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Will it freeze in Kenai in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Tonight: 26°F (Thu, Nov 5, 6:00 PM AKST to Fri, Nov 6, 6:00 AM AKST).
Tonight: forecast low 26°F. Hard freeze.
NWS forecast period: Thu, Nov 5, 6:00 PM AKST to Fri, Nov 6, 6:00 AM AKST.
7 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 26°F Hard freeze · Patchy Freezing Fog
- Fri, Nov 6 27°F Hard freeze · Mostly Cloudy
- Sat, Nov 7 23°F Hard freeze · Partly Cloudy
- Sun, Nov 8 24°F Hard freeze · Mostly Cloudy
- Mon, Nov 9 25°F Hard freeze · Slight Chance Light Snow
- Tue, Nov 10 24°F Hard freeze · Mostly Cloudy
- Wed, Nov 11 24°F Hard freeze · 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 Kenai
The median first fall hard-freeze date (28°F) is September 25, from NOAA’s 1991–2020 Climate Normals at Kenai Municipal 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 | rare in most years | rare in most years | 74 days |
| 32°F freeze | May 8 · May 24 · Jun 4 | Aug 29 · Sep 12 · Sep 27 | 110 days |
| 28°F hard freeze | Apr 22 · May 5 · May 18 | Sep 7 · Sep 25 · Oct 10 | 142 days |
Average high temperature by month
1991–2020 normals at Kenai Municipal 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 Kenai, AK come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Kenai Municipal Airport (station USW00026523, elevation 91 ft), 1.6 mi from Kenai. 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 Kenai
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Homer, AK | 65 mi | May 10 | Sep 29 |
| Anchorage, AK | 77 mi | May 16 | Sep 20 |
| Wasilla, AK | 91 mi | May 16 | Sep 23 |
| Palmer, AK | 100 mi | May 6 | Sep 25 |
| Kodiak, AK | 196 mi | Apr 29 | Oct 14 |
Frequently asked questions
When is the last frost in Kenai?
On average, the last spring frost (32°F) in Kenai is around May 24. In about 1 year in 10 it comes after June 4, and in 9 years in 10 it comes after May 8.
When is the first frost in Kenai?
The first fall frost (32°F) usually arrives around September 12. There’s a 10% chance of a freeze by August 29 and a 90% chance by September 27.
What growing zone is Kenai?
Kenai is in USDA Plant Hardiness Zone 4b (average annual extreme minimum temperature −25 to −20°F), based on the 2023 USDA map for ZIP code 99672. See growing zones in Alaska.
More: all Alaska frost dates · Alaska growing zones · frost vs. freeze