September weather forecast
Osage, IA

Share

Weather in September

The first month of the autumn, September, is also an agreeable month in Osage, Iowa, with an average temperature fluctuating between 71.4°F (21.9°C) and 52.9°F (11.6°C).

Temperature

Osage's progression into September involves a gentle drop in the average high-temperature, from a moderately hot 76.8°F (24.9°C) in August to an agreeable 71.4°F (21.9°C). In September, the average low-temperature records at a cool 52.9°F (11.6°C) during the nights.

Humidity

In Osage, the average relative humidity in September is 79%.

Rainfall

In September, the rain falls for 12.1 days. Throughout September, 2.32" (59mm) of precipitation is accumulated. In Osage, during the entire year, the rain falls for 135.3 days and collects up to 26.54" (674mm) of precipitation.

Snowfall

June through September are months without snowfall.

Daylight

In September, the average length of the day is 12h and 29min.
On the first day of September, sunrise is at 6:36 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 6:53 pm CDT.

Sunshine

In Osage, Iowa, the average sunshine in September is 8.9h.

UV index

In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum UV index of 4 during September leads to these instructions:
Take precautions - Protection against sun damage is advised. When the Sun is at its strongest around midday, find shade and limit exposure. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Updated: Jul 26, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average September temperature?

In Osage, in September, the average high-temperature is 71.4°F (21.9°C), and the average low-temperature is 52.9°F (11.6°C).

What is the average humidity in September?

In September, the average relative humidity is 79%.

How many days does it rain in September?

In Osage, Iowa, in September, during 12.1 rainfall days, 2.32" (59mm) of precipitation is typically accumulated.

When it does not snow?

June through September are months without snowfall in Osage.

Does it snow in September?

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

What is the average length of the day in September in Osage?

In September, the average day length in Osage is 12h and 29min.

When is the sunrise / sunset in September?

In September, on the first day of the month, sunrise is at 6:36 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 6:53 pm CDT.

How many hours of sunshine does Osage have in September?

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

What is the UV index intensity in September?

In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium health risk from exposure to the Sun's 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
Osage, IA

Average temperature in September - Osage, IA
  • Average high temperature in September: 71.4°F

The warmest month (with the highest average high temperature) is July (78.6°F).
The month with the lowest average high temperature is January (21.6°F).

  • Average low temperature in September: 52.9°F

The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is January (9°F).

Average pressure in September
Osage, IA

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

The months with the highest atmospheric pressure are January and February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

Average wind speed in September
Osage, IA

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

The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (7.3mph).

Average humidity in September
Osage, IA

Average humidity in September - Osage, IA
  • Average humidity in September: 79%

The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is October (73%).

Average rainfall in September
Osage, IA

Average rainfall in September - Osage, IA
  • Average rainfall in September: 2.32"

The wettest month (with the highest rainfall) is June (4.13").
The driest month (with the least rainfall) is January (0.94").

Average rainfall days in September
Osage, IA

Average rainfall days in September - Osage, IA
  • Average rainfall days in September: 12.1 days

The month with the highest number of rainy days is June (19.2 days).
The month with the least rainy days is February (3 days).

Average snowfall in September
Osage, IA

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

The month with the highest snowfall is February (6.46").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Osage, IA

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

The month with the highest number of snowfall days is December (11.9 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in September / Average sunshine in September - Osage, 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 0min).

  • Average sunshine in September: 8h and 5min

The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).

Average sunshine days in September
Osage, IA

Average sunshine days in September - Osage, IA
  • Average sunshine days in September: 15.5 days

The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is June (9.5 days).

Average UV index in September
Osage, IA

Average UV index in September - Osage, 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, February, November and December (UV index 1).

Average cloud cover in September
Osage, IA

Average cloud cover in September - Osage, IA
  • Average cloud cover in September: 33

The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 32).

Average visibility in September
Osage, IA

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

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

Osage, Iowa, USA

Weather forecast for your location

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