Local weather forecast

Weather in Newcastle, WY

Updated 2026-08-11 09:15 local time · ZIP codes 82701

Sunny
Now77°F

Sunny

High / Low100° / 63°
Rain chance0%
Wind9 mph
Weather alerts

Active alerts

2
Red Flag Warning issued August 10 at 9:27PM MDT until August 11 at 9:00PM MDT by NWS Cheyenne WY

...RED FLAG WARNING HAS EXPIRED FOR LOW RH AND GUSTY WINDS MPH FOR FIRE WEATHER ZONES 417, 418, 419, 420, 421, 422, 423, 424, 425, 426, AND 427... The National Weather Service in Cheyenne has issued a Red Flag Warning, which is in effect from noon to 9 PM MDT Tuesday. * AFFECTED AREA...Fire weather zones 417 through 427. * WIND...North to northwest at 15 to 20 mph with gusts up to 35 mph. * HUMIDITY...Between 9 and 16 percent. * ADDITIONAL DETAILS...Isolated high-based showers will have the potential to produce gusty and erratic winds along with a few strikes of lightning without much, if any, rainfall during the afternoon and evening hours. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended.

Safety instructions

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.

Red Flag Warning issued August 11 at 1:08AM MDT until August 11 at 9:00PM MDT by NWS Cheyenne WY

The National Weather Service in Cheyenne has issued a Red Flag Warning, which is in effect from noon to 9 PM MDT Tuesday. * AFFECTED AREA...Fire weather zones 417 through 430. * WIND...West to northwest at 15 to 20 mph with gusts up to 35 mph, turning northerly into the evening hours. * HUMIDITY...Between 8 and 16 percent. * ADDITIONAL DETAILS...Isolated high-based showers will have the potential to produce gusty and erratic winds along with a few strikes of lightning without much, if any, rainfall during the afternoon and evening hours. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended.

Safety instructions

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.

Hourly

Next hours

NowSunny77°3% rain
10 AMSunny82°1% rain
11 AMSunny91°0% rain
12 PMSunny95°0% rain
1 PMSunny98°0% rain
2 PMSunny100°0% rain
3 PMSunny99°0% rain
4 PMSunny98°0% rain
5 PMSunny96°0% rain
6 PMSunny93°0% rain
7 PMSunny89°0% rain
8 PMSunny81°0% rain
Forecast

3-day weather forecast

Today2026-08-11
Sunny
100° 63°Sunny
Rain 0%Gust 18 mph
Tomorrow2026-08-12
Sunny
91° 67°Sunny
Rain 57%Gust 17 mph
Thursday2026-08-13
Sunny
83° 63°Sunny
Rain 68%Gust 22 mph
Conditions

Weather details

Feels like75°F
Humidity55%
Pressure29.83 inHg
Visibility6 mi
Wind9 mph S
Wind gusts10 mph
Precipitation0.00 in
UV index2
Daylight

Sunrise, sunset and moon

Sunrise05:58 AM
Sunset08:07 PM
Moonrise03:57 AM
Moon phaseNew Moon
Practical guide

Weather insights for today

Umbrella not essential

Rain chance stays relatively low over the next 12 hours (up to 3%).

Light layers should work

It feels like 75°F with winds near 9 mph.

Best window: 9 AM

77°F, 3% rain chance and 9 mph wind.

Driving conditions look generally normal

Visibility is around 6 mi; gusts may reach 23 mph.

Good conditions for an easy run

Current temperature is 77°F, wind 9 mph, rain chance up to 3%.

Low UV protection needs

UV index is 2.

Newcastle weather today

Sunny and 77°F in Newcastle, WY. Today's high is 100°F with a 0% rain chance. Winds are around 9 mph with gusts near 10 mph. Relative humidity is 55%, pressure is 29.83 inHg, and visibility is about 6 miles.

Tonight and tomorrow in Newcastle

Sunrise is at 05:58 AM and sunset is at 08:07 PM. Tomorrow's forecast calls for Sunny with a high near 91°F and a low near 67°F. The maximum rain chance is 57%.

Nearby

Weather near Newcastle

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