September weather forecast
Tanque, Costa Rica

September, the first month of the autumn in Tanque, is a tropical month, with an average temperature fluctuating between 30.6°C (87.1°F) and 21.8°C (71.2°F).

Temperature

Tanque marks the onset of September with an average high-temperature of a hot 30.6°C (87.1°F), a subtle shift from August's 29.9°C (85.8°F). Throughout September in Tanque, a steady low-temperature average of 21.8°C (71.2°F) is noted.

Heat index

For most parts of September, the heat index is appraised at a scorching 41°C (105.8°F). Undertake special precautions, the probability of heat exhaustion and heat cramps is high. Prolonged activity may provoke heatstroke.
It is worth noting that heat index values are gauged for conditions in the shade and light breezes. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is an estimation of the warmth sensation when considering humidity levels. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. Under conditions of increased relative humidity, the evaporation rate lessens, causing the body to retain more heat than under less humid conditions. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.

Humidity

In September, the average relative humidity is 85%.

Rainfall

In Tanque, in September, during 27.3 rainfall days, 140mm (5.51") of precipitation is typically accumulated. Throughout the year, there are 291.8 rainfall days, and 1531mm (60.28") of precipitation is accumulated.

Daylight

The average length of the day in September is 12h and 11min.
On the first day of September in Tanque, sunrise is at 05:28 and sunset at 17:47. On the last day of the month, sunrise is at 05:26 and sunset at 17:29 CST.

Sunshine

The average sunshine in September in Tanque is 8.4h.

UV index

In Tanque, the average daily maximum UV index in September is 6. 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 average maximum UV index of 6 translates into the following recommendations:
Deflect overexposure. Sun protection is a necessity. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.