September weather forecast
Comunidad, Costa Rica

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

Temperature

Comunidad, Costa Rica, starts September with an average high-temperature of a still hot 30.1°C (86.2°F), hinting at a minimal fluctuation from August. In Comunidad, the average low-temperature during the month of September is an agreeable 22.9°C (73.2°F).

Heat index

September's heat index is appraised at a torrid 39°C (102.2°F). Implement additional cautionary measures, heat cramps and heat exhaustion could occur. Prolonged activity might induce heatstroke.
It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'feels like' or 'apparent temperature', gauges the sensation of temperature factoring in the air's moisture content. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. 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 particularly meaningful for babies and toddlers. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.
The natural cooling mechanism in humans involves perspiration, where the evaporation of sweat balances out excessive warmth. In situations of high air temperature combined with high humidity (significant heat index), the body's ability to perspire is reduced, heightening the sense of warmth. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.

Humidity

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

Rainfall

In Comunidad, in September, it is raining for 27.7 days, with typically 187mm (7.36") of accumulated precipitation. In Comunidad, Costa Rica, during the entire year, the rain falls for 188.5 days and collects up to 1202mm (47.32") of precipitation.

Daylight

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, sunrise is at 05:31 and sunset at 17:33 CST.

Sunshine

In Comunidad, the average sunshine in September is 8.3h.

UV index

The months with the highest UV index are January through October and December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: In September, the maximum UV index of 7 suggests this advice:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.