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 reveals an average high-temperature of a still moderately hot 75°F (23.9°C), mirroring a close resemblance to August. Throughout September, Shirley records an average temperature of 57.2°F (14°C) at night.Humidity
The average relative humidity in September is 78%.Rainfall
September is the month with the least rainfall in Shirley, Indiana. Rain falls for 10.4 days and accumulates 0.67" (17mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
In September, the average length of the day in Shirley is 12h and 26min.On the first day of September in Shirley, Indiana, sunrise is at 7:10 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 7:25 pm EDT.
Sunshine
In Shirley, the average sunshine in September is 8.2h.UV index
The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: A maximum UV index of 4 in September translates into the following recommendations:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Shirley in September?
What is the average humidity in September in Shirley?
What is the driest month in Shirley?
How many days does it rain in September in Shirley?
When it does not snow in Shirley?
Does it snow in Shirley in September?
How many hours of daylight does Shirley have in September?
What time are sunrise and sunset in September in Shirley?
How many hours of sunshine does Shirley have in September?
What is the UV index intensity in September in Shirley?
Average temperature in September
Shirley, IN
- Average high temperature in September: 75°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (32.9°F).
- Average low temperature in September: 57.2°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (20.8°F).
Average pressure in September
Shirley, IN
- Average pressure in September: 30.03"Hg
The months with the highest atmospheric pressure are January and November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Shirley, IN
- Average wind speed in September: 6.6mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).
Average humidity in September
Shirley, IN
- Average humidity in September: 78%
The month with the highest relative humidity is December (83%).
The month with the lowest relative humidity is October (74%).
Average rainfall in September
Shirley, IN
- Average rainfall in September: 0.67"
The wettest month (with the highest rainfall) is May (1.54").
The driest month (with the least rainfall) is September (0.67").
Average rainfall days in September
Shirley, IN
- Average rainfall days in September: 10.4 days
The month with the highest number of rainy days is May (15.8 days).
The month with the least rainy days is February (5.9 days).
Average snowfall in September
Shirley, IN
- Average snowfall in September: 0"
The month with the highest snowfall is December (1.34").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Shirley, IN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Shirley, IN
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 8h and 1min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in September
Shirley, IN
- Average sunshine days in September: 16.2 days
The months with the most sunshine days are October and November (19.8 days).
The month with the least sunshine days is May (13.1 days).
Average UV index in September
Shirley, IN
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Shirley, IN
- Average cloud cover in September: 34
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Shirley, IN
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Shirley, Indiana, USA
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