September weather forecast
Sloan, IA

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Weather in September

The first month of the autumn, September, is also a moderately hot month in Sloan, Iowa, with an average temperature ranging between min 55.4°F (13°C) and max 75.6°F (24.2°C).

Temperature

A mild shift in the average high-temperature occurs in September, reducing from 81.9°F (27.7°C) in August to a still warm 75.6°F (24.2°C). Throughout September, Sloan witnesses a consistent average low-temperature of 55.4°F (13°C).

Humidity

The average relative humidity in September is 71%.

Rainfall

In September, the rain falls for 9.7 days. Throughout September, 1.26" (32mm) of precipitation is accumulated. In Sloan, during the entire year, the rain falls for 102.3 days and collects up to 12.91" (328mm) of precipitation.

Snowfall

May through September are months without snowfall in Sloan.

Daylight

The average length of the day in September is 12h and 28min.
On the first day of the month, sunrise is at 6:51 am and sunset at 7:58 pm. On the last day of September, sunrise is at 7:21 am and sunset at 7:07 pm CDT.

Sunshine

In September, the average sunshine is 8.9h.

UV index

In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for average individuals.
Note: The maximum daily UV index of 4 during September translates into the following directions:
Exercise care. People with light skin might get burns in fewer than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Updated: Jul 18, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in September?

During September, Sloan experiences an average high-temperature of 75.6°F (24.2°C) and a low-temperature of 55.4°F (13°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which calculates the temperature value influenced by the moisture in the air, in August is estimated at 87.8°F (31°C).

What is the average humidity in September?

In September, the average relative humidity is 71%.

How many days does it rain in September?

In Sloan, in September, it is raining for 9.7 days, with typically 1.26" (32mm) of accumulated precipitation.

When it does not snow?

In Sloan, snow does not fall in May through September.

Does it snow in September?

In Sloan, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Sloan have in September?

In Sloan, the average day length in September is 12h and 28min.

What time are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:51 am and sunset at 7:58 pm. On the last day of the month, in Sloan, sunrise is at 7:21 am and sunset at 7:07 pm CDT.

How long on average sun shines in September?

In Sloan, the average sunshine duration in September is 8.9h.

How high is the UV index in September?

The average daily maximum UV index in September in Sloan is 4. A UV Index reading of 3 to 5 represents a moderate health threat from unprotected exposure to UV radiation.
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
Sloan, IA

Average temperature in September - Sloan, IA
  • Average high temperature in September: 75.6°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (27°F).

  • Average low temperature in September: 55.4°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 (13.5°F).

Average pressure in September
Sloan, IA

Average pressure in September - Sloan, IA
  • Average pressure in September: 29.99"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).

Average wind speed in September
Sloan, IA

Average wind speed in September - Sloan, IA
  • Average wind speed in September: 8.9mph

The windiest month (with the highest average wind speed) is April (11mph).
The calmest month (with the lowest average wind speed) is July (7.5mph).

Average humidity in September
Sloan, IA

Average humidity in September - Sloan, IA
  • Average humidity in September: 71%

The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is October (65%).

Average rainfall in September
Sloan, IA

Average rainfall in September - Sloan, IA
  • Average rainfall in September: 1.26"

The wettest month (with the highest rainfall) is June (1.85").
The driest months (with the least rainfall) are January and February (0.39").

Average rainfall days in September
Sloan, IA

Average rainfall days in September - Sloan, IA
  • Average rainfall days in September: 9.7 days

The month with the highest number of rainy days is June (14.6 days).
The month with the least rainy days is January (2.6 days).

Average snowfall in September
Sloan, IA

Average snowfall in September - Sloan, IA
  • Average snowfall in September: 0"

The month with the highest snowfall is January (1.77").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in September
Sloan, IA

Average snowfall days in September - Sloan, IA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (8.2 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
Sloan, IA

Average daylight in September / Average sunshine in September - Sloan, IA
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in September: 8h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).

Average sunshine days in September
Sloan, IA

Average sunshine days in September - Sloan, IA
  • Average sunshine days in September: 17.5 days

The month with the most sunshine days is January (22.6 days).
The month with the least sunshine days is June (13.1 days).

Average UV index in September
Sloan, IA

Average UV index in September - Sloan, IA
  • Average UV index in September: 4

The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).

Average cloud cover in September
Sloan, IA

Average cloud cover in September - Sloan, IA
  • Average cloud cover in September: 29

The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 25).

Average visibility in September
Sloan, IA

Average visibility in September - Sloan, IA
  • Average visibility in September: 6mi

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

Sloan, Iowa, USA

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