September weather forecast
Goodwin, SD

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Weather in September

September, the first month of the autumn in Goodwin, is still a pleasant month, with an average temperature varying between 71.6°F (22°C) and 51.3°F (10.7°C).

Temperature

The onset of September aligns with a soft reduction in the average high-temperature, gently falling from a warm 80.1°F (26.7°C) in August to an agreeable 71.6°F (22°C). Throughout the month of September, the nighttime temperature dips to an average of 51.3°F (10.7°C).

Humidity

The months with the lowest humidity are September and October, with an average relative humidity of 68%.

Rainfall

In Goodwin, in September, it is raining for 10.4 days, with typically 1.57" (40mm) of accumulated precipitation. Throughout the year, in Goodwin, there are 112.3 rainfall days, and 18.78" (477mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall.

Daylight

In September, the average length of the day in Goodwin, South Dakota, is 12h and 31min.
On the first day of September in Goodwin, sunrise is at 6:50 am and sunset at 8:03 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 7:09 pm CDT.

Sunshine

The average sunshine in September is 8.8h.

UV index

The average daily maximum UV index in September in Goodwin is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for average individuals.
Note: In September, the maximum UV index of 4 suggests this advice:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. To guard against the harmful effects of the Sun, minimize exposure during midday. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
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Frequently asked questions

What is the temperature in September in Goodwin?

The high-temperature, in September, in Goodwin, records 71.6°F (22°C), while the low-temperature is 51.3°F (10.7°C). In July, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which combines air temperature and relative humidity, is appraised at 84.2°F (29°C).

What are the least humid months in Goodwin?

The months with the lowest humidity are September and October, with an average relative humidity of 68%.

What is the average humidity in September in Goodwin?

The average relative humidity in September in Goodwin is 68%.

How many days does it rain in September in Goodwin?

In Goodwin, in September, it is raining for 10.4 days, with typically 1.57" (40mm) of accumulated precipitation.

When it does not snow in Goodwin?

In Goodwin, South Dakota, snow does not fall in June through September.

Does it snow in Goodwin in September?

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

How many hours of daylight does Goodwin have in September?

In September, the average day length in Goodwin, South Dakota, is 12h and 31min.

When is the sunrise / sunset in September in Goodwin?

On the first day of September, sunrise is at 6:50 am and sunset at 8:03 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 7:09 pm CDT.

How long on average sun shines in September in Goodwin?

In September, the average sunshine duration in Goodwin is 8.8h.

What is the UV index reading in September in Goodwin?

The average daily maximum UV index in September in Goodwin, South Dakota, is 4. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unprotected exposure to 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
Goodwin, SD

Average temperature in September - Goodwin, SD
  • Average high temperature in September: 71.6°F

The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (19.4°F).

  • Average low temperature in September: 51.3°F

The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is January (5.5°F).

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Average pressure in September
Goodwin, SD

Average pressure in September - Goodwin, SD
  • Average pressure in September: 29.97"Hg

The months with the highest atmospheric pressure are January and February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).

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Average wind speed in September
Goodwin, SD

Average wind speed in September - Goodwin, SD
  • Average wind speed in September: 10mph

The windiest month (with the highest average wind speed) is April (11.6mph).
The calmest month (with the lowest average wind speed) is July (8.5mph).

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Average humidity in September
Goodwin, SD

Average humidity in September - Goodwin, SD
  • Average humidity in September: 68%

The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are September and October (68%).

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Average rainfall in September
Goodwin, SD

Average rainfall in September - Goodwin, SD
  • Average rainfall in September: 1.57"

The wettest month (with the highest rainfall) is June (3.19").
The driest months (with the least rainfall) are January and February (0.59").

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Average rainfall days in September
Goodwin, SD

Average rainfall days in September - Goodwin, SD
  • Average rainfall days in September: 10.4 days

The month with the highest number of rainy days is June (17.2 days).
The month with the least rainy days is February (2.7 days).

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Average snowfall in September
Goodwin, SD

Average snowfall in September - Goodwin, SD
  • Average snowfall in September: 0"

The months with the highest snowfall are January and December (3.74").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Goodwin, SD

Average snowfall days in September - Goodwin, SD
  • Average snowfall days in September: 0.1 days

The month with the highest number of snowfall days is January (14.4 days).
The months with the least snowfall days are June, July and August (0 days).

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Average daylight in September /
Average sunshine in September
Goodwin, SD

Average daylight in September / Average sunshine in September - Goodwin, SD
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).

  • Average sunshine in September: 8h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).

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Average sunshine days in September
Goodwin, SD

Average sunshine days in September - Goodwin, SD
  • Average sunshine days in September: 18.2 days

The month with the most sunshine days is October (19.1 days).
The month with the least sunshine days is June (10.3 days).

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Average UV index in September
Goodwin, SD

Average UV index in September - Goodwin, SD
  • 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 and December (UV index 1).

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Average cloud cover in September
Goodwin, SD

Average cloud cover in September - Goodwin, SD
  • Average cloud cover in September: 30

The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 27).

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Average visibility in September
Goodwin, SD

Average visibility in September - Goodwin, SD
  • Average visibility in September: 6mi

The 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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Goodwin, South Dakota, USA

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