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
Keri's transition from August to September introduces an average high-temperature of a still tropical 88.3°F (31.3°C), marking an insignificant variation from the 90.1°F (32.3°C). The temperature dips to an average of 74.3°F (23.5°C) during September nights.Heat index
The heat index value for September is appraised at a blistering 107.6°F (42°C). Greater safety measures are needed, risk of heat exhaustion and heat cramps is high. Continuous activity might trigger heatstroke.Realize that the values for the heat index are set for shaded places and light winds. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', arises from combining readings of air temperature and relative moisture content. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. 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 miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
Perspiration, followed by sweat evaporation, is the human body's chief method to maintain a balanced temperature. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. The body is at risk of dehydration and related complications when it fails to shed excessive heat.
Humidity
With an average relative humidity of 80%, September is the most humid month.Rainfall
In Keri, in September, it is raining for 19.7 days, with typically 1.81" (46mm) of accumulated precipitation. In Keri, during the entire year, the rain falls for 161.1 days and collects up to 17.6" (447mm) of precipitation.Daylight
The average length of the day in September is 12h and 18min.On the first day of the month, sunrise is at 7:05 am and sunset at 7:45 pm. On the last day of September, in Keri, Florida, sunrise is at 7:17 am and sunset at 7:12 pm EDT.
Sunshine
In Keri, the average sunshine in September is 8.8h.UV index
The months with the highest UV index are May through September, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum UV index of 7 during September translates into these guidelines:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Frequently asked questions
How hot does it get in Keri in September?
What is the most humid month in Keri?
What is the average humidity in September in Keri?
How many days does it rain in September in Keri?
What is the average length of the day in September in Keri?
When is the sunrise / sunset in September in Keri?
How long on average sun shines in September in Keri?
What is the month with the highest UV index in Keri?
How high is the UV index in September in Keri?
Average temperature in September
Keri, FL
- Average high temperature in September: 88.3°F
The warmest months (with the highest average high temperature) are July and August (90.1°F).
The month with the lowest average high temperature is January (72.3°F).
- Average low temperature in September: 74.3°F
The month with the highest average low temperature is August (76.1°F).
The coldest month (with the lowest average low temperature) is January (54.3°F).
Average pressure in September
Keri, FL
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is September (29.95"Hg).
Average wind speed in September
Keri, FL
- Average wind speed in September: 5.1mph
The windiest month (with the highest average wind speed) is March (6.6mph).
The calmest month (with the lowest average wind speed) is July (4.4mph).
Average humidity in September
Keri, FL
- Average humidity in September: 80%
The month with the highest relative humidity is September (80%).
The month with the lowest relative humidity is March (70%).
Average rainfall in September
Keri, FL
- Average rainfall in September: 1.81"
The wettest month (with the highest rainfall) is August (3.46").
The driest month (with the least rainfall) is March (0.43").
Average rainfall days in September
Keri, FL
- Average rainfall days in September: 19.7 days
The month with the highest number of rainy days is August (22.4 days).
The month with the least rainy days is January (6.3 days).
Average daylight in September /
Average sunshine in September
Keri, FL
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 13h and 48min).
The month with the shortest days is December (Average daylight: 10h and 30min).
- Average sunshine in September: 8h and 5min
The months with the most sunshine are May and July (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 6h and 18min).
Average sunshine days in September
Keri, FL
- Average sunshine days in September: 7.7 days
The month with the most sunshine days is January (23 days).
The month with the least sunshine days is August (5.8 days).
Average UV index in September
Keri, FL
- Average UV index in September: 7
The months with the highest UV index are May, June, July, August and September (UV index 7).
The months with the lowest UV index are January, February and December (UV index 5).
Average cloud cover in September
Keri, FL
- Average cloud cover in September: 33
The months with the most cloud cover are January, September and December (Cloud cover 33).
The months with the least cloud cover are April and May (Cloud cover 28).
Average visibility in September
Keri, 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).
Keri, Florida, USA
Weather forecast for your location
2. Allow the app to use your location
