: records: ACIS, NWS threaded record HIOthr; recent months: ACIS, station USW00094261. Records and recent months use complete months only.
How does March in Hillsboro 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; Hillsboro's is 56°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.