September weather forecast
Morrison, IA

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Weather in September

The first month of the autumn, September, is still a warm month in Morrison, Iowa, with temperature in the range of an average high of 73.6°F (23.1°C) and an average low of 54.7°F (12.6°C).

Temperature

Transitioning into September, Morrison experiences an average high-temperature of a still moderately hot 73.6°F (23.1°C), marking a minor shift from the preceding month. Morrison observes an average nighttime low-temperature of 54.7°F (12.6°C) during the month of September.

Humidity

The average relative humidity in September is 78%.

Rainfall

In September, the rain falls for 12.7 days. Throughout September, 2.52" (64mm) of precipitation is accumulated. In Morrison, during the entire year, the rain falls for 144.6 days and collects up to 30.75" (781mm) of precipitation.

Snowfall

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

Daylight

In September, the average length of the day is 12h and 28min.
On the first day of the month, sunrise is at 6:36 am and sunset at 7:44 pm. On the last day of September, sunrise is at 7:07 am and sunset at 6:53 pm CDT.

Sunshine

In September, the average sunshine in Morrison is 9.3h.

UV index

In Morrison, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: The maximum daily UV index of 4 in September converts into the following recommendations:
Exercise prevention - Protecting skin and eyes from harm is required. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Stay sun-safe with clothing that is both closely woven and worn loosely.

Frequently asked questions

What is the temperature in September?

In Morrison, in September, the average high-temperature is 73.6°F (23.1°C), and the average low-temperature is 54.7°F (12.6°C).

What is the average humidity in September?

In Morrison, the average relative humidity in September is 78%.

How many days does it rain in September?

In September, the rain falls for 12.7 days. Throughout September, 2.52" (64mm) of precipitation is accumulated.

When it does not snow?

June through September are months without snowfall.

Does it snow in September?

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

How many hours of daylight does Morrison have in September?

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

When is the sunrise / sunset in September?

On the first day of September, sunrise is at 6:36 am and sunset at 7:44 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 6:53 pm CDT.

How many hours of sunshine does Morrison have in September?

The average sunshine duration in September is 9.3h.

What is the UV index intensity in September?

In Morrison, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium hazard to health 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
Morrison, IA

Average temperature in September - Morrison, IA
  • Average high temperature in September: 73.6°F

The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (25°F).

  • Average low temperature in September: 54.7°F

The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (12.6°F).

Average pressure in September
Morrison, IA

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

The months with the highest atmospheric pressure are January and February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

Average wind speed in September
Morrison, IA

Average wind speed in September - Morrison, IA
  • Average wind speed in September: 8.3mph

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 (7.1mph).

Average humidity in September
Morrison, IA

Average humidity in September - Morrison, IA
  • Average humidity in September: 78%

The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is October (71%).

Average rainfall in September
Morrison, IA

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

The wettest month (with the highest rainfall) is May (4.76").
The driest month (with the least rainfall) is January (1.1").

Average rainfall days in September
Morrison, IA

Average rainfall days in September - Morrison, IA
  • Average rainfall days in September: 12.7 days

The month with the highest number of rainy days is June (19.6 days).
The month with the least rainy days is February (3.9 days).

Average snowfall in September
Morrison, IA

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

The month with the highest snowfall is January (4.88").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Morrison, IA

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

The month with the highest number of snowfall days is January (12.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

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

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in September: 9h and 2min

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 54min).

Average sunshine days in September
Morrison, IA

Average sunshine days in September - Morrison, IA
  • Average sunshine days in September: 14.7 days

The months with the most sunshine days are October and November (16.9 days).
The month with the least sunshine days is June (7.9 days).

Average UV index in September
Morrison, IA

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

The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is January (UV index 1).

Average cloud cover in September
Morrison, IA

Average cloud cover in September - Morrison, IA
  • Average cloud cover in September: 30

The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is September (Cloud cover 30).

Average visibility in September
Morrison, IA

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

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

Morrison, Iowa, USA

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