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
The arrival of September denotes a barely perceptible change in the average high-temperatures to a still hot 88°F (31.1°C) from August's 91.9°F (33.3°C). The average low-temperature during September nights is a pleasant 71.1°F (21.7°C).Heat index
In September, the average heat index is calculated to be a blistering 104°F (40°C). Take more caution, heat exhaustion and heat cramps may occur. Long-lasting activity may cause heatstroke.Note that heat index values are valued for light wind and location in the shade. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. 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 highly critical for babies and toddlers. Kids are usually in more danger than grown-ups as they tend to sweat less. Plus, their bigger skin surface in relation to their small frames and increased heat generation due to their activity level make them more susceptible.
Perspiring is a crucial mechanism for the human body, allowing it to release excessive warmth through evaporating sweat. When relative humidity is at high levels, the evaporation rate lessens, causing the body to keep more heat than it would in less humid conditions. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.
Humidity
The average relative humidity in September in McNeill is 76%.Rainfall
In McNeill, Mississippi, in September, it is raining for 18 days, with typically 3.19" (81mm) of accumulated precipitation. Throughout the year, there are 178.7 rainfall days, and 38.62" (981mm) of precipitation is accumulated.Snowfall
January and September are months with snowfall in McNeill. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. In McNeill, during the entire year, snow falls for 0.5 days and aggregates up to 0.35" (9mm) of snow.Daylight
In September, the average length of the day is 12h and 20min.On the first day of September, sunrise is at 6:35 am and sunset at 7:21 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 6:44 pm CDT.
Sunshine
In McNeill, the average sunshine in September is 9.6h.UV index
In McNeill, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for the average person.Note: In September, the average maximum UV index of 6 translates into the following recommendations:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot in McNeill during September?
What is the average humidity in September in McNeill?
How much does it rain in McNeill in September?
When does it start snowing in McNeill?
How many hours of daylight does McNeill have in September?
When is the sunrise / sunset in September in McNeill?
How long on average sun shines in September in McNeill?
How high is the UV index in September in McNeill?
Average temperature in September
McNeill, MS
- Average high temperature in September: 88°F
The warmest month (with the highest average high temperature) is August (91.9°F).
The month with the lowest average high temperature is January (59.5°F).
- Average low temperature in September: 71.1°F
The months with the highest average low temperature are July and August (75°F).
The coldest month (with the lowest average low temperature) is January (43°F).
Average pressure in September
McNeill, MS
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The months with the lowest atmospheric pressure are June and August (29.97"Hg).
Average wind speed in September
McNeill, MS
- Average wind speed in September: 4.7mph
The windiest month (with the highest average wind speed) is April (6.6mph).
The calmest months (with the lowest average wind speed) are July and August (4.3mph).
Average humidity in September
McNeill, MS
- Average humidity in September: 76%
The month with the highest relative humidity is December (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
McNeill, MS
- Average rainfall in September: 3.19"
The wettest month (with the highest rainfall) is August (5.47").
The driest month (with the least rainfall) is November (1.81").
Average rainfall days in September
McNeill, MS
- Average rainfall days in September: 18 days
The month with the highest number of rainy days is August (22.3 days).
The month with the least rainy days is November (8.5 days).
Average snowfall in September
McNeill, MS
- Average snowfall in September: 0.04"
The month with the highest snowfall is January (0.31").
The months with the least snowfall are February, March, April, May, June, July, August, October, November and December (0").
Average snowfall days in September
McNeill, MS
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are February, March, April, May, June, July, August, October and November (0 days).
Average daylight in September /
Average sunshine in September
McNeill, MS
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in September: 9h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 48min).
The months with the least sunshine are February and December (Average sunshine: 5h and 0min).
Average sunshine days in September
McNeill, MS
- Average sunshine days in September: 9.9 days
The month with the most sunshine days is November (19 days).
The month with the least sunshine days is August (6.6 days).
Average UV index in September
McNeill, MS
- Average UV index in September: 6
The months with the highest UV index are May, 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
McNeill, MS
- Average cloud cover in September: 29
The months with the most cloud cover are February and December (Cloud cover 48).
The month with the least cloud cover is October (Cloud cover 27).
Average visibility in September
McNeill, MS
- Average visibility in September: 6mi
The months with the highest visibility are January, March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are February and December (5mi).
McNeill, Mississippi, USA
Weather forecast for your location
2. Allow the app to use your location