Frost dates 2026–2027

Frost dates for Centennial, Colorado

Median (50% chance) dates of the last and first 32°F frost, from NOAA 1991–2020 climate normals at Denver Centennial Airport, 1.6 mi away (close match).

Last spring frostMay 5
First fall frostOct 8
154 frost-free days
Last spring frostMay 51 year in 10 after May 17
First fall frostOct 81 year in 10 by Sep 25
Growing season154 daysbetween median 32°F dates
Hardiness zoneZone 6a−10 to −5°F average extreme low

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Will it freeze in Centennial in the next 7 nights?

No overnight lows at or below 32°F are forecast in Centennial during the next 7 nights in the available NWS frost forecast.

Tonight: forecast low 36°F. Frost possible.

NWS forecast period: Thu, Nov 5, 6:00 PM MST to Fri, Nov 6, 6:00 AM MST.

3 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.

Overnight lows from the National Weather Service forecast for this location. This covers the available forecast window, not the first freeze of the whole season. Frost can form above 32°F on clear, calm nights.

Frost and freeze probabilities

Freeze dates shift from year to year. Spring percentages describe the chance of a freeze after the stated date; fall percentages describe the chance of a freeze by that date. The 10% spring date is the cautious one: a later freeze happens about 1 year in 10.

These dates describe historical probabilities, not this year’s forecast or the earliest and latest possible freezes. Different weather stations or probability thresholds can produce different published dates for the same city.

Average first hard freeze in Centennial

The median first fall hard-freeze date (28°F) is October 17, from NOAA’s 1991–2020 Climate Normals at Denver Centennial Airport. This is the 50% probability date, not a forecast for this year.

TemperatureLast spring date
90% · 50% · 10% chance of a later freeze
First fall date
10% · 50% · 90% chance of an earlier freeze
Season
36°F frost possible May 3 · May 15 · May 30 Sep 17 · Oct 1 · Oct 12 136 days
32°F freeze Apr 24 · May 5 · May 17 Sep 25 · Oct 8 · Oct 20 154 days
28°F hard freeze Apr 10 · Apr 25 · May 9 Oct 4 · Oct 17 · Oct 28 172 days
NOAA NCEI U.S. Climate Normals 1991–2020, station USW00093067. How to read these probabilities.

Average high temperature by month

1991–2020 normals at Denver Centennial Airport

Average low temperature by month

Months with lows near or below freezing carry frost risk

Where these frost dates come from

The frost dates for Centennial, CO come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Denver Centennial Airport (station USW00093067, elevation 5,883 ft), 1.6 mi from Centennial. Local conditions (valleys, hilltops, distance to water, city heat) can shift frost dates by days or weeks. The hardiness zone is from the 2023 USDA Plant Hardiness Zone Map (USDA ARS and Oregon State University PRISM). See our methodology.

Frost dates near Centennial

CityDistanceLast spring frostFirst fall frost
Greenwood Village, CO 3.1 mi May 7 Oct 8
Lone Tree, CO 4.3 mi May 5 Oct 8
Cherry Hills Village, CO 5.6 mi May 7 Oct 8
Parker, CO 7.5 mi May 9 Oct 3
Englewood, CO 8.1 mi May 2 Oct 11
Littleton, CO 8.1 mi May 2 Oct 11
Castle Pines, CO 8.7 mi May 9 Oct 2
Sheridan, CO 9.3 mi May 2 Oct 11
Aurora, CO 11 mi May 7 Oct 8
Denver, CO 12 mi May 4 Oct 8

Frequently asked questions

When is the last frost in Centennial?

On average, the last spring frost (32°F) in Centennial is around May 5. In about 1 year in 10 it comes after May 17, and in 9 years in 10 it comes after April 24.

When is the first frost in Centennial?

The first fall frost (32°F) usually arrives around October 8. There’s a 10% chance of a freeze by September 25 and a 90% chance by October 20.

Can it frost in Centennial after the last frost date?

Yes. Frost can form on clear, calm nights even when the air stays above 32°F. Temperatures of 36°F or lower, cold enough for frost on exposed plants, have a 50% chance of occurring after May 15.

What growing zone is Centennial?

Centennial is in USDA Plant Hardiness Zone 6a (average annual extreme minimum temperature −10 to −5°F), based on the 2023 USDA map for ZIP code 80112. See growing zones in Colorado.

More: all Colorado frost dates · Colorado growing zones · UV index today in Centennial · frost vs. freeze