🌷 Your Ultimate Garden Calendar!

🍂 First Frost Dates for Blue River, Oregon 97413

The first 36°F frost date is 30% likely to be on Sep 19. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Oct 5. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

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

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

Book Recommendations (ads!)

📚 Growing Under Cover: Techniques for a More Productive, Weather-Resistant, Pest-Free Vegetable Garden

📚 Greenhouse Gardening for Beginners: Step By Step Guide To Build A Year-Round Greenhouse And Grow Herbs, Organic Fruits And Vegetables, Plants, Flowers Plans & Ideas for Extending the Growing Season

📚 How to Garden Indoors & Grow Your Own Food Year Round: Ultimate Guide to Vertical, Container, and Hydroponic Gardening (Creative Homeowner) Vegetables, Herbs, DIY Projects, Composting, Lights, & More

📚 The Year-Round Vegetable Gardener: How to Grow Your Own Food 365 Days a Year, No Matter Where You Live

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 8
20% chanceSep 14
30% chanceSep 19
40% chanceSep 23
50% chanceSep 26
60% chanceSep 29
70% chanceOct 2
80% chanceOct 6
90% chanceOct 12
Probability of light freeze (32°F) on or before...
10% chanceSep 26
20% chanceOct 1
30% chanceOct 5
40% chanceOct 10
50% chanceOct 14
60% chanceOct 18
70% chanceOct 22
80% chanceOct 26
90% chanceNov 2
Probability of moderate freeze (28°F) on or before...
10% chanceOct 14
20% chanceOct 23
30% chanceOct 29
40% chanceNov 1
50% chanceNov 6
60% chanceNov 11
70% chanceNov 17
80% chanceNov 24
90% chanceDec 2
Probability of moderate hard freeze (24°F) on or before...
10% chanceNov 5
20% chanceNov 13
30% chanceNov 19
40% chanceNov 27
50% chanceDec 1
60% chanceDec 6
70% chanceDec 11
80% chanceDec 17
90% chanceDec 27
Probability of hard freeze (20°F) on or before...
10% chanceNov 20
20% chanceDec 1
30% chanceDec 6
40% chanceDec 12
50% chanceDec 20
60% chanceDec 26
70% chanceJan 1
80% chanceJan 11
90% chanceJan 28
Probability of severe hard freeze (16°F) on or before...
10% chanceDec 1
20% chanceDec 8
30% chanceDec 16
40% chanceDec 25
50% chanceDec 31
60% chanceJan 6
70% chanceJan 17
80% chanceJan 27
90% chanceFeb 6

Agricultural climatic data from weather station: BELKNAP SPRINGS 8 N (USC00350652)

Back to Weather Calendar