Newcastle

Sheridan County, Washington, United States

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Current Weather

18°

Mostly Clear

Feels Like: 14°

Min: 12°

Max: 19°

The next few hours will be overcast, with today reaching 19°C and dropping to 13°C. The coming days will be drizzle

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Hourly Forecast

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Today
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Daylight Hours

06:53

Sunrise

19:12

Sunset

12 hours 19 minutes of sunlight today

Moon

Waxing Crescent

12:18

Moonrise

20:25

Moonset

Daily Forecast

Today

12°
19°

Wednesday

16°

Thursday

16°

Friday

10°

Saturday

13°

Sunday

14°

Monday

13°

Tuesday

15°

Wednesday

16°

Thursday

17°

Air Quality Data Available

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UV Index

Wear sunscreen
4 Moderate
Low Extreme

Humidity

57% Comfortable
Low High

Weather in Newcastle today, September 15, 2026

Newcastle sees a largely clear day on September 15, 2026, interrupted by cloudier skies around 16:00. Plan for bright conditions either side of that cloudier interval.

The day peaks near 19°C and cools toward 12°C. Moisture in the air spans 55%-75%, with the highest values around 22:00. Expect gentle winds, highest near 23:00 at 3.9 km/h.

Afternoon conditions open up, holding cloud close to 31% near 16:00. The day finishes on a milder, brighter note. Visibility stays near 16.1 km. The sun rises at 06:53 and sets at 19:12, for a total of 12 hours 19 minutes of sunlight today.

The practical takeaway for Newcastle is a bright September 15, 2026, ideal for outdoor errands before temperatures ease from about 19°C.

Frequently asked questions about weather in Newcastle

How warm does it get in Newcastle?

The warmest month in Newcastle is August, with average high temperatures of 25°C. The average temperature during this period is around 19°C.

How cold does it get in Newcastle?

The coldest month in Newcastle is February, with average low temperatures of 3°C. The average temperature during this period is around 5°C.

What is the wettest time of year in Newcastle?

The wettest month in Newcastle is December, with an average of 204mm of precipitation.

What is the driest time of year in Newcastle?

The driest month in Newcastle is July, with an average of 17mm of precipitation.

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Metric (°C, km/h)