September · United States
Best time to visit Monterey in September Weather, crowds & prices
Weather in Monterey in September
Average temperature 17°C, 6 mm of rain, about 24 days with 6+ hours of sunshine and 82% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
9.3/10
Ranked #6 of 12 months
- Avg temp
- 17°C
- Rainfall
- 6 mm
- Humidity
- 82%
- Days with 6h+ sun
- 24
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$$ · Peak Season Rates ($$$)
September in Monterey scores 9.3/10 for nature and wildlife travel - an above-average month (#6 of 12). Expect around 17°C, 6 mm of rain, and roughly 24 days with 6+ hours of sunshine this month.
Monterey's aquarium, Cannery Row and coastal trail anchor California's central coast.
September ranks 6th of 12 for Monterey — one of the best windows
Temperatures hover around 17°C (62°F) — the kind of month where neither heat nor cold forces the schedule.
At just 6 mm for the month, rain will not shape your plans; you get about 24 days with 6+ hours of sunshine and 12.2 hours of daylight.
On our climate-comfort scale this is one of the strongest months of the year for Monterey at 9.3/10 (6th of 12), just behind June at 9.5/10.
Pack layers you can shed by midday plus one warm layer for the evening, footwear you can get muddy.
Expect peak pricing, and crowds are moderate.
Frequently asked
- What is the weather like in Monterey in September?
- In September, Monterey averages 17°C, 6 mm of rain, and about 24 days with 6+ hours of sunshine. Its climate-comfort score is 9.3/10.
- Is September a good time to visit Monterey?
- September earns a 9.3/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Monterey in September?
- Expect about 6 mm of rain in September. Average humidity is 82% and there are about 24 days with 6+ hours of sunshine.
Curated in Monterey
Tickets & experiences
Things to do in Monterey
Monterey, United States. Live activities and tours from GetYourGuide, matched to this destination.