September weather forecastArno, FL
September
Weather in September
The first month of the autumn, September, is still a hot month in Arno, Florida, with an average temperature ranging between max 87.3°F (30.7°C) and min 72°F (22.2°C).Temperature
September ushers in an average high-temperature of a still hot 87.3°F (30.7°C), aligning closely with the preceding month. Arno anticipates an average minimum temperature of 72°F (22.2°C) in the month of September.Heat index
September's average heat index is estimated at a very hot 102.2°F (39°C). Apply extra caution, heat cramps and heat exhaustion could happen. Heatstroke might occur with long-duration activity.When referencing the heat index, its values are suitable for shady environments and light breezes. The heat index has the potential to rise by 15 Fahrenheit (8 Celsius) degrees with direct sunshine exposure.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is achieved by amalgamating air temperature with the relative humidity readings. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. Increased relative humidity slows down evaporation, thereby decreasing the rate of heat removal from the body, culminating in a sensation of overheating. Heat-related challenges, like dehydration, can be anticipated when body heat isn't managed effectively.
Humidity
The months with the highest humidity are August and September, with an average relative humidity of 78%.Rainfall
In Arno, Florida, in September, it is raining for 16 days, with typically 0.87" (22mm) of accumulated precipitation. In Arno, during the entire year, the rain falls for 145.8 days and collects up to 13.39" (340mm) of precipitation.Daylight
In Arno, the average length of the day in September 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, sunrise is at 7:23 am and sunset at 7:16 pm EDT.
Sunshine
In September, the average sunshine is 8.5h.UV index
In September, the average daily maximum UV index in Arno is 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, the maximum UV index of 6 suggests this advice:
Fend off overexposure. Sun protection is vital. 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. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Arno, FL
- Average high temperature in September: 87.3°F
The warmest month (with the highest average high temperature) is July (90.7°F).
The month with the lowest average high temperature is January (63.5°F).
- Average low temperature in September: 72°F
The month with the highest average low temperature is August (75°F).
The coldest month (with the lowest average low temperature) is January (45.7°F).
Average pressure in September
Arno, FL
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is September (29.97"Hg).
Average wind speed in September
Arno, FL
- Average wind speed in September: 5.1mph
The windiest month (with the highest average wind speed) is April (6.8mph).
The calmest month (with the lowest average wind speed) is July (4.8mph).
Average humidity in September
Arno, FL
- Average humidity in September: 78%
The months with the highest relative humidity are August and September (78%).
The month with the lowest relative humidity is March (71%).
Average rainfall in September
Arno, FL
- Average rainfall in September: 0.87"
The wettest months (with the highest rainfall) are July and August (2.09").
The driest months (with the least rainfall) are March and November (0.55").
Average rainfall days in September
Arno, FL
- Average rainfall days in September: 16 days
The month with the highest number of rainy days is July (21.2 days).
The month with the least rainy days is November (6.3 days).
Average daylight in September /
Average sunshine in September
Arno, FL
- Average daylight in September: 12h and 18min
The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).
- Average sunshine in September: 8h and 30min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).
Average sunshine days in September
Arno, FL
- Average sunshine days in September: 10.2 days
The month with the most sunshine days is January (22.1 days).
The month with the least sunshine days is July (6.3 days).
Average UV index in September
Arno, FL
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The months with the lowest UV index are January, February and December (UV index 4).
Average cloud cover in September
Arno, FL
- Average cloud cover in September: 33
The month with the most cloud cover is December (Cloud cover 38).
The months with the least cloud cover are May and October (Cloud cover 29).
Average visibility in September
Arno, FL
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).





