September weather forecastSwan Lake, MS
September
Weather in September
September, the first month of the autumn in Swan Lake, is still a warm month, with an average temperature ranging between min 66.9°F (19.4°C) and max 85.5°F (29.7°C).Temperature
Swan Lake's entry into September measures an average high-temperature of a moderately hot 85.5°F (29.7°C), closely parallel to the preceding month. In the month of September, an average of 66.9°F (19.4°C) marks the low-temperature.Heat index
In September, the average heat index is evaluated at a torrid 95°F (35°C). Undertake additional safety actions, risk of heat cramps and heat exhaustion is significant. Persistent activity may induce heatstroke.Given the heat index, its values are aligned with shaded sites and gentle winds. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'feels like' or 'real feel', unifies temperature and humidity readings to offer a comprehensive feel of warmth. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. Elevated relative humidity disrupts typical body cooling by reducing the evaporation rate, consequently decreasing the body's cooling rate and enhancing the feeling of heat. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.
Humidity
The average relative humidity in September is 71%.Rainfall
The month with the least rainfall is September, when the rain falls for 12.5 days and typically collects 1.97" (50mm) of precipitation.Snowfall
In Swan Lake, snow does not fall in April through October.Daylight
The average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 6:35 am and sunset at 7:26 pm. On the last day of September, sunrise is at 6:55 am and sunset at 6:46 pm CDT.
Sunshine
The average sunshine in September is 9.6h.UV index
The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: A maximum UV index of 5 in September translates into the following recommendations:
Make use of precautions - Suggestions to resist sunburn are communicated. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Swan Lake, MS
- Average high temperature in September: 85.5°F
The warmest month (with the highest average high temperature) is July (90°F).
The month with the lowest average high temperature is January (50.2°F).
- Average low temperature in September: 66.9°F
The month with the highest average low temperature is July (73.4°F).
The coldest month (with the lowest average low temperature) is January (36.9°F).
Average pressure in September
Swan Lake, MS
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in September
Swan Lake, MS
- Average wind speed in September: 5.8mph
The windiest month (with the highest average wind speed) is February (9.5mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in September
Swan Lake, MS
- Average humidity in September: 71%
The months with the highest relative humidity are February, March and December (78%).
The month with the lowest relative humidity is October (67%).
Average rainfall in September
Swan Lake, MS
- Average rainfall in September: 1.97"
The wettest month (with the highest rainfall) is April (4.72").
The driest month (with the least rainfall) is September (1.97").
Average rainfall days in September
Swan Lake, MS
- Average rainfall days in September: 12.5 days
The months with the highest number of rainy days are July and August (17.6 days).
The month with the least rainy days is October (9.3 days).
Average snowfall in September
Swan Lake, MS
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.91").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Swan Lake, MS
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.3 days).
The months with the least snowfall days are April, May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Swan Lake, MS
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 9h and 36min
The month with the most sunshine is June (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in September
Swan Lake, MS
- Average sunshine days in September: 14.4 days
The month with the most sunshine days is October (20.2 days).
The month with the least sunshine days is August (11.1 days).
Average UV index in September
Swan Lake, MS
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, February and December (UV index 3).
Average cloud cover in September
Swan Lake, MS
- Average cloud cover in September: 28
The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is June (Cloud cover 26).
Average visibility in September
Swan Lake, MS
- 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).
