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🍂 First Frost Dates for Block Island, Rhode Island 02807

The first 36°F frost date is 30% likely to be on Oct 22. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Nov 4. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Block Island, RI 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% chanceOct 12
20% chanceOct 18
30% chanceOct 22
40% chanceOct 25
50% chanceOct 28
60% chanceOct 31
70% chanceNov 3
80% chanceNov 6
90% chanceNov 12
Probability of light freeze (32°F) on or before...
10% chanceOct 26
20% chanceNov 1
30% chanceNov 4
40% chanceNov 8
50% chanceNov 11
60% chanceNov 15
70% chanceNov 18
80% chanceNov 22
90% chanceNov 28
Probability of moderate freeze (28°F) on or before...
10% chanceNov 9
20% chanceNov 15
30% chanceNov 19
40% chanceNov 22
50% chanceNov 25
60% chanceNov 28
70% chanceDec 1
80% chanceDec 4
90% chanceDec 9
Probability of moderate hard freeze (24°F) on or before...
10% chanceNov 21
20% chanceNov 26
30% chanceNov 30
40% chanceDec 2
50% chanceDec 4
60% chanceDec 8
70% chanceDec 11
80% chanceDec 15
90% chanceDec 21
Probability of hard freeze (20°F) on or before...
10% chanceNov 30
20% chanceDec 3
30% chanceDec 7
40% chanceDec 11
50% chanceDec 14
60% chanceDec 18
70% chanceDec 22
80% chanceDec 27
90% chanceJan 2
Probability of severe hard freeze (16°F) on or before...
10% chanceDec 6
20% chanceDec 12
30% chanceDec 17
40% chanceDec 21
50% chanceDec 26
60% chanceDec 30
70% chanceJan 3
80% chanceJan 8
90% chanceJan 17

Agricultural climatic data from weather station: BLOCK ISLAND STATE AP (USW00094793)

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