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 transition from August to September sees an average high-temperature of a still tropical 88°F (31.1°C), indicating a minor variance from the prior month. During the nights in September, an average low-temperature of 67.8°F (19.9°C) is observed in Grayson.Heat index
September's mean heat index is estimated at a very hot 102.2°F (39°C). More safety actions are required, heat exhaustion and heat cramps are probable. Long-term activity may precipitate heatstroke.In the scope of the heat index, its values resonate with shade and light wind conditions. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is an estimation of the warmth sensation when considering humidity levels. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. 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. Rising body temperatures resulting from an imbalance in heat absorption can lead to potential thermal issues.
Humidity
In September, the average relative humidity in Grayson is 74%.Rainfall
In Grayson, in September, during 16.2 rainfall days, 2.52" (64mm) of precipitation is typically accumulated. In Grayson, during the entire year, the rain falls for 172.1 days and collects up to 39.45" (1002mm) of precipitation.Snowfall
April through November are months without snowfall.Daylight
In September, the average length of the day in Grayson is 12h and 21min.On the first day of September, sunrise is at 6:44 am and sunset at 7:32 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 6:54 pm CDT.
Sunshine
In Grayson, Louisiana, the average sunshine in September is 9.4h.UV index
In Grayson, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for the average person.Note: A maximum high UV index of 6 in September translates into the following recommendations:
Stay clear of intense sun exposure. Solar protection is of utmost significance. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Frequently asked questions
Is it hot in Grayson during September?
What is the average humidity in September in Grayson?
How much does it rain in Grayson in September?
When it does not snow in Grayson?
How many hours of daylight does Grayson have in September?
What time are sunrise and sunset in September in Grayson?
How many hours of sunshine does Grayson have in September?
What is the UV index intensity in September in Grayson?
Average temperature in September
Grayson, LA
- Average high temperature in September: 88°F
The warmest month (with the highest average high temperature) is July (93.7°F).
The month with the lowest average high temperature is January (54.9°F).
- Average low temperature in September: 67.8°F
The month with the highest average low temperature is August (73°F).
The coldest month (with the lowest average low temperature) is January (39.6°F).
Average pressure in September
Grayson, LA
- Average pressure in September: 29.98"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
Grayson, LA
- Average wind speed in September: 4.8mph
The windiest month (with the highest average wind speed) is April (6.9mph).
The calmest months (with the lowest average wind speed) are July, August and September (4.8mph).
Average humidity in September
Grayson, LA
- Average humidity in September: 74%
The months with the highest relative humidity are February and December (82%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Grayson, LA
- Average rainfall in September: 2.52"
The wettest month (with the highest rainfall) is April (3.9").
The driest month (with the least rainfall) is November (2.4").
Average rainfall days in September
Grayson, LA
- Average rainfall days in September: 16.2 days
The month with the highest number of rainy days is August (19.3 days).
The month with the least rainy days is November (9.9 days).
Average snowfall in September
Grayson, LA
- Average snowfall in September: 0"
The months with the highest snowfall are January and February (0.31").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Grayson, LA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (1.1 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
Grayson, LA
- 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 2min
The months with the most sunshine are June and July (Average sunshine: 10h and 12min).
The month with the least sunshine is December (Average sunshine: 4h and 48min).
Average sunshine days in September
Grayson, LA
- Average sunshine days in September: 11.5 days
The month with the most sunshine days is October (19.3 days).
The month with the least sunshine days is August (9.8 days).
Average UV index in September
Grayson, LA
- 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
Grayson, LA
- Average cloud cover in September: 32
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is October (Cloud cover 29).
Average visibility in September
Grayson, LA
- Average visibility in September: 5mi
The months with the highest visibility are June, October and November (6mi).
The months with the lowest visibility are January, February, March, April, May, July, August, September and December (5mi).
Grayson, Louisiana, USA
Weather forecast for your location
2. Allow the app to use your location
