Newcastle, OK Weather & Growing Conditions
Tonight
46°F
Clear
Clear, with a low around 46. Northwest wind around 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 46°F | Clear | 6 mph NW | 0% |
| Wednesday | 67°F | Sunny | 2 to 6 mph WNW | 0% |
| Wednesday Night | 48°F | Mostly Clear | 6 mph S | 0% |
| Thursday | 62°F | Rain Showers Likely | 5 to 13 mph E | 72% |
| Thursday Night | 42°F | Slight Chance Rain Showers then Mostly Clear | 6 to 9 mph N | 16% |
| Friday | 61°F | Sunny | 8 mph N | 0% |
| Friday Night | 41°F | Partly Cloudy | 1 to 5 mph NNE | 0% |
| Saturday | 62°F | Mostly Sunny | 1 to 5 mph NNW | 1% |
| Saturday Night | 42°F | Mostly Clear | 3 mph WNW | 3% |
| Sunday | 66°F | Sunny | 5 mph W | 2% |
| Sunday Night | 42°F | Clear | 3 mph SSW | 1% |
| Monday | 69°F | Sunny | 5 to 12 mph SSW | 1% |
| Monday Night | 46°F | Mostly Clear | 7 mph S | 1% |
| Tuesday | 71°F | Sunny | 6 to 10 mph S | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Newcastle, OK
Last spring frost
Mar 31
First fall frost
Nov 5
Growing season
219 days
Hardiness zone
7b
Explore more for Newcastle, OK: full frost dates · planting calendar · Oklahoma frost dates
Climate data from the nearest NOAA station, Norman 2Nw Mesonet, Ok (8.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.