Big Sur Weather in September
Big Sur in September sees high temperatures, with highs around 23°C (73°F) and overnight lows of 13°C (55°F). With just 3.1 mm (0.1 in) of rainfall on average, rain is rarely an issue.
Rainfall in Big Sur in September
On average, there are about a single day with rain during this month, averaging 3.1 mm (0.1 in). If rain does fall, it tends to be very light and barely worth getting out an umbrella for.
Temperature in Big Sur in September
The temperature in Big Sur in September is excellent. Daytime highs reach 23°C (73°F), with nights dropping to 13°C (55°F). September is typically considered a summer month. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. With overnight lows of 13°C (55°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep. On average, it sees the highest temps of the year.Our weather planner can help you find worldwide destinations with pleasant weather during this period. May, June, July, August, September and October typically offer the best weather for Big Sur.
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 Big Sur's climate page.
Big Sur Temperature in September
Min Temperature
13°C (55°F)
Max Temperature
23°C (73°F)
Chance of Rain
3%
Precipitation
3.1 mm (0.1 in)
Rainy days
a single day
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Big Sur typically stay consistent throughout September, with daily highs averaging around 23°C (73°F). Nights are cool, with lows around 12°C (54°F).
Average temperatures in September
Historical weather for Big Sur in September
Browse day-by-day weather records for Big Sur spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Big Sur historical weather extremes in September
Based on 28 years of weather observations (1997-2025), these are the most extreme conditions recorded in Big Sur.
- Big Sur recorded its highest September temperature of 38°C (100°F) on September 2, 2017.
- The lowest daytime temperature in September was 15°C (59°F), recorded on September 26, 2012.
- Nighttime temperatures dropped to 7°C (45°F) on September 24, 2005, marking the coldest September night on record.
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 Big Sur in September
Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Dry conditions mean you won't need to worry about rain protection.What To Do in Big Sur 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 Big Sur's climate page.
See the full Big Sur climate overview or explore weather in the United States of America.
