September weather forecast
Whittemore, IA

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Weather in September

September, the first month of the autumn in Whittemore, is still a warm month, with temperature in the range of an average high of 73.4°F (23°C) and an average low of 54.5°F (12.5°C).

Temperature

Whittemore in September witnesses an average high-temperature of a still warm 73.4°F (23°C), indicating a slight variation from August's 78.3°F (25.7°C). During September, the average low-temperature is a cool 54.5°F (12.5°C).

Humidity

In Whittemore, the average relative humidity in September is 75%.

Rainfall

In Whittemore, during September, the rain falls for 9.5 days and regularly aggregates up to 1.06" (27mm) of precipitation. In Whittemore, during the entire year, the rain falls for 100.5 days and collects up to 11.69" (297mm) of precipitation.

Snowfall

In Whittemore, snow does not fall in May through September.

Daylight

The average length of the day in September is 12h and 29min.
On the first day of the month, sunrise is at 6:42 am and sunset at 7:51 pm. On the last day of September, sunrise is at 7:14 am and sunset at 7:00 pm CDT.

Sunshine

In September, the average sunshine in Whittemore is 9.1h.

UV index

In Whittemore, the average daily maximum UV index in September 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 ordinary person.
Note: The daily maximum UV index of 4 in September interprets into the following advice:
Act with care - The need to guard against sun damage is communicated. Around midday, solar radiation is most harmful; hence, exposure should be limited. Experience reduced UV exposure by about half when donning a wide-brim hat.

Frequently asked questions

What is the usual temperature for Whittemore in September?

In Whittemore, in September, the average high-temperature is 73.4°F (23°C), and the average low-temperature is 54.5°F (12.5°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which combines air temperature and relative humidity, in July is estimated at 86°F (30°C).

What is the average humidity in September?

In September, the average relative humidity is 75%.

How many days does it rain in September?

In Whittemore, in September, it is raining for 9.5 days, with typically 1.06" (27mm) of accumulated precipitation.

When it does not snow?

May through September are months without snowfall.

Does it snow in September?

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

What is the average length of the day in September?

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

When are sunrise and sunset in September?

On the first day of September, sunrise is at 6:42 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 7:00 pm CDT.

How long on average sun shines in September?

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

How high is the UV index 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 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
Whittemore, IA

Average temperature in September - Whittemore, IA
  • Average high temperature in September: 73.4°F

The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (23.4°F).

  • Average low temperature in September: 54.5°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 (10.8°F).

Average pressure in September
Whittemore, IA

Average pressure in September - Whittemore, 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
Whittemore, IA

Average wind speed in September - Whittemore, IA
  • Average wind speed in September: 8.7mph

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 (7.5mph).

Average humidity in September
Whittemore, IA

Average humidity in September - Whittemore, IA
  • Average humidity in September: 75%

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

Average rainfall in September
Whittemore, IA

Average rainfall in September - Whittemore, IA
  • Average rainfall in September: 1.06"

The wettest month (with the highest rainfall) is June (1.89").
The driest month (with the least rainfall) is January (0.39").

Average rainfall days in September
Whittemore, IA

Average rainfall days in September - Whittemore, IA
  • Average rainfall days in September: 9.5 days

The month with the highest number of rainy days is June (14.5 days).
The month with the least rainy days is February (2.1 days).

Average snowfall in September
Whittemore, IA

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

The month with the highest snowfall is February (2.56").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in September
Whittemore, IA

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

The month with the highest number of snowfall days is January (9.8 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
Whittemore, IA

Average daylight in September / Average sunshine in September - Whittemore, 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 6min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

Average sunshine days in September
Whittemore, IA

Average sunshine days in September - Whittemore, IA
  • Average sunshine days in September: 17.9 days

The month with the most sunshine days is November (22.5 days).
The month with the least sunshine days is June (12.8 days).

Average UV index in September
Whittemore, IA

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

The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in September
Whittemore, IA

Average cloud cover in September - Whittemore, IA
  • Average cloud cover in September: 32

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

Average visibility in September
Whittemore, IA

Average visibility in September - Whittemore, 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).

Whittemore, Iowa, USA

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