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🍂 First Frost Dates for Pasco, Washington 99301

The first 36°F frost date is 30% likely to be on Oct 2. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Oct 12. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Pasco, WA are based on historical climate data.

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

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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 sweater—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 (36°F) on or before...
10% chanceSep 26
20% chanceSep 30
30% chanceOct 2
40% chanceOct 5
50% chanceOct 8
60% chanceOct 11
70% chanceOct 14
80% chanceOct 18
90% chanceOct 22
Probability of light freeze (32°F) on or before...
10% chanceOct 3
20% chanceOct 8
30% chanceOct 12
40% chanceOct 16
50% chanceOct 19
60% chanceOct 22
70% chanceOct 25
80% chanceOct 29
90% chanceNov 4
Probability of moderate freeze (28°F) on or before...
10% chanceOct 14
20% chanceOct 21
30% chanceOct 25
40% chanceOct 28
50% chanceNov 1
60% chanceNov 5
70% chanceNov 10
80% chanceNov 16
90% chanceNov 25
Probability of moderate hard freeze (24°F) on or before...
10% chanceOct 27
20% chanceNov 1
30% chanceNov 8
40% chanceNov 14
50% chanceNov 21
60% chanceNov 26
70% chanceDec 1
80% chanceDec 6
90% chanceDec 14
Probability of hard freeze (20°F) on or before...
10% chanceNov 9
20% chanceNov 18
30% chanceNov 27
40% chanceDec 2
50% chanceDec 6
60% chanceDec 11
70% chanceDec 18
80% chanceDec 25
90% chanceJan 4
Probability of severe hard freeze (16°F) on or before...
10% chanceNov 22
20% chanceDec 2
30% chanceDec 7
40% chanceDec 13
50% chanceDec 19
60% chanceDec 27
70% chanceJan 1
80% chanceJan 10
90% chanceJan 26

Agricultural climatic data from weather station: ICE HARBOR DAM (USC00453883)

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