September weather forecast
Detroit, OR

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Weather in September

September, the first month of the autumn in Detroit, is also an agreeable month, with an average temperature varying between 68.9°F (20.5°C) and 44.8°F (7.1°C).

Temperature

During the shift to September, a minor reduction in average high-temperature is observed, shifting from a warm 76.8°F (24.9°C) in August to an agreeable 68.9°F (20.5°C). Detroit measures a considerable dip from daytime highs with an average low-temperature of 44.8°F (7.1°C) during September.

Humidity

In September, the average relative humidity is 71%.

Rainfall

In Detroit, in September, during 10.7 rainfall days, 1.81" (46mm) of precipitation is typically accumulated. In Detroit, during the entire year, the rain falls for 182.5 days and collects up to 47.56" (1208mm) of precipitation.

Snowfall

June through October are months without snowfall in Detroit.

Daylight

In Detroit, the average length of the day in September is 12h and 30min.
On the first day of the month, sunrise is at 6:32 am and sunset at 7:44 pm. On the last day of September, sunrise is at 7:06 am and sunset at 6:50 pm PDT.

Sunshine

The average sunshine in September is 9.2h.

UV index

In Detroit, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In September, the maximum UV index of 3 transforms into these recommendations:
Make use of precautions - Shielding skin and eyes from injury is a requirement. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.

Frequently asked questions

What is the usual temperature for Detroit in September?

The high-temperature, in September, in Detroit, is 68.9°F (20.5°C), while the low-temperature averages to 44.8°F (7.1°C).

What is the average humidity in September?

In Detroit, the average relative humidity in September is 71%.

How many days does it rain in September?

In September, the rain falls for 10.7 days. Throughout September, 1.81" (46mm) of precipitation is accumulated.

When it does not snow?

In Detroit, snow does not fall in June through October.

What is the average length of the day in September?

The average day length in September is 12h and 30min.

When is the sunrise / sunset in September?

On the first day of September, sunrise is at 6:32 am and sunset at 7:44 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 6:50 pm PDT.

How long on average sun shines in September?

The average sunshine duration in September is 9.2h.

What is the UV index reading in September?

In Detroit, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium hazard to health from unsafe 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
Detroit, OR

Average temperature in September - Detroit, OR
  • Average high temperature in September: 68.9°F

The warmest month (with the highest average high temperature) is August (76.8°F).
The month with the lowest average high temperature is December (39.9°F).

  • Average low temperature in September: 44.8°F

The month with the highest average low temperature is August (46.8°F).
The coldest month (with the lowest average low temperature) is December (28.8°F).

Average pressure in September
Detroit, OR

Average pressure in September - Detroit, OR
  • Average pressure in September: 30.01"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is August (29.99"Hg).

Average wind speed in September
Detroit, OR

Average wind speed in September - Detroit, OR
  • Average wind speed in September: 4.1mph

The windiest month (with the highest average wind speed) is January (6mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).

Average humidity in September
Detroit, OR

Average humidity in September - Detroit, OR
  • Average humidity in September: 71%

The months with the highest relative humidity are February and March (88%).
The months with the lowest relative humidity are July and August (66%).

Average rainfall in September
Detroit, OR

Average rainfall in September - Detroit, OR
  • Average rainfall in September: 1.81"

The wettest month (with the highest rainfall) is January (6.97").
The driest month (with the least rainfall) is July (0.47").

Average rainfall days in September
Detroit, OR

Average rainfall days in September - Detroit, OR
  • Average rainfall days in September: 10.7 days

The month with the highest number of rainy days is March (21.3 days).
The month with the least rainy days is August (6.2 days).

Average snowfall in September
Detroit, OR

Average snowfall in September - Detroit, OR
  • Average snowfall in September: 0"

The month with the highest snowfall is February (15").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days in September
Detroit, OR

Average snowfall days in September - Detroit, OR
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (8.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

Average daylight in September /
Average sunshine in September
Detroit, OR

Average daylight in September / Average sunshine in September - Detroit, OR
  • 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: 9h and 1min

The month with the most sunshine is August (Average sunshine: 11h and 18min).
The month with the least sunshine is February (Average sunshine: 3h and 30min).

Average sunshine days in September
Detroit, OR

Average sunshine days in September - Detroit, OR
  • Average sunshine days in September: 16.8 days

The month with the most sunshine days is August (22.4 days).
The month with the least sunshine days is February (6.3 days).

Average UV index in September
Detroit, OR

Average UV index in September - Detroit, OR
  • Average UV index in September: 3

The months with the highest UV index are June and July (UV index 5).
The month with the lowest UV index is November (UV index 1).

Average cloud cover in September
Detroit, OR

Average cloud cover in September - Detroit, OR
  • Average cloud cover in September: 34

The month with the most cloud cover is March (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 21).

Average visibility in September
Detroit, OR

Average visibility in September - Detroit, OR
  • Average visibility in September: 5mi

The month with the highest visibility is August (6mi).
The months with the lowest visibility are January, February, March, April, November and December (4mi).

Detroit, Oregon, USA

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