Portland weather in March: Portland, Maine: normal highs, lows, rain and records for March
Portland in March has a normal high of 42°F and a normal low of 26°F, a daily mean of 34°F, rising from 38°F on the 1st to 47°F by the 31st. Measurable precipitation falls on 11 days in a normal March, 4.08 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 6°C and low of −3°C, 104 mm of precipitation and 35 cm of snow in March.
- NOAA stationPortland International Jetport
- Station IDUSW00014764
- Location43.65°N 70.30°W
- Elevation45 ft (14 m)
- From the center6 miles
- Population69,568
- Jan 32° 16°
- Feb 35° 17°
- Mar 42° 26°
- Apr 54° 35°
- May 64° 46°
- Jun 74° 55°
- Jul 80° 61°
- Aug 79° 60°
- Sep 71° 52°
- Oct 60° 41°
- Nov 48° 32°
- Dec 38° 22°
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 42°F and the normal low 26°F, for a daily mean of 34.1°F. March is 7.9°F warmer than February and 10.5°F cooler than April. March is the 9th warmest month of the year in Portland and the 6th wettest. Across the month the normal high rises 9°F, from 38°F on March 1 to 47°F on March 31. From one year to the next March's mean temperature typically moves about 3.4°F either way (NOAA's standard deviation), so roughly two Marchs in three average between 31°F and 38°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 37%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| March 1 | 38°F | 21°F | 37% | 23% |
| March 8 | 40°F | 24°F | 37% | 23% |
| March 15 | 42°F | 26°F | 37% | 23% |
| March 22 | 44°F | 28°F | 37% | 22% |
| March 31 | 47°F | 30°F | 37% | 23% |
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 | 38°F | 21°F | 37% | 23% | 11 h 10 min |
| March 2 | 38°F | 22°F | 37% | 23% | 11 h 10 min |
| March 3 | 39°F | 22°F | 37% | 23% | 11 h 10 min |
| March 4 | 39°F | 22°F | 37% | 23% | 11 h 20 min |
| March 5 | 39°F | 23°F | 37% | 23% | 11 h 20 min |
| March 6 | 39°F | 23°F | 37% | 23% | 11 h 20 min |
| March 7 | 40°F | 23°F | 37% | 23% | 11 h 30 min |
| March 8 | 40°F | 24°F | 37% | 23% | 11 h 30 min |
| March 9 | 40°F | 24°F | 37% | 23% | 11 h 30 min |
| March 10 | 40°F | 24°F | 37% | 23% | 11 h 40 min |
| March 11 | 41°F | 25°F | 37% | 23% | 11 h 40 min |
| March 12 | 41°F | 25°F | 37% | 23% | 11 h 40 min |
| March 13 | 41°F | 25°F | 37% | 23% | 11 h 40 min |
| March 14 | 42°F | 26°F | 37% | 23% | 11 h 50 min |
| March 15 | 42°F | 26°F | 37% | 23% | 11 h 50 min |
| March 16 | 42°F | 26°F | 37% | 23% | 11 h 50 min |
| March 17 | 42°F | 26°F | 37% | 23% | 12 h |
| March 18 | 43°F | 27°F | 37% | 22% | 12 h |
| March 19 | 43°F | 27°F | 37% | 22% | 12 h |
| March 20 | 43°F | 27°F | 37% | 22% | 12 h 10 min |
| March 21 | 44°F | 28°F | 37% | 22% | 12 h 10 min |
| March 22 | 44°F | 28°F | 37% | 22% | 12 h 10 min |
| March 23 | 44°F | 28°F | 37% | 22% | 12 h 10 min |
| March 24 | 45°F | 28°F | 37% | 22% | 12 h 20 min |
| March 25 | 45°F | 29°F | 37% | 22% | 12 h 20 min |
| March 26 | 45°F | 29°F | 37% | 22% | 12 h 20 min |
| March 27 | 46°F | 29°F | 37% | 23% | 12 h 30 min |
| March 28 | 46°F | 30°F | 37% | 23% | 12 h 30 min |
| March 29 | 47°F | 30°F | 37% | 23% | 12 h 30 min |
| March 30 | 47°F | 30°F | 37% | 23% | 12 h 40 min |
| March 31 | 47°F | 30°F | 37% | 23% | 12 h 40 min |
- Normal high
- 42°FMarch average
- Normal low
- 26°FMarch average
- Precipitation
- 4.08 inmonth total
- Days with precipitation
- 110.01 inch or more
- Snowfall
- 13.6 inmonth total
- Nights at 32°F or colder
- 25
- Daylight
- 11 h 10 min to 12 h 40 minMarch 1 to March 31
- Sunshine
- 69%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014764; 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 37% on average, highest around March 31 (37%). In all, 4.08 in falls on 11 days of a normal March, 1 of them with an inch or more.
In a normal March in Portland, 25 nights fall to freezing, 4 days stay below freezing all day and snowfall averages 13.6 inches.
Snow falls on 5 days in a normal March, and an inch or more covers the ground on 16 days.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014764.
How humid and windy is Portland in March?
At 3 p.m. the normal temperature is 45°F with 50% relative humidity and a dew point of 28°F; at 6 a.m. it is 33°F with 74% humidity. The wind averages 9.2 mph, most often from the west in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 33°F | 26°F | 74% | 6.8 mph | 47% |
| 9 a.m. | 40°F | 26°F | 57% | 10.2 mph | 50% |
| noon | 45°F | 27°F | 50% | 11.8 mph | 43% |
| 3 p.m. | 45°F | 28°F | 50% | 12.6 mph | 45% |
| 6 p.m. | 42°F | 28°F | 58% | 10.2 mph | 45% |
| 9 p.m. | 38°F | 28°F | 66% | 7.5 mph | 53% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00014764. 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 March mean against the 1991-2020 normal of 34.1°F: 2021 34.9°F (+0.8), 2022 35.7°F (+1.6), 2023 35.7°F (+1.6), 2024 37.9°F (+3.8), 2025 35.8°F (+1.7), 2026 35.1°F (+1.0). 6 of 6 ran warmer than normal.
| March | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 34.9°F | +0.8°F | 2.78 in |
| 2022 | 35.7°F | +1.6°F | 3.06 in |
| 2023 | 35.7°F | +1.6°F | 2.84 in |
| 2024 | 37.9°F | +3.8°F | 11.00 in |
| 2025 | 35.8°F | +1.7°F | 4.40 in |
| 2026 | 35.1°F | +1.0°F | 4.22 in |
Source: records: ACIS, NWS threaded record PWMthr; recent months: ACIS, station USW00014764. Records and recent months use complete months only.
How does March in Portland compare across Maine?
Across the 42 places PlainClimate covers in Maine, March normal highs run from 33°F in Limestone to 44°F in Sanford; Portland's is 42°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.