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Newcastle, CA Weather Forecast
Newcastle, CA Weather Forecast Dated: 1232 PM Fri Sep 11 2026
Expect a very warm period with plenty of sunshine and mostly dry weather over the coming period. comfortable humidity and no major pressure swings will dominate.
Friday, September 11, 2026
Mid-Morning
76°F 25°C
Sunny
Mid-Afternoon
88°F 31°C
Sunny
Early-Evening
78°F 26°C
Sunny
Warm and summery near 88°F 31°C, sunny throughout the day, with steady humidity and steady pressure. Winds turning from the SSE to the E at 7 mph 10 km/h.
Saturday, September 12, 2026
Mid-Morning
70°F 21°C
Sunny
Mid-Afternoon
81°F 27°C
Sunny
Early-Evening
70°F 21°C
Sunny
Balmy with temperatures reaching 81°F 27°C, sunny throughout the day, with increasing humidity and steady pressure. Winds switching from the SSE to the SE at 8 mph 13 km/h.
Sunday, September 13, 2026
Mid-Morning
64°F 18°C
Sunny
Mid-Afternoon
77°F 25°C
Sunny
Early-Evening
70°F 21°C
Sunny
Enjoyable around 77°F 25°C, sunny throughout the day, with lower humidity and steady pressure. Winds moving from the WNW to the NE at 8 mph 13 km/h.
Monday, September 14, 2026
Mid-Morning
69°F 20°C
Sunny
Mid-Afternoon
82°F 28°C
Sunny
Early-Evening
73°F 23°C
Sunny
Warm temperatures up to 82°F 28°C, sunny throughout the day, with steady humidity and steady pressure. Winds swinging from the S to the ENE at 6 mph 9 km/h.
Tuesday, September 15, 2026
Mid-Morning
71°F 22°C
Sunny
Mid-Afternoon
84°F 29°C
Sunny
Early-Evening
75°F 24°C
Sunny
Very warm with a high of 84°F 29°C, sunny throughout the day, with steady humidity and steady pressure. Winds shifting from the ESE to the ENE at 6 mph 10 km/h.
Wednesday, September 16, 2026
Mid-Morning
72°F 22°C
Sunny
Mid-Afternoon
84°F 29°C
Sunny
Early-Evening
74°F 23°C
Sunny
Warm and summery near 84°F 29°C, cloudy in the morning, becoming sunny through the afternoon and evening, with steady humidity and steady pressure. Winds turning from the SE to the ENE at 5 mph 8 km/h.
Thursday, September 17, 2026
Mid-Morning
76°F 24°C
Sunny
Mid-Afternoon
88°F 31°C
Sunny
Early-Evening
79°F 26°C
Overcast
Balmy with temperatures reaching 88°F 31°C, sunny through the afternoon, turning cloudy this evening, with steady humidity and steady pressure. Winds switching from the ESE to the ENE at 6 mph 9 km/h.
Friday, September 18, 2026
Mid-Morning
79°F 26°C
Overcast
Mid-Afternoon
89°F 32°C
Sunny
Early-Evening
81°F 27°C
Sunny
Quite warm around 89°F 32°C, overcast in the morning, cloudy in the afternoon, and sunny this evening, with steady humidity and steady pressure.
Saturday, September 19, 2026
Mid-Morning
74°F 23°C
Sunny
Mid-Afternoon
82°F 28°C
Sunny
Early-Evening
69°F 21°C
Sunny
Warm temperatures up to 82°F 28°C, sunny throughout the day, with steady humidity and steady pressure. Winds blowing from the SW at 10 mph 17 km/h.
Sunday, September 20, 2026
Mid-Morning
65°F 18°C
Sunny
Mid-Afternoon
80°F 27°C
Sunny
Early-Evening
75°F 24°C
Sunny
Very warm with a high of 80°F 27°C, sunny throughout the day, with steady humidity and barometric pressure falling. Winds swinging from the ESE to the NE at 7 mph 11 km/h.
Monday, September 21, 2026
Mid-Morning
74°F 23°C
Sunny
Mid-Afternoon
89°F 32°C
Sunny
Early-Evening
81°F 27°C
Sunny
Warm and summery near 89°F 32°C, sunny throughout the day, with steady humidity and steady pressure. Winds shifting from the SE to the ENE at 7 mph 11 km/h.
Tuesday, September 22, 2026
Mid-Morning
77°F 25°C
Sunny
Mid-Afternoon
90°F 32°C
Sunny
Early-Evening
80°F 27°C
Sunny
Hot and sweltering around 90°F 32°C, sunny throughout the day, with steady humidity and barometric pressure falling. Winds turning from the SE to the E at 6 mph 9 km/h.
Wednesday, September 23, 2026
Mid-Morning
67°F 19°C
Sunny
Mid-Afternoon
74°F 24°C
Sunny
Early-Evening
67°F 19°C
Sunny
Enjoyable around 74°F 24°C, sunny throughout the day, with steady humidity and steady pressure. Winds switching from the SE to the ENE at 6 mph 10 km/h.
Thursday, September 24, 2026
Mid-Morning
55°F 13°C
Sunny
Mid-Afternoon
67°F 19°C
Sunny
Early-Evening
61°F 16°C
Sunny
Mildly cool near 67°F 19°C, sunny throughout the day, with lower humidity and steady pressure. Winds moving from the SSE to the E at 5 mph 9 km/h.
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