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
Plano's transition from August to September introduces an average high-temperature of a still moderately hot 76.1°F (24.5°C), marking an insignificant variation from the 81.3°F (27.4°C). During the month of September, the nighttime temperature falls to an average of 57.7°F (14.3°C).Humidity
In September, the average relative humidity is 78%.Rainfall
In September, the rain falls for 11.5 days. Throughout September, 1.57" (40mm) of precipitation is accumulated. Throughout the year, there are 148.1 rainfall days, and 25.43" (646mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall in Plano, Indiana.Daylight
In September, the average length of the day is 12h and 26min.On the first day of the month, sunrise is at 7:15 am and sunset at 8:16 pm. On the last day of September, sunrise is at 7:42 am and sunset at 7:30 pm EDT.
Sunshine
The average sunshine in September is 8.4h.UV index
The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, the maximum UV index of 5 suggests these recommendations:
Ensure safety - Sun damage prevention is strongly urged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Plano in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
What is the average length of the day in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Plano, IN
- Average high temperature in September: 76.1°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (34.2°F).
- Average low temperature in September: 57.7°F
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (21.2°F).
Average pressure in September
Plano, IN
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Plano, IN
- Average wind speed in September: 6.5mph
The windiest month (with the highest average wind speed) is February (9.9mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).
Average humidity in September
Plano, IN
- Average humidity in September: 78%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (74%).
Average rainfall in September
Plano, IN
- Average rainfall in September: 1.57"
The wettest month (with the highest rainfall) is June (3.03").
The driest month (with the least rainfall) is February (1.5").
Average rainfall days in September
Plano, IN
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is January (7.3 days).
Average snowfall in September
Plano, IN
- Average snowfall in September: 0"
The month with the highest snowfall is December (2.24").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Plano, 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 May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Plano, IN
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in September
Plano, IN
- Average sunshine days in September: 16 days
The month with the most sunshine days is October (19.2 days).
The month with the least sunshine days is May (9.3 days).
Average UV index in September
Plano, IN
- Average UV index in September: 5
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover in September
Plano, IN
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Plano, 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).
Plano, Indiana, USA
Weather forecast for your location
2. Allow the app to use your location