Frost Date Countdown

Enter your local frost dates and see at a glance how many days you have until it's safe to plant — or time to protect your garden.

📖 How it works & FAQ

Last spring frost date The average final frost of spring in your area.

First fall frost date The average first frost of autumn in your area.

—until last spring frostenter a date

—until first fall frostenter a date

—frost-free growing daysneeds both dates

Enter your frost dates to see whether it's safe to plant.

Frost dates are averages and vary by year and microclimate — treat this as a planning estimate, not a guarantee.

Know exactly when it's safe to plant

Every garden lives inside two invisible fences: the last hard frost of spring and the first frost of fall. The stretch between them is your frost-free growing season — the window when tender plants like tomatoes, peppers, cucumbers and basil can go outside without being killed overnight. This Frost Date Countdown turns those two dates into a plain, running count of days so you always know where you stand.

Where to find your frost dates

Frost dates are local. A gardener a few miles up a hill can see frost two weeks later than a neighbor in a sheltered valley. Look up your area's average last spring frost and first fall frost from a regional extension office, an almanac, or a frost-date lookup for your ZIP or postal code. Those averages are usually given as a 50% probability date, meaning frost is equally likely before or after — so cautious gardeners wait a week or two past the spring date before setting out their most delicate seedlings.

How to use it

Enter your last spring frost date for your location.
Enter your first fall frost date.
Read the live countdown cards — days to each frost and total frost-free days.
Check the message for a quick safe-to-plant or take-cover verdict.

Everything updates instantly and runs entirely in your browser — nothing is uploaded. These figures are planning estimates, not professional agronomic advice.

FAQ

What counts as a frost date?: It's the date when temperatures are expected to dip to freezing (32°F / 0°C). The spring date is the last expected frost; the fall date is the first.
Why wait past the last spring frost?: Average dates are 50/50 odds, so frost can still arrive later. Waiting one to two weeks — or until the soil warms — protects heat-loving crops.
Are these dates guaranteed?: No. Frost dates are long-term averages and shift with weather, elevation and microclimate. Treat the countdown as a planning estimate, not a promise.
Is my data private?: Yes. The dates you enter never leave your device — all math happens locally in your browser.