Checking current alerts… View NWS forecast and alerts.
Will it freeze in Maple Valley in the next 7 nights?
No overnight lows at or below 32°F are forecast in Maple Valley during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 42°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 42°F Above 36°F · Mostly Cloudy then Chance Light Rain
- Fri, Nov 6 47°F Above 36°F · Light Rain
- Sat, Nov 7 46°F Above 36°F · Light Rain
- Sun, Nov 8 39°F Above 36°F · Mostly Cloudy
- Mon, Nov 9 45°F Above 36°F · Light Rain Likely
- Tue, Nov 10 48°F Above 36°F · Light Rain Likely
- Wed, Nov 11 45°F Above 36°F · Chance Light Rain
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 Maple Valley
The median first fall hard-freeze date (28°F) is November 12, from NOAA’s 1991–2020 Climate Normals at Landsburg. 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 23 · May 10 · Jun 7 | Sep 19 · Oct 6 · Oct 26 | 146 days |
| 32°F freeze | Mar 31 · Apr 20 · May 10 | Oct 5 · Oct 25 · Nov 12 | 187 days |
| 28°F hard freeze | Feb 28 · Mar 24 · Apr 16 | Oct 24 · Nov 12 · Dec 8 | 233 days |
Average high temperature by month
1991–2020 normals at Landsburg
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 Maple Valley, WA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Landsburg (station USC00454486, elevation 535 ft), 3.5 mi from Maple Valley. 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 Maple Valley
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Covington, WA | 3.1 mi | Apr 20 | Oct 25 |
| Black Diamond, WA | 3.7 mi | Apr 20 | Oct 25 |
| Kent, WA | 8.7 mi | Mar 20 | Nov 10 |
| Auburn, WA | 9.3 mi | Mar 20 | Nov 10 |
| Renton, WA | 11 mi | Mar 13 | Nov 16 |
| Enumclaw, WA | 12 mi | Apr 7 | Oct 30 |
| Issaquah, WA | 12 mi | Mar 13 | Nov 16 |
| Pacific, WA | 12 mi | Mar 8 | Nov 14 |
| Newcastle, WA | 13 mi | Mar 13 | Nov 16 |
| Bonney Lake, WA | 13 mi | Apr 11 | Oct 30 |
Frequently asked questions
When is the last frost in Maple Valley?
On average, the last spring frost (32°F) in Maple Valley is around April 20. In about 1 year in 10 it comes after May 10, and in 9 years in 10 it comes after March 31.
When is the first frost in Maple Valley?
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 12.
Can it frost in Maple Valley 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 10.
What growing zone is Maple Valley?
Maple Valley 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 98042. See growing zones in Washington.
More: all Washington frost dates · Washington growing zones · UV index today in Maple Valley · frost vs. freeze