September weather forecast
Bartow, FL

The first month of the autumn, September, is still a hot month in Bartow, Florida, with an average temperature varying between 73.6°F (23.1°C) and 88°F (31.1°C).

Temperature

The transition into September shows a subtle variation to a still tropical 88°F (31.1°C) from August's 90°F (32.2°C) in the average high-temperature. In September, the average low-temperature is a moderately hot 73.6°F (23.1°C).

Heat index

For most parts of September, the heat index is evaluated at an extremely hot 105.8°F (41°C). Adopt special protective actions against heat exhaustion and heat cramps. Long-duration activity risks heatstroke.
Be informed that the heat index values are oriented around shady conditions and gentle breezes. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', measures the perceived warmth when incorporating the humidity present in the air. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
When the body gets too warm, it perspires, leading to sweat evaporation which cools it down. Excessive relative humidity disturbs the body's typical cooling process by reducing evaporation, leading to a decrease in body cooling rate and an increase in the sensation of warmth. When body heat isn't effectively managed, risks of dehydration and overheating amplify.

Humidity

With an average relative humidity of 80%, September is the most humid month.

Rainfall

In Bartow, in September, during 20.2 rainfall days, 1.85" (47mm) of precipitation is typically accumulated. In Bartow, during the entire year, the rain falls for 166.5 days and collects up to 19.09" (485mm) of precipitation.

Daylight

In September, the average length of the day is 12h and 19min.
On the first day of the month, sunrise is at 7:06 am and sunset at 7:47 pm. On the last day of September, sunrise is at 7:20 am and sunset at 7:14 pm EDT.

Sunshine

The average sunshine in September in Bartow is 8.7h.

UV index

The months with the highest UV index in Bartow are May through September, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for average individuals.
Note: An average maximum UV index of 7 in September leads to these recommendations:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.