Hillsboro, OR weather in March
In March, Hillsboro sees highs around 55°F and lows around 36°F: cool, with rain on most days. Expect about 18 wet days. Pack rain gear.
- Normal high
- 55°F
- Normal low
- 36°F
- Wet days
- 18
- 4.8 in total
- Muggy days
- 0
- dew point 65°F+
How March changes from start to finish
| March 1 | March 31 | |
|---|---|---|
| Normal high | 52°F | 57°F |
| Normal low | 34°F | 37°F |
| Chance of a wet day | 57% | 56% |
| Sunrise / sunset | 6:50 am / 5:58 pm | 6:53 am / 7:38 pm |
| Daylight | 11.1 h | 12.7 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Pacific Time).
A typical March day
- 6 am40°Fdew point 37°F
- 9 am45°Fdew point 40°F
- Noon51°Fdew point 40°F
- 3 pm54°Fdew point 39°F
- 6 pm51°Fdew point 40°F
- 9 pm46°Fdew point 40°F
NOAA hourly normals (local standard time) from Portland-Hillsboro Airport (2 mi away); average wind 5 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F4 of 31
- Hot dayshigh 90°F or more0 of 31
- Muggy daysdaily mean dew point 65°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow18 of 31
- Notable rainat least 0.10 in11 of 31
- Freezing nightslow 32°F or below8 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per March, counted from daily records for each year 1991-2020.
Rain in March
Normal precipitation is 4.8 in; a dry March brings about 2.6 in and a wet one about 6.4 in (25th and 75th percentiles). About 3 days bring half an inch or more, and about 1 an inch or more. Snow is very rare.
How March varies from year to year
- Warmest March, 1991-20201992: average high 65°F
- Coolest March2012: average high 49°F
- Wettest March2012: 10.9 in
- Driest March2019: 1.1 in
- Highest reading82°F (March 26, 1994)
- Lowest reading19°F (March 6, 2019)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
March compared with February and April
| February | March | April | |
|---|---|---|---|
| Normal high | 49°F | 55°F | 60°F |
| Normal low | 33°F | 36°F | 39°F |
| Wet days | 15 | 18 | 16 |
| Comfortable days | 1 | 4 | 8 |
| Daylight | 10.4 h | 11.9 h | 13.5 h |
Highs change by +6°F from February and +5°F into April.
Nearby alternatives in March
- Drier: Bend, OR130 mi · high 52°F · 6 wet days
How Hillsboro ranks in March
- Normal high232nd warmest of 378 cities; 4th of 6 in Oregon
- Wet days367th driest of 378
- Comfortable days227th most of 339
What to pack for Hillsboro in March
- A warm jacket – lows near 36°F, highs near 55°F
- A rain jacket or umbrella – rain on about 18 days
Heating and cooling
March has 612 heating degree days and 0 cooling degree days (base 65°F), 11% of the year's total heating and cooling demand.
Questions
How cold is Hillsboro in March?
The normal high is 55°F and the normal low is 36°F. From 1991 to 2020 the coldest March reading was 19°F (most recently on March 6, 2019).
Does it rain a lot in Hillsboro in March?
About 18 days in March have at least 0.01 in of precipitation, and the normal total is 4.8 in. The wettest March in 1991-2020 was in 2012 (11.0 in); the driest was in 2019 (1.1 in).
Does it snow in Hillsboro in March?
Snow is very rare: the 1991-2020 normal for March rounds to 0.0 in.
Is March a good time to visit Hillsboro?
March ranks 8th of 12 months on our comfort score for Hillsboro (49 out of 100). It has about 4 comfortable days. The best month is June.
Where the numbers come from
- Temperature and snow depth: Forest Grove (USC00352997), 5.5 mi W of the city center, 180 ft . NOAA normals and daily records, 1991-2020.
- Rain and snowfall: Dilley 2 S (USC00352325), 7.3 mi SW of the city center, 194 ft . NOAA normals and daily records, 1991-2020.
- Frost dates and humidity and wind by hour: Portland-Hillsboro Airport (USW00094261), 2.3 mi ENE of the city center, 204 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Portland International Airport (726980-24229), 19 mi ENE of the city center, 22 ft (173 ft lower than the city). Hourly observations, 1991-2020.
- Not available for this location: cloud cover (no station close enough or similar enough in elevation).