Home › Colorado › Denver (Airport)

First and last freeze dates in Denver (Airport), CO

The first freeze of fall (a low of 32°F or colder) typically comes around Oct 6, and the last freeze of spring around May 11.

This fall so far (data through Oct 16, 2026): first freeze (32°F or colder) Oct 16 at this station. Observed data, can lag a day or two.

Oct 6Median first fall freeze (≤32°F)

May 11Median last spring freeze (≤32°F)

154Median freeze-free days between

First and last freeze dates in Denver (Airport)

Threshold	Event	Median date	Typical range (10th–90th pct)	Earliest / latest	Years with one
32°F or colder (freeze)	First in fall	Oct 6	Sep 20 – Oct 24	Sep 8 (2020) / Oct 28 (2015)	100%
32°F or colder (freeze)	Last in spring	May 11	Apr 26 – May 21	–	100%
28°F or colder (hard freeze)	First in fall	Oct 17	Oct 6 – Nov 3	Sep 21 (1995) / Nov 10 (2014)	100%
28°F or colder (hard freeze)	Last in spring	Apr 23	Apr 10 – May 9	–	100%

Based on the station’s daily minimum temperature, 1995–2024. “Freeze” here means a daily low at or below the threshold, which is not the same as visible frost. Your yard can differ by several degrees and days from an airport weather station, so use these as planning odds, not guarantees.

The median stretch between the last spring freeze and the first fall freeze (the freeze-free season) was about 154 days.

Nearby weather stations

Source station: Denver Intl Ap (USW00003017), elevation 5,404 ft. Data: NOAA NCEI GHCN-Daily. Computed by First Snow Dates; how we calculate this. Historical averages only; for a forecast see weather.gov.

Planning for winter? Heat pump vs gas furnace, propane and oil: heating cost in Colorado (on our sister site PlugVsPump, from EIA prices).