September weather forecast
Flat Iron, IN

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Weather in September

September, the first month of the autumn in Flat Iron, is also a moderately hot month, with an average temperature ranging between min 57.7°F (14.3°C) and max 76.1°F (24.5°C).

Temperature

The transition into September marks the average high-temperature at a still warm 76.1°F (24.5°C), differing minimally from August's 80.6°F (27°C). Throughout September, a steady low-temperature average of 57.7°F (14.3°C) is noted.

Humidity

In Flat Iron, the average relative humidity in September is 77%.

Rainfall

February and September are months with the least rain when the rain falls for 12.5 days and typically aggregates up to 1.38" (35mm) of rain.

Snowfall

May through October are months without snowfall.

Daylight

The average length of the day in September is 12h and 26min.
On the first day of the month, sunrise is at 7:18 am and sunset at 8:21 pm. On the last day of September, sunrise is at 7:46 am and sunset at 7:33 pm EDT.

Sunshine

The average sunshine in September is 8.8h.

UV index

In Flat Iron, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the ordinary person.
Note: The maximum UV index, 5 during September, leads to the following recommendations:
Take necessary precautions - Defending against sun damage is advocated. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.

Frequently asked questions

What is the temperature in September?

September temperatures in Flat Iron vary between a high-temperature of 76.1°F (24.5°C) and a low-temperature of 57.7°F (14.3°C). In August, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which combines relative humidity and air temperature, is computed to be 86°F (30°C).

What is the average humidity in September?

In September, the average relative humidity is 77%.

What is the driest month?

February and September are months with the least rain when the rain falls for 12.5 days and typically aggregates up to 1.38" (35mm) of rain.

How much does it rain in September?

In Flat Iron, in September, it is raining for 12.5 days, with typically 1.38" (35mm) of accumulated precipitation.

When it does not snow?

In Flat Iron, snow does not fall in May through October.

What is the average length of the day in September?

The average day length in September is 12h and 26min.

When are sunrise and sunset in September in Flat Iron?

In September, on the first day of the month, sunrise is at 7:18 am and sunset at 8:21 pm. On the last day of the month, sunrise is at 7:46 am and sunset at 7:33 pm EDT.

How many hours of sunshine does Flat Iron have in September?

In Flat Iron, Indiana, the average sunshine duration in September is 8.8h.

What is the UV index intensity in September?

In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Flat Iron, IN

Average temperature in September - Flat Iron, IN
  • Average high temperature in September: 76.1°F

The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (31.6°F).

  • Average low temperature in September: 57.7°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).

Average pressure in September
Flat Iron, IN

Average pressure in September - Flat Iron, 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
Flat Iron, IN

Average wind speed in September - Flat Iron, IN
  • Average wind speed in September: 7.1mph

The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).

Average humidity in September
Flat Iron, IN

Average humidity in September - Flat Iron, IN
  • Average humidity in September: 77%

The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).

Average rainfall in September
Flat Iron, IN

Average rainfall in September - Flat Iron, IN
  • Average rainfall in September: 1.38"

The wettest month (with the highest rainfall) is April (3.23").
The driest months (with the least rainfall) are February and September (1.38").

Average rainfall days in September
Flat Iron, IN

Average rainfall days in September - Flat Iron, IN
  • Average rainfall days in September: 12.5 days

The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is February (6.6 days).

Average snowfall in September
Flat Iron, IN

Average snowfall in September - Flat Iron, IN
  • Average snowfall in September: 0"

The month with the highest snowfall is February (2.64").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
Flat Iron, IN

Average snowfall days in September - Flat Iron, IN
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (10.6 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
Flat Iron, IN

Average daylight in September / Average sunshine in September - Flat Iron, 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 5min

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 0min).

Average sunshine days in September
Flat Iron, IN

Average sunshine days in September - Flat Iron, IN
  • Average sunshine days in September: 15.2 days

The month with the most sunshine days is November (18 days).
The month with the least sunshine days is July (9.5 days).

Average UV index in September
Flat Iron, IN

Average UV index in September - Flat Iron, IN
  • Average UV index in September: 5

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in September
Flat Iron, IN

Average cloud cover in September - Flat Iron, IN
  • Average cloud cover in September: 32

The month with the most cloud cover is January (Cloud cover 58).
The months with the least cloud cover are June, August and September (Cloud cover 32).

Average visibility in September
Flat Iron, IN

Average visibility in September - Flat Iron, 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).

Flat Iron, Indiana, USA

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