September weather forecast
Comunidad, Costa Rica

The first month of the autumn, September, is also a hot month in Comunidad, Costa Rica, with temperature in the range of an average high of 30.1°C (86.2°F) and an average low of 22.9°C (73.2°F).

Temperature

September experiences an average high-temperature of a still hot 30.1°C (86.2°F), barely different from August's 30.8°C (87.4°F). An average low-temperature of 22.9°C (73.2°F) is observed in Comunidad during the September nights.

Heat index

During September, the heat index is computed to be a sweltering 39°C (102.2°F). Preventive measures are required to mitigate the risk of heat cramps and heat exhaustion. Continuous activity may precipitate heatstroke.
It is worth noting that heat index values are gauged for conditions in the shade and light breezes. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Kids frequently fail to realize the necessity for resting and hydrating. Thirst is an advanced indication of dehydration - hence, maintaining hydration, especially during extended physical activities, becomes essential.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. When relative humidity increases, the body's capacity to evaporate heat decreases, leading to a heightened sense of warmth. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.

Humidity

In September, the average relative humidity in Comunidad, Costa Rica, is 85%.

Rainfall

In Comunidad, in September, it is raining for 27.7 days, with typically 187mm (7.36") of accumulated precipitation. Throughout the year, in Comunidad, there are 188.5 rainfall days, and 1202mm (47.32") of precipitation is accumulated.

Daylight

In Comunidad, 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 17:51. On the last day of September, in Comunidad, sunrise is at 05:31 and sunset at 17:33 CST.

Sunshine

The average sunshine in September is 8.3h.

UV index

January through October and December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for the average person.
Note: The UV index of 7 during September translates into the following guidance:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.