20-Year Climate Average
Cabo San Lucas, Baja California Sur, Mexico Weather in September
Normal High
88°F
Normal Low
79°F
Rainy Days
~14 of the month
Chance of Rain
45%
Humidity
76%
UV index
Not available
Daylight
12.3 hours
Peak wind
12 mph
Usually good for: beaches and outdoor dining.
Based on September climate records from 2006–2025 (Open-Meteo Historical Weather Archive). These are planning averages, not a forecast. Data: Open-Meteo.com, CC BY 4.0.
Current conditions
Forecast versus the climate baseline
80°F
It currently feels like 91°F with 89% humidity, a 77°F dew point and 1 mph wind. Climate averages describe the month; this live reading is what matters for plans today.
87° / 76° · 73% rain
87° / 77° · 88% rain
90° / 78° · 92% rain
Best Months to Visit Cabo San Lucas, Baja California Sur, Mexico
Ranked by historical rainy-day frequency — the driest months over the past 20 years.
Methodology
Monthly values use the 2001–2020 observation period. Temperature, precipitation, humidity or dew point, wind, UV and daylight are shown only when the selected source provides them; unavailable fields are never estimated or silently replaced. These are planning normals, not guarantees for a specific trip.
What is the weather like in Cabo San Lucas, Baja California Sur, Mexico in September?
The 20-year average high in Cabo San Lucas, Baja California Sur, Mexico in September is 88°F, with a low around 79°F and about 14 rainy days.