UTC Offset
UTC-07:00
Castaic, United States Snapshot 2026
Where is Castaic?
Castaic, United States
- Continent
- Americas
- Country
- United States
- City
- Castaic
- Population
- 19K
- Elevation
- 374 m
- Coordinates
- 34.49°, -118.62°
Castaic is a city in United States with a population of approximately 19K. Average temperatures range from 5°C (41°F) in January to 35°C (94°F) in August. The best time to visit is April, May, June, September, October. The city sits at an elevation of 374 m above sea level.
Time in Castaic right now
Open full time & time zone page 14:55 55
Monday, June 15, 2026
IANA time zone
America/Los_Angeles
Daylight saving
DST in effect
PST / PDT
Next DST change
November 1
backward -1h
Live weather in Castaic
Daylight in Castaic today
View full sunrise & sunset page Sunrise
Sunset
Day length
14h 27m
Climate normals for Castaic
Long-term monthly averages based on historical data.
January
Fair 
February
Fair March
Good April best
Excellent May best
Excellent June best
Excellent July
Good August
Good September best
Excellent October best
Excellent November
Good December
Fair 
| Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 17°C / 5°C | 15°C / 2°C | 6days (73 mm) Good | 8.1h Good | 66% Muggy | 3.7 Moderate | Fair | View Details |
| February | 19°C / 6°C | 16°C / 3°C | 6days (71 mm) Good | 9h Good | 61% Muggy | 4.2 Moderate | Fair | View Details |
| March | 20°C / 7°C | 18°C / 5°C | 9days (69 mm) Wet | 10.1h Excellent | 66% Muggy | 5.8 High | Good | View Details |
| April best | 25°C / 10°C | 23°C / 8°C | 3days (19 mm) Excellent | 11.8h Excellent | 56% Moderate | 7.1 Very High | Excellent | View Details |
| May best | 26°C / 13°C | 26°C / 12°C | 3days (11 mm) Excellent | 12.7h Excellent | 59% Moderate | 7.9 Very High | Excellent | View Details |
| June best | 31°C / 17°C | 32°C / 17°C | 1days (2 mm) Excellent | 13.4h Excellent | 52% Moderate | 8.4 Very High | Excellent | View Details |
| July | 34°C / 20°C | 35°C / 22°C | 0days (1 mm) Excellent | 13.3h Excellent | 48% Moderate | 8.5 Very High | Good | View Details |
| August | 35°C / 21°C | 35°C / 22°C | 1days (9 mm) Excellent | 12.3h Excellent | 47% Moderate | 8 Very High | Good | View Details |
| September best | 32°C / 18°C | 32°C / 19°C | 2days (11 mm) Excellent | 11.4h Excellent | 51% Moderate | 7.1 Very High | Excellent | View Details |
| October best | 28°C / 14°C | 27°C / 12°C | 2days (12 mm) Excellent | 10.3h Excellent | 46% Moderate | 5.6 High | Excellent | View Details |
| November | 23°C / 9°C | 19°C / 6°C | 3days (31 mm) Excellent | 8.9h Good | 51% Moderate | 4 Moderate | Good | View Details |
| December | 18°C / 6°C | 16°C / 3°C | 6days (67 mm) Good | 7.7h Good | 60% Moderate | 3.3 Moderate | Fair | View Details |
Monthly Temperatures
HighLow
Line chart showing monthly temperatures. Jan: 17°C / 5°C . Feb: 19°C / 6°C . Mar: 20°C / 7°C . Apr: 25°C / 10°C . May: 26°C / 13°C . Jun: 31°C / 17°C . Jul: 34°C / 20°C . Aug: 35°C / 21°C . Sep: 32°C / 18°C . Oct: 28°C / 14°C . Nov: 23°C / 9°C . Dec: 18°C / 6°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 73 mm. Feb: 71 mm. Mar: 69 mm. Apr: 19 mm. May: 11 mm. Jun: 2 mm. Jul: 1 mm. Aug: 9 mm. Sep: 11 mm. Oct: 12 mm. Nov: 31 mm. Dec: 67 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 66%. Feb: 61%. Mar: 66%. Apr: 56%. May: 59%. Jun: 52%. Jul: 48%. Aug: 47%. Sep: 51%. Oct: 46%. Nov: 51%. Dec: 60%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 15 km/h . Feb: 16 km/h . Mar: 16 km/h . Apr: 16 km/h . May: 16 km/h . Jun: 16 km/h . Jul: 16 km/h . Aug: 15 km/h . Sep: 14 km/h . Oct: 14 km/h . Nov: 14 km/h . Dec: 14 km/h .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 4. Feb: UV 4. Mar: UV 6. Apr: UV 7. May: UV 8. Jun: UV 8. Jul: UV 9. Aug: UV 8. Sep: UV 7. Oct: UV 6. Nov: UV 4. Dec: UV 3.
Frequently Asked Questions
Castaic has a population of approximately 19K.
The best months to visit Castaic are April, May, June, September, October, when temperatures are pleasant and rainfall is lower.
Castaic receives approximately 376mm of rainfall annually across 42 rainy days.
Castaic is located in United States, in the Americas region.
Castaic sits at an elevation of 374 m (1,227 ft) above sea level.