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 into September shows a subtle variation to a moderately hot 81.9°F (27.7°C) from August's 86.5°F (30.3°C) in the average high-temperature. In Crystal, the average temperature during the nights of September drops to a comfortable 62.4°F (16.9°C).Heat index
For September, the heat index is appraised at a tropical 86°F (30°C). Uninterrupted exposure and activity might result in fatigue, potentially causing heat cramps.Remember that heat index calculations are made for conditions in the shade with light wind. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'real feel' or 'feels like', represents the fusion of temperature and moisture in the air to suggest how warm it feels. A person's impression of weather can be affected by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Consider the fact that direct sun exposure can influence how hot one feels, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.
Humidity
The average relative humidity in September is 73%.Rainfall
The month with the least rainfall in Crystal, Tennessee, is September, when the rain falls for 12.2 days and typically collects 1.65" (42mm) of precipitation.Snowfall
April through October are months without snowfall in Crystal.Daylight
In September, the average length of the day is 12h and 24min.On the first day of September in Crystal, sunrise is at 6:28 am and sunset at 7:24 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 6:41 pm CDT.
Sunshine
In September, the average sunshine in Crystal, Tennessee, is 9.4h.UV index
In Crystal, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: In September, a daily UV index of 5 turns into the following recommendations:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Crystal?
What is the average humidity in September in Crystal?
What is the driest month in Crystal?
How much does it rain in Crystal in September?
When it does not snow in Crystal?
How many hours of daylight does Crystal have in September?
When are sunrise and sunset in September in Crystal?
How long on average sun shines in September in Crystal?
What is the UV index intensity in September in Crystal?
Average temperature in September
Crystal, TN
- Average high temperature in September: 81.9°F
The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (43.3°F).
- Average low temperature in September: 62.4°F
The month with the highest average low temperature is July (70.3°F).
The coldest month (with the lowest average low temperature) is January (30.4°F).
Average pressure in September
Crystal, TN
- Average pressure in September: 30.02"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
Crystal, TN
- Average wind speed in September: 6.4mph
The windiest months (with the highest average wind speed) are February, March and April (9.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).
Average humidity in September
Crystal, TN
- Average humidity in September: 73%
The months with the highest relative humidity are March and May (79%).
The month with the lowest relative humidity is October (69%).
Average rainfall in September
Crystal, TN
- Average rainfall in September: 1.65"
The wettest month (with the highest rainfall) is April (4.57").
The driest month (with the least rainfall) is September (1.65").
Average rainfall days in September
Crystal, TN
- Average rainfall days in September: 12.2 days
The month with the highest number of rainy days is July (16 days).
The month with the least rainy days is November (10.1 days).
Average snowfall in September
Crystal, TN
- Average snowfall in September: 0"
The month with the highest snowfall is March (1.69").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Crystal, TN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (3.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Crystal, 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: 9h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in September
Crystal, TN
- Average sunshine days in September: 16.1 days
The month with the most sunshine days is October (19.2 days).
The month with the least sunshine days is June (12.3 days).
Average UV index in September
Crystal, TN
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are February and December (UV index 2).
Average cloud cover in September
Crystal, TN
- Average cloud cover in September: 27
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is June (Cloud cover 26).
Average visibility in September
Crystal, TN
- 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).
Crystal, Tennessee, USA
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