Harman US

May, OK Weather & Growing Conditions

Tonight
68°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms before 4am. Mostly cloudy, with a low around 68. South southeast wind 8 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.

7-day forecast

WhenTempForecastWindPrecip
Tonight 68°F Slight Chance Showers And Thunderstorms 8 to 16 mph SSE 25%
Sunday 86°F Mostly Sunny 12 mph NNE 13%
Sunday Night 62°F Partly Cloudy 7 to 10 mph NE 18%
Monday 81°F Partly Sunny 9 mph NNE 18%
Monday Night 59°F Partly Cloudy 7 mph ENE 5%
Tuesday 80°F Mostly Sunny 8 mph E 6%
Tuesday Night 59°F Partly Cloudy 9 mph ESE 3%
Wednesday 81°F Chance Rain Showers 8 mph SE 29%
Wednesday Night 64°F Chance Showers And Thunderstorms 8 mph SSE 38%
Thursday 88°F Chance Showers And Thunderstorms 6 to 10 mph SSE 47%
Thursday Night 67°F Chance Showers And Thunderstorms 7 mph SSE 52%
Friday 88°F Chance Showers And Thunderstorms 8 mph SSE 52%
Friday Night 68°F Chance Showers And Thunderstorms 8 mph SE 32%
Saturday 90°F Chance Rain Showers 8 to 13 mph SSE 32%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for May, OK

Last spring frost
Apr 21
First fall frost
Oct 19
Growing season
179 days
Hardiness zone
7a

Explore more for May, OK: full frost dates · planting calendar · Oklahoma frost dates

Climate data from the nearest NOAA station, Ft Supply 3Se, Ok (13.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.