September weather forecast
Le Claire, IA

englishespañol中文
Share

Weather in September

The first month of the autumn, September, is still a warm month in Le Claire, Iowa, with an average temperature fluctuating between 56.3°F (13.5°C) and 75.4°F (24.1°C).

Temperature

The onset of September brings an average high-temperature of a still moderately hot 75.4°F (24.1°C), nearly matching the August temperature. During September, Le Claire observes a consistent average nighttime temperature of 56.3°F (13.5°C).

Humidity

In Le Claire, the average relative humidity in September is 76%.

Rainfall

In Le Claire, during September, the rain falls for 6.9 days and regularly aggregates up to 0.75" (19mm) of precipitation. Throughout the year, there are 99.4 rainfall days, and 9.57" (243mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through April, September through December. September is the first month it typically snows in Le Claire. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. Throughout the year, there are 24.5 snowfall days, and 4.09" (104mm) of snow is accumulated.

Daylight

The average length of the day in September in Le Claire, Iowa, is 12h and 28min.
On the first day of the month, sunrise is at 6:28 am and sunset at 7:34 pm. On the last day of September, sunrise is at 6:57 am and sunset at 6:44 pm CDT.

Sunshine

The average sunshine in September in Le Claire is 9.1h.

UV index

In Le Claire, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: A maximum high UV index of 4 in September translates into the following recommendations:
Ensure safety - Sun damage prevention is strongly urged. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
[Resources]

Frequently asked questions

What are September temperatures in Le Claire?

The high-temperature during September is 75.4°F (24.1°C) and the low-temperature is 56.3°F (13.5°C). The average heat index (a.k.a. 'felt air temperature', 'feels like'), which combines air temperature and relative humidity, in August is evaluated at 86°F (30°C).

What is the average humidity in September in Le Claire?

The average relative humidity in September in Le Claire, Iowa, is 76%.

How many days does it rain in September in Le Claire?

In Le Claire, in September, it is raining for 6.9 days, with typically 0.75" (19mm) of accumulated precipitation.

When does it start snowing in Le Claire?

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

How many hours of daylight does Le Claire have in September?

In Le Claire, Iowa, the average day length in September is 12h and 28min.

When are sunrise and sunset in September in Le Claire?

In September, on the first day of the month, sunrise is at 6:28 am and sunset at 7:34 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 6:44 pm CDT.

How many hours of sunshine does Le Claire have in September?

In Le Claire, Iowa, the average sunshine duration in September is 9.1h.

What is the UV index intensity in September in Le Claire?

The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate vulnerability 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
Le Claire, IA

Average temperature in September - Le Claire, IA
  • Average high temperature in September: 75.4°F

The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (28.2°F).

  • Average low temperature in September: 56.3°F

The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (15.4°F).

[Resources]

Average pressure in September
Le Claire, IA

Average pressure in September - Le Claire, IA
  • Average pressure in September: 30.02"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

[Resources]

Average wind speed in September
Le Claire, IA

Average wind speed in September - Le Claire, IA
  • Average wind speed in September: 7.8mph

The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.7mph).

[Resources]

Average humidity in September
Le Claire, IA

Average humidity in September - Le Claire, IA
  • Average humidity in September: 76%

The months with the highest relative humidity are January and July (83%).
The month with the lowest relative humidity is October (71%).

[Resources]

Average rainfall in September
Le Claire, IA

Average rainfall in September - Le Claire, IA
  • Average rainfall in September: 0.75"

The wettest month (with the highest rainfall) is May (1.61").
The driest month (with the least rainfall) is December (0.35").

[Resources]

Average rainfall days in September
Le Claire, IA

Average rainfall days in September - Le Claire, IA
  • Average rainfall days in September: 6.9 days

The month with the highest number of rainy days is May (13.4 days).
The month with the least rainy days is January (3.2 days).

[Resources]

Average snowfall in September
Le Claire, IA

Average snowfall in September - Le Claire, IA
  • Average snowfall in September: 0.04"

The month with the highest snowfall is January (1.26").
The months with the least snowfall are May, June, July and August (0").

[Resources]

Average snowfall days in September
Le Claire, IA

Average snowfall days in September - Le Claire, IA
  • Average snowfall days in September: 0.1 days

The month with the highest number of snowfall days is January (7.2 days).
The months with the least snowfall days are May, June, July and August (0 days).

[Resources]

Average daylight in September /
Average sunshine in September
Le Claire, IA

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

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in September: 9h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).

[Resources]

Average sunshine days in September
Le Claire, IA

Average sunshine days in September - Le Claire, IA
  • Average sunshine days in September: 20.9 days

The month with the most sunshine days is December (22.4 days).
The month with the least sunshine days is June (14.4 days).

[Resources]

Average UV index in September
Le Claire, IA

Average UV index in September - Le Claire, IA
  • Average UV index in September: 4

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

[Resources]

Average cloud cover in September
Le Claire, IA

Average cloud cover in September - Le Claire, IA
  • Average cloud cover in September: 31

The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 30).

[Resources]

Average visibility in September
Le Claire, IA

Average visibility in September - Le Claire, 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).

[Resources]

Le Claire, Iowa, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location