🌷 Your Ultimate Garden Calendar!

🍂 First Frost Dates for Fort Peck, Montana 59223

The first 36°F frost date is 30% likely to be on Sep 13. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Sep 22. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Fort Peck, MT 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 5
20% chanceSep 10
30% chanceSep 13
40% chanceSep 16
50% chanceSep 19
60% chanceSep 21
70% chanceSep 24
80% chanceSep 27
90% chanceOct 1
Probability of light freeze (32°F) on or before...
10% chanceSep 14
20% chanceSep 19
30% chanceSep 22
40% chanceSep 25
50% chanceSep 28
60% chanceOct 1
70% chanceOct 3
80% chanceOct 6
90% chanceOct 11
Probability of moderate freeze (28°F) on or before...
10% chanceSep 21
20% chanceSep 26
30% chanceSep 30
40% chanceOct 3
50% chanceOct 7
60% chanceOct 10
70% chanceOct 13
80% chanceOct 17
90% chanceOct 22
Probability of moderate hard freeze (24°F) on or before...
10% chanceSep 28
20% chanceOct 5
30% chanceOct 10
40% chanceOct 14
50% chanceOct 18
60% chanceOct 22
70% chanceOct 25
80% chanceOct 28
90% chanceNov 1
Probability of hard freeze (20°F) on or before...
10% chanceOct 6
20% chanceOct 15
30% chanceOct 21
40% chanceOct 25
50% chanceOct 28
60% chanceOct 31
70% chanceNov 2
80% chanceNov 6
90% chanceNov 12
Probability of severe hard freeze (16°F) on or before...
10% chanceOct 16
20% chanceOct 24
30% chanceOct 29
40% chanceNov 1
50% chanceNov 4
60% chanceNov 8
70% chanceNov 12
80% chanceNov 16
90% chanceNov 22

Agricultural climatic data from weather station: FT PECK PWR PLT (USC00243176)

Back to Weather Calendar