Live Weather & Forecast

Weather in Newcastle

Wyoming, United States · Real-time conditions & 3-day outlook

Flag of United States
Clear
8°C
Feels like 6°C
46°F / Feels 43°F
Clear
Newcastle, Wyoming
🌙 Nighttime
Updated: 2026-04-13 04:00
💧
Humidity
59%
💨
Wind
9.4 km/h S
🌬️
Wind Gust
19.7 km/h
🌡️
Pressure
1006 mb
👁️
Visibility
10 km
☀️
UV Index
0 (Low)
🌧️
Precipitation
0 mm
☁️
Cloud Cover
0%
💦
Dew Point
-0.6°C
🌐
Wind Degree
187°

Air Quality Index

US EPA: Good UK DEFRA: Low (1)
CO
135.9 μg/m³
NO₂
2.4 μg/m³
O₃
95 μg/m³
SO₂
1.2 μg/m³
PM 2.5
4.6 μg/m³
PM 10
13.6 μg/m³

Weather Alerts 1

Met · Severe · Expected
Red Flag Warning issued April 12 at 12:12PM MDT until April 13 at 9:00PM MDT by NWS Rapid City SD

...CRITICAL FIRE WEATHER CONDITIONS THROUGH MONDAY ACROSS PORTIONS OF NORTHEASTERN WYOMING AND WESTERN SOUTH DAKOTA... .Warm, very dry, and breezy weather will support critical fire weather conditions over portions of northeastern Wyoming and western South Dakota this afternoon and again Monday afternoon. * AFFECTED AREA...Fire Weather Zones 315 Southern Campbell, 317 Weston County Plains, 320 C...

A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.

Effective: 2026-04-12T12:12:00-06:00  ·  Expires: 2026-04-13T03:15:00-06:00

Today's Hourly Forecast

24-hour breakdown for Newcastle, Wyoming

12 AM
Clear
11°
Clear
💧 39% 💨 3.2 km/h
1 AM
Clear
10°
Clear
💧 43% 💨 2.5 km/h
2 AM
Clear
8°
Clear
💧 48% 💨 3.6 km/h
3 AM
Clear
8°
Clear
💧 61% 💨 9.4 km/h
4 AM
Clear
8°
Clear
💧 59% 💨 9.4 km/h
5 AM
Clear
7°
Clear
💧 58% 💨 6.5 km/h
6 AM
Clear
7°
Clear
💧 64% 💨 6.5 km/h
7 AM
Sunny
9°
Sunny
💧 53% 💨 8.3 km/h
8 AM
Sunny
11°
Sunny
💧 50% 💨 12.6 km/h
9 AM
Sunny
13°
Sunny
💧 47% 💨 25.2 km/h
10 AM
Sunny
15°
Sunny
💧 41% 💨 31.3 km/h
11 AM
Sunny
18°
Sunny
💧 34% 💨 32.4 km/h
12 PM
Sunny
19°
Sunny
💧 22% 💨 40 km/h
1 PM
Sunny
19°
Sunny
💧 16% 💨 41.8 km/h
2 PM
Sunny
19°
Sunny
💧 14% 💨 42.5 km/h
3 PM
Sunny
19°
Sunny
💧 19% 💨 47.5 km/h
4 PM
Sunny
19°
Sunny
💧 16% 💨 53.3 km/h
5 PM
Sunny
18°
Sunny
💧 23% 💨 35.6 km/h
6 PM
Sunny
17°
Sunny
💧 19% 💨 29.5 km/h
7 PM
Sunny
15°
Sunny
💧 26% 💨 22 km/h
8 PM
Clear
13°
Clear
💧 34% 💨 14.4 km/h
9 PM
Clear
12°
Clear
💧 25% 💨 13.7 km/h
10 PM
Clear
11°
Clear
💧 52% 💨 7.6 km/h
11 PM
Clear
8°
Clear
💧 56% 💨 4 km/h

3-Day Forecast

Daily overview for Newcastle, Wyoming

Today
Sunny
Sunny
20° / 7°
🌧️ 0% chance of rain
💧 Avg. humidity: 38%
💨 Max wind: 53.3 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.5
🌅 Sunrise: 06:17 AM
🌇 Sunset: 07:39 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Cloudy
Cloudy
17° / 3°
🌧️ 0% chance of rain
💧 Avg. humidity: 40%
💨 Max wind: 22.3 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.4
🌅 Sunrise: 06:15 AM
🌇 Sunset: 07:40 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Wed, Apr 15
Sunny
Sunny
21° / 2°
🌧️ 0% chance of rain
💧 Avg. humidity: 37%
💨 Max wind: 25.2 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.6
🌅 Sunrise: 06:14 AM
🌇 Sunset: 07:41 PM
🌙 Waning Crescent
🌑 Moon: 8% lit

Best Time to Visit Newcastle

Plan your trip to Newcastle, 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.
← Back to Newcastle 🗓 View Holidays 2026

Frequently Asked Questions

What is the current weather in Newcastle?
Current conditions in Newcastle: Clear, temperature 8°C, humidity 59%.
What is the best time to visit Newcastle?
The best time to visit Newcastle is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Newcastle?
Newcastle is located at approximately 43.9° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Newcastle?
The wettest period in Newcastle is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Newcastle?
For visits to Newcastle during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Newcastle in?
Newcastle is located in United States, in the state of Wyoming.
What are the public holidays in Newcastle in 2026?
View the 2026 public holidays for Newcastle on our Holidays page.
What are the GPS coordinates used for the weather forecast in Newcastle?
The weather forecast for Newcastle uses coordinates 43.8547, -104.2051.