September weather forecast
Fortuna, Costa Rica

September in Fortuna, Costa Rica embraces the wet season with high rainfall, closely mirroring the trend in August. The temperatures remain steady, offering a comfortable climate for inhabitants. Daylight duration begins a gradual decrease, limiting the timeframe for outdoor ventures. The UV index commences a dip, indicating a slight reduction in solar radiation. However, October promises a slightly drier climate with similar temperatures.

Temperature

The average high-temperature in September aligns with the previous month. In Fortuna, the nighttime temperature averages to an agreeable 22°C (71.6°F) during September.

Rainfall

In Fortuna, in September, it is raining for 23 days, with typically 413mm (16.26") of accumulated precipitation. Throughout the year, there are 190 rainfall days, and 3508mm (138.11") of precipitation is accumulated.

Daylight

The average length of the day in September in Fortuna is 12h and 11min.
On the first day of the month, sunrise is at 05:28 and sunset at 17:47. On the last day of September, sunrise is at 05:27 and sunset at 17:29 CST.

Sunshine

September through November, with an average of 5h of sunshine, are months with the least sunshine in Fortuna.

UV index

February through October, with an average maximum UV index of 12, are months with the highest UV index. A UV Index estimate of 11, and higher, represents an extreme threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The daily high UV index of 12 during September translates into the following recommendations:
Adopt all essential precautions. Preventing sun harm is crucial. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Reduce the risk of sunburn by avoiding prolonged exposure and using sunscreen of at least 30 SPF.