Montaña Grande Weather in September

September in Montaña Grande sees daytime temperatures around 29°C (84°F) and lows of 25°C (77°F) at night. Being part of the rainy season, heavy rainfall is a regular part of the day, so pack accordingly.

Rainfall in Montaña Grande in September

As part of the rainy season, Montaña Grande sees around 23 days of rain in September, with an average of 358 mm (14 in). The rain this month falls heavily when it arrives. Late afternoons in particular can see strong showers, so waterproofs are worth keeping handy.

Temperature in Montaña Grande in September

In September, Montaña Grande gets high temperatures, with highs of 29°C (84°F). Nights cool to around 25°C (77°F). This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. Nights are warm at 25°C (77°F). It's worth making sure your accommodation has decent ventilation or air conditioning.

Sunshine in Montaña Grande in September

With about 159 hours of sunshine, the area enjoys a nice balance of sun and rainy moments, creating a pleasant environment.

Wind Speed in Montaña Grande in September

September has wind speeds averaging 1 m/s (2 knots). You can expect very gentle conditions with light air movement on typical days. Since this is an average, daily weather varies from perfectly still moments to some breezier days.

If you prefer dry days with pleasant temperatures, September may not be the ideal month to visit Montaña Grande. 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 Montaña Grande's climate page.

Montaña Grande Temperature in September

Min Temperature 25°C (77°F)  

Max Temperature 29°C (84°F)  

Chance of Rain 75%  

Precipitation 358 mm (14 in)  

Rainy days 23 days  

Windspeed 1 m/s (2 knots) *  

Sunshine 159 hours *  

Percentage Sunshine *  

* Data from: Puntarenas, Costa Rica (23 KM, 14 Miles).

What to Wear in Montaña Grande 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. Bring sunglasses since you'll have some sunny periods throughout the month

What To Do in Montaña Grande 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 Montaña Grande's climate page.

More climate data for Montaña Grande

Temperature Rainfall Sunshine Wind Speed

See the full Montaña Grande climate overview or explore weather in Costa Rica.