September weather forecast
Sulphur, IN

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Weather in September

The first month of the autumn, September, is also a moderately hot month in Sulphur, Indiana, with temperature in the range of an average high of 79.3°F (26.3°C) and an average low of 59.9°F (15.5°C).

Temperature

In Sulphur, the average high-temperature in September slightly decreases from a moderately hot 85.6°F (29.8°C) in August to a still warm 79.3°F (26.3°C). September's average low-temperature reading settles at a refreshing 59.9°F (15.5°C).

Humidity

In September, the average relative humidity is 75%.

Rainfall

The month with the least rainfall is September, when the rain falls for 12.5 days and typically collects 1.61" (41mm) of precipitation.

Snowfall

Months with snowfall are January through April, September through December. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. Throughout the year, in Sulphur, there are 26.8 snowfall days, and 7.91" (201mm) of snow is accumulated.

Daylight

In September, the average length of the day is 12h and 25min.
On the first day of the month, sunrise is at 7:16 am and sunset at 8:15 pm. On the last day of September, sunrise is at 7:41 am and sunset at 7:29 pm EDT.

Sunshine

In Sulphur, the average sunshine in September is 8.4h.

UV index

In Sulphur, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum daily UV index of 5 during September translates into the following directions:
Take necessary precautions - Protection from skin and eye injury is mandatory. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.

Frequently asked questions

What is the average September temperature?

In Sulphur, 79.3°F (26.3°C) is the average high-temperature and 59.9°F (15.5°C) is the average low-temperature during September. The average heat index (a.k.a. 'feels like', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, in August is appraised at 96.8°F (36°C).

What is the average humidity in September?

In September, the average relative humidity is 75%.

What is the driest month?

The month with the least rainfall is September, when the rain falls for 12.5 days and typically collects 1.61" (41mm) of precipitation.

How much does it rain in September?

In Sulphur, in September, it is raining for 12.5 days, with typically 1.61" (41mm) of accumulated precipitation.

When does it start snowing?

September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow.

What is the average length of the day in September?

In September, the average day length is 12h and 25min.

What time are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 7:16 am and sunset at 8:15 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 7:29 pm EDT.

How long on average sun shines in September?

The average sunshine duration in September is 8.4h.

What is the UV index intensity in September?

The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium health risk from unsafe 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
Sulphur, IN

Average temperature in September - Sulphur, IN
  • Average high temperature in September: 79.3°F

The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (38.8°F).

  • Average low temperature in September: 59.9°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 (25.7°F).

Average pressure in September
Sulphur, IN

Average pressure in September - Sulphur, IN
  • 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
Sulphur, IN

Average wind speed in September - Sulphur, IN
  • Average wind speed in September: 5.3mph

The windiest months (with the highest average wind speed) are January and February (7.7mph).
The calmest months (with the lowest average wind speed) are July and August (4.8mph).

Average humidity in September
Sulphur, IN

Average humidity in September - Sulphur, IN
  • 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
Sulphur, IN

Average rainfall in September - Sulphur, IN
  • Average rainfall in September: 1.61"

The wettest month (with the highest rainfall) is April (3.31").
The driest month (with the least rainfall) is September (1.61").

Average rainfall days in September
Sulphur, IN

Average rainfall days in September - Sulphur, IN
  • Average rainfall days in September: 12.5 days

The month with the highest number of rainy days is May (18.7 days).
The month with the least rainy days is November (9.8 days).

Average snowfall in September
Sulphur, IN

Average snowfall in September - Sulphur, IN
  • Average snowfall in September: 0.04"

The month with the highest snowfall is January (2.24").
The months with the least snowfall are May, June, July and August (0").

Average snowfall days in September
Sulphur, IN

Average snowfall days in September - Sulphur, IN
  • Average snowfall days in September: 0.1 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 and August (0 days).

Average daylight in September /
Average sunshine in September
Sulphur, IN

Average daylight in September / Average sunshine in September - Sulphur, IN
  • 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 2min

The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is December (Average sunshine: 4h and 24min).

Average sunshine days in September
Sulphur, IN

Average sunshine days in September - Sulphur, IN
  • Average sunshine days in September: 14.8 days

The month with the most sunshine days is October (19.1 days).
The month with the least sunshine days is May (11.1 days).

Average UV index in September
Sulphur, IN

Average UV index in September - Sulphur, IN
  • 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, November and December (UV index 2).

Average cloud cover in September
Sulphur, IN

Average cloud cover in September - Sulphur, IN
  • Average cloud cover in September: 32

The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 29).

Average visibility in September
Sulphur, IN

Average visibility in September - Sulphur, IN
  • Average visibility in September: 5mi

The months with the highest visibility are March, April, June, August, October and November (6mi).
The months with the lowest visibility are January, February, May, July, September and December (5mi).

Sulphur, Indiana, USA

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