September weather forecast
Oviedo, FL

The first month of the autumn, September, is still a tropical month in Oviedo, Florida, with an average temperature fluctuating between 74.3°F (23.5°C) and 88.3°F (31.3°C).

Temperature

The dawn of September sees an average high-temperature of a still tropical 88.3°F (31.3°C), subtly contrasting with August's 91°F (32.8°C). September in Oviedo generally records an average low-temperature of 74.3°F (23.5°C).

Heat index

The average heat index in September is calculated to be a scorching 105.8°F (41°C). Take greater precautions, heat exhaustion and heat cramps may be expected. Heatstroke could result from lengthy activity.
It is worth noting that heat index values are gauged for conditions in the shade and light breezes. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is a numerical representation of warmth when taking temperature and moisture levels into account. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.
For the human body, perspiration is the go-to method to regulate temperature, using sweat's evaporation to dissipate warmth. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry air. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

July through September, with an average relative humidity of 77%, are the most humid months.

Rainfall

In Oviedo, in September, it is raining for 14.5 days, with typically 1.14" (29mm) of accumulated precipitation. In Oviedo, during the entire year, the rain falls for 130.9 days and collects up to 12.17" (309mm) of precipitation.

Daylight

In September, the average length of the day in Oviedo is 12h and 19min.
On the first day of the month, sunrise is at 7:03 am and sunset at 7:45 pm. On the last day of September, sunrise is at 7:17 am and sunset at 7:11 pm EDT.

Sunshine

In Oviedo, the average sunshine in September is 8.9h.

UV index

The months with the highest UV index in Oviedo are May through September, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for average individuals.
Note: The UV index of 7 during September translates into the following guidance:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.