USDA Hardiness Zone 7b
Frost Dates for 73003 — Edmond, Oklahoma
NOAA 1991–2020 normals from Guthrie 4WSW Mesonet, OK (1,082 ft), 12 miles north.
Updated
In Edmond, the last spring frost (32°F) is around April 3 in half of years and has passed by April 20 in nine years out of ten. The first fall frost comes around November 4, as early as October 20 one year in ten, leaving a typical freeze-free season of 214 days (NOAA, Guthrie 4WSW Mesonet, OK).
- Last spring frost
- April 3
- First fall frost
- November 4
- Growing season
- 214 days
- Hardiness zone
- 7b
50% probability
50% probability
freeze-free, 50%
5 to 10°F (-15.0 to -12.2°C) coldest night
- First snow
- December 13
- Last snow
- February 16
- Winters with snow
- 96%
- Snow per year
- 7.1"
median, 1991–2020
median, 1991–2020
23 of 24 observed
NOAA normal
Frost risk by date in Edmond
Half of springs at Guthrie 4WSW Mesonet, OK see their last 32°F night by April 3; only one in ten is past it by March 14, and one in ten still has one after April 20. Planting tender crops after April 10 leaves a 30% risk of a frost on them, after April 14 20%, and after April 20 10%. The 17 days between the even-odds date and the one-in-ten date is narrower than at 41% of the 114 Oklahoma stations behind this site's ZIP pages.
In fall the first 32°F night comes by November 4 in half of years, as early as October 20 one year in ten, and holds off past November 20 one year in ten. A hard freeze of 28°F follows 10 days later, around November 14; in spring the one-in-ten date for 28°F is April 8, 12 days before the 32°F one. The freeze-free season lasts 214 days in a typical year, longer than at 61% of the 114 Oklahoma stations; it reaches 240 days one year in ten and falls short of 192 one year in ten. On average 75 nights a year drop to 32°F or below. Nights of 36°F, when frost can still settle on leaves in low, open spots, continue 11 days longer, to about April 14, and return around October 27. Severe cold of 16°F or below comes in 98% of winters, usually between December 20 and February 12.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Mar 29 | Apr 3 | Apr 8 | Apr 11 | Apr 14 | Apr 18 | Apr 22 | Apr 26 | Apr 30 |
| 32°F | Mar 14 | Mar 22 | Mar 27 | Mar 31 | Apr 3 | Apr 6 | Apr 10 | Apr 14 | Apr 20 |
| 28°F | Mar 1 | Mar 7 | Mar 12 | Mar 15 | Mar 20 | Mar 24 | Mar 29 | Apr 2 | Apr 8 |
| 24°F | Feb 17 | Feb 25 | Mar 1 | Mar 4 | Mar 7 | Mar 11 | Mar 14 | Mar 19 | Mar 28 |
| 20°F | Feb 1 | Feb 11 | Feb 17 | Feb 23 | Feb 27 | Mar 2 | Mar 5 | Mar 9 | Mar 14 |
| 16°F98% of yrs | Jan 13 | Jan 26 | Feb 1 | Feb 7 | Feb 12 | Feb 19 | Feb 24 | Mar 2 | Mar 7 |
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 13 | Oct 18 | Oct 22 | Oct 24 | Oct 27 | Oct 30 | Nov 1 | Nov 4 | Nov 9 |
| 32°F | Oct 20 | Oct 25 | Oct 30 | Nov 1 | Nov 4 | Nov 7 | Nov 11 | Nov 14 | Nov 20 |
| 28°F | Oct 29 | Nov 3 | Nov 6 | Nov 10 | Nov 14 | Nov 17 | Nov 21 | Nov 25 | Dec 1 |
| 24°F | Nov 5 | Nov 12 | Nov 16 | Nov 19 | Nov 24 | Nov 27 | Dec 1 | Dec 4 | Dec 10 |
| 20°F | Nov 15 | Nov 22 | Nov 26 | Dec 1 | Dec 4 | Dec 8 | Dec 12 | Dec 18 | Dec 26 |
| 16°F98% of yrs | Nov 27 | Dec 3 | Dec 10 | Dec 14 | Dec 20 | Dec 25 | Dec 31 | Jan 5 | Jan 16 |
Freeze probabilities 1991–2020 at Guthrie 4WSW Mesonet, OK, from NOAA NCEI U.S. Climate Normals. Where a temperature is reached in fewer than 99.5% of years, the dates describe only the years that reach it. Not a forecast.
Frost risk on any date in 73003 →Compare Edmond with another place →
Weather by month in Edmond
July is the warmest month at Guthrie 4WSW Mesonet, OK, averaging 94°F by day and 72°F at night; January is the coldest at 50°F and 28°F. A freezing night is all but certain in every month from November to March (a 90% chance or more). From May to September the chance of a 32°F night stays under 10% each month. In spring, April still brings one in 58% of years.
Warmth for growing adds up to 5,171 growing degree days a year (base 50°F), more than at 56% of the 114 Oklahoma stations. 38% of them (1,961) have built up by the end of June, and July adds the most, 1,013.
| Month | High °F | Low °F | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|
| Jan | 50 | 28 | 100% | 22 | 19 |
| Feb | 54 | 31 | 100% | 16 | 50 |
| Mar | 63 | 40 | 96% | 7 | 163 |
| Apr | 72 | 48 | 58% | 2 | 317 |
| May | 79 | 58 | 1% | <1 | 580 |
| Jun | 88 | 68 | 0% | 0 | 834 |
| Jul | 94 | 72 | 0% | 0 | 1013 |
| Aug | 93 | 70 | 0% | 0 | 968 |
| Sep | 84 | 62 | 0% | 0 | 697 |
| Oct | 73 | 51 | 35% | 1 | 392 |
| Nov | 61 | 39 | 97% | 8 | 118 |
| Dec | 50 | 30 | 100% | 19 | 21 |
Monthly normals 1991–2020 at Guthrie 4WSW Mesonet, OK (1,082 ft), NOAA NCEI. "32°F night": chance of at least one in the month. GDD: growing degree days, base 50°F.
Compared with the next station
The nearest other station, Oklahoma City Post Airport, OK, 12 miles southwest of Edmond and 215 feet higher, has a last frost 1 day earlier (April 2), the same first-frost date, a season 2 days longer.
When it snows in Edmond, Oklahoma
The first measurable snow (0.1 inch or more) in Edmond usually arrives around December 13, and the last of the season around February 16. Those are the middle dates across the winters of 1991–2020 at Guthrie 5S, OK, 12.1 miles away: half of years saw snow earlier, half later. Snow fell in 96% of those winters. The last 32°F night of spring typically comes 46 days after the last snow.
Planting calendar for 73003
| When | What to do |
|---|---|
| January 23 – February 6 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| February 6 – February 20 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| March 6 – March 20 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| April 3 onward | Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast. |
| by August 12 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by October 21 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| November 4 onward | Plant garlic, mulch beds, lift tender bulbsGarlic wants a cold spell; bare soil loses structure over winter. |
The weeks before and after the 50% dates are general rules of thumb, not NOAA figures; a seed packet gives the timing for each variety.
Where these figures come from
ZIP 73003 is 12 miles from Guthrie 4WSW Mesonet, OK, which stands at 1,082 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 73003 in zone 7b, the band where the coldest night of the year averaged 5 to 10°F (-15.0 to -12.2°C) over 1991–2020; a zone describes winter lows, not frost dates.
Hardiness zone and temperature range: USDA Plant Hardiness Zone Map 2023 (USDA-ARS, Oregon State University), ZIP-code listing, unchanged. °C converted from °F by this site.
Thirty-year averages, not a forecast: check the forecast before planting out. How stations are matched and which pages are offered to search engines: methodology.