September weather forecast
Okemos, MI

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Weather in September

The first month of the autumn, September, is also an agreeable month in Okemos, Michigan, with an average temperature ranging between min 52.5°F (11.4°C) and max 71.4°F (21.9°C).

Temperature

September implies a soft temperature shift, with average high-temperatures reducing from August's moderately hot 77.5°F (25.3°C) to a pleasant 71.4°F (21.9°C). Okemos sees an average low-temperature of 52.5°F (11.4°C) during September.

Humidity

The average relative humidity in September is 79%.

Rainfall

In September, the rain falls for 12.5 days. Throughout September, 1.5" (38mm) of precipitation is accumulated. Throughout the year, in Okemos, there are 145.2 rainfall days, and 22.76" (578mm) of precipitation is accumulated.

Snowfall

In Okemos, snow does not fall in June 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 7:03 am and sunset at 8:11 pm. On the last day of September, sunrise is at 7:34 am and sunset at 7:20 pm EDT.

Sunshine

The average sunshine in September is 7.8h.

UV index

The average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In September, the maximum UV index of 3 suggests these recommendations:
Put precautions into practice - Guidance to elude sunburn is provided. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Updated: Aug 17, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in September?

The high-temperature during September is 71.4°F (21.9°C) and the low-temperature is 52.5°F (11.4°C).

What is the average humidity in September?

In September, the average relative humidity is 79%.

How many days does it rain in September?

In September, the rain falls for 12.5 days. Throughout September, 1.5" (38mm) of precipitation is accumulated.

When it does not snow in Okemos?

June through September are months without snowfall.

Does it snow in September?

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

What is the average length of the day in September?

In Okemos, the average day length in September is 12h and 29min.

What time are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 7:03 am and sunset at 8:11 pm. On the last day of the month, sunrise is at 7:34 am and sunset at 7:20 pm EDT.

How many hours of sunshine does Okemos have in September?

The average sunshine duration in September is 7.8h.

What is the UV index intensity in September?

The average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate vulnerability from exposure to the Sun's 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
Okemos, MI

Average temperature in September - Okemos, MI
  • 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 (27.5°F).

  • Average low temperature in September: 52.5°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 (16.7°F).

Average pressure in September
Okemos, MI

Average pressure in September - Okemos, MI
  • Average pressure in September: 30.03"Hg

The month with the highest atmospheric pressure is March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in September
Okemos, MI

Average wind speed in September - Okemos, MI
  • Average wind speed in September: 7.3mph

The windiest months (with the highest average wind speed) are January and February (10.1mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).

Average humidity in September
Okemos, MI

Average humidity in September - Okemos, MI
  • Average humidity in September: 79%

The months with the highest relative humidity are January and February (87%).
The month with the lowest relative humidity is April (77%).

Average rainfall in September
Okemos, MI

Average rainfall in September - Okemos, MI
  • Average rainfall in September: 1.5"

The wettest month (with the highest rainfall) is May (2.91").
The driest months (with the least rainfall) are February and December (1.26").

Average rainfall days in September
Okemos, MI

Average rainfall days in September - Okemos, MI
  • Average rainfall days in September: 12.5 days

The month with the highest number of rainy days is May (17.2 days).
The month with the least rainy days is February (5.3 days).

Average snowfall in September
Okemos, MI

Average snowfall in September - Okemos, MI
  • Average snowfall in September: 0"

The month with the highest snowfall is February (4.72").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Okemos, MI

Average snowfall days in September - Okemos, MI
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (17.2 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Okemos, MI

Average daylight in September / Average sunshine in September - Okemos, MI
  • 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: 7h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 2h and 42min).

Average sunshine days in September
Okemos, MI

Average sunshine days in September - Okemos, MI
  • Average sunshine days in September: 14.9 days

The month with the most sunshine days is September (14.9 days).
The month with the least sunshine days is January (9.6 days).

Average UV index in September
Okemos, MI

Average UV index in September - Okemos, MI
  • Average UV index in September: 3

The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in September
Okemos, MI

Average cloud cover in September - Okemos, MI
  • Average cloud cover in September: 37

The month with the most cloud cover is January (Cloud cover 71).
The month with the least cloud cover is July (Cloud cover 30).

Average visibility in September
Okemos, MI

Average visibility in September - Okemos, MI
  • Average visibility in September: 5mi

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

Okemos, Michigan, USA

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