Seattle weather in March
Seattle in March averages 8°C (46°F) and 106 mm of rain.
Of the twelve months in Seattle, March is the fifth coldest and the fourth wettest.
- Average temp
- 8°C (46°F)
4–12°C · 40–53°F
- Rainfall
- 106 mm
Showers likely
- Sunshine
- —
- Wind
- 14 km/h
What is Seattle like in March?
Daytime
Days are cool.
Rain
Some rain is likely; pack for showers.
Evening
Evenings are cooler. A layer helps after sunset.
What should I pack for Seattle in March?
A light rain jacket
About 106 mm falls this month — showers rather than washouts.
A warm mid-layer
Nights drop to around 4°C (40°F).
March compared with February and April
March in Seattle is 1.7°C warmer than February and 10 mm wetter than it, which averages 6°C (43°F).
March in Seattle is 2.4°C cooler than April and 25 mm wetter than it, which averages 10°C (51°F).
Daylight in Seattle in March
On 15 March the sun is up for 11 hours 55 minutes in Seattle, rising about 07:20 and setting about 19:15 local time.
March ends 1 hour 43 minutes longer than it begins, so the last week of the month is a different length of day from the first.
That is 4 hours 3 minutes short of June, the longest-lit month here.
Where to stay in Seattle
Dates are a starting point for March.
Travel guides for Seattle
What to read before you book.
Seattle weather by month
TemperatureRainfall
How March compares with the rest of the year
March is highlighted. Every other month links to its own page.
| Month | Average | Rainfall |
|---|---|---|
| January | 6°C / 42°F | 147 mm |
| February | 6°C / 43°F | 96 mm |
| March | 8°C / 46°F | 106 mm |
| April | 10°C / 51°F | 81 mm |
| May | 14°C / 57°F | 48 mm |
| June | 16°C / 62°F | 37 mm |
| July | 19°C / 67°F | 15 mm |
| August | 19°C / 67°F | 25 mm |
| September | 17°C / 62°F | 41 mm |
| October | 12°C / 53°F | 99 mm |
| November | 8°C / 46°F | 160 mm |
| December | 5°C / 41°F | 147 mm |
Check another month
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FAQs about Seattle in March
March climate averages for Seattle, 1991–2020.
Seattle averages 8°C (46°F) in March, ranging from about 4°C (40°F) at night to 12°C (53°F) in the afternoon. That is a 1991–2020 average, so an individual week can run either side of it.
Some. About 106 mm falls across March, enough to need a light jacket but not enough to reshape a trip.
No. March averages 8°C (46°F) against 10°C (51°F) in April — 2.4°C cooler.
March is 1.7°C warmer than February, and 10 mm wetter.
It is outside the easiest window. The most comfortable stretch here is May to October; March sits outside it, which usually means more heat, more rain, or both — worth it if you would rather have the place to yourself.
This page does not show today's weather. It is a 1991–2020 climate normal from Meteostat — a long-run average of what March is usually like, which is what you want when booking months ahead. For today or the coming week, check a live forecast.
About 11 hours 55 minutes of daylight in mid-March, against 15 hours 58 minutes in June and 8 hours 27 minutes in December.
On 15 March, sunrise is about 07:20 and sunset about 19:15 local time. Both shift across the month — the month ends 1 hour 43 minutes longer than it starts.
