September weather forecast
Dolliver, IA

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Weather in September

September, the first month of the autumn in Dolliver, is still a pleasant month, with an average temperature ranging between min 53.8°F (12.1°C) and max 72.7°F (22.6°C).

Temperature

September's onset introduces a mild reduction in the average high-temperature, from a warm 78.1°F (25.6°C) in August to an agreeable 72.7°F (22.6°C). Dolliver in September experiences a low-temperature average of 53.8°F (12.1°C).

Humidity

In Dolliver, the average relative humidity in September is 74%.

Rainfall

In Dolliver, Iowa, in September, it is raining for 11.7 days, with typically 2.28" (58mm) of accumulated precipitation. Throughout the year, there are 123.7 rainfall days, and 23.66" (601mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall.

Daylight

In Dolliver, the average length of the day in September is 12h and 29min.
On the first day of the month, sunrise is at 6:43 am and sunset at 7:53 pm. On the last day of September, sunrise is at 7:15 am and sunset at 7:00 pm CDT.

Sunshine

The average sunshine in September is 9.1h.

UV index

In Dolliver, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: A daily maximum UV index of 4 in September translates into the following instructions:
Ensure safety - Imperative it is to shield skin and eyes from damage. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Updated: Aug 31, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in September?

The average high-temperature and low-temperature during September are 72.7°F (22.6°C) and 53.8°F (12.1°C) respectively.

What is the average humidity in September in Dolliver?

The average relative humidity in September is 74%.

How many days does it rain in September?

In Dolliver, in September, it is raining for 11.7 days, with typically 2.28" (58mm) of accumulated precipitation.

When it does not snow?

June through September are months without snowfall.

Does it snow in September?

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

How many hours of daylight does Dolliver have in September?

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

When is the sunrise / sunset in September?

On the first day of September, sunrise is at 6:43 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 7:00 pm CDT.

How long on average sun shines in September in Dolliver?

In Dolliver, the average sunshine duration in September is 9.1h.

What is the UV index reading in September?

In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents 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
Dolliver, IA

Average temperature in September - Dolliver, IA
  • Average high temperature in September: 72.7°F

The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (22.5°F).

  • Average low temperature in September: 53.8°F

The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (9.9°F).

Average pressure in September
Dolliver, IA

Average pressure in September - Dolliver, IA
  • Average pressure in September: 30"Hg

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

Average wind speed in September
Dolliver, IA

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

The windiest month (with the highest average wind speed) is January (11.2mph).
The calmest month (with the lowest average wind speed) is July (7.6mph).

Average humidity in September
Dolliver, IA

Average humidity in September - Dolliver, IA
  • Average humidity in September: 74%

The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is October (68%).

Average rainfall in September
Dolliver, IA

Average rainfall in September - Dolliver, IA
  • Average rainfall in September: 2.28"

The wettest month (with the highest rainfall) is June (3.7").
The driest month (with the least rainfall) is January (0.87").

Average rainfall days in September
Dolliver, IA

Average rainfall days in September - Dolliver, IA
  • Average rainfall days in September: 11.7 days

The month with the highest number of rainy days is June (18 days).
The month with the least rainy days is February (2.3 days).

Average snowfall in September
Dolliver, IA

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

The month with the highest snowfall is February (4.8").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Dolliver, IA

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

The month with the highest number of snowfall days is January (11.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

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

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).

  • 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).

Average sunshine days in September
Dolliver, IA

Average sunshine days in September - Dolliver, IA
  • Average sunshine days in September: 16.8 days

The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is June (10.1 days).

Average UV index in September
Dolliver, IA

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

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

Average cloud cover in September
Dolliver, IA

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

The month with the most cloud cover is January (Cloud cover 59).
The months with the least cloud cover are July and September (Cloud cover 31).

Average visibility in September
Dolliver, IA

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

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

Dolliver, Iowa, USA

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