September weather forecast
Northwood, IA

Weather in September

The first month of the autumn, September, is still a pleasant month in Northwood, Iowa, with an average temperature varying between 53.1°F (11.7°C) and 71.4°F (21.9°C).

Temperature

In September, the average high-temperature marginally drops from a moderately hot 76.8°F (24.9°C) in August to a pleasant 71.4°F (21.9°C). The average low-temperature, in Northwood, is 53.1°F (11.7°C).

Humidity

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

Rainfall

In Northwood, in September, during 11.8 rainfall days, 2.36" (60mm) of precipitation is typically accumulated. Throughout the year, there are 134.3 rainfall days, and 25.08" (637mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall in Northwood.

Daylight

The average length of the day in September in Northwood is 12h and 29min.
On the first day of the month, sunrise is at 6:37 am and sunset at 7:48 pm. On the last day of September, in Northwood, sunrise is at 7:09 am and sunset at 6:56 pm CDT.

Sunshine

In September, the average sunshine is 8.9h.

UV index

The average daily maximum UV index in September in Northwood is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 4 in September interpret into the following advice:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the average humidity in September in Northwood?

In September, the average relative humidity is 78%.

How much does it rain in Northwood in September?

In September, the rain falls for 11.8 days. Throughout September, 2.36" (60mm) of precipitation is accumulated.

When it does not snow in Northwood?

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

Does it snow in Northwood in September?

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

How many hours of daylight does Northwood have in September?

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

When is the sunrise / sunset in September in Northwood?

In September, on the first day of the month, sunrise is at 6:37 am and sunset at 7:48 pm. On the last day of the month, in Northwood, Iowa, sunrise is at 7:09 am and sunset at 6:56 pm CDT.

How long on average sun shines in September in Northwood?

The average sunshine duration in September in Northwood, Iowa, is 8.9h.

How high is the UV index in September in Northwood?

In Northwood, Iowa, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health risk from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Northwood, IA

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

The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is January (21.6°F).

  • Average low temperature in September: 53.1°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°F).

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Average pressure in September
Northwood, IA

Average pressure in September - Northwood, 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).

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Average wind speed in September
Northwood, IA

Average wind speed in September - Northwood, IA
  • Average wind speed in September: 8.6mph

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 (7.4mph).

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Average humidity in September
Northwood, IA

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

The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are April and October (72%).

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Average rainfall in September
Northwood, IA

Average rainfall in September - Northwood, IA
  • Average rainfall in September: 2.36"

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

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Average rainfall days in September
Northwood, IA

Average rainfall days in September - Northwood, IA
  • Average rainfall days in September: 11.8 days

The month with the highest number of rainy days is June (18.4 days).
The month with the least rainy days is February (2.9 days).

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Average snowfall in September
Northwood, IA

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

The month with the highest snowfall is February (5.94").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Northwood, IA

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

The month with the highest number of snowfall days is January (13.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in September / Average sunshine in September - Northwood, IA
  • Average daylight in September: 12h and 29min

The month with the longest days is June (Average daylight: 15h and 22min).
The month with the shortest days is December (Average daylight: 9h and 1min).

  • Average sunshine in September: 8h and 54min

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).

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Average sunshine days in September
Northwood, IA

Average sunshine days in September - Northwood, IA
  • Average sunshine days in September: 15.1 days

The month with the most sunshine days is October (18.1 days).
The month with the least sunshine days is June (9.1 days).

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Average UV index in September
Northwood, IA

Average UV index in September - Northwood, 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).

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Average cloud cover in September
Northwood, IA

Average cloud cover in September - Northwood, IA
  • Average cloud cover in September: 34

The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 32).

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Average visibility in September
Northwood, IA

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

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

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