September weather forecast
Muscatine, IA

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Weather in September

September in Muscatine marks the beginning of the fall season, evident from the cooling temperatures with highs only reaching 75.4°F (24.1°C). Despite the slight chill, the pleasant weather with adequate sunshine ensures a comfortable transition. With the humidity keeping pace, Muscatine retains a beautiful late-summer feel. The city begins its descent towards winter, but not without the remnant warmth of summer.

Temperature

The beginning of September in Muscatine, Iowa, brings a minor change in the average high-temperature, shifting from 81.1°F (27.3°C) in August to a still moderately hot 75.4°F (24.1°C). In September, the average low-temperature records at a mild 56.3°F (13.5°C) during the nights.

Humidity

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

Rainfall

In Muscatine, in September, it is raining for 12.3 days, with typically 2.52" (64mm) of accumulated precipitation. Throughout the year, there are 153.8 rainfall days, and 31.69" (805mm) of precipitation is accumulated.

Snowfall

May through September are months without snowfall.

Daylight

In Muscatine, the average length of the day in September is 12h and 28min.
On the first day of the month, sunrise is at 6:31 am and sunset at 7:36 pm. On the last day of September, sunrise is at 7:00 am and sunset at 6:47 pm CDT.

Sunshine

The average sunshine in September in Muscatine is 9.4h.

UV index

In September, the average daily maximum UV index in Muscatine is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the average person.
Note: In September, the maximum UV index of 4 suggests this advice:
Guard yourself - Avoiding sunburn is suggested. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Employ a wide-brim hat for potent defense against up to 50% of UV rays.

Frequently asked questions

What are the temperatures in Muscatine in September?

The high-temperature, in September, in Muscatine, is 75.4°F (24.1°C), while the low-temperature averages to 56.3°F (13.5°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, in August is appraised at 86°F (30°C).

What is the average humidity in September in Muscatine?

In September, the average relative humidity is 76%.

How many days does it rain in September in Muscatine?

In Muscatine, in September, during 12.3 rainfall days, 2.52" (64mm) of precipitation is typically accumulated.

When it does not snow in Muscatine?

May through September are months without snowfall in Muscatine, Iowa.

Does it snow in Muscatine in September?

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

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

The average day length in September in Muscatine is 12h and 28min.

What time are sunrise and sunset in September in Muscatine?

On the first day of September in Muscatine, sunrise is at 6:31 am and sunset at 7:36 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 6:47 pm CDT.

How long on average sun shines in September in Muscatine?

The average sunshine duration in September in Muscatine is 9.4h.

What is the UV index intensity in September in Muscatine?

The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate vulnerability 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
Muscatine, IA

Average temperature in September - Muscatine, 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 (28.4°F).

  • Average low temperature in September: 56.3°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (16.3°F).

Average pressure in September
Muscatine, IA

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

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

Average wind speed in September
Muscatine, IA

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

The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).

Average humidity in September
Muscatine, IA

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

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

Average rainfall in September
Muscatine, IA

Average rainfall in September - Muscatine, IA
  • Average rainfall in September: 2.52"

The wettest month (with the highest rainfall) is May (5").
The driest months (with the least rainfall) are February and December (1.46").

Average rainfall days in September
Muscatine, IA

Average rainfall days in September - Muscatine, IA
  • Average rainfall days in September: 12.3 days

The month with the highest number of rainy days is May (19.7 days).
The months with the least rainy days are January and February (6.3 days).

Average snowfall in September
Muscatine, IA

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

The month with the highest snowfall is January (4.92").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in September
Muscatine, IA

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

The month with the highest number of snowfall days is January (12.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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

Average daylight in September / Average sunshine in September - Muscatine, 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 2min

The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).

Average sunshine days in September
Muscatine, IA

Average sunshine days in September - Muscatine, IA
  • Average sunshine days in September: 15.6 days

The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is June (8.3 days).

Average UV index in September
Muscatine, IA

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

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

Average cloud cover in September
Muscatine, IA

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

The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are August and September (Cloud cover 29).

Average visibility in September
Muscatine, IA

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

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

Muscatine, Iowa, USA

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