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
During September, Weir records an average high-temperature of a moderately hot 85.6°F (29.8°C), marking a slight divergence from August's 90.7°F (32.6°C). Throughout the month of September, Weir expects an average low of 65.8°F (18.8°C).Heat index
During September, the heat index is estimated at a sweltering 95°F (35°C). Take more caution, heat exhaustion and heat cramps may occur. Long-lasting activity may cause heatstroke.Heat index details are generally centered around shaded locations and a mild breeze. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'feels like' or 'real feel', blends air temperature and moisture content to represent the felt temperature to humans. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to 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.
To cool down, the human body relies on perspiration, a process where excessive heat is eliminated as sweat evaporates. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. Heat-related challenges, like dehydration, can be anticipated when body heat isn't managed effectively.
Humidity
In September, the average relative humidity is 73%.Rainfall
In September, in Weir, Mississippi, the rain falls for 13.5 days. Throughout September, 2.64" (67mm) of precipitation is accumulated. Throughout the year, there are 163.9 rainfall days, and 36.54" (928mm) of precipitation is accumulated.Snowfall
In Weir, snow does not fall in April through October.Daylight
In September, the average length of the day in Weir is 12h and 22min.On the first day of the month, sunrise is at 6:31 am and sunset at 7:21 pm. On the last day of September, sunrise is at 6:51 am and sunset at 6:42 pm CDT.
Sunshine
In September, the average sunshine in Weir is 9.4h.UV index
In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: In September, the maximum UV index of 5 translates into these guidelines:
Exercise prevention - Warding off sunburn is urged. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Frequently asked questions
How hot is September in Weir?
What is the average humidity in September in Weir?
How many days does it rain in September in Weir?
When it does not snow in Weir?
What is the average length of the day in September in Weir?
When are sunrise and sunset in September in Weir?
How long on average sun shines in September in Weir?
What is the UV index intensity in September in Weir?
Average temperature in September
Weir, MS
- Average high temperature in September: 85.6°F
The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (51.4°F).
- Average low temperature in September: 65.8°F
The month with the highest average low temperature is July (71.2°F).
The coldest month (with the lowest average low temperature) is January (36.1°F).
Average pressure in September
Weir, 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 (29.96"Hg).
Average wind speed in September
Weir, MS
- Average wind speed in September: 5.2mph
The windiest months (with the highest average wind speed) are February and April (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in September
Weir, MS
- Average humidity in September: 73%
The month with the highest relative humidity is December (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Weir, MS
- Average rainfall in September: 2.64"
The wettest month (with the highest rainfall) is February (3.7").
The driest month (with the least rainfall) is November (2.09").
Average rainfall days in September
Weir, MS
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is July (19.8 days).
The month with the least rainy days is November (8.9 days).
Average snowfall in September
Weir, MS
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.67").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Weir, MS
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (1.3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Weir, MS
- 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: 9h and 2min
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 48min).
Average sunshine days in September
Weir, MS
- Average sunshine days in September: 14.9 days
The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is July (9.3 days).
Average UV index in September
Weir, MS
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February and December (UV index 3).
Average cloud cover in September
Weir, MS
- Average cloud cover in September: 28
The months with the most cloud cover are February and December (Cloud cover 48).
The month with the least cloud cover is September (Cloud cover 28).
Average visibility in September
Weir, 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).
Weir, Mississippi, USA
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