Newcastle, OK Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Newcastle, a city in Mcclain County, Oklahoma.
Overnight
73°F
Partly Cloudy
Partly cloudy, with a low around 73. South wind around 10 mph.
7-day forecast for Newcastle
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 73°F | Partly Cloudy | 10 mph S | 0% |
| Saturday | 98°F | Sunny | 12 to 15 mph S | 1% |
| Saturday Night | 74°F | Mostly Clear | 14 mph S | 11% |
| Sunday | 94°F | Showers And Thunderstorms Likely | 13 mph S | 71% |
| Sunday Night | 66°F | Showers And Thunderstorms Likely | 6 to 9 mph E | 71% |
| Monday | 85°F | Chance Showers And Thunderstorms then Mostly Sunny | 7 to 12 mph NNE | 33% |
| Monday Night | 61°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 10 mph NE | 21% |
| Tuesday | 80°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 8 to 13 mph NE | 21% |
| Tuesday Night | 58°F | Partly Cloudy | 7 to 10 mph NE | 6% |
| Wednesday | 82°F | Mostly Sunny | 8 mph ENE | 12% |
| Wednesday Night | 60°F | Partly Cloudy | 7 mph E | 7% |
| Thursday | 85°F | Slight Chance Rain Showers | 7 mph SE | 20% |
| Thursday Night | 63°F | Mostly Cloudy | 7 mph E | 11% |
| Friday | 86°F | Partly Sunny | 7 mph SE | 14% |
Forecast source: National Weather Service (api.weather.gov) for Newcastle (35.242, -97.595). Updated through the day.
Growing snapshot for Newcastle
Last spring frost
Mar 31
First fall frost
Nov 5
Growing season
219 days
Hardiness zone
7b
More local growing data for Newcastle: nearby ZIP 73065 weather · frost dates · planting calendar · Oklahoma frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Norman 2Nw Mesonet, Ok (8.3 mi from Newcastle). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.