Seattle weather in March: Seattle, Washington: normal highs, lows, rain and records for March
Seattle in March has a normal high of 54°F and a normal low of 40°F, a daily mean of 47°F, rising from 52°F on the 1st to 56°F by the 31st. Measurable precipitation falls on 17 days in a normal March, 4.17 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 12°C and low of 4°C, 106 mm of precipitation and 1 cm of snow in March.
- NOAA stationSeattle Tacoma International Airport
- Station IDUSW00024233
- Location47.44°N 122.31°W
- Elevation370 ft (113 m)
- From the center12 miles
- Population780,995
- Jan 48° 38°
- Feb 50° 38°
- Mar 54° 40°
- Apr 59° 43°
- May 66° 49°
- Jun 71° 53°
- Jul 77° 57°
- Aug 78° 57°
- Sep 72° 54°
- Oct 61° 47°
- Nov 52° 41°
- Dec 47° 37°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Seattle in March?
The normal high is 54°F and the normal low 40°F, for a daily mean of 47.1°F. March is 3.1°F warmer than February and 4.2°F cooler than April. March is the 8th warmest month of the year in Seattle and the 4th wettest. Across the month the normal high rises 4°F, from 52°F on March 1 to 56°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 45°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 56%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| March 1 | 52°F | 38°F | 56% | 35% |
| March 8 | 53°F | 39°F | 56% | 35% |
| March 15 | 54°F | 40°F | 55% | 35% |
| March 22 | 55°F | 41°F | 54% | 34% |
| March 31 | 56°F | 41°F | 52% | 32% |
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 | 52°F | 38°F | 56% | 35% | 11 h |
| March 2 | 52°F | 38°F | 56% | 35% | 11 h |
| March 3 | 52°F | 39°F | 56% | 35% | 11 h 10 min |
| March 4 | 52°F | 39°F | 56% | 35% | 11 h 10 min |
| March 5 | 53°F | 39°F | 56% | 35% | 11 h 10 min |
| March 6 | 53°F | 39°F | 56% | 35% | 11 h 20 min |
| March 7 | 53°F | 39°F | 56% | 35% | 11 h 20 min |
| March 8 | 53°F | 39°F | 56% | 35% | 11 h 20 min |
| March 9 | 53°F | 39°F | 56% | 35% | 11 h 30 min |
| March 10 | 53°F | 39°F | 56% | 35% | 11 h 30 min |
| March 11 | 54°F | 39°F | 56% | 35% | 11 h 30 min |
| March 12 | 54°F | 40°F | 55% | 35% | 11 h 40 min |
| March 13 | 54°F | 40°F | 55% | 35% | 11 h 40 min |
| March 14 | 54°F | 40°F | 55% | 35% | 11 h 50 min |
| March 15 | 54°F | 40°F | 55% | 35% | 11 h 50 min |
| March 16 | 54°F | 40°F | 55% | 35% | 11 h 50 min |
| March 17 | 54°F | 40°F | 55% | 35% | 12 h |
| March 18 | 55°F | 40°F | 55% | 35% | 12 h |
| March 19 | 55°F | 40°F | 54% | 34% | 12 h |
| March 20 | 55°F | 40°F | 54% | 34% | 12 h 10 min |
| March 21 | 55°F | 41°F | 54% | 34% | 12 h 10 min |
| March 22 | 55°F | 41°F | 54% | 34% | 12 h 10 min |
| March 23 | 55°F | 41°F | 54% | 34% | 12 h 20 min |
| March 24 | 55°F | 41°F | 54% | 34% | 12 h 20 min |
| March 25 | 56°F | 41°F | 53% | 33% | 12 h 20 min |
| March 26 | 56°F | 41°F | 53% | 33% | 12 h 30 min |
| March 27 | 56°F | 41°F | 53% | 33% | 12 h 30 min |
| March 28 | 56°F | 41°F | 53% | 33% | 12 h 30 min |
| March 29 | 56°F | 41°F | 52% | 32% | 12 h 40 min |
| March 30 | 56°F | 41°F | 52% | 32% | 12 h 40 min |
| March 31 | 56°F | 41°F | 52% | 32% | 12 h 40 min |
- Normal high
- 54°FMarch average
- Normal low
- 40°FMarch average
- Precipitation
- 4.17 inmonth total
- Days with precipitation
- 170.01 inch or more
- Snowfall
- 0.4 inmonth total
- Nights at 32°F or colder
- 2
- Daylight
- 11 h to 12 h 40 minMarch 1 to March 31
- Sunshine
- 58%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00024233; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain or snow in Seattle in March?
On a given March day the chance of 0.01 inch or more is 55% on average, highest around March 1 (56%). In all, 4.17 in falls on 17 days of a normal March.
In a normal March in Seattle, 2 nights fall to freezing and snowfall averages 0.4 inches.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00024233.
How humid and windy is Seattle in March?
At 3 p.m. the normal temperature is 54°F with 57% relative humidity and a dew point of 39°F; at 6 a.m. it is 42°F with 85% humidity. The wind averages 8.3 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. | 42°F | 38°F | 85% | 7.5 mph | – |
| 9 a.m. | 47°F | 39°F | 75% | 8.2 mph | – |
| noon | 51°F | 39°F | 63% | 9.4 mph | 12% |
| 3 p.m. | 54°F | 39°F | 57% | 9.9 mph | 9% |
| 6 p.m. | 51°F | 38°F | 62% | 8.9 mph | 11% |
| 9 p.m. | 47°F | 39°F | 72% | 8.3 mph | 23% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00024233. 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 Seattle?
The warmest March temperature on this station's record (since 1945) is 79°F, on March 20, 2019; the coldest is 11°F, on March 4, 1955. The wettest March brought 9.44 in (2014); the snowiest, 18.2 inches (1951).
The March mean against the 1991-2020 normal of 47.1°F: 2021 45.6°F (−1.5), 2022 46.9°F (−0.2), 2023 44.6°F (−2.5), 2024 47.1°F (at normal), 2025 47.1°F (at normal), 2026 45.8°F (−1.3). 0 of 6 ran warmer than normal.
| March | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 45.6°F | −1.5°F | 2.61 in |
| 2022 | 46.9°F | −0.2°F | 3.32 in |
| 2023 | 44.6°F | −2.5°F | 2.56 in |
| 2024 | 47.1°F | at normal | 2.36 in |
| 2025 | 47.1°F | at normal | 5.16 in |
| 2026 | 45.8°F | −1.3°F | 6.71 in |
Source: records: ACIS, station USW00024233; recent months: ACIS, station USW00024233. Records and recent months use complete months only.
How does March in Seattle compare across Washington?
Across the 96 places PlainClimate covers in Washington, March normal highs run from 46°F in Bickleton to 59°F in Pasco; Seattle's is 54°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.