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Will it freeze in Moses Lake in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Sun, Nov 8: 32°F (Sun, Nov 8, 6:00 PM PST to Mon, Nov 9, 6:00 AM PST).
Tonight: forecast low 36°F. Frost possible.
NWS forecast period: Thu, Nov 5, 6:00 PM PST to Fri, Nov 6, 6:00 AM PST.
4 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 36°F Frost possible · Patchy Fog
- Fri, Nov 6 34°F Frost possible · Slight Chance Light Rain then Patchy Fog
- Sat, Nov 7 37°F Above 36°F · Mostly Cloudy
- Sun, Nov 8 32°F Freeze · Mostly Cloudy
- Mon, Nov 9 34°F Frost possible · Chance Light Rain
- Tue, Nov 10 38°F Above 36°F · Chance Light Rain
- Wed, Nov 11 38°F Above 36°F · Slight Chance Light Rain then Mostly Cloudy
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 Moses Lake
The median first fall hard-freeze date (28°F) is October 20, from NOAA’s 1991–2020 Climate Normals at Moses Lake Grant County 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 | Apr 27 · May 9 · May 23 | Sep 17 · Sep 29 · Oct 10 | 141 days |
| 32°F freeze | Apr 10 · Apr 27 · May 11 | Sep 29 · Oct 8 · Oct 23 | 165 days |
| 28°F hard freeze | Mar 21 · Apr 10 · Apr 30 | Oct 5 · Oct 20 · Nov 5 | 191 days |
Average high temperature by month
1991–2020 normals at Moses Lake Grant County 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 Moses Lake, WA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Moses Lake Grant County Airport (station USW00024110, elevation 1,196 ft), 5.9 mi from Moses Lake. 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 Moses Lake
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Ephrata, WA | 17 mi | Apr 22 | Oct 17 |
| Othello, WA | 22 mi | Apr 30 | Oct 12 |
| Quincy, WA | 28 mi | Apr 21 | Oct 16 |
| Connell, WA | 39 mi | Apr 30 | Oct 12 |
| East Wenatchee, WA | 52 mi | Apr 4 | Oct 28 |
| Wenatchee, WA | 53 mi | Apr 4 | Oct 28 |
| West Richland, WA | 57 mi | Apr 6 | Oct 24 |
| Richland, WA | 58 mi | Apr 6 | Oct 24 |
| Pasco, WA | 60 mi | Apr 27 | Oct 11 |
| Ellensburg, WA | 60 mi | May 8 | Oct 2 |
Frequently asked questions
When is the last frost in Moses Lake?
On average, the last spring frost (32°F) in Moses Lake is around April 27. In about 1 year in 10 it comes after May 11, and in 9 years in 10 it comes after April 10.
When is the first frost in Moses Lake?
The first fall frost (32°F) usually arrives around October 8. There’s a 10% chance of a freeze by September 29 and a 90% chance by October 23.
Can it frost in Moses Lake 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 9.
What growing zone is Moses Lake?
Moses Lake is in USDA Plant Hardiness Zone 7a (average annual extreme minimum temperature 0 to 5°F), based on the 2023 USDA map for ZIP code 98837. See growing zones in Washington.
More: all Washington frost dates · Washington growing zones · UV index today in Moses Lake · frost vs. freeze