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Will it freeze in Ketchikan in the next 7 nights?
No overnight lows at or below 32°F are forecast in Ketchikan 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 AKST to Fri, Nov 6, 6:00 AM AKST.
No nights at or below 36°F in the National Weather Service forecast for the next 7 nights.
- Tonight 44°F Above 36°F · Rain
- Fri, Nov 6 42°F Above 36°F · Light Rain Likely
- Sat, Nov 7 41°F Above 36°F · Heavy Rain
- Sun, Nov 8 42°F Above 36°F · Rain
- Mon, Nov 9 43°F Above 36°F · Rain
- Tue, Nov 10 43°F Above 36°F · Rain
- Wed, Nov 11 42°F Above 36°F · 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 Ketchikan
The median first fall hard-freeze date (28°F) is November 26, from NOAA’s 1991–2020 Climate Normals at Beaver Falls. 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 8 · Apr 27 · May 14 | Oct 5 · Oct 22 · Nov 8 | 178 days |
| 32°F freeze | Mar 15 · Apr 4 · Apr 25 | Oct 19 · Nov 9 · Dec 2 | 218 days |
| 28°F hard freeze | Feb 15 · Mar 13 · Apr 5 | Nov 4 · Nov 26 · Dec 22 | 259 days |
Average high temperature by month
1991–2020 normals at Beaver Falls
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 Ketchikan, AK come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Beaver Falls (station USC00500657, elevation 35 ft), 0.9 mi from Ketchikan. 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 Ketchikan
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Juneau, AK | 229 mi | May 3 | Oct 14 |
Frequently asked questions
When is the last frost in Ketchikan?
On average, the last spring frost (32°F) in Ketchikan is around April 4. In about 1 year in 10 it comes after April 25, and in 9 years in 10 it comes after March 15.
When is the first frost in Ketchikan?
The first fall frost (32°F) usually arrives around November 9. There’s a 10% chance of a freeze by October 19 and a 90% chance by December 2.
Can it frost in Ketchikan 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 27.
What growing zone is Ketchikan?
Ketchikan is in USDA Plant Hardiness Zone 8a (average annual extreme minimum temperature 10 to 15°F), based on the 2023 USDA map for ZIP code 99926. See growing zones in Alaska.
More: all Alaska frost dates · Alaska growing zones · frost vs. freeze