New Castle, CO Weather Forecast
Local 7-day forecast
Slight Chance Rain Showers then Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for New Castle, CO in one place.
A slight chance of rain showers before noon. Mostly sunny, with a high near 59. East northeast wind 0 to 10 mph. Chance of precipitation is 20%.
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: Oct 13, 2026 8:57 PM MDT.
The active forecast window currently covers Oct 15 to Oct 20, 2026 for New Castle, CO.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 15 to Oct 20, 2026
- Latest sync
- Oct 13, 2026 8:57 PM MDT
- Forecast office
- GJT
- Source
- NOAA / NWS
Daily Outlook
This Week in New Castle
Monday looks like the warmest upcoming period in New Castle at 67 degrees F.
Thursday Night is the coolest period ahead with temperatures near 29 degrees F.
The strongest winds are forecast for Tuesday at about 5 to 15 mph S.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 13, 2026 8:57 PM MDT
- Coverage
- 6 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 29. East northeast wind 5 to 10 mph.
Sunny, with a high near 64.
Mostly clear, with a low around 34.
Sunny, with a high near 65.
Partly cloudy, with a low around 38.
Mostly sunny, with a high near 63.
Mostly clear, with a low around 37.
Sunny, with a high near 67.
Mostly clear, with a low around 42.
A chance of rain showers. Partly sunny, with a high near 67.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Oct 15
|
Slight Chance Rain Showers then Mostly Sunny
|
59°F |
0 to 10 mph
ENE
|
|
Thursday Night
Oct 15
|
Mostly Clear
|
29°F |
5 to 10 mph
ENE
|
|
Friday
Oct 16
|
Sunny
|
64°F |
0 to 5 mph
ESE
|
|
Friday Night
Oct 16
|
Mostly Clear
|
34°F |
0 to 5 mph
NE
|
|
Saturday
Oct 17
|
Sunny
|
65°F |
0 to 5 mph
SSW
|
|
Saturday Night
Oct 17
|
Partly Cloudy
|
38°F |
0 mph
|
|
Sunday
Oct 18
|
Mostly Sunny
|
63°F |
0 to 5 mph
S
|
|
Sunday Night
Oct 18
|
Mostly Clear
|
37°F |
0 mph
|
|
Monday
Oct 19
|
Sunny
|
67°F |
0 to 5 mph
S
|
|
Monday Night
Oct 19
|
Mostly Clear
|
42°F |
0 to 10 mph
SSE
|
|
Tuesday
Oct 20
|
Chance Rain Showers
|
67°F |
5 to 15 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around New Castle.
