Cabo San Lucas Weather in September
September in Cabo San Lucas typically sees daytime highs of 33°C (91°F) and nighttime lows of 26°C (79°F). As the wettest month of the year, expect more rainfall than other months.
Rainfall in Cabo San Lucas in September
Being the wettest month, having an umbrella on standby can help you avoid getting caught in the rain. Climate statistics over the past 30 years suggest around 5 days of rain, with 127 mm (5 in) average for the month. Showers tend to be short but heavy rather than persistent drizzle. When it rains, it usually means it, but it doesn't last long.
Temperature in Cabo San Lucas in September
Daytime highs in Cabo San Lucas in September reach 33°C (91°F), with nights around 26°C (79°F). Indoor breaks or shaded spots can make the warmer part of the day much more comfortable. At 26°C (79°F) overnight, the heat doesn't let up much after dark. If you're staying somewhere without air conditioning, a cold shower before bed and keeping the air moving can help. Average temperatures can be deceiving; some days will be hotter. Wear breathable fabrics and drink plenty of water to stay cool.
Average water temperature in September
At 30°C (86°F), the water feels bath-warm. Fine for swimming, but those looking for a cooling swim may be a bit disappointed.September in Cabo San Lucas has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Mexico, check out our Cabo San Lucas's climate page.
Cabo San Lucas Temperature in September
Min Temperature
26°C (79°F)
Max Temperature
33°C (91°F)
Water Temperature
30°C (86°F)
Chance of Rain
17%
Precipitation
127 mm (5 in)
Rainy days
5 days
Historical weather for Cabo San Lucas in September
Browse day-by-day weather records for Cabo San Lucas spanning 36 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Cabo San Lucas historical weather extremes in September
Based on weather observations in Cabo San Lucas between 2006 and 2025, these are the recorded extremes during September.
- The hottest September day on record in Cabo San Lucas reached 37°C (99°F) (September 8, 2025).
- The coldest September day was on September 7, 2022, with a maximum of 26°C (79°F).
- Nighttime temperatures dropped to 20°C (68°F) on September 20, 2024, marking the coldest September night on record.
Best Places in Mexico in September
Find out more about the weather in Mexico and which places have the best travel conditions in this month. See all of Mexico in September →
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What to Wear in Cabo San Lucas in September
Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). High rain levels are expected, so pack waterproof gear and an umbrella or poncho. Expect water temperatures of around 30°C (86°F), which is ideal for taking a refreshing dip. Bring swimwear and consider packing a towel for drying off.What To Do in Cabo San Lucas 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 Mexico, check out our Cabo San Lucas's climate page.
Temperature Rainfall Water Temp
See the full Cabo San Lucas climate overview or explore weather in Mexico.
