September weather forecast
Lamoni, IA

Weather in September

September, the first month of the autumn in Lamoni, is also a moderately hot month, with an average temperature ranging between min 56.3°F (13.5°C) and max 76.1°F (24.5°C).

Temperature

In September, the average high-temperature slightly decreases from 82°F (27.8°C) in August to a still moderately hot 76.1°F (24.5°C). The average low-temperature, in September, is 56.3°F (13.5°C).

Humidity

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

Rainfall

In Lamoni, in September, it is raining for 10.5 days, with typically 2.2" (56mm) of accumulated precipitation. Throughout the year, in Lamoni, Iowa, there are 124.4 rainfall days, and 21.42" (544mm) of precipitation is accumulated.

Snowfall

In Lamoni, snow does not fall in June through September.

Daylight

In Lamoni, Iowa, the average length of the day in September is 12h and 27min.
On the first day of September, sunrise is at 6:43 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 6:59 pm CDT.

Sunshine

The average sunshine in September in Lamoni is 9.3h.

UV index

In Lamoni, 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 average individuals.
Note: The daily maximum UV index of 5 in September interpret into the following advice:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the average humidity in September in Lamoni?

The average relative humidity in September in Lamoni is 76%.

How many days does it rain in September in Lamoni?

In Lamoni, in September, it is raining for 10.5 days, with typically 2.2" (56mm) of accumulated precipitation.

When it does not snow in Lamoni?

June through September are months without snowfall in Lamoni, Iowa.

Does it snow in Lamoni in September?

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

How many hours of daylight does Lamoni have in September?

In September, the average day length in Lamoni, Iowa, is 12h and 27min.

What time are sunrise and sunset in September in Lamoni?

In September, on the first day of the month, sunrise is at 6:43 am and sunset at 7:48 pm. On the last day of the month, in Lamoni, sunrise is at 7:11 am and sunset at 6:59 pm CDT.

How long on average sun shines in September in Lamoni?

The average sunshine duration in September is 9.3h.

What is the UV index reading in September in Lamoni?

In September, the average daily maximum UV index in Lamoni, Iowa, is 5. 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 sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Lamoni, IA

Average temperature in September - Lamoni, IA
  • Average high temperature in September: 76.1°F

The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is January (30.7°F).

  • Average low temperature in September: 56.3°F

The month with the highest average low temperature is July (66.2°F).
The coldest month (with the lowest average low temperature) is January (16.9°F).

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Average pressure in September
Lamoni, IA

Average pressure in September - Lamoni, IA
  • Average pressure in September: 30.01"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

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Average wind speed in September
Lamoni, IA

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

The windiest months (with the highest average wind speed) are January, February and March (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).

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Average humidity in September
Lamoni, IA

Average humidity in September - Lamoni, IA
  • Average humidity in September: 76%

The month with the highest relative humidity is June (83%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in September
Lamoni, IA

Average rainfall in September - Lamoni, IA
  • Average rainfall in September: 2.2"

The wettest month (with the highest rainfall) is June (3.43").
The driest months (with the least rainfall) are January, February and December (0.71").

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Average rainfall days in September
Lamoni, IA

Average rainfall days in September - Lamoni, IA
  • Average rainfall days in September: 10.5 days

The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (3.8 days).

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Average snowfall in September
Lamoni, IA

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

The month with the highest snowfall is January (2.95").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Lamoni, IA

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

The month with the highest number of snowfall days is January (8.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Lamoni, IA

Average daylight in September / Average sunshine in September - Lamoni, IA
  • Average daylight in September: 12h and 27min

The month with the longest days is June (Average daylight: 15h and 2min).
The month with the shortest days is December (Average daylight: 9h and 19min).

  • Average sunshine in September: 9h and 18min

The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).

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Average sunshine days in September
Lamoni, IA

Average sunshine days in September - Lamoni, IA
  • Average sunshine days in September: 17.4 days

The month with the most sunshine days is December (21.5 days).
The month with the least sunshine days is May (11.4 days).

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Average UV index in September
Lamoni, IA

Average UV index in September - Lamoni, IA
  • 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, October, November and December (UV index 2).

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Average cloud cover in September
Lamoni, IA

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

The month with the most cloud cover is January (Cloud cover 50).
The months with the least cloud cover are July, August and September (Cloud cover 29).

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Average visibility in September
Lamoni, IA

Average visibility in September - Lamoni, 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).

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