September weather forecast
Portage, IN

Weather in September

September, the first month of the autumn, in Portage, is still a pleasant month, with temperature in the range of an average low of 58.5°F (14.7°C) and an average high of 73°F (22.8°C).

Temperature

In September, the average high-temperature is almost the same as in August - an agreeable 73°F (22.8°C). In Portage, in September, the average low-temperature is 58.5°F (14.7°C).

Humidity

The average relative humidity in September is 77%.

Rainfall

In Portage, in September, it is raining for 14.1 days, with typically 1.65" (42mm) of accumulated precipitation. In Portage, during the entire year, the rain falls for 157.4 days and collects up to 23.9" (607mm) of precipitation.

Snowfall

May through October are months without snowfall.

Daylight

In September, the average length of the day is 12.5h.

Sunshine

In September, the average sunshine in Portage is 8.8h.

UV index

In September, the average daily maximum UV index in Portage, Indiana, is 4. A UV Index reading of 3 to 5 represents a medium health hazard from the exposure to the Sun's UV rays for the average person.
Note: In September, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. 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 Portage?

The average relative humidity in September in Portage, Indiana, is 77%.

How many days does it rain in September in Portage?

In Portage, Indiana, in September, during 14.1 rainfall days, 1.65" (42mm) of precipitation is typically accumulated.

When it does not snow in Portage?

May through October are months without snowfall in Portage, Indiana.

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

In September, the average length of the day in Portage is 12.5h.

How long on average sun shines in September in Portage?

The average sunshine in September in Portage, Indiana, is 8.8h.

What is the UV index reading in September in Portage?

In Portage, Indiana, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium health risk from unsafe exposure to the Sun's UV rays.

Average temperature in September
Portage, IN

Average temperature in September - Portage, IN
  • Average high temperature in September: 73°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 (30.2°F).

  • Average low temperature in September: 58.5°F

The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).

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Average pressure in September
Portage, IN

Average pressure in September - Portage, IN
  • Average pressure in September: 30.03"

The month with the highest atmospheric pressure is January (30.11").
The month with the lowest atmospheric pressure is June (29.93").

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Average wind speed in September
Portage, IN

Average wind speed in September - Portage, IN
  • Average wind speed in September: 8.1mph

The windiest month (with the highest average wind speed) is January (11.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.9mph).

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Average humidity in September
Portage, IN

Average humidity in September - Portage, IN
  • Average humidity in September: 77%

The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is October (73%).

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Average rainfall in September
Portage, IN

Average rainfall in September - Portage, IN
  • Average rainfall in September: 1.65"

The wettest month (with the highest rainfall) is June (3.19").
The driest month (with the least rainfall) is February (1.18").

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Average rainfall days in September
Portage, IN

Average rainfall days in September - Portage, IN
  • Average rainfall days in September: 14.1 days

The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is January (7.2 days).

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Average snowfall in September
Portage, IN

Average snowfall in September - Portage, IN
  • Average snowfall in September: 0"

The month with the highest snowfall is January (3.27").
Months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in September
Portage, IN

Average snowfall days in September - Portage, IN
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (13.5 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in September /
Average sunshine in September
Portage, IN

Average daylight in September / Average sunshine in September - Portage, IN
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.2h).
The month with the shortest days is December (Average daylight: 9.2h).

  • Average sunshine in September: 8.8h

The month with the most sunshine is August (Average sunshine: 10.3h).
The month with the least sunshine is January (Average sunshine: 3.5h).

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Average sunshine days in September
Portage, IN

Average sunshine days in September - Portage, IN
  • Average sunshine days in September: 12.9 days

The month with the most sunshine days is November (15.7 days).
Months with the least sunshine days are June and August (10.4 days).

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Average UV index in September
Portage, IN

Average UV index in September - Portage, IN
  • Average UV index in September: 4

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

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Average cloud cover in September
Portage, IN

Average cloud cover in September - Portage, IN
  • Average cloud cover in September: 31

The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 29).

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Average visibility in September
Portage, IN

Average visibility in September - Portage, IN
  • Average visibility in September: 6mi

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

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