New Castle, CO Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for New Castle, CO in one place.
Sunny, with a high near 75.
Local Weather Overview
This forecast page for New Castle, CO 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: May 27, 2026 11:49 PM MDT.
The active forecast window currently covers May 30 to Jun 3, 2026 for New Castle, CO.
Page Snapshot
- Page focus
- city weather
- Forecast window
- May 30 to Jun 3, 2026
- Latest sync
- May 27, 2026 11:49 PM MDT
- Forecast office
- GJT
- Source
- NOAA / NWS
Daily Outlook
This Week in New Castle
Tuesday looks like the warmest upcoming period in New Castle at 87 degrees F.
Saturday Night is the coolest period ahead with temperatures near 42 degrees F.
The strongest winds are forecast for Saturday at about 0 to 15 mph SW.
The forecast from May 30 through Jun 3 stays mostly dry.
Forecast Details
- Last updated
- May 27, 2026 11:49 PM MDT
- Coverage
- 5 days
- Time zone
- America/Denver
- Forecast office
- GJT
- Radar station
- KGJX
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 42.
Sunny, with a high near 80.
Mostly clear, with a low around 43.
Sunny, with a high near 85.
Mostly clear, with a low around 46.
Sunny, with a high near 87.
Partly cloudy, with a low around 47.
Mostly sunny, with a high near 86.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
May 30
|
Sunny
|
75°F |
0 to 15 mph
SW
|
|
Saturday Night
May 30
|
Mostly Clear
|
42°F |
0 to 15 mph
S
|
|
Sunday
May 31
|
Sunny
|
80°F |
0 to 10 mph
S
|
|
Sunday Night
May 31
|
Mostly Clear
|
43°F |
0 to 10 mph
NNE
|
|
Monday
Jun 1
|
Sunny
|
85°F |
0 to 10 mph
S
|
|
Monday Night
Jun 1
|
Mostly Clear
|
46°F |
5 to 10 mph
S
|
|
Tuesday
Jun 2
|
Sunny
|
87°F |
5 to 10 mph
SSW
|
|
Tuesday Night
Jun 2
|
Partly Cloudy
|
47°F |
5 to 10 mph
NE
|
|
Wednesday
Jun 3
|
Mostly Sunny
|
86°F |
0 to 10 mph
SSW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around New Castle.
