Weather forecast for 10 daysRancho Santa Margarita, CA
Weather forecast for the weekend
Sunday Oct 18, 2026
- 82°F
- 59°F
Mostly Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 8mphWSW 254°
- Humidity: 30%
- UV index: 6
- Sunrise: 6:57 am PDT
- Sunset: 6:13 pm PDT
- details ▼
Today, on Sunday, October 18, a pleasant, mostly sunny outlook is in place.
The maximum temperature will be a moderately hot 82.4°F, while the minimum expected temperature is a refreshing 59°F.
Today, it will be warmer, and the temperature will align more with September's typical maximum of 79.7°F.
Sunrise was at 6:57 am and sunset will be at 6:13 pm; the daylight will last for 11h and 16min.
The maximum temperature will be a moderately hot 82.4°F, while the minimum expected temperature is a refreshing 59°F.
Today, it will be warmer, and the temperature will align more with September's typical maximum of 79.7°F.
Sunrise was at 6:57 am and sunset will be at 6:13 pm; the daylight will last for 11h and 16min.
10-day overview
Daily temperatures
Warmest day: tomorrow 84°C.
Coldest day: Thursday 68°C.
Coldest day: Thursday 68°C.
Chance of precipitation
Highest chance: Thursday 65%.
Long-term weather forecast
- Sunday
- Oct 18, 2026
- 82°F
- 59°F
Mostly Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 8mphWSW 254°
- Humidity: 30%
- UV index: 6
- Sunrise: 6:57 am PDT
- Sunset: 6:13 pm PDT
- details ▼
- Monday
- Oct 19, 2026
- 84°F
- 57°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 9mphSSW 203°
- Humidity: 42%
- UV index: 6
- Sunrise: 6:58 am PDT
- Sunset: 6:11 pm PDT
- details ▼
- Tuesday
- Oct 20, 2026
- 81°F
- 57°F
Sunny
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 9mphS 177°
- Humidity: 55%
- UV index: 6
- Sunrise: 6:59 am PDT
- Sunset: 6:10 pm PDT
- details ▼
- Wednesday
- Oct 21, 2026
- 75°F
- 55°F
Showers
- Precip. probability: 63%
- Precipitation: 0.47"
- Wind: 10mphS 171°
- Humidity: 67%
- UV index: 6
- Sunrise: 7:00 am PDT
- Sunset: 6:09 pm PDT
- details ▼
- Thursday
- Oct 22, 2026
- 68°F
- 54°F
Scattered Thunderstorms
- Precip. probability: 65%
- Precipitation: 0.16"
- Wind: 8mphSSW 201°
- Humidity: 74%
- UV index: 4
- Sunrise: 7:01 am PDT
- Sunset: 6:08 pm PDT
- details ▼
- Friday
- Oct 23, 2026
- 72°F
- 55°F
Mostly Sunny
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 7mphW 261°
- Humidity: 64%
- UV index: 5
- Sunrise: 7:01 am PDT
- Sunset: 6:07 pm PDT
- details ▼
- Saturday
- Oct 24, 2026
- 81°F
- 57°F
Sunny
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 7mphNNW 328°
- Humidity: 45%
- UV index: 5
- Sunrise: 7:02 am PDT
- Sunset: 6:06 pm PDT
- details ▼
- Sunday
- Oct 25, 2026
- 81°F
- 55°F
Partly Cloudy
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 7mphW 271°
- Humidity: 43%
- UV index: 5
- Sunrise: 7:03 am PDT
- Sunset: 6:05 pm PDT
- details ▼
- Monday
- Oct 26, 2026
- 79°F
- 55°F
Partly Cloudy
- Precip. probability: 13%
- Precipitation: 0"
- Wind: 8mphSSW 208°
- Humidity: 48%
- UV index: 5
- Sunrise: 7:04 am PDT
- Sunset: 6:04 pm PDT
- details ▼
- Tuesday
- Oct 27, 2026
- 75°F
- 54°F
Partly Cloudy
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 7mphSSW 201°
- Humidity: 50%
- UV index: 5
- Sunrise: 7:05 am PDT
- Sunset: 6:03 pm PDT
- details ▼
Mixed conditions are forecasted for the coming ten days, and a mix of sunny, cloudy, rain-filled and thunderstorm-prone weather is expected.
Rain is forecasted for Wednesday and Thursday.
Significant changes in temperature are expected throughout the forecast window. Maximum temperatures are forecasted between 68°F and 84.2°F, while the nighttime low will be mostly stable, as the lowest temperatures will remain in the range of 53.6°F to 59°F.
Expect the hottest day on Monday, with temperatures peaking at 84.2°F; the coldest day will be Thursday, with a maximum of 68°F.
Rain is forecasted for Wednesday and Thursday.
Significant changes in temperature are expected throughout the forecast window. Maximum temperatures are forecasted between 68°F and 84.2°F, while the nighttime low will be mostly stable, as the lowest temperatures will remain in the range of 53.6°F to 59°F.
Expect the hottest day on Monday, with temperatures peaking at 84.2°F; the coldest day will be Thursday, with a maximum of 68°F.
Updated: Oct 18, 2026 @ 19:15:25 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
Today, expect plenty of sunshine and only a few scattered clouds.
Today, the highest temperature will be 82.4°F, while the lowest temperature will be 59°F.
The highest temperature will be relatively higher than the average maximum of 75.2°F in October. Today, the lowest temperature will be in line with the average low temperature.
The highest temperature will be relatively higher than the average maximum of 75.2°F in October. Today, the lowest temperature will be in line with the average low temperature.
On Sunday, in Rancho Santa Margarita, sunrise was at 6:57 am and sunset will be at 6:13 pm (PDT).
In Rancho Santa Margarita, California, the length of the day today will be 11h and 16min.
