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Will it freeze in Sultan in the next 7 nights?
No overnight lows at or below 32°F are forecast in Sultan during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 44°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 44°F Above 36°F · Mostly Cloudy then Light Rain Likely
- Fri, Nov 6 49°F Above 36°F · Light Rain
- Sat, Nov 7 46°F Above 36°F · Rain
- Sun, Nov 8 41°F Above 36°F · Slight Chance Light Rain then Mostly Cloudy
- Mon, Nov 9 46°F Above 36°F · Light Rain
- Tue, Nov 10 49°F Above 36°F · Light Rain Likely
- Wed, Nov 11 46°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 Sultan
The median first fall hard-freeze date (28°F) is November 12, from NOAA’s 1991–2020 Climate Normals at Startup 1 E. 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 | Apr 20 · May 8 · May 24 | Sep 22 · Oct 7 · Oct 25 | 154 days |
| 32°F freeze | Mar 25 · Apr 15 · May 7 | Oct 5 · Oct 25 · Nov 15 | 192 days |
| 28°F hard freeze | Feb 22 · Mar 18 · Apr 11 | Oct 23 · Nov 12 · Dec 12 | 240 days |
Average high temperature by month
1991–2020 normals at Startup 1 E
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 Sultan, WA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Startup 1 E (station USC00458034, elevation 170 ft), 4.0 mi from Sultan. 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 Sultan
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Monroe, WA | 8.1 mi | Apr 17 | Oct 23 |
| Duvall, WA | 12 mi | Apr 17 | Oct 23 |
| Snohomish, WA | 14 mi | Mar 24 | Nov 2 |
| Lake Stevens, WA | 16 mi | Mar 24 | Nov 2 |
| Woodinville, WA | 18 mi | Mar 8 | Nov 23 |
| Mill Creek, WA | 19 mi | Mar 9 | Nov 17 |
| Everett, WA | 19 mi | Mar 24 | Nov 2 |
| Redmond, WA | 20 mi | Mar 8 | Nov 23 |
| Bothell, WA | 20 mi | Mar 8 | Nov 23 |
| Marysville, WA | 22 mi | Mar 24 | Nov 2 |
Frequently asked questions
When is the last frost in Sultan?
On average, the last spring frost (32°F) in Sultan is around April 15. In about 1 year in 10 it comes after May 7, and in 9 years in 10 it comes after March 25.
When is the first frost in Sultan?
The first fall frost (32°F) usually arrives around October 25. There’s a 10% chance of a freeze by October 5 and a 90% chance by November 15.
Can it frost in Sultan 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 May 8.
What growing zone is Sultan?
Sultan 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 98294. See growing zones in Washington.
More: all Washington frost dates · Washington growing zones · frost vs. freeze