September weather forecast
Watertown, FL

The first month of the autumn, September, is still a tropical month in Watertown, Florida, with an average temperature ranging between max 87.8°F (31°C) and min 70.9°F (21.6°C).

Temperature

September's average high-temperature stands at a still hot 87.8°F (31°C), showing little deviation from August's 91.2°F (32.9°C). Watertown's temperature in September lowers to a consistent average of 70.9°F (21.6°C) during the nights.

Heat index

For September, the heat index is estimated at a blistering 104°F (40°C). Adopt heightened preventive measures, heat exhaustion and heat cramps are probable. Persistent activity could lead to heatstroke.
Data suggests that the heat index is set for environments in shade and with a light wind. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is an aggregate value of air's warmth and moisture to show the human-felt temperature. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
Through perspiration, the body has a natural mechanism to eliminate excessive heat via sweat evaporation. In conditions of both high temperature and humidity (a high heat index), sweating is limited and the perception of heat is enhanced. When the body is unable to balance heat gain, its temperature elevates, which may induce thermal illnesses.

Humidity

August, September and December, with an average relative humidity of 77%, are the most humid months.

Rainfall

In Watertown, during September, the rain falls for 19.9 days and regularly aggregates up to 3.07" (78mm) of precipitation. In Watertown, during the entire year, the rain falls for 176.6 days and collects up to 32.17" (817mm) of precipitation.

Daylight

In September, the average length of the day is 12h and 20min.
On the first day of the month, sunrise is at 7:07 am and sunset at 7:52 pm. On the last day of September, in Watertown, sunrise is at 7:23 am and sunset at 7:16 pm EDT.

Sunshine

In Watertown, the average sunshine in September is 8.5h.

UV index

The average daily maximum UV index in September in Watertown, Florida, is 6. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: A typical high UV index of 6 in September suggests the following recommendations:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.