San Gerardo Weather in September

In San Gerardo, September brings high daytime temperatures around 27°C (81°F), with nights cooling to 20°C (68°F). This month falls within the rainy season, so expect frequent rainfall.

Rainfall in San Gerardo in September

As part of the rainy season, San Gerardo sees around 23 days of rain in September, with an average of 331 mm (13 in). Rainy season showers tend to be fairly substantial. A good rain jacket or umbrella is worth having with you most days.

Temperature in San Gerardo in September

September in San Gerardo brings typical temperatures with highs around 27°C (81°F) and lows of 20°C (68°F). This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. Nights drop to around 20°C (68°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.

Sunshine in San Gerardo in September

The area enjoys a moderate level of sunlight, with around 159 hours. It's a good balance between sunny and rainy days.

If you prefer dry days with pleasant temperatures, September may not be the ideal month to visit San Gerardo. Our weather planner can help you explore destinations with more pleasant weather conditions.

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For a detailed overview over the year and the best time to visit Costa Rica, check out our San Gerardo's climate page.

San Gerardo Temperature in September

Min Temperature 20°C (68°F)  

Max Temperature 27°C (81°F)  

Chance of Rain 78%  

Precipitation 331 mm (13 in)  

Rainy days 23 days  

Sunshine 159 hours *  

Percentage Sunshine *  

* Data from: Puntarenas, Costa Rica (48 KM, 29 Miles).

What to Wear in San Gerardo 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). Also bring a poncho, it will rain a lot! Waterproof everything you can. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.

What To Do in San Gerardo in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

7/10

Cycling

7/10

Walking

7/10

Camping

6/10

Outdoor sports

7/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Costa Rica, check out our San Gerardo's climate page.

More climate data for San Gerardo

Temperature Rainfall Sunshine

See the full San Gerardo climate overview or explore weather in Costa Rica.