Temperature in Guanacaste in September

Daytime highs, nighttime lows and the warmest cities in Guanacaste, Costa Rica this 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.

Select a Month

Check the conditions for any month of the year.

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

See also: Guanacaste weather by month.

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.

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.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

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