Newcastle, WY Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Newcastle, WY in one place.
Sunny, with a high near 95. Southeast wind around 6 mph, with gusts as high as 16 mph.
Local Weather Overview
This forecast page for Newcastle, WY is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Jul 14, 2026 4:26 PM MDT.
The active forecast window currently covers Jul 16 to Jul 20, 2026 for Newcastle, WY.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 16 to Jul 20, 2026
- Latest sync
- Jul 14, 2026 4:26 PM MDT
- Forecast office
- UNR
- Source
- NOAA / NWS
Daily Outlook
This Week in Newcastle
Saturday looks like the warmest upcoming period in Newcastle at 99 degrees F.
Monday Night is the coolest period ahead with temperatures near 64 degrees F.
The strongest winds are forecast for Saturday Night at about 6 to 12 mph E.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 14, 2026 4:26 PM MDT
- Coverage
- 6 days
- Time zone
- America/Denver
- Forecast office
- UNR
- Radar station
- KUDX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 69. East wind around 7 mph, with gusts as high as 16 mph.
A slight chance of showers and thunderstorms after noon. Sunny, with a high near 96.
Mostly clear, with a low around 71.
Sunny, with a high near 99.
Partly cloudy, with a low around 72.
A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 96.
A chance of showers and thunderstorms before midnight, then a chance of showers and thunderstorms. Partly cloudy, with a low around 68.
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 89.
A chance of showers and thunderstorms before midnight, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Jul 16
|
Sunny
|
95°F |
6 mph
SE
|
|
Thursday Night
Jul 16
|
Mostly Clear
|
69°F |
7 mph
E
|
|
Friday
Jul 17
|
Sunny then Slight Chance Showers And Thunderstorms
|
96°F |
2 to 9 mph
SE
|
|
Friday Night
Jul 17
|
Mostly Clear
|
71°F |
6 to 9 mph
E
|
|
Saturday
Jul 18
|
Sunny
|
99°F |
6 to 10 mph
SE
|
|
Saturday Night
Jul 18
|
Partly Cloudy
|
72°F |
6 to 12 mph
E
|
|
Sunday
Jul 19
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
96°F |
6 to 9 mph
N
|
|
Sunday Night
Jul 19
|
Chance Showers And Thunderstorms
|
68°F |
3 to 9 mph
N
|
|
Monday
Jul 20
|
Mostly Sunny then Chance Showers And Thunderstorms
|
89°F |
3 to 8 mph
W
|
|
Monday Night
Jul 20
|
Chance Showers And Thunderstorms
|
64°F |
3 to 8 mph
NE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Newcastle.
