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
The average high-temperature for September is a warm 85.3°F (29.6°C), closely aligning with the temperature of the preceding month. September notes an average low temperature of 79.3°F (26.3°C), subtly down from the daytime highs.Heat index
September's average heat index is calculated to be a torrid 95°F (35°C). Exercise heightened safety, heat cramps and heat exhaustion are probable. Persistent activity may provoke heatstroke.The metrics for the heat index are tailored for both shady environments and light winds. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'feels like' or 'real feel', quantifies the warmth felt when relative humidity is considered. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Youngsters typically face more danger than adults since they sweat less. Their larger skin surface compared to their small bodies and heightened heat production from their activities augment their vulnerability.
Perspiration is essential for the human body; it facilitates cooling through the process of sweat evaporation. Increased relative humidity interferes with body cooling by slowing the rate of evaporation, resulting in a slower body cooling rate and a heightened feeling of heat. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.
Humidity
The average relative humidity in September is 75%.Rainfall
In Haverhill, in September, it is raining for 25.9 days, with typically 8.31" (211mm) of accumulated precipitation. In Haverhill, during the entire year, the rain falls for 238.4 days and collects up to 58.82" (1494mm) 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 7:00 am and sunset at 7:40 pm. On the last day of September, sunrise is at 7:12 am and sunset at 7:07 pm EDT.
Sunshine
The average sunshine in September is 9h.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 health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: A daily maximum UV index of 7 in September translates into the following instructions:
Shun overexposure. Protection from sun ravages is indispensable. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Enhance your sun protection with tightly woven, yet airy clothing.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in September?
What is the average humidity in September in Haverhill?
How much does it rain in September?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
When is the highest UV index?
How high is the UV index in September?
Average temperature in September
Haverhill, FL
- Average high temperature in September: 85.3°F
The warmest month (with the highest average high temperature) is August (87.3°F).
The month with the lowest average high temperature is January (72.1°F).
- Average low temperature in September: 79.3°F
The month with the highest average low temperature is August (81.3°F).
The coldest month (with the lowest average low temperature) is January (63.1°F).
Average pressure in September
Haverhill, FL
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are September and October (29.96"Hg).
Average wind speed in September
Haverhill, FL
- Average wind speed in September: 8.1mph
The windiest months (with the highest average wind speed) are January and March (10.9mph).
The calmest month (with the lowest average wind speed) is July (7.3mph).
Average humidity in September
Haverhill, FL
- Average humidity in September: 75%
The months with the highest relative humidity are June and December (76%).
The month with the lowest relative humidity is March (70%).
Average rainfall in September
Haverhill, FL
- Average rainfall in September: 8.31"
The wettest month (with the highest rainfall) is August (10.04").
The driest month (with the least rainfall) is January (1.61").
Average rainfall days in September
Haverhill, FL
- Average rainfall days in September: 25.9 days
The month with the highest number of rainy days is August (27.5 days).
The month with the least rainy days is February (12.8 days).
Average daylight in September /
Average sunshine in September
Haverhill, 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: 9h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 6min).
Average sunshine days in September
Haverhill, FL
- Average sunshine days in September: 2.9 days
The months with the most sunshine days are January and March (13.3 days).
The month with the least sunshine days is July (2.1 days).
Average UV index in September
Haverhill, 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 and February (UV index 5).
Average cloud cover in September
Haverhill, FL
- Average cloud cover in September: 30
The months with the most cloud cover are November and December (Cloud cover 35).
The months with the least cloud cover are April, May and July (Cloud cover 28).
Average visibility in September
Haverhill, 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).
Haverhill, Florida, USA
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