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
Harker notes an average high-temperature of a still hot 88.9°F (31.6°C) in September, hardly diverging from August. An average nighttime temperature of 75°F (23.9°C) is witnessed throughout September.Heat index
For most parts of September, the heat index is calculated to be a scorching 109.4°F (43°C). Be careful: Heat exhaustion and heat cramps are probable. Heatstroke may result from extended activity.Records show heat index calculations are tailored for shaded regions and mild winds. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'feels like' or 'real feel', is a value derived by merging air temperature with the humidity to convey how the climate feels. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. Keep it in mind, direct sunlight can augment the heat you experience, possibly pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. When there is an excess of moisture in the atmosphere, the efficiency of the evaporation process is lessened, leading to less efficient body cooling and a sensation of overheating. Inadequate heat shedding in the face of rising body temperatures hints at potential dehydration risks.
Humidity
September is the most humid month, with an average relative humidity of 79%.Rainfall
In Harker, in September, it is raining for 22.3 days, with typically 3.7" (94mm) of accumulated precipitation. Throughout the year, there are 192.1 rainfall days, and 30.24" (768mm) of precipitation is accumulated.Daylight
In Harker, the average length of the day in September is 12h and 18min.On the first day of September, sunrise is at 7:05 am and sunset at 7:44 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 7:12 pm EDT.
Sunshine
In September, the average sunshine is 8.8h.UV index
May through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the average person.Note: The average daily UV index of 7 in September transforms into the following instructions:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in September?
What is the most humid month?
What is the average humidity in September?
How many days does it rain in September?
How many hours of daylight does Harker have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Harker have in September?
What are the months with the highest UV index?
What is the UV index intensity in September?
Average temperature in September
Harker, FL
- Average high temperature in September: 88.9°F
The warmest month (with the highest average high temperature) is August (90.7°F).
The month with the lowest average high temperature is January (72.7°F).
- Average low temperature in September: 75°F
The month with the highest average low temperature is August (76.8°F).
The coldest month (with the lowest average low temperature) is January (55.6°F).
Average pressure in September
Harker, FL
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is September (29.95"Hg).
Average wind speed in September
Harker, FL
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is March (6.6mph).
The calmest month (with the lowest average wind speed) is July (4.6mph).
Average humidity in September
Harker, FL
- Average humidity in September: 79%
The month with the highest relative humidity is September (79%).
The month with the lowest relative humidity is March (70%).
Average rainfall in September
Harker, FL
- Average rainfall in September: 3.7"
The wettest month (with the highest rainfall) is August (5.75").
The driest month (with the least rainfall) is January (0.75").
Average rainfall days in September
Harker, FL
- Average rainfall days in September: 22.3 days
The month with the highest number of rainy days is July (24.7 days).
The month with the least rainy days is January (8.8 days).
Average daylight in September /
Average sunshine in September
Harker, 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 month with the most sunshine is July (Average sunshine: 10h and 42min).
The months with the least sunshine are November and December (Average sunshine: 6h and 24min).
Average sunshine days in September
Harker, FL
- Average sunshine days in September: 6.2 days
The month with the most sunshine days is January (19.4 days).
The month with the least sunshine days is July (5.1 days).
Average UV index in September
Harker, 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, November and December (UV index 5).
Average cloud cover in September
Harker, 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 March, April and May (Cloud cover 28).
Average visibility in September
Harker, 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).
Harker, Florida, USA
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