When is the last frost in Fort Klamath, OR?

Frost is possible in any month at the nearest NOAA station (Chiloquin 12 Nw (Fort Klamath), OR), so there is no reliable average last frost date.

When is the first frost in Fort Klamath, OR?

Frost is possible in any month at the nearest NOAA station.

Are these frost dates a forecast?

No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.

Frost dates for 97626Fort Klamath, OR

Frost is possible in any month near Fort Klamath, based on NOAA 1991-2020 records for the Chiloquin 12 Nw (Fort Klamath), OR station.

Frost is possible in any month. Even summer nights can drop to freezing at this station, so protect tender plants whenever cold nights are forecast.

Frost risk by date

NOAA reports frost dates as probabilities. The middle date is the average (a 50% chance). For spring, the 10% date is a safer planting date: frost after it happens in about 1 year in 10. Light frost (36°F) can damage tender plants; a hard freeze (28°F) kills most annuals.

Spring dates: chance of a frost AFTER the date. Fall dates: chance of a frost BEFORE the date.
Temperature	Last spring: 90% / 50% / 10% chance	First fall: 10% / 50% / 90% chance	Growing season (50%)	Years with at least one
Light frost (36°F)	—	—	28 days	100%
Frost / freeze (32°F)	—	—	59 days	100%
Hard freeze (28°F)	May 18 · Jun 10 · Jun 28	Aug 27 · Sep 13 · Sep 30	93 days	100%

Where these dates come from

ZIP code 97626 is matched to the NOAA station Chiloquin 12 Nw (Fort Klamath), OR, 7.7 km away, at 4,180 ft elevation (33 ft higher than the ZIP code's center). Nearby stations for comparison:

Station	Elevation	Avg last frost	Avg first frost
Chiloquin 12 Nw (Fort Klamath), OR (used)	4,180 ft	—	—
Crater Lake Nps Hq, OR	6,485 ft	—	—
Prospect 2 Sw, OR	2,482 ft	May 19	Oct 3
Lost Creek Dam, OR	1,580 ft	Apr 29	Oct 17

Frost dates near Fort Klamath

Chiloquin, OR 97624 · last —, first —
Crater Lake, OR 97604 · last —, first —
Prospect, OR 97536 · last May 19, first Oct 3
Klamath Falls, OR 97601 · last Jun 9, first Sep 18
Butte Falls, OR 97522 · last May 19, first Oct 3
Sprague River, OR 97639 · last Jun 9, first Sep 18
Keno, OR 97627 · last Jun 9, first Sep 18
Chemult, OR 97731 · last —, first —

Frequently asked questions

When is the last frost in Fort Klamath, OR?: Frost is possible in any month at the nearest NOAA station (Chiloquin 12 Nw (Fort Klamath), OR), so there is no reliable average last frost date.
When is the first frost in Fort Klamath, OR?: Frost is possible in any month at the nearest NOAA station.
Are these frost dates a forecast?: No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.