Frost dates / Oklahoma / Midwest City

Frost dates in Midwest City, OK

The station on this page is SPENCER 2ENE MESONET, OK US (USC00348390), 6 miles from the city point. Population in the Census 2024 estimate is 58,505.

Zone 7bUSDA average annual extreme minimum 5°F to 10°F, from ZIP 73110 (1.3 miles from the city point used on this page).

Median last 32°F is April 2. Median first 32°F is November 5. The 50% growing-season length is 217 days. The green band runs from the median last frost to the median first frost. Thin ticks mark the 10%, 50%, and 90% dates.

Outside the median season Growing seasonTicks: 10%, 50%, and 90%

Last 32°F in spring

NCEI’s probability is the chance the last spring minimum of 32°F or lower occurs on or after the date.

Probability	Date	How to read it
90%	March 12	Earlier date. A last 32°F on or after this day is common.
50%	April 2	Median.
10%	April 18	Later date. A last 32°F on or after this day is uncommon.

First 32°F in fall

NCEI’s probability is the chance the first autumn minimum of 32°F or lower occurs on or before the date.

Probability	Date	How to read it
10%	October 20	Earlier date. A first 32°F on or before this day is uncommon.
50%	November 5	Median.
90%	November 20	Later date. A first 32°F on or before this day is common.

32°F growing-season length

Days between the last spring 32°F and the first autumn 32°F. The figure is a length the season meets or exceeds at that probability, from NCEI, not a subtraction done on this site.

Probability the season is at least this long	Days
10%	243
50%	217
90%	194

28°F threshold

	10%	50%	90%
Last, on or after	April 6	March 17	February 28
First, on or before	October 30	November 13	December 1
Season at least	266 days	239 days	212 days

36°F threshold

	10%	50%	90%
Last, on or after	April 28	April 12	March 26
First, on or before	October 14	October 28	November 10
Season at least	219 days	197 days	175 days

Station SPENCER 2ENE MESONET, OK US (USC00348390). Completeness flag R, 11 years used for the 32°F dates. NCEI’s annual probability of at least one day at or below 32°F is 100%. Freeze dates are conditional on that threshold occurring. Elevation 372.8 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.

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Midwest City, OK

Zone 7bAverage annual extreme minimum 5°F to 10°F

Outside the median season Growing seasonTicks: 10%, 50%, and 90%

Oklahoma. Nearest qualified station: SPENCER 2ENE MESONET, OK US (USC00348390), 6 miles. Median last 32°F April 2. Median first 32°F November 5. The 50% growing-season length is 217 days.

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32°F probabilities at this station

	10%	50%	90%
Last 32°F on or after	April 18	April 2	March 12
First 32°F on or before	October 20	November 5	November 20

Column order matches the NCEI file: for the last freeze, 10% is the later date and 90% is the earlier date. How to read the probabilities.

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Planting calendar

Frost dates for Oklahoma are above. Planting windows appear for states with a cited extension guide. The fall and seed tools use the numbers you enter and the station dates.

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