September weather forecast
Sámara, Costa Rica

As September dawns in Sámara, Costa Rica, the city experiences a further slight decrease in temperature. The rainfall marks a significant peak, hitting 130mm (5.12"), further reflecting the continuation of the rainy season in the city. Interestingly, despite variable weather conditions, the sea temperature and UV index both remain persistently steady. The daylight hours see a diminutive decrease, while cloud cover ascends to a 49%. An essential peculiarity of September is the decreased winds blowing at an average of 6.9km/h (4.3mph).

Temperature

The introduction of September in Sámara sees an average high-temperature of a still moderately hot 29°C (84.2°F), hardly deviating from August. Sámara welcomes an average low temperature of 24°C (75.2°F) in September, a gentle shift from the day's high.

Heat index

In September, the heat index is calculated to be a sweltering 36°C (96.8°F). Undertake additional precautions, heat cramps and heat exhaustion could happen. Heatstroke could occur from sustained activity.
For clarity, heat index numbers account for light winds and areas under shade. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a value derived by merging air temperature with the humidity to convey how the climate feels. A person's impression of weather can be affected by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Keep aware, the sun, when shining directly, can intensify the heat experience, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
When faced with excessive heat, the human body begins to perspire, utilizing the cooling benefits of sweat evaporation. In high relative humidity, the body's ability to evaporate heat is diminished, resulting in a heightened feeling of warmth. As the body gains more heat than it can dissipate, there's a risk of increasing temperatures and resultant overheating.

Humidity

In Sámara, the average relative humidity in September is 84%.

Rainfall

In Sámara, in September, it is raining for 24.4 days, with typically 130mm (5.12") of accumulated precipitation. Throughout the year, there are 205 rainfall days, and 1087mm (42.8") of precipitation is accumulated.

Sea temperature

In Sámara, Costa Rica, the average seawater temperature in September is 28.8°C (83.8°F).
Note: Water temperatures between 25°C (77°F) and 29°C (84.2°F) are regarded as very warm, ensuring all water activities are pleasurable for extended periods without feeling uneasy.

Daylight

In Sámara, Costa Rica, the average length of the day in September is 12h and 11min.
On the first day of the month, sunrise is at 05:32 and sunset at 17:50. On the last day of September, in Sámara, sunrise is at 05:30 and sunset at 17:33 CST.

Sunshine

The average sunshine in September in Sámara is 7.9h.

UV index

The months with the highest UV index are January through December, with an average maximum UV index of 7. January through December, with an average maximum UV index of 7, are months with the lowest UV index in Sámara. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: The maximum UV index, 7 during September, leads to the following recommendations:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Stay cautious! Sand and water reflections increase UV radiation potency.