September weather forecast
Geneva, IA

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Weather in September

September, the first month of the autumn in Geneva, is also an agreeable month, with an average temperature varying between 54.3°F (12.4°C) and 72.5°F (22.5°C).

Temperature

September reveals a small adjustment in temperature, transitioning from an average high of a moderately hot 78.3°F (25.7°C) in August to an agreeable 72.5°F (22.5°C). Throughout September, the temperature tends to fall to a consistent average low of 54.3°F (12.4°C).

Humidity

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

Rainfall

In Geneva, Iowa, in September, it is raining for 12.5 days, with typically 2.56" (65mm) of accumulated precipitation. Throughout the year, there are 146.2 rainfall days, and 29.69" (754mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall in Geneva.

Daylight

The average length of the day in September is 12h and 29min.
On the first day of the month, sunrise is at 6:38 am and sunset at 7:46 pm. On the last day of September, sunrise is at 7:09 am and sunset at 6:55 pm CDT.

Sunshine

The average sunshine in September is 9.2h.

UV index

In Geneva, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In September, a daily UV index of 4 turns into the following recommendations:
Take necessary precautions - Protection from skin and eye injury is mandatory. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. 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.

Frequently asked questions

What is the average September temperature?

September temperatures vary between a high-temperature of 72.5°F (22.5°C) and a low-temperature of 54.3°F (12.4°C).

What is the average humidity in September?

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

How much does it rain in September?

In Geneva, in September, it is raining for 12.5 days, with typically 2.56" (65mm) of accumulated precipitation.

When it does not snow?

June through September are months without snowfall.

Does it snow in September?

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

How many hours of daylight does Geneva have in September?

The average day length in September is 12h and 29min.

When are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:38 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 6:55 pm CDT.

How long on average sun shines in September in Geneva?

The average sunshine duration in September is 9.2h.

What is the UV index reading in September?

The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate health threat 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
Geneva, IA

Average temperature in September - Geneva, IA
  • Average high temperature in September: 72.5°F

The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (23.4°F).

  • Average low temperature in September: 54.3°F

The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (10.9°F).

Average pressure in September
Geneva, IA

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

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

Average wind speed in September
Geneva, IA

Average wind speed in September - Geneva, IA
  • Average wind speed in September: 8.5mph

The windiest months (with the highest average wind speed) are January and April (10.9mph).
The calmest months (with the lowest average wind speed) are July and August (7.2mph).

Average humidity in September
Geneva, IA

Average humidity in September - Geneva, IA
  • Average humidity in September: 77%

The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is October (71%).

Average rainfall in September
Geneva, IA

Average rainfall in September - Geneva, IA
  • Average rainfall in September: 2.56"

The wettest month (with the highest rainfall) is June (4.69").
The driest month (with the least rainfall) is January (1.1").

Average rainfall days in September
Geneva, IA

Average rainfall days in September - Geneva, IA
  • Average rainfall days in September: 12.5 days

The month with the highest number of rainy days is June (20.2 days).
The month with the least rainy days is February (4 days).

Average snowfall in September
Geneva, IA

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

The month with the highest snowfall is February (6.42").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Geneva, IA

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

The month with the highest number of snowfall days is January (13.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

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

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in September: 9h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

Average sunshine days in September
Geneva, IA

Average sunshine days in September - Geneva, IA
  • Average sunshine days in September: 15.2 days

The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is June (7.8 days).

Average UV index in September
Geneva, IA

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

The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is January (UV index 1).

Average cloud cover in September
Geneva, IA

Average cloud cover in September - Geneva, IA
  • Average cloud cover in September: 31

The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 31).

Average visibility in September
Geneva, IA

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

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

Geneva, Iowa, USA

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