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Will it freeze in Mukilteo in the next 7 nights?
No overnight lows at or below 32°F are forecast in Mukilteo during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 48°F. Above 36°F.
NWS forecast period: Thu, Nov 5, 6:00 PM PST to Fri, Nov 6, 6:00 AM PST.
No nights at or below 36°F in the National Weather Service forecast for the next 7 nights.
- Tonight 48°F Above 36°F · Mostly Cloudy then Chance Light Rain
- Fri, Nov 6 52°F Above 36°F · Light Rain Likely
- Sat, Nov 7 51°F Above 36°F · Light Rain
- Sun, Nov 8 43°F Above 36°F · Partly Cloudy
- Mon, Nov 9 50°F Above 36°F · Light Rain
- Tue, Nov 10 53°F Above 36°F · Light Rain Likely
- Wed, Nov 11 51°F Above 36°F · Light Rain Likely
Overnight lows from the National Weather Service forecast for this location. This covers the available forecast window, not the first freeze of the whole season. Frost can form above 32°F on clear, calm nights.
Frost and freeze probabilities
Freeze dates shift from year to year. Spring percentages describe the chance of a freeze after the stated date; fall percentages describe the chance of a freeze by that date. The 10% spring date is the cautious one: a later freeze happens about 1 year in 10.
These dates describe historical probabilities, not this year’s forecast or the earliest and latest possible freezes. Different weather stations or probability thresholds can produce different published dates for the same city.
Average first hard freeze in Mukilteo
The median first fall hard-freeze date (28°F) is December 6, from NOAA’s 1991–2020 Climate Normals at Everett Snohomish Airport. This is the 50% probability date, not a forecast for this year.
| Temperature | Last spring date 90% · 50% · 10% chance of a later freeze | First fall date 10% · 50% · 90% chance of an earlier freeze | Season |
|---|---|---|---|
| 36°F frost possible | Mar 15 · Apr 3 · Apr 27 | Oct 19 · Nov 2 · Nov 20 | 211 days |
| 32°F freeze | Feb 15 · Mar 9 · Mar 29 | Oct 31 · Nov 17 · Dec 7 | 250 days |
| 28°F hard freeze | Jan 1 · Feb 13 · Mar 9 | Nov 15 · Dec 6 · Jan 8 | 300 days |
Average high temperature by month
1991–2020 normals at Everett Snohomish Airport
Average low temperature by month
Months with lows near or below freezing carry frost risk
Where these frost dates come from
The frost dates for Mukilteo, WA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Everett Snohomish Airport (station USW00024222, elevation 606 ft), 1.1 mi from Mukilteo. Local conditions (valleys, hilltops, distance to water, city heat) can shift frost dates by days or weeks. The hardiness zone is from the 2023 USDA Plant Hardiness Zone Map (USDA ARS and Oregon State University PRISM). See our methodology.
Frost dates near Mukilteo
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Mill Creek, WA | 5.6 mi | Mar 9 | Nov 17 |
| Lynnwood, WA | 5.6 mi | Mar 9 | Nov 17 |
| Everett, WA | 6.2 mi | Mar 24 | Nov 2 |
| Edmonds, WA | 7.5 mi | Mar 9 | Nov 17 |
| Mountlake Terrace, WA | 8.1 mi | Mar 8 | Nov 23 |
| Brier, WA | 8.7 mi | Mar 8 | Nov 23 |
| Snohomish, WA | 9.9 mi | Mar 24 | Nov 2 |
| Bothell, WA | 11 mi | Mar 8 | Nov 23 |
| Lake Forest Park, WA | 11 mi | Mar 8 | Nov 23 |
| Shoreline, WA | 11 mi | Mar 8 | Nov 23 |
Frequently asked questions
When is the last frost in Mukilteo?
On average, the last spring frost (32°F) in Mukilteo is around March 9. In about 1 year in 10 it comes after March 29, and in 9 years in 10 it comes after February 15.
When is the first frost in Mukilteo?
The first fall frost (32°F) usually arrives around November 17. There’s a 10% chance of a freeze by October 31 and a 90% chance by December 7.
Can it frost in Mukilteo after the last frost date?
Yes. Frost can form on clear, calm nights even when the air stays above 32°F. Temperatures of 36°F or lower, cold enough for frost on exposed plants, have a 50% chance of occurring after April 3.
What growing zone is Mukilteo?
Mukilteo is in USDA Plant Hardiness Zone 8b (average annual extreme minimum temperature 15 to 20°F), based on the 2023 USDA map for ZIP code 98275. See growing zones in Washington.
More: all Washington frost dates · Washington growing zones · frost vs. freeze