Live Weather & Forecast
Weather in New Castle
Colorado, United States · Real-time conditions & 3-day outlook
15°C
Feels like 15°C
60°F / Feels 60°F
Clear
New Castle, Colorado
🌙 Nighttime
Updated: 2026-04-13 03:00
Humidity
19%
Wind
12.6 km/h SW
Wind Gust
26.2 km/h
Pressure
1012 mb
Visibility
16 km
UV Index
0
(Low)
Precipitation
0 mm
Cloud Cover
25%
Dew Point
-1.7°C
Wind Degree
218°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
135.9 μg/m³
NO₂
1.9 μg/m³
O₃
100 μg/m³
SO₂
1.2 μg/m³
PM 2.5
3.5 μg/m³
PM 10
12.9 μg/m³
Today's Hourly Forecast
24-hour breakdown for New Castle, Colorado
12 AM
3°
Thundery outbreaks in nearby
1 AM
2°
Cloudy
2 AM
1°
Cloudy
3 AM
15°
Clear
4 AM
-1°
Clear
5 AM
-2°
Clear
6 AM
-1°
Clear
7 AM
2°
Sunny
8 AM
6°
Sunny
9 AM
8°
Sunny
10 AM
10°
Sunny
11 AM
11°
Sunny
12 PM
13°
Sunny
1 PM
13°
Partly Cloudy
2 PM
13°
Sunny
3 PM
14°
Sunny
4 PM
13°
Sunny
5 PM
12°
Partly Cloudy
6 PM
12°
Sunny
7 PM
10°
Partly Cloudy
8 PM
8°
Overcast
9 PM
6°
Overcast
10 PM
4°
Partly Cloudy
11 PM
2°
Overcast
3-Day Forecast
Daily overview for New Castle, Colorado
Today
Partly Cloudy
14°
/
-2°
🌧️ 0% chance of rain
💧 Avg. humidity: 55%
💨 Max wind: 20.2 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.6
🌅 Sunrise: 06:36 AM
🌇 Sunset: 07:47 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Heavy rain
7°
/
-2°
🌧️ 89% chance of rain
❄️ 24% chance of snow
💧 Avg. humidity: 86%
💨 Max wind: 10.4 km/h
🌧️ Total precip: 34.67 mm
☀️ UV Index: 0.8
🌅 Sunrise: 06:35 AM
🌇 Sunset: 07:48 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Wed, Apr 15
Sunny
15°
/
-7°
🌧️ 0% chance of rain
💧 Avg. humidity: 56%
💨 Max wind: 15.1 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.8
🌅 Sunrise: 06:33 AM
🌇 Sunset: 07:49 PM
🌙 Waning Crescent
🌑 Moon: 8% lit
Best Time to Visit New Castle
Plan your trip to New Castle, United States around the most favorable weather conditions.
Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
Frequently Asked Questions
What is the current weather in New Castle?
Current conditions in New Castle: Clear, temperature 15°C, humidity 19%.
What is the best time to visit New Castle?
The best time to visit New Castle is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in New Castle?
New Castle is located at approximately 39.6° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in New Castle?
The wettest period in New Castle is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to New Castle?
For visits to New Castle during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is New Castle in?
New Castle is located in United States, in the state of Colorado.
What are the public holidays in New Castle in 2026?
View the 2026 public holidays for New Castle on our Holidays page.
What are the GPS coordinates used for the weather forecast in New Castle?
The weather forecast for New Castle uses coordinates 39.5715, -107.535.