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 arrival of September signals a subtle shift in temperature, down from 84.7°F (29.3°C) in August to a still moderately hot 78.8°F (26°C). Throughout the month of September, Grimsley reports a steady low-temperature average of 58.1°F (14.5°C).Humidity
The average relative humidity in September in Grimsley is 78%.Rainfall
September is the month with the least rainfall. Rain falls for 13.4 days and accumulates 2.32" (59mm) of precipitation.Snowfall
In Grimsley, snow does not fall in May through September.Daylight
In Grimsley, the average length of the day in September is 12h and 24min.On the first day of the month, sunrise is at 6:12 am and sunset at 7:07 pm. On the last day of September, sunrise is at 6:34 am and sunset at 6:24 pm CDT.
Sunshine
The average sunshine in September in Grimsley is 7.9h.UV index
In Grimsley, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: A maximum high UV index of 5 in September translates into the following recommendations:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Frequently asked questions
What are September temperatures in Grimsley?
What is the average humidity in September in Grimsley?
What is the driest month in Grimsley?
How many days does it rain in September in Grimsley?
When it does not snow in Grimsley?
Does it snow in Grimsley in September?
What is the average length of the day in September in Grimsley?
When is the sunrise / sunset in September in Grimsley?
How many hours of sunshine does Grimsley have in September?
What is the UV index reading in September in Grimsley?
Average temperature in September
Grimsley, TN
- Average high temperature in September: 78.8°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (41.7°F).
- Average low temperature in September: 58.1°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (27.7°F).
Average pressure in September
Grimsley, TN
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in September
Grimsley, TN
- Average wind speed in September: 4.3mph
The windiest month (with the highest average wind speed) is February (7.3mph).
The calmest month (with the lowest average wind speed) is August (4mph).
Average humidity in September
Grimsley, TN
- Average humidity in September: 78%
The month with the highest relative humidity is December (81%).
The months with the lowest relative humidity are April, June, August, October and November (77%).
Average rainfall in September
Grimsley, TN
- Average rainfall in September: 2.32"
The wettest month (with the highest rainfall) is February (4.13").
The driest month (with the least rainfall) is September (2.32").
Average rainfall days in September
Grimsley, TN
- Average rainfall days in September: 13.4 days
The month with the highest number of rainy days is July (18.2 days).
The month with the least rainy days is November (10.4 days).
Average snowfall in September
Grimsley, TN
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.94").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Grimsley, TN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Grimsley, TN
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 7h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).
Average sunshine days in September
Grimsley, TN
- Average sunshine days in September: 14.1 days
The month with the most sunshine days is October (18 days).
The month with the least sunshine days is July (10.5 days).
Average UV index in September
Grimsley, TN
- Average UV index in September: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in September
Grimsley, TN
- Average cloud cover in September: 36
The month with the most cloud cover is February (Cloud cover 57).
The month with the least cloud cover is June (Cloud cover 32).
Average visibility in September
Grimsley, TN
- Average visibility in September: 5mi
The months with the highest visibility are April and November (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October and December (5mi).
Grimsley, Tennessee, USA
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