September weather forecastNew Haven, MS
September
Weather in September
The first month of the autumn, September, is also a hot month in New Haven, Mississippi, with an average temperature ranging between min 67.3°F (19.6°C) and max 87.3°F (30.7°C).Temperature
As September unfolds, the average high-temperature reaches a still tropical 87.3°F (30.7°C), hinting at a slight fluctuation from the previous month. During the month of September, the nighttime temperature falls to an average of 67.3°F (19.6°C).Heat index
The average heat index in September is estimated at a sweltering 100.4°F (38°C). Adopt special protective actions against heat exhaustion and heat cramps. Long-duration activity risks heatstroke.The heat index's values are generally associated with conditions in shade and light breezes. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', binds temperature metrics with humidity values to give a sense of the actual warmth. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are highly critical for babies and toddlers. Kids frequently fail to realize the necessity for resting and hydrating. Thirst is an advanced indication of dehydration - hence, maintaining hydration, especially during extended physical activities, becomes essential.
The human body has a built-in cooling mechanism through perspiration; evaporating sweat dissipates the excess heat. When air moisture content is high, the cooling process through evaporation is not as efficient, leading to an ineffective body cooling process and a feeling of overheating. As body temperatures escalate without effective heat release, one might face dehydration threats.
Humidity
In New Haven, the average relative humidity in September is 75%.Rainfall
In New Haven, in September, it is raining for 14.5 days, with typically 1.85" (47mm) of accumulated precipitation. Throughout the year, there are 152.9 rainfall days, and 23.66" (601mm) of precipitation is accumulated.Snowfall
April through November are months without snowfall.Daylight
In New Haven, the average length of the day in September is 12h and 21min.On the first day of the month, sunrise is at 6:34 am and sunset at 7:21 pm. On the last day of September, in New Haven, sunrise is at 6:52 am and sunset at 6:44 pm CDT.
Sunshine
The average sunshine in September in New Haven is 9.3h.UV index
In September, the average daily maximum UV index in New Haven is 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 6 during September leads to these advisories:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
New Haven, MS
- Average high temperature in September: 87.3°F
The warmest months (with the highest average high temperature) are July and August (91.2°F).
The month with the lowest average high temperature is January (55.8°F).
- Average low temperature in September: 67.3°F
The months with the highest average low temperature are July and August (71.8°F).
The coldest month (with the lowest average low temperature) is January (38.7°F).
Average pressure in September
New Haven, MS
- Average pressure in September: 29.99"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
New Haven, MS
- Average wind speed in September: 5mph
The windiest months (with the highest average wind speed) are January and February (7.5mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).
Average humidity in September
New Haven, MS
- Average humidity in September: 75%
The month with the highest relative humidity is December (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
New Haven, MS
- Average rainfall in September: 1.85"
The wettest month (with the highest rainfall) is July (2.76").
The driest month (with the least rainfall) is November (1.22").
Average rainfall days in September
New Haven, MS
- Average rainfall days in September: 14.5 days
The month with the highest number of rainy days is July (19.8 days).
The month with the least rainy days is November (7.7 days).
Average snowfall in September
New Haven, MS
- Average snowfall in September: 0"
The month with the highest snowfall is December (0.35").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
New Haven, 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 and October (0 days).
Average daylight in September /
Average sunshine in September
New Haven, MS
- Average daylight in September: 12h and 18min
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 18min
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 54min).
Average sunshine days in September
New Haven, MS
- Average sunshine days in September: 13 days
The month with the most sunshine days is November (20.7 days).
The month with the least sunshine days is August (8.7 days).
Average UV index in September
New Haven, 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
New Haven, MS
- Average cloud cover in September: 31
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is October (Cloud cover 29).
Average visibility in September
New Haven, 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).
