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 snowfall in September
- Average snowfall 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
Harrisville observes an average high-temperature of a still tropical 87.6°F (30.9°C) in September, barely different from 91.6°F (33.1°C) in August. During the month of September, an average temperature of 67.3°F (19.6°C) is noted during the nights.Heat index
The heat index in September is appraised at a fiery hot 102.2°F (39°C). Undertake extra safety actions, heat cramps and heat exhaustion are expected. Heatstroke may result from lengthy activity.Note that heat index values are valued for light wind and location in the shade. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for 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.
Sweat evaporation plays a crucial role in cooling the human body, a process enabled by perspiration. In circumstances of high air temperature and humidity (high heat index), the body's perspiration is restricted, heightening the feeling of warmth. Rising body temperatures resulting from an imbalance in heat absorption can lead to potential thermal issues.
Humidity
In Harrisville, the average relative humidity in September is 74%.Rainfall
In Harrisville, during September, the rain falls for 13.4 days and regularly aggregates up to 1.61" (41mm) of precipitation. In Harrisville, during the entire year, the rain falls for 145.2 days and collects up to 21.73" (552mm) of precipitation.Snowfall
March through November are months without snowfall.Daylight
In Harrisville, the average length of the day in September is 12h and 21min.On the first day of September in Harrisville, Mississippi, sunrise is at 6:36 am and sunset at 7:24 pm. On the last day of the month, sunrise is at 6:54 am and sunset at 6:46 pm CDT.
Sunshine
The average sunshine in September is 9.3h.UV index
The average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index of 6 during September translates into the following directions:
Resist extreme sun exposure. Guarding against solar damage is essential. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
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?
How many days does it rain in September?
When it does not snow?
What is the average length of the day in September?
When is the sunrise / sunset in September in Harrisville?
How many hours of sunshine does Harrisville have in September?
What is the UV index reading in September?
Average temperature in September
Harrisville, MS
- Average high temperature in September: 87.6°F
The warmest months (with the highest average high temperature) are July and August (91.6°F).
The month with the lowest average high temperature is January (55°F).
- Average low temperature in September: 67.3°F
The month with the highest average low temperature is July (72.1°F).
The coldest month (with the lowest average low temperature) is January (38.7°F).
Average pressure in September
Harrisville, MS
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in September
Harrisville, MS
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is February (7.7mph).
The calmest months (with the lowest average wind speed) are July and August (4.9mph).
Average humidity in September
Harrisville, MS
- Average humidity in September: 74%
The month with the highest relative humidity is December (81%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Harrisville, MS
- Average rainfall in September: 1.61"
The wettest month (with the highest rainfall) is August (2.64").
The driest month (with the least rainfall) is November (1.34").
Average rainfall days in September
Harrisville, MS
- Average rainfall days in September: 13.4 days
The month with the highest number of rainy days is July (18.4 days).
The month with the least rainy days is October (7.4 days).
Average snowfall in September
Harrisville, MS
- Average snowfall in September: 0"
The months with the highest snowfall are January and February (0.08").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Harrisville, MS
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.7 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Harrisville, MS
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).
Average sunshine days in September
Harrisville, MS
- Average sunshine days in September: 14.6 days
The month with the most sunshine days is October (22.4 days).
The month with the least sunshine days is July (10.1 days).
Average UV index in September
Harrisville, MS
- Average UV index in September: 6
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in September
Harrisville, MS
- Average cloud cover in September: 31
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is October (Cloud cover 30).
Average visibility in September
Harrisville, MS
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, June, October, November and December (6mi).
The months with the lowest visibility are May, July, August and September (5mi).
Harrisville, Mississippi, USA
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