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
Grimes greets September with an average high-temperature of a still hot 86.9°F (30.5°C), marking a slight deviation from the preceding month. Grimes throughout September, experiences an average nighttime temperature of 69.6°F (20.9°C).Heat index
For September, the heat index is computed to be a sweltering 98.6°F (37°C). Take more safety measures, heat exhaustion and heat cramps are potential outcomes. Persistent activity might lead to heatstroke.Note that heat index values are valued for light wind and location in the shade. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', reflects the blend of air temperature and relative humidity to give a temperature impression. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.
The human body has a built-in cooling mechanism through perspiration; evaporating sweat dissipates the excess heat. In circumstances of high air temperature and humidity (high heat index), the body's perspiration is restricted, heightening the feeling of warmth. The body is at risk of dehydration and related complications when it fails to shed excessive heat.
Humidity
In Grimes, the average relative humidity in September is 73%.Rainfall
In Grimes, in September, during 13.7 rainfall days, 1.38" (35mm) of precipitation is typically accumulated. In Grimes, during the entire year, the rain falls for 151.6 days and collects up to 23.27" (591mm) of precipitation.Snowfall
In Grimes, snow does not fall in April through December.Daylight
In Grimes, the average length of the day in September is 12h and 21min.On the first day of September, sunrise is at 6:18 am and sunset at 7:04 pm. On the last day of the month, sunrise is at 6:35 am and sunset at 6:27 pm CDT.
Sunshine
The average sunshine in September is 8.8h.UV index
The average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index, 6 during September, leads to the following recommendations:
Persist in precautions and follow sun safety policies. Keeping sunburn at bay is imperative. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot during September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
What is the average length of the day in September in Grimes?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Grimes, AL
- Average high temperature in September: 86.9°F
The warmest month (with the highest average high temperature) is July (90.9°F).
The month with the lowest average high temperature is January (57.7°F).
- Average low temperature in September: 69.6°F
The months with the highest average low temperature are July and August (73.6°F).
The coldest month (with the lowest average low temperature) is January (41.5°F).
Average pressure in September
Grimes, AL
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June and August (29.98"Hg).
Average wind speed in September
Grimes, AL
- Average wind speed in September: 5.6mph
The windiest month (with the highest average wind speed) is January (7.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).
Average humidity in September
Grimes, AL
- Average humidity in September: 73%
The months with the highest relative humidity are August and December (75%).
The months with the lowest relative humidity are May and October (69%).
Average rainfall in September
Grimes, AL
- Average rainfall in September: 1.38"
The wettest month (with the highest rainfall) is August (3.43").
The driest month (with the least rainfall) is November (1.22").
Average rainfall days in September
Grimes, AL
- Average rainfall days in September: 13.7 days
The month with the highest number of rainy days is August (20.7 days).
The month with the least rainy days is November (7.2 days).
Average snowfall in September
Grimes, AL
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.16").
The months with the least snowfall are April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Grimes, AL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Grimes, AL
- 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 12min).
- Average sunshine in September: 8h and 5min
The months with the most sunshine are June and July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 18min).
Average sunshine days in September
Grimes, AL
- Average sunshine days in September: 13.4 days
The months with the most sunshine days are October and November (21.1 days).
The month with the least sunshine days is August (7.2 days).
Average UV index in September
Grimes, AL
- Average UV index in September: 6
The months with the highest UV index are May, 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
Grimes, AL
- Average cloud cover in September: 29
The months with the most cloud cover are February and December (Cloud cover 42).
The month with the least cloud cover is October (Cloud cover 27).
Average visibility in September
Grimes, AL
- 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).
Grimes, Alabama, USA
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