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
Union Star's weather in September involves a mild decrease in the average high-temperature, moving down slightly from August's moderately hot 85.8°F (29.9°C) to a still warm 79.7°F (26.5°C). During September, the nighttime temperature in Union Star averages to a refreshing 60.1°F (15.6°C).Humidity
In Union Star, the average relative humidity in September is 75%.Rainfall
The month with the least rainfall in Union Star is September, when the rain falls for 9.8 days and typically collects 0.51" (13mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
In Union Star, the average length of the day in September is 12h and 25min.On the first day of September, sunrise is at 6:16 am and sunset at 7:14 pm. On the last day of the month, sunrise is at 6:41 am and sunset at 6:29 pm CDT.
Sunshine
In September, the average sunshine in Union Star, Kentucky, is 8.6h.UV index
In September, the average daily maximum UV index in Union Star is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the ordinary person.Note: The average daily UV index of 5 in September transforms into the following instructions:
Exercise caution. Those with pale skin may experience burns in less than half an hour. Around midday, solar radiation is most harmful; hence, exposure should be limited. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Frequently asked questions
What are September temperatures in Union Star?
What is the average humidity in September in Union Star?
What is the driest month in Union Star?
How many days does it rain in September in Union Star?
When it does not snow in Union Star?
How many hours of daylight does Union Star have in September?
When are sunrise and sunset in September in Union Star?
How long on average sun shines in September in Union Star?
What is the UV index reading in September in Union Star?
Average temperature in September
Union Star, KY
- Average high temperature in September: 79.7°F
The warmest month (with the highest average high temperature) is July (86.9°F).
The month with the lowest average high temperature is January (39.7°F).
- Average low temperature in September: 60.1°F
The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (26.6°F).
Average pressure in September
Union Star, KY
- 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 (29.95"Hg).
Average wind speed in September
Union Star, KY
- Average wind speed in September: 5.4mph
The windiest month (with the highest average wind speed) is February (8.1mph).
The calmest months (with the lowest average wind speed) are July and August (5mph).
Average humidity in September
Union Star, KY
- Average humidity in September: 75%
The months with the highest relative humidity are February and December (80%).
The month with the lowest relative humidity is October (74%).
Average rainfall in September
Union Star, KY
- Average rainfall in September: 0.51"
The wettest month (with the highest rainfall) is April (1.73").
The driest month (with the least rainfall) is September (0.51").
Average rainfall days in September
Union Star, KY
- Average rainfall days in September: 9.8 days
The month with the highest number of rainy days is May (15.7 days).
The month with the least rainy days is October (8.1 days).
Average snowfall in September
Union Star, KY
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.79").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Union Star, KY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4.8 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
Union Star, KY
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 18min).
Average sunshine days in September
Union Star, KY
- Average sunshine days in September: 18.4 days
The month with the most sunshine days is October (21.2 days).
The month with the least sunshine days is May (12.6 days).
Average UV index in September
Union Star, KY
- 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
Union Star, KY
- Average cloud cover in September: 32
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Union Star, KY
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, June, September, October, November and December (6mi).
The months with the lowest visibility are January, May, July and August (5mi).
Union Star, Kentucky, USA
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