Weather forecast for 10 daysNewcastle, WY

Weather forecast for the weekend

Saturday Oct 17, 2026

  • 70°F
  • 39°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 6mphSSE 165°
  • Humidity: 27%
  • UV index: 4
  • Sunrise: 7:14 am MDT
  • Sunset: 6:10 pm MDT
  • ▼
Today, open skies and radiant sunshine are expected.
A notable temperature range, reaching a high of an agreeable 69.8°F and a low of a wintry 39.2°F, is forecasted.
The predicted high will feel warmer, consistent with September's climate average of 68.5°F.
Sunrise was at 7:14 am and sunset will be at 6:10 pm; the daylight will last for 10h and 56min.

Sunday Oct 18, 2026

  • 68°F
  • 36°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 7mphSSE 159°
  • Humidity: 33%
  • UV index: 3
  • Sunrise: 7:15 am MDT
  • Sunset: 6:08 pm MDT
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Tomorrow, on Sunday, October 18, sunny skies are also in store, with excellent visibility.
Significant variations in temperature are anticipated, peaking at a pleasant 68°F and dropping to a low of a wintry 35.6°F.
With a forecast of 68°F, conditions deviate from October's average and instead resemble September's climate trend.
Sunrise will be at 7:15 am and sunset at 6:08 pm; tomorrow's daylight will last for 10h and 53min.

10-day overview

Daily temperatures

Maximum temperature: 70°C.
Coldest day: Saturday 24.10. 52°C.

Chance of precipitation

Highest chance: Saturday 24.10. 48%.

Long-term weather forecast

  • Saturday
  • Oct 17, 2026
  • 70°F
  • 39°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 6mphSSE 165°
  • Humidity: 27%
  • UV index: 4
  • Sunrise: 7:14 am MDT
  • Sunset: 6:10 pm MDT
  • ▼
  • Sunday
  • Oct 18, 2026
  • 68°F
  • 36°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 7mphSSE 159°
  • Humidity: 33%
  • UV index: 3
  • Sunrise: 7:15 am MDT
  • Sunset: 6:08 pm MDT
  • ▼
  • Monday
  • Oct 19, 2026
  • 64°F
  • 43°F
Sunny
Sunny
  • Precip. probability: 3%
  • Precipitation: 0"
  • Wind: 12mphSSE 147°
  • Humidity: 43%
  • UV index: 3
  • Sunrise: 7:16 am MDT
  • Sunset: 6:06 pm MDT
  • ▼
  • Tuesday
  • Oct 20, 2026
  • 70°F
  • 43°F
Sunny
Sunny
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 6mphSSW 202°
  • Humidity: 43%
  • UV index: 3
  • Sunrise: 7:17 am MDT
  • Sunset: 6:05 pm MDT
  • ▼
  • Wednesday
  • Oct 21, 2026
  • 68°F
  • 48°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 8mphSSE 161°
  • Humidity: 42%
  • UV index: 3
  • Sunrise: 7:19 am MDT
  • Sunset: 6:03 pm MDT
  • ▼
  • Thursday
  • Oct 22, 2026
  • 70°F
  • 54°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 3%
  • Precipitation: 0"
  • Wind: 11mphSSE 152°
  • Humidity: 49%
  • UV index: 3
  • Sunrise: 7:20 am MDT
  • Sunset: 6:02 pm MDT
  • ▼
  • Friday
  • Oct 23, 2026
  • 70°F
  • 41°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 15%
  • Precipitation: 0.04"
  • Wind: 11mphS 189°
  • Humidity: 51%
  • UV index: 3
  • Sunrise: 7:21 am MDT
  • Sunset: 6:00 pm MDT
  • ▼
  • Saturday
  • Oct 24, 2026
  • 52°F
  • 37°F
AM Showers
AM Showers
  • Precip. probability: 48%
  • Precipitation: 0.04"
  • Wind: 13mphNNW 332°
  • Humidity: 63%
  • UV index: 2
  • Sunrise: 7:22 am MDT
  • Sunset: 5:58 pm MDT
  • ▼
  • Sunday
  • Oct 25, 2026
  • 55°F
  • 41°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 10%
  • Precipitation: 0"
  • Wind: 9mphSSE 152°
  • Humidity: 57%
  • UV index: 3
  • Sunrise: 7:24 am MDT
  • Sunset: 5:57 pm MDT
  • ▼
  • Monday
  • Oct 26, 2026
  • 57°F
  • 41°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 3%
  • Precipitation: 0"
  • Wind: 9mphS 179°
  • Humidity: 54%
  • UV index: 3
  • Sunrise: 7:25 am MDT
  • Sunset: 5:55 pm MDT
  • ▼
Looking ahead, conditions suggest a period of bright, dull and rainy weather is anticipated.
With minimal precipitation of 0.04", rainfall is predicted for Friday and next Saturday.
There will be a considerable variation in temperature across the forecast period. The temperature is expected to swing from 51.8°F up to 69.8°F, while the variation in nighttime lows will be also notably wide, as the minimum temperature is expected to range between 35.6°F and 53.6°F.
Saturday, Tuesday, Thursday and Friday, with the highest temperature of 69.8°F, will be the warmest days in Newcastle, Wyoming; the coldest day will be next Saturday, with a maximum of 51.8°F.
Updated: Oct 17, 2026 @ 17:03:30 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

Today, in Newcastle, a bright and mostly cloud-free sky is in store.

Today, the maximum temperature will be 69.8°F, while the minimum temperature will be 39.2°F.
The maximum temperature today will be uncommonly higher than the average highest temperature of 50°F in October. The lowest temperature will be relatively higher than the average low of 32.9°F.

On Saturday, in Newcastle, sunrise was at 7:14 am and sunset will be at 6:10 pm (MDT).

Today, the daylight will last for 10h and 56min.

On Sunday, skies are expected to be clear and full of sunshine.

Tomorrow, the highest temperature will be 68°F, while the lowest temperature will be 35.6°F.
The highest temperature will be significantly higher than the average maximum of 50°F in October. The lowest temperature tomorrow will be in line with the average low temperature.

On Sunday, in Newcastle, sunrise will be at 7:15 am and sunset at 6:08 pm (MDT).

Tomorrow, the daylight will last for 10h and 53min.