Frost dates 2026–2027

Frost dates for Prosper, Texas

Median (50% chance) dates of the last and first 32°F frost, from NOAA 1991–2020 climate normals at Mckinney Municipal Airport, 13 mi away (close match).

Last spring frostMar 17
First fall frostNov 15
241 frost-free days
Last spring frostMar 171 year in 10 after Apr 5
First fall frostNov 151 year in 10 by Oct 27
Growing season241 daysbetween median 32°F dates
Hardiness zoneZone 8b15 to 20°F average extreme low

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Will it freeze in Prosper in the next 7 nights?

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

Tonight: forecast low 53°F. Above 36°F.

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

No nights at or below 36°F in the National Weather Service forecast for the next 7 nights.

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 Prosper

The median first fall hard-freeze date (28°F) is November 30, from NOAA’s 1991–2020 Climate Normals at Mckinney Municipal 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 Mar 9 · Mar 31 · Apr 19 Oct 20 · Nov 3 · Nov 24 217 days
32°F freeze Feb 27 · Mar 17 · Apr 5 Oct 27 · Nov 15 · Dec 5 241 days
28°F hard freeze Feb 15 · Mar 4 · Mar 24 Nov 6 · Nov 30 · Dec 23 266 days
NOAA NCEI U.S. Climate Normals 1991–2020, station USC00415766. How to read these probabilities.

Average high temperature by month

1991–2020 normals at Mckinney Municipal 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 Prosper, TX come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Mckinney Municipal Airport (station USC00415766, elevation 586 ft), 13 mi from Prosper. 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 Prosper

CityDistanceLast spring frostFirst fall frost
Celina, TX 5.6 mi Mar 24 Nov 16
Frisco, TX 6.2 mi Mar 7 Nov 21
Little Elm, TX 7.5 mi Mar 13 Nov 20
Providence Village, TX 8.7 mi Mar 13 Nov 20
McKinney, TX 8.7 mi Mar 17 Nov 15
Aubrey, TX 11 mi Mar 24 Nov 16
Oak Point, TX 11 mi Mar 13 Nov 20
The Colony, TX 12 mi Mar 7 Nov 21
Allen, TX 12 mi Mar 18 Nov 11
Fairview, TX 13 mi Mar 18 Nov 11

Frequently asked questions

When is the last frost in Prosper?

On average, the last spring frost (32°F) in Prosper is around March 17. In about 1 year in 10 it comes after April 5, and in 9 years in 10 it comes after February 27.

When is the first frost in Prosper?

The first fall frost (32°F) usually arrives around November 15. There’s a 10% chance of a freeze by October 27 and a 90% chance by December 5.

Can it frost in Prosper 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 March 31.

What growing zone is Prosper?

Prosper is in USDA Plant Hardiness Zone 8b (average annual extreme minimum temperature 15 to 20°F), based on the 2023 USDA map for ZIP code 75078. See growing zones in Texas.

More: all Texas frost dates · Texas growing zones · UV index today in Prosper · frost vs. freeze