When is the last frost in Camp Sherman, OR?

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

When is the first frost in Camp Sherman, 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 97730Camp Sherman, OR

Frost is possible in any month near Camp Sherman, based on NOAA 1991-2020 records for the Sisters, 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)	—	—	57 days	100%
Hard freeze (28°F)	May 17 · Jun 8 · Jul 3	Aug 25 · Sep 13 · Oct 1	97 days	100%

Where these dates come from

ZIP code 97730 is matched to the NOAA station Sisters, OR, 20.9 km away, at 3,180 ft elevation (218 ft higher than the ZIP code's center). Nearby stations for comparison:

Station	Elevation	Avg last frost	Avg first frost
Sisters, OR (used)	3,180 ft	—	—
Santiam Junction, OR	3,750 ft	—	—
Marion Forks Fish Hatchery, OR	2,475 ft	May 15	Sep 30
Belknap Springs 8 N, OR	2,152 ft	May 5	Oct 12

Frost dates near Camp Sherman

Sisters, OR 97759 · last —, first —
Culver, OR 97734 · last Jun 9, first Sep 14
Terrebonne, OR 97760 · last Jun 9, first Sep 14
Redmond, OR 97756 · last Jun 9, first Sep 14
Warm Springs, OR 97761 · last May 5, first Oct 7
Idanha, OR 97350 · last Mar 9, first Dec 3
Madras, OR 97741 · last —, first —
Bend, OR 97703 · last Jun 6, first Sep 20

Frequently asked questions

When is the last frost in Camp Sherman, OR?: Frost is possible in any month at the nearest NOAA station (Sisters, OR), so there is no reliable average last frost date.
When is the first frost in Camp Sherman, 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.