Weather forecast for 10 daysNewcastle, CA
Weather forecast for the weekend
Sunday Oct 18, 2026
- 84°F
- 52°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 8mphS 175°
- Humidity: 25%
- UV index: 5
- Sunrise: 7:17 am PDT
- Sunset: 6:21 pm PDT
- details ▼
On Sunday, October 18, sun-filled conditions are also expected to persist.
Day and night temperatures will contrast sharply, ranging from a peak of a temperate 84.2°F to a low of a cool 51.8°F.
With a forecast of 84.2°F, conditions deviate from October's average and instead resemble September's climate trend.
Sunrise will be at 7:17 am and sunset at 6:21 pm; tomorrow's daylight will last for 11h and 5min.
Day and night temperatures will contrast sharply, ranging from a peak of a temperate 84.2°F to a low of a cool 51.8°F.
With a forecast of 84.2°F, conditions deviate from October's average and instead resemble September's climate trend.
Sunrise will be at 7:17 am and sunset at 6:21 pm; tomorrow's daylight will last for 11h and 5min.
10-day overview
Daily temperatures
Warmest day: tomorrow 84°C.
Coldest day: Thursday 64°C.
Coldest day: Thursday 64°C.
Chance of precipitation
Highest chance: Wednesday - Thursday 39%.
Long-term weather forecast
- Saturday
- Oct 17, 2026
- min.
- 61°F
Clear
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 7mphE 91°
- Humidity: 29%
- UV index: 0
- Sunrise: 7:16 am PDT
- Sunset: 6:23 pm PDT
- details ▼
- Sunday
- Oct 18, 2026
- 84°F
- 52°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 8mphS 175°
- Humidity: 25%
- UV index: 5
- Sunrise: 7:17 am PDT
- Sunset: 6:21 pm PDT
- details ▼
- Monday
- Oct 19, 2026
- 72°F
- 50°F
Partly Cloudy
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 9mphS 179°
- Humidity: 45%
- UV index: 5
- Sunrise: 7:18 am PDT
- Sunset: 6:20 pm PDT
- details ▼
- Tuesday
- Oct 20, 2026
- 72°F
- 57°F
Mostly Cloudy
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 6mphWSW 242°
- Humidity: 45%
- UV index: 3
- Sunrise: 7:19 am PDT
- Sunset: 6:19 pm PDT
- details ▼
- Wednesday
- Oct 21, 2026
- 68°F
- 55°F
PM Showers
- Precip. probability: 39%
- Precipitation: 0.16"
- Wind: 6mphSSE 167°
- Humidity: 53%
- UV index: 3
- Sunrise: 7:20 am PDT
- Sunset: 6:17 pm PDT
- details ▼
- Thursday
- Oct 22, 2026
- 64°F
- 54°F
Showers
- Precip. probability: 39%
- Precipitation: 0.08"
- Wind: 7mphSSW 197°
- Humidity: 71%
- UV index: 3
- Sunrise: 7:21 am PDT
- Sunset: 6:16 pm PDT
- details ▼
- Friday
- Oct 23, 2026
- 70°F
- 50°F
Sunny
- Precip. probability: 17%
- Precipitation: 0"
- Wind: 6mphSW 219°
- Humidity: 64%
- UV index: 4
- Sunrise: 7:22 am PDT
- Sunset: 6:15 pm PDT
- details ▼
- Saturday
- Oct 24, 2026
- 70°F
- 52°F
Partly Cloudy
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 6mphSSW 194°
- Humidity: 52%
- UV index: 4
- Sunrise: 7:23 am PDT
- Sunset: 6:13 pm PDT
- details ▼
- Sunday
- Oct 25, 2026
- 70°F
- 50°F
Partly Cloudy
- Precip. probability: 23%
- Precipitation: 0"
- Wind: 7mphSSW 194°
- Humidity: 49%
- UV index: 4
- Sunrise: 7:24 am PDT
- Sunset: 6:12 pm PDT
- details ▼
- Monday
- Oct 26, 2026
- 68°F
- 48°F
Partly Cloudy
- Precip. probability: 16%
- Precipitation: 0"
- Wind: 7mphSSW 210°
- Humidity: 45%
- UV index: 4
- Sunrise: 7:25 am PDT
- Sunset: 6:11 pm PDT
- details ▼
Looking ahead, conditions suggest a period of gloomy, bright and rain-soaked weather is expected.
Rainfall is forecasted for Wednesday and Thursday.
Substantial differences in temperature are forecasted throughout the forecast window. Forecast highs will fluctuate between 64.4°F and 84.2°F, while the variation in nighttime lows will be also notably wide, as nighttime lows are forecast to fall between 48.2°F and 60.8°F.
Sunday will be the hottest day, with a maximum temperature of 84.2°F; the coldest day will be Thursday, with a maximum of 64.4°F.
Rainfall is forecasted for Wednesday and Thursday.
Substantial differences in temperature are forecasted throughout the forecast window. Forecast highs will fluctuate between 64.4°F and 84.2°F, while the variation in nighttime lows will be also notably wide, as nighttime lows are forecast to fall between 48.2°F and 60.8°F.
Sunday will be the hottest day, with a maximum temperature of 84.2°F; the coldest day will be Thursday, with a maximum of 64.4°F.
Updated: Oct 18, 2026 @ 04:05:54 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate
Frequently asked questions
On Sunday, in Newcastle, the outlook remains bright and sunny.
Tomorrow, the highest temperature will be 84.2°F, while the lowest temperature will be 51.8°F.
Tomorrow, the maximum temperature will be uncommonly higher than the average highest temperature of 73.6°F in October. Tomorrow, the lowest temperature will be in line with the average low temperature.
Tomorrow, the maximum temperature will be uncommonly higher than the average highest temperature of 73.6°F in October. Tomorrow, the lowest temperature will be in line with the average low temperature.
On Sunday, in Newcastle, sunrise will be at 7:17 am and sunset at 6:21 pm (PDT).
In Newcastle, tomorrow, there will be 11h and 5min of daylight.
