Weather forecast for tomorrowSan Ysidro, CA
Weather forecast for tomorrow
Monday Oct 19, 2026
- 81°F
- 64°F
Mostly Sunny
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 11mphWSW 249°
- Humidity: 55%
- UV index: 6
- Sunrise: 6:55 am PDT
- Sunset: 6:10 pm PDT
- details ▼
Tomorrow, on Monday, October 19, golden sunshine will carry through the day.
The maximum temperature will be a temperate 80.6°F, while the minimum temperature will be a breezy 64.4°F.
The maximum heat index, which combines relative humidity and air temperature, is estimated at 82.4°F.
The day’s top temperature is expected to be a few degrees higher than the typical October high of 75.6°F.
Sunrise will be at 6:55 am and sunset at 6:10 pm; tomorrow's daylight will last for 11h and 16min.
The maximum temperature will be a temperate 80.6°F, while the minimum temperature will be a breezy 64.4°F.
The maximum heat index, which combines relative humidity and air temperature, is estimated at 82.4°F.
The day’s top temperature is expected to be a few degrees higher than the typical October high of 75.6°F.
Sunrise will be at 6:55 am and sunset at 6:10 pm; tomorrow's daylight will last for 11h and 16min.
Hourly overview
Hourly temperatures
Warmest period: 12 pm - 3 pm 81°C.
Coldest hour: 6 am 64°C.
Coldest hour: 6 am 64°C.
Chance of precipitation
Highest chance: 9 pm 7%.
Hourly weather forecast
- 12 am
- 70°F
- Feels like:70°F
Clear
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 3mphNNE 31°
- Humidity: 61%
- Pressure: 29.91"Hg
- Visibility: 9mi
- UV index: 0
- details ▼
- 2 am
- 68°F
- Feels like:68°F
Clear
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 4mphE 83°
- Humidity: 61%
- Pressure: 29.91"Hg
- Visibility: 9mi
- UV index: 0
- details ▼
- 4 am
- 66°F
- Feels like:66°F
Clear
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 4mphE 97°
- Humidity: 60%
- Pressure: 29.88"Hg
- Visibility: 9mi
- UV index: 0
- details ▼
- 6 am
- 64°F
- Feels like:64°F
Mostly Clear
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 3mphE 100°
- Humidity: 61%
- Pressure: 29.88"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Sunrise: 6:55 am
- 8 am
- 68°F
- Feels like:68°F
Mostly Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 3mphE 100°
- Humidity: 56%
- Pressure: 29.91"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 10 am
- 77°F
- Feels like:77°F
Mostly Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 3mphW 273°
- Humidity: 44%
- Pressure: 29.91"Hg
- Visibility: 9mi
- UV index: 3
- details ▼
- 12 pm
- 81°F
- Feels like:81°F
Mostly Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 7mphW 263°
- Humidity: 43%
- Pressure: 29.88"Hg
- Visibility: 9mi
- UV index: 6
- details ▼
- 2 pm
- 79°F
- Feels like:81°F
Mostly Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 11mphW 259°
- Humidity: 55%
- Pressure: 29.85"Hg
- Visibility: 9mi
- UV index: 5
- details ▼
- 4 pm
- 77°F
- Feels like:81°F
Mostly Sunny
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 11mphWSW 257°
- Humidity: 62%
- Pressure: 29.85"Hg
- Visibility: 10mi
- UV index: 2
- details ▼
- 6 pm
- 73°F
- Feels like:75°F
Mostly Sunny
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 7mphWSW 248°
- Humidity: 73%
- Pressure: 29.83"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Sunset: 6:10 pm
- 8 pm
- 70°F
- Feels like:72°F
Clear
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 4mphWSW 249°
- Humidity: 83%
- Pressure: 29.85"Hg
- Visibility: 7mi
- UV index: 0
- details ▼
- 10 pm
- 70°F
- Feels like:70°F
Mostly Clear
- Precip. probability: 8%
- Precipitation: 0"
- Wind: 3mphWSW 243°
- Humidity: 84%
- Pressure: 29.85"Hg
- Visibility: 5mi
- UV index: 0
- details ▼
Tomorrow, sunshine is expected.
The temperature will vary between a minimum of 64.4°F and a maximum of 80.6°F. The warmest part of the day will be at noon and 1 pm.
The high will be moderately higher than the normal maximum of 75.6°F for October. The night temperature will be also close to the standard October low of 61.2°F.
The temperature will vary between a minimum of 64.4°F and a maximum of 80.6°F. The warmest part of the day will be at noon and 1 pm.
The high will be moderately higher than the normal maximum of 75.6°F for October. The night temperature will be also close to the standard October low of 61.2°F.
Updated: Oct 18, 2026 @ 10:53:39 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
Tomorrow, a pleasant, mostly sunny outlook is in place.
Tomorrow, the maximum temperature will be 80.6°F, while the minimum temperature will be 64.4°F. The maximum heat index, which factors the actual air temperature with the relative humidity, is appraised at 82.4°F.
The highest temperature will be slightly warmer than the average maximum of 75.6°F in October. The lowest temperature will be in line with the average low of 61.2°F.
The highest temperature will be slightly warmer than the average maximum of 75.6°F in October. The lowest temperature will be in line with the average low of 61.2°F.
On Monday, in San Ysidro, sunrise will be at 6:55 am and sunset at 6:10 pm (PDT).
In San Ysidro, tomorrow, there will be 11h and 16min of daylight.
