Tomorrow's Weather Forecast - Newcastle

Tomorrow's weather in Newcastle. high 19°C (66°F), low 13°C (55°F). Drizzle.

Tomorrow’s Outlook

Tomorrow brings a similar temperature to today. Expect heavy rain in the afternoon, with rain chances climbing as high as 88%. That risk lines up with humidity averaging 80% through the day the more moisture in the air, the more readily clouds build into showers. Humidity holds around 80%, giving the air a damp, heavy feel even without much heat behind it. A light breeze near 17 km/h is expected. Sunrise is at 5:56 AM and sunset at 5:42 PM, for about 11h 46m of daylight.

Tomorrow
19°/ 13°
Today18° / 13°

Tomorrow’s Hourly Weather Outlook

Morning6 AM – Noon16°
Rain probability
27%
Wind speed
8 km/h
AfternoonNoon – 6 PM19°
Rain probability
88%
Wind speed
15 km/h
Evening6 PM – Midn16°
Rain probability
20%
Wind speed
17 km/h
NightMidn – 6 AM14°
Rain probability
4%
Wind speed
9 km/h

24-Hour Rain & Temperature Forecast

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Temperature · peaks at +19°C

Planning Advice for Tomorrow

Clothing
Waterproof jacket and umbrella strongly recommended.
Outdoor
Not ideal for outdoor plans or car washes — heavy rain expected.
Travel
Expect traffic slowdowns from wet roads. Allow extra time.

Sunrise & Sunset

Sunrise
Dawn 5:26 AM
Total Daylight
Full day forecastSolar noon 11:49 AM
Sunset
Dusk 6:12 PM
vs today+2 min daylight
Sunrise shift1 min earlier
Sunset shift1 min later

5-Day Weather Forecast

Full 15-Day Forecast

Weather Insight

Newcastle is forecast to reach a high of 19°C tomorrow, with an overnight low around 13°C. That's 1° below the long-term average high of 20°C for this time of year. Expect a high chance of rain (88% probability) and a gentle breeze averaging 17 km/h. Air quality is currently Moderate (AQI 55), driven mainly by PM2.5 at 13 μg/m³.

Today vs Normal

18°C-2° below normal

The long-term average high for today is 20°C.

13 of the last 20 days with published data ran above normal.

That's a break from the pattern - today's forecast runs below normal even though the recent stretch mostly ran above.

2026-08-19: 19°C19°2026-08-20: 21°C21°2026-08-21: 20°C20°2026-08-22: 21°C21°2026-08-23: 19°C19°2026-08-24: 22°C22°2026-08-25: 21°C21°2026-08-26: 18°C18°2026-08-27: 18°C18°2026-08-28: 20°C20°2026-08-29: 18°C18°2026-08-30: 19°C19°

Red = above normal, blue = at or below · last 12 days

Air Quality

Air Quality
Moderate

Air quality is acceptable for most people. Unusually sensitive individuals should consider reducing prolonged or heavy outdoor exertion.