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 move into September indicates a slight reduction in the average high-temperature, down from August's hot 87.6°F (30.9°C) to a warm 82.2°F (27.9°C). During September, Saint Joseph experiences a consistent low-temperature average of 63.3°F (17.4°C).Heat index
For September, the heat index is estimated at a hot 87.8°F (31°C). If exposure and activity are sustained, they might cause a feeling of weariness, resulting in heat cramps.Factoring in the heat index, values are geared towards shaded areas with light breezes. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.
Humidity
In September, the average relative humidity in Saint Joseph is 75%.Rainfall
In September, in Saint Joseph, the rain falls for 13.3 days. Throughout September, 2.44" (62mm) of precipitation is accumulated. Throughout the year, there are 164 rainfall days, and 37.56" (954mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall in Saint Joseph.Daylight
In September, the average length of the day is 12h and 23min.On the first day of September, sunrise is at 6:23 am and sunset at 7:16 pm. On the last day of the month, sunrise is at 6:44 am and sunset at 6:34 pm CDT.
Sunshine
In Saint Joseph, the average sunshine in September is 8.7h.UV index
In Saint Joseph, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: An average UV index of 5 in September transforms into this advice:
Adopt protective measures - Suggestions to resist sunburn are offered. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
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?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Saint Joseph, TN
- Average high temperature in September: 82.2°F
The warmest month (with the highest average high temperature) is July (88.2°F).
The month with the lowest average high temperature is January (46.6°F).
- Average low temperature in September: 63.3°F
The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (32.5°F).
Average pressure in September
Saint Joseph, 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 (29.97"Hg).
Average wind speed in September
Saint Joseph, TN
- Average wind speed in September: 5.5mph
The windiest month (with the highest average wind speed) is February (8.7mph).
The calmest month (with the lowest average wind speed) is July (4.9mph).
Average humidity in September
Saint Joseph, TN
- Average humidity in September: 75%
The months with the highest relative humidity are March and December (79%).
The month with the lowest relative humidity is October (73%).
Average rainfall in September
Saint Joseph, TN
- Average rainfall in September: 2.44"
The wettest month (with the highest rainfall) is February (4.25").
The driest month (with the least rainfall) is November (2.32").
Average rainfall days in September
Saint Joseph, TN
- Average rainfall days in September: 13.3 days
The month with the highest number of rainy days is July (19 days).
The month with the least rainy days is November (9.3 days).
Average snowfall in September
Saint Joseph, TN
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.71").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Saint Joseph, TN
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (2.3 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
Saint Joseph, TN
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in September
Saint Joseph, TN
- Average sunshine days in September: 14.9 days
The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is July (9.4 days).
Average UV index in September
Saint Joseph, TN
- Average UV index in September: 5
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Saint Joseph, TN
- Average cloud cover in September: 31
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is June (Cloud cover 30).
Average visibility in September
Saint Joseph, 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).
Saint Joseph, Tennessee, USA
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