Petoskey
Michigan, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Petoskey, MI

A sweet bird
A sweet bird's eye view of the scenic Petoskey, Michigan, the sea outback, and dramatic cloudy skies in the fall
September, the first month of the autumn, in Petoskey, is still a comfortable month, with average temperature ranging between min 53.1°F (11.7°C) and max 66.4°F (19.1°C).

Temperature

In September, the average high-temperature slightly decreases, from a pleasant 73°F (22.8°C) in August, to an enjoyable 66.4°F (19.1°C). In September, the average low-temperature is 53.1°F (11.7°C).

Humidity

The average relative humidity is 78%.

Rainfall

In Petoskey, it is raining for 11.4 days, with typically 1.97" (50mm) of accumulated precipitation. Throughout the year, in Petoskey, there are 129.6 rainfall days, and 23.43" (595mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall.

Daylight

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

Sunshine

In September, the average sunshine is 7.8h.

UV index

In Petoskey, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to the UV radiation for average individuals.
Note: In September, the average maximum UV index of 3 translate into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. 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.

What is the temperature in September in Petoskey?

The average high-temperature, in September, is 66.4°F (19.1°C), while the average low-temperature is 53.1°F (11.7°C).

What is the average humidity in September in Petoskey?

In September, the average relative humidity is 78%.

How many days does it rain in September in Petoskey?

In September, in Petoskey, Michigan, the rain falls for 11.4 days. Throughout September, 1.97" (50mm) of precipitation is accumulated.

Does it snow in Petoskey in September?

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

When it does not snow in Petoskey?

In Petoskey, Michigan, snow does not fall in June through September.

How many hours of daylight does Petoskey have in September?

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

How long on average sun shines in September in Petoskey?

The average sunshine in September is 7.8h.

How high is the UV index in September in Petoskey?

In Petoskey, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unsafe exposure to the Sun's UV rays.
Average temperature in September - Petoskey, MI
  • Average high temperature in September: 19.1°C

Warmest months (with the highest average high temperature) are July and August (22.8°C).
The month with the lowest average high temperature is January (-3.9°C).

  • Average low temperature in September: 11.7°C

The month with the highest average low temperature is August (14.8°C).
The coldest month (with the lowest average low temperature) is February (-8.5°C).

Average humidity in September - Petoskey, MI
  • Average humidity in September: 78%

Months with the highest relative humidity are January and February (88%).
The month with the lowest relative humidity is May (74%).

Average rainfall in September - Petoskey, MI
  • Average rainfall in September: 50mm

The wettest month (with the highest rainfall) is October (70mm).
The driest month (with the lowest rainfall) is February (34mm).

Average rainfall days in September - Petoskey, MI
  • Average rainfall days in September: 11.4 days

The month with the highest number of rainy days is October (18 days).
The month with the lowest number of rainy days is February (3.7 days).

Average snowfall in September - Petoskey, MI
  • Average snowfall in September: 0mm

The month with the highest snowfall is December (209mm).
Months with the lowest snowfall are June, July, August and September (0mm).

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

The month with the highest number of snowfall days is January (21.5 days).
Months with the lowest number of snowfall days are June, July, August and September (0 days).

Average daylight in September / Average sunshine in September - Petoskey, MI
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.6h).
The month with shortest days is December (Average daylight: 8.8h).

  • Average sunshine in September: 7.8h

The month with most sunshine is July (Average sunshine: 10.1h).
The month with least sunshine is January (Average sunshine: 1.4h).

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

Months with the highest UV index are June, July and August (UV index 5).
Months with the lowest UV index are January, February, November and December (UV index 1).