Newcastle, OK Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Newcastle, a city in Mcclain County, Oklahoma.
Overnight
45°F
Clear
Clear, with a low around 45. West northwest wind around 5 mph.
7-day forecast for Newcastle
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 45°F | Clear | 5 mph WNW | 0% |
| Wednesday | 67°F | Sunny | 2 to 6 mph WSW | 0% |
| Wednesday Night | 47°F | Mostly Clear | 5 mph SSE | 0% |
| Thursday | 64°F | Partly Sunny then Chance Rain Showers | 5 to 14 mph ENE | 43% |
| Thursday Night | 43°F | Slight Chance Rain Showers then Partly Cloudy | 7 to 14 mph N | 20% |
| Friday | 60°F | Sunny | 7 to 10 mph N | 0% |
| Friday Night | 40°F | Partly Cloudy | 2 to 6 mph NNE | 0% |
| Saturday | 60°F | Mostly Sunny | 5 mph NNE | 1% |
| Saturday Night | 40°F | Partly Cloudy | 2 mph N | 0% |
| Sunday | 65°F | Sunny | 1 to 5 mph N | 0% |
| Sunday Night | 41°F | Clear | 2 mph SSE | 0% |
| Monday | 68°F | Sunny | 2 to 9 mph SSW | 0% |
| Monday Night | 45°F | Mostly Clear | 6 mph SSW | 0% |
| Tuesday | 70°F | Sunny | 6 to 9 mph S | 2% |
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 Nov 4, 2026.