Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
Watertown's weather in September, with an average high-temperature of a still hot 87.8°F (31°C), subtly shifts from August's 91.2°F (32.9°C). September nights are marked by an average temperature drop to an agreeable 70.9°F (21.6°C).Heat index
For September, the heat index is appraised at an extremely hot 104°F (40°C). Incorporate special precautions, risk of heat exhaustion and heat cramps is substantial. Sustained activity could cause heatstroke.In terms of the heat index, values are set with light wind and shade conditions in mind. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'feels like' or 'real feel', takes into account both air temperature and humidity to illustrate what people actually feel. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. 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 crucial for babies and toddlers. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
Sweat evaporation plays a crucial role in cooling the human body, a process enabled by perspiration. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. If heat absorption isn't effectively countered by the body's cooling methods, body temperature surges, hinting at potential problems.
Humidity
August, September and December, with an average relative humidity of 77%, are the most humid months.Rainfall
In Watertown, in September, it is raining for 19.9 days, with typically 3.07" (78mm) of accumulated 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, 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 Watertown, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index of 6 during September translates into these guidelines:
Evade overexposure. Individuals with fair skin risk burning in under 20 minutes. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September?
What is the most humid month?
What is the average humidity in September in Watertown?
How many days does it rain in September?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Watertown have in September?
What is the UV index intensity in September?
Average temperature in September
Watertown, FL
- Average high temperature in September: 87.8°F
The warmest month (with the highest average high temperature) is July (91.4°F).
The month with the lowest average high temperature is January (62.6°F).
- Average low temperature in September: 70.9°F
The month with the highest average low temperature is August (74.8°F).
The coldest month (with the lowest average low temperature) is January (44.2°F).
Average pressure in September
Watertown, FL
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.98"Hg).
Average wind speed in September
Watertown, FL
- Average wind speed in September: 4.8mph
The windiest month (with the highest average wind speed) is April (6.3mph).
The calmest month (with the lowest average wind speed) is July (4.5mph).
Average humidity in September
Watertown, FL
- Average humidity in September: 77%
The months with the highest relative humidity are August, September and December (77%).
The month with the lowest relative humidity is March (70%).
Average rainfall in September
Watertown, FL
- Average rainfall in September: 3.07"
The wettest month (with the highest rainfall) is July (5.12").
The driest month (with the least rainfall) is November (1.14").
Average rainfall days in September
Watertown, FL
- Average rainfall days in September: 19.9 days
The month with the highest number of rainy days is August (27.6 days).
The month with the least rainy days is November (6.9 days).
Average daylight in September /
Average sunshine in September
Watertown, FL
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in September: 8h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in September
Watertown, FL
- Average sunshine days in September: 8.3 days
The month with the most sunshine days is November (21.9 days).
The month with the least sunshine days is August (1.8 days).
Average UV index in September
Watertown, FL
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is January (UV index 3).
Average cloud cover in September
Watertown, FL
- Average cloud cover in September: 34
The month with the most cloud cover is December (Cloud cover 40).
The month with the least cloud cover is October (Cloud cover 29).
Average visibility in September
Watertown, 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).
Watertown, Florida, USA
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