Frost dates 2026–2027

Frost dates for Henryetta, Oklahoma

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

Last spring frostApr 8
First fall frostOct 28
203 frost-free days
Last spring frostApr 81 year in 10 after Apr 25
First fall frostOct 281 year in 10 by Oct 12
Growing season203 daysbetween median 32°F dates
Hardiness zoneZone 7b5 to 10°F average extreme low

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Will it freeze in Henryetta in the next 7 nights?

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

Tonight: forecast low 45°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 Henryetta

The median first fall hard-freeze date (28°F) is November 6, from NOAA’s 1991–2020 Climate Normals at Okmulgee Wtr Wks. 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 31 · Apr 19 · May 3 Oct 5 · Oct 20 · Nov 2 184 days
32°F freeze Mar 23 · Apr 8 · Apr 25 Oct 12 · Oct 28 · Nov 11 203 days
28°F hard freeze Mar 11 · Mar 29 · Apr 15 Oct 22 · Nov 6 · Nov 23 224 days
NOAA NCEI U.S. Climate Normals 1991–2020, station USC00346670. How to read these probabilities.

Average high temperature by month

1991–2020 normals at Okmulgee Wtr Wks

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 Henryetta, OK come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Okmulgee Wtr Wks (station USC00346670, elevation 647 ft), 13 mi from Henryetta. 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 Henryetta

CityDistanceLast spring frostFirst fall frost
Okmulgee, OK 13 mi Apr 8 Oct 28
Holdenville, OK 34 mi Apr 6 Oct 31
Glenpool, OK 35 mi Mar 30 Nov 4
Bixby, OK 35 mi Apr 1 Nov 1
McAlester, OK 37 mi Mar 31 Nov 3
Jenks, OK 39 mi Mar 30 Nov 4
Sapulpa, OK 40 mi Mar 30 Nov 4
Seminole, OK 40 mi Apr 5 Nov 1
Coweta, OK 41 mi Apr 1 Nov 1
Muskogee, OK 41 mi Apr 7 Oct 30

Frequently asked questions

When is the last frost in Henryetta?

On average, the last spring frost (32°F) in Henryetta is around April 8. In about 1 year in 10 it comes after April 25, and in 9 years in 10 it comes after March 23.

When is the first frost in Henryetta?

The first fall frost (32°F) usually arrives around October 28. There’s a 10% chance of a freeze by October 12 and a 90% chance by November 11.

Can it frost in Henryetta 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 April 19.

What growing zone is Henryetta?

Henryetta is in USDA Plant Hardiness Zone 7b (average annual extreme minimum temperature 5 to 10°F), based on the 2023 USDA map for ZIP code 74431. See growing zones in Oklahoma.

More: all Oklahoma frost dates · Oklahoma growing zones · frost vs. freeze