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
Massac's shift into September is marked by a subtle change to a moderately hot 81.7°F (27.6°C) from August's 86.9°F (30.5°C) in temperature. An average low-temperature of 61.9°F (16.6°C) is noted during the month of September.Heat index
The heat index for September is appraised at a tropical 86°F (30°C). Uninterrupted activity during exposure could lead to a sense of exhaustion, possibly causing heat cramps.Remember that heat index calculations are made for conditions in the shade with light wind. The heat index has the potential to rise by 15 Fahrenheit (8 Celsius) degrees with direct sunshine exposure.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', reflects the blend of air temperature and relative humidity to give a temperature impression. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. 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 hold particular importance for children. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
Humidity
In Massac, the average relative humidity in September is 72%.Rainfall
The month with the least rainfall is September, when the rain falls for 9 days and typically collects 0.91" (23mm) of precipitation.Snowfall
May through October are months without snowfall in Massac.Daylight
In September, the average length of the day in Massac is 12h and 25min.On the first day of the month, sunrise is at 6:26 am and sunset at 7:22 pm. On the last day of September, sunrise is at 6:49 am and sunset at 6:39 pm CDT.
Sunshine
The average sunshine in September is 9.6h.UV index
In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 5 during September leads to these advisories:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Massac in September?
What is the average humidity in September in Massac?
What is the driest month?
How much does it rain in September?
When it does not snow?
What is the average length of the day in September in Massac?
When are sunrise and sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Massac, KY
- Average high temperature in September: 81.7°F
The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is January (41.5°F).
- Average low temperature in September: 61.9°F
The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (28.4°F).
Average pressure in September
Massac, KY
- Average pressure in September: 30.03"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
Massac, KY
- Average wind speed in September: 6.3mph
The windiest month (with the highest average wind speed) is January (9mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).
Average humidity in September
Massac, KY
- Average humidity in September: 72%
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
Massac, KY
- Average rainfall in September: 0.91"
The wettest month (with the highest rainfall) is April (2.52").
The driest month (with the least rainfall) is September (0.91").
Average rainfall days in September
Massac, KY
- Average rainfall days in September: 9 days
The month with the highest number of rainy days is May (16.4 days).
The month with the least rainy days is January (8.1 days).
Average snowfall in September
Massac, KY
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.02").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Massac, KY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.8 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
Massac, KY
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 9h and 4min
The months with the most sunshine are June and July (Average sunshine: 10h and 36min).
The months with the least sunshine are January and February (Average sunshine: 4h and 42min).
Average sunshine days in September
Massac, KY
- Average sunshine days in September: 19 days
The month with the most sunshine days is October (21.3 days).
The month with the least sunshine days is May (12.8 days).
Average UV index in September
Massac, KY
- 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 January, February and December (UV index 2).
Average cloud cover in September
Massac, KY
- Average cloud cover in September: 27
The month with the most cloud cover is February (Cloud cover 50).
The months with the least cloud cover are June and September (Cloud cover 27).
Average visibility in September
Massac, KY
- 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).
Massac, Kentucky, USA
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