Guanacaste
Costa Rica
Temperature in September

Temperature in Guanacaste in September

Guanacaste, Costa Rica, a region in Costa Rica, experiences maximum daytime temperatures in September ranging from 29°C (84°F) in Puerto Coyote to 31°C (88°F) in Nicoya. Nighttime temperatures generally drop to 23°C (73°F) in Nicoya and 25°C (77°F) in Puerto Coyote.

What is the temperature of the different cities in Guanacaste, Costa Rica in September?

Explore the map below to discover average September temperatures at the top destinations in Guanacaste. For a deeper dive, simply click on any destination dot.

Guanacaste Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in Guanacaste - and find the best time to visit. See also: Guanacaste weather by month.

January32°C (90°F) February33°C (91°F) March33°C (91°F) April33°C (91°F) May32°C (90°F) June31°C (88°F) July31°C (88°F) August31°C (88°F) September30°C (86°F) This monthOctober30°C (86°F) November30°C (86°F) December31°C (88°F)
Best Time to Visit Guanacaste →

Best Places to Visit in Guanacaste in September

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Guanacaste.

Conditions Temperatures Precipitation
Avg daytime high -5°C (23°F) cold → 32°C (90°F) hot

Marker color shows the average daytime high temperature in September: blue is cold, red is hot.

See all September weather averages, cities and regions in Guanacaste

Guanacaste temperatures in September: frequently asked questions

How hot does it get in Guanacaste, Costa Rica in September?

Expect daytime temperatures around 30°C (86°F) in Tamarindo. That makes September a very high month for Guanacaste, Costa Rica.

How cold does it get at night in Guanacaste, Costa Rica in September?

After dark, Tamarindo cools to about 25°C (77°F) on an average September night.

What is the warmest city in September in Guanacaste, Costa Rica?

According to our recent database analysis, Nicoya is the warmest city. It experiences an average maximum daytime temperature of approximately 31°C (88°F) and rarely drops below 23°C (73°F) during the night.

What is the coldest city in September in Guanacaste, Costa Rica?

According to our data, Puerto Coyote holds the title for the coldest city in Guanacaste, Costa Rica in September. It experiences maximum temperatures of approximately 29°C (84°F) and drops to lows of about 25°C (77°F) during the night.

How much sun does Guanacaste, Costa Rica get in September?

Most cities enjoy a balanced amount of sunshine, with around 158 hours of sunlight anticipated in Tamarindo. This ensures the days are neither too dim nor excessively sunny.

Interested in more climate information?

We have much more information about the climate in Guanacaste.

Weather and climate has detailed information for every country in the world. Are you going to Costa Rica? Get detailed historical weather averages for many cities in Costa Rica.

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