๐Ÿ‚ First Frost Dates for Winchester, Oregon 97495

The first 36ยฐF frost date is 30% likely to be on Oct 14. (See detailed probabilities below.)

The first 32ยฐF light freeze date is 30% likely to be on Nov 1. (See detailed probabilities below.)

(See also ๐ŸŒท Last Spring Frost Dates.)

First frost date probabilities for Winchester, OR are based on historical climate data.

Always check your local forecast for the most up-to-date frost warnings.

What is a First Frost Date?

The first fall frost signals the end of your local growing season. This date serves as an important deadline for gardeners and farmers. You'll need to complete harvesting before this point. Annuals and other tender plants will die back when frost hits, and perennial plants will enter their dormant phase for winter. Meanwhile, it's time to enjoy a cup of hot cocoa and a cozy sweaterโ€”and start planning your spring garden!

How to use the First Frost Date?

Watch your local weather forecasts in early fall to predict the first frost date. Harvest tender crops and protect vulnerable plants before frost arrives. For late-summer plantings, count backward from your area's average first frost date. This ensures your crops have enough time to mature. Keep track of when frost actually occurs in your garden each year. This helps you identify protected spots where the growing season might last longer.

First Frost Date Probabilities

Probability of frost (36ยฐF) on or before...
10% chanceOct 3
20% chanceOct 9
30% chanceOct 14
40% chanceOct 18
50% chanceOct 22
60% chanceOct 25
70% chanceOct 29
80% chanceNov 3
90% chanceNov 12
Probability of light freeze (32ยฐF) on or before...
10% chanceOct 20
20% chanceOct 27
30% chanceNov 1
40% chanceNov 7
50% chanceNov 13
60% chanceNov 21
70% chanceNov 29
80% chanceDec 5
90% chanceDec 15
Probability of moderate freeze (28ยฐF) on or before...
10% chanceNov 3
20% chanceNov 16
30% chanceNov 30
40% chanceDec 7
50% chanceDec 14
60% chanceDec 22
70% chanceDec 30
80% chanceJan 9
90% chanceJan 27
Probability of moderate hard freeze (24ยฐF) on or before...
10% chanceNov 24
20% chanceDec 10
30% chanceDec 19
40% chanceDec 28
50% chanceJan 1
60% chanceJan 12
70% chanceJan 23
80% chanceFeb 1
90% chanceFeb 10
Probability of hard freeze (20ยฐF) on or before...
10% chanceDec 10
20% chanceDec 15
30% chanceDec 21
40% chanceDec 27
50% chanceJan 1
60% chanceJan 17
70% chanceJan 29
80% chanceFeb 3
90% chanceFeb 10
Probability of severe hard freeze (16ยฐF) on or before...
10% chancerarely
20% chancerarely
30% chancerarely
40% chancerarely
50% chancerarely
60% chancerarely
70% chancerarely
80% chancerarely
90% chancerarely

Agricultural climatic data from weather station: WINCHESTER (USC00359461)