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Will it freeze in Kennewick in the next 7 nights?
No overnight lows at or below 32°F are forecast in Kennewick during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 40°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 40°F Above 36°F · Partly Cloudy
- Fri, Nov 6 43°F Above 36°F · Mostly Cloudy
- Sat, Nov 7 46°F Above 36°F · Mostly Cloudy
- Sun, Nov 8 41°F Above 36°F · Mostly Cloudy
- Mon, Nov 9 42°F Above 36°F · Chance Rain Showers
- Tue, Nov 10 45°F Above 36°F · Chance Rain Showers
- Wed, Nov 11 46°F Above 36°F · 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 Kennewick
The median first fall hard-freeze date (28°F) is November 11, from NOAA’s 1991–2020 Climate Normals at Kennewick. 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 30 · Apr 14 · Apr 30 | Oct 7 · Oct 21 · Nov 2 | 189 days |
| 32°F freeze | Mar 9 · Mar 28 · Apr 10 | Oct 18 · Oct 30 · Nov 15 | 216 days |
| 28°F hard freeze | Feb 20 · Mar 8 · Mar 29 | Oct 27 · Nov 11 · Dec 1 | 246 days |
Average high temperature by month
1991–2020 normals at Kennewick
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 Kennewick, WA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Kennewick (station USC00454154, elevation 390 ft), 3.7 mi from Kennewick. 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 Kennewick
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Pasco, WA | 5.6 mi | Apr 27 | Oct 11 |
| Richland, WA | 8.1 mi | Apr 6 | Oct 24 |
| West Richland, WA | 13 mi | Apr 6 | Oct 24 |
| Umatilla, OR | 21 mi | Mar 30 | Nov 4 |
| Hermiston, OR | 25 mi | Apr 26 | Oct 10 |
| Prosser, WA | 29 mi | Apr 14 | Oct 22 |
| Grandview, WA | 35 mi | May 1 | Oct 6 |
| Connell, WA | 36 mi | Apr 30 | Oct 12 |
| College Place, WA | 39 mi | May 2 | Oct 1 |
| Pendleton, OR | 40 mi | Apr 22 | Oct 9 |
Frequently asked questions
When is the last frost in Kennewick?
On average, the last spring frost (32°F) in Kennewick is around March 28. In about 1 year in 10 it comes after April 10, and in 9 years in 10 it comes after March 9.
When is the first frost in Kennewick?
The first fall frost (32°F) usually arrives around October 30. There’s a 10% chance of a freeze by October 18 and a 90% chance by November 15.
Can it frost in Kennewick 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 14.
What growing zone is Kennewick?
Kennewick is in USDA Plant Hardiness Zone 7b (average annual extreme minimum temperature 5 to 10°F), based on the 2023 USDA map for ZIP code 99336. See growing zones in Washington.
More: all Washington frost dates · Washington growing zones · UV index today in Kennewick · frost vs. freeze