Castaic Weather in September
Castaic in September sees very high daytime temperatures of 33°C (91°F) and nighttime lows of 16°C (61°F). With just 3.9 mm (0.2 in) of rainfall expected, it's a dry month overall.
Rainfall in Castaic in September
Records from the past 30 years suggest around a single day of rain, with 3.9 mm (0.2 in) average for the month. On the rare occasion it rains, expect a brief, moderate shower rather than a heavy downpour.
Temperature in Castaic in September
The temperature in Castaic in September is excellent. Daytime highs reach 33°C (91°F), with nights dropping to 16°C (61°F). It's usually most comfortable outside during the morning and later in the day. At 16°C (61°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.
Sunshine in Castaic in September
The month enjoys around 278 hours of sunshine, creating mostly sunny days with good weather conditions.If you prefer dry days with pleasant temperatures, February, March, April, May, October and November typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Castaic's climate page.
Castaic Temperature in September
Min Temperature
16°C (61°F)
Max Temperature
33°C (91°F)
Chance of Rain
2%
Precipitation
3.9 mm (0.2 in)
Rainy days
a single day
Humidity
67% *
Sunshine
278 hours *
Percentage Sunshine
75% *
Best Places in the United States of America in September
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in September →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Castaic in September
Pack for serious heat in Castaic in September. Prioritize clothing that breathes and doesn't cling or stick. Lightweight cotton, linen, and moisture-wicking fabrics are ideal. A wide hat provides welcome shade. Dry conditions mean you won't need to worry about rain protection. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Castaic in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Castaic's climate page.
Temperature Rainfall Sunshine Humidity
See the full Castaic climate overview or explore weather in the United States of America.
