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
September reports an average high-temperature of a still tropical 87.3°F (30.7°C), slightly varied from August's 90.7°F (32.6°C). Nighttime temperatures in September average to an agreeable 68°F (20°C) in Washington.Heat index
For September, the heat index is appraised at a fiery hot 102.2°F (39°C). Ensure heightened precautions, risk of heat cramps and heat exhaustion is significant. Sustained activity could provoke heatstroke.Thinking about the heat index, one should account for its values in shaded areas with gentle breezes. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', gives an indication of how one might feel in terms of heat after considering humidity. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
Normally, the human body cools itself through perspiration, which removes excessive heat by evaporating sweat. During high air temperature and humidity (high heat index), the process of perspiration is hindered, intensifying the sensation of heat. As the body gains more heat than it can dissipate, there's a risk of increasing temperatures and resultant overheating.
Humidity
In Washington, the average relative humidity in September is 76%.Rainfall
In Washington, in September, during 12.2 rainfall days, 1.22" (31mm) of precipitation is typically accumulated. Throughout the year, in Washington, Mississippi, there are 137.6 rainfall days, and 18.23" (463mm) of precipitation is accumulated.Snowfall
In Washington, snow does not fall in March through November.Daylight
The average length of the day in September is 12h and 21min.On the first day of September in Washington, sunrise is at 6:41 am and sunset at 7:28 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 6:51 pm CDT.
Sunshine
In Washington, the average sunshine in September is 9.6h.UV index
In September, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for the average person.Note: In September, a regular UV index of 6 translates into these guidelines:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September in Washington?
What is the average humidity in September in Washington?
How many days does it rain in September in Washington?
When it does not snow in Washington?
What is the average length of the day in September in Washington?
What time are sunrise and sunset in September in Washington?
How many hours of sunshine does Washington have in September?
What is the UV index intensity in September in Washington?
Average temperature in September
Washington, MS
- Average high temperature in September: 87.3°F
The warmest month (with the highest average high temperature) is July (91.2°F).
The month with the lowest average high temperature is January (55.4°F).
- Average low temperature in September: 68°F
The month with the highest average low temperature is August (73°F).
The coldest month (with the lowest average low temperature) is January (40.5°F).
Average pressure in September
Washington, 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 (29.96"Hg).
Average wind speed in September
Washington, MS
- Average wind speed in September: 5mph
The windiest month (with the highest average wind speed) is February (8mph).
The calmest months (with the lowest average wind speed) are July, August and September (5mph).
Average humidity in September
Washington, MS
- Average humidity in September: 76%
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Washington, MS
- Average rainfall in September: 1.22"
The wettest month (with the highest rainfall) is July (2.56").
The driest month (with the least rainfall) is November (0.91").
Average rainfall days in September
Washington, MS
- Average rainfall days in September: 12.2 days
The month with the highest number of rainy days is July (16.1 days).
The month with the least rainy days is November (7.1 days).
Average snowfall in September
Washington, MS
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.16").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Washington, MS
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.8 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Washington, MS
- Average daylight in September: 12h and 2min
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 4min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).
Average sunshine days in September
Washington, MS
- Average sunshine days in September: 15 days
The month with the most sunshine days is October (21.4 days).
The month with the least sunshine days is August (11 days).
Average UV index in September
Washington, MS
- 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
Washington, MS
- Average cloud cover in September: 31
The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is October (Cloud cover 28).
Average visibility in September
Washington, 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).
Washington, Mississippi, USA
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