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
A minor adjustment in Allendale's average high-temperature is noted with the start of September, touching a moderately hot 84.9°F (29.4°C) from August's 89.8°F (32.1°C). Allendale records a steady low-temperature average of 68.2°F (20.1°C) during September.Heat index
In September, the heat index is computed to be a very hot 95°F (35°C). Exercise more precautions, heat cramps and heat exhaustion are potential risks. Continuous activity could precipitate heatstroke.Remember that heat index calculations are made for conditions in the shade with light wind. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a value derived by merging air temperature with the humidity to convey how the climate feels. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
Perspiration, which is the evaporation of sweat, is a primary way the human body manages and dispels excessive warmth. In the presence of abundant moisture in the atmosphere, the cooling process through evaporation is hindered, causing the body to feel excessively warm. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.
Humidity
In September, the average relative humidity is 75%.Rainfall
In Allendale, in September, it is raining for 13.9 days, with typically 1.97" (50mm) of accumulated precipitation. Throughout the year, in Allendale, there are 152.9 rainfall days, and 31.18" (792mm) of precipitation is accumulated.Snowfall
In Allendale, snow does not fall in March through December.Daylight
In September, the average length of the day is 12h and 22min.On the first day of September, sunrise is at 7:00 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 7:10 pm EDT.
Sunshine
In September, the average sunshine in Allendale is 8.4h.UV index
The average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for average individuals.Note: The maximum daily UV index of 6 in September interprets into the following recommendations:
Adopt measures and apply sun safety strategies. Shielding from skin and eye damage is necessary. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. Experience reduced UV exposure by about half when donning a wide-brim hat.
Frequently asked questions
How hot is it in Allendale in September?
What is the average humidity in September in Allendale?
How many days does it rain in September in Allendale?
When it does not snow in Allendale?
What is the average length of the day in September in Allendale?
When are sunrise and sunset in September in Allendale?
How long on average sun shines in September in Allendale?
What is the UV index intensity in September in Allendale?
Average temperature in September
Allendale, SC
- Average high temperature in September: 84.9°F
The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (55.4°F).
- Average low temperature in September: 68.2°F
The month with the highest average low temperature is July (73.2°F).
The coldest month (with the lowest average low temperature) is January (39.9°F).
Average pressure in September
Allendale, SC
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in September
Allendale, SC
- Average wind speed in September: 5.9mph
The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).
Average humidity in September
Allendale, SC
- Average humidity in September: 75%
The months with the highest relative humidity are August and December (76%).
The month with the lowest relative humidity is January (70%).
Average rainfall in September
Allendale, SC
- Average rainfall in September: 1.97"
The wettest month (with the highest rainfall) is August (3.7").
The driest month (with the least rainfall) is November (1.38").
Average rainfall days in September
Allendale, SC
- Average rainfall days in September: 13.9 days
The month with the highest number of rainy days is August (20.8 days).
The month with the least rainy days is November (6.6 days).
Average snowfall in September
Allendale, SC
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.12").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Allendale, SC
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (0.3 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Allendale, SC
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in September: 8h and 2min
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 18min).
Average sunshine days in September
Allendale, SC
- Average sunshine days in September: 14.3 days
The month with the most sunshine days is November (22.3 days).
The month with the least sunshine days is August (7.3 days).
Average UV index in September
Allendale, SC
- Average UV index in September: 6
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in September
Allendale, SC
- Average cloud cover in September: 33
The months with the most cloud cover are February and December (Cloud cover 43).
The month with the least cloud cover is October (Cloud cover 29).
Average visibility in September
Allendale, SC
- 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).
Allendale, South Carolina, USA
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