September weather forecast
Rosemount, OH

Weather in September

September, the first month of the autumn in Rosemount, is still a warm month, with an average temperature fluctuating between 78.4°F (25.8°C) and 56.7°F (13.7°C).

Temperature

In Rosemount, the average high-temperature in September marginally drops from 84.9°F (29.4°C) in August to a still moderately hot 78.4°F (25.8°C). In September, in Rosemount, Ohio, the average low-temperature is 56.7°F (13.7°C).

Humidity

In Rosemount, Ohio, the average relative humidity in September is 76%.

Rainfall

September is the month with the least rainfall in Rosemount, Ohio. Rain falls for 13.3 days and accumulates 1.85" (47mm) of precipitation.

Snowfall

In Rosemount, snow does not fall in May through September.

Daylight

In Rosemount, the average length of the day in September is 12h and 26min.
On the first day of September, sunrise is at 7:00 am and sunset at 8:02 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 7:16 pm EDT.

Sunshine

In Rosemount, the average sunshine in September is 8.2h.

UV index

In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: In September, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in September in Rosemount?

The average high-temperature, in September, in Rosemount, Ohio, is 78.4°F (25.8°C), while the average low-temperature is 56.7°F (13.7°C). in August, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which represents the influence of relative humidity on air temperature, is evaluated at 95°F (35°C).

What is the average humidity in September in Rosemount?

In September, the average relative humidity in Rosemount, Ohio, is 76%.

What is the driest month in Rosemount?

September is the month with the least rainfall in Rosemount, Ohio. Rain falls for 13.3 days and accumulates 1.85" (47mm) of precipitation.

How many days does it rain in September in Rosemount?

In Rosemount, Ohio, in September, it is raining for 13.3 days, with typically 1.85" (47mm) of accumulated precipitation.

When it does not snow in Rosemount?

In Rosemount, Ohio, snow does not fall in May through September.

Does it snow in Rosemount in September?

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

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

In Rosemount, the average day length in September is 12h and 26min.

When is the sunrise / sunset in September in Rosemount?

On the first day of September in Rosemount, sunrise is at 7:00 am and sunset at 8:02 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 7:16 pm EDT.

How long on average sun shines in September in Rosemount?

In September, the average sunshine duration is 8.2h.

How high is the UV index in September in Rosemount?

In Rosemount, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Rosemount, OH

Average temperature in September - Rosemount, OH
  • Average high temperature in September: 78.4°F

The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is January (37.8°F).

  • Average low temperature in September: 56.7°F

The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).

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Average pressure in September
Rosemount, OH

Average pressure in September - Rosemount, OH
  • Average pressure in September: 30.04"Hg

The months with the highest atmospheric pressure are January and November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).

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Average wind speed in September
Rosemount, OH

Average wind speed in September - Rosemount, OH
  • Average wind speed in September: 4.9mph

The windiest months (with the highest average wind speed) are January and February (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).

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Average humidity in September
Rosemount, OH

Average humidity in September - Rosemount, OH
  • Average humidity in September: 76%

The months with the highest relative humidity are February and December (81%).
The month with the lowest relative humidity is August (75%).

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Average rainfall in September
Rosemount, OH

Average rainfall in September - Rosemount, OH
  • Average rainfall in September: 1.85"

The wettest month (with the highest rainfall) is May (3.19").
The driest month (with the least rainfall) is September (1.85").

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Average rainfall days in September
Rosemount, OH

Average rainfall days in September - Rosemount, OH
  • Average rainfall days in September: 13.3 days

The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is November (10.5 days).

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Average snowfall in September
Rosemount, OH

Average snowfall in September - Rosemount, OH
  • Average snowfall in September: 0"

The month with the highest snowfall is January (3.19").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in September
Rosemount, OH

Average snowfall days in September - Rosemount, OH
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (10.6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Rosemount, OH

Average daylight in September / Average sunshine in September - Rosemount, OH
  • Average daylight in September: 12h and 26min

The month with the longest days is June (Average daylight: 14h and 50min).
The month with the shortest days is December (Average daylight: 9h and 31min).

  • Average sunshine in September: 8h and 12min

The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).

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Average sunshine days in September
Rosemount, OH

Average sunshine days in September - Rosemount, OH
  • Average sunshine days in September: 15.1 days

The month with the most sunshine days is November (17.3 days).
The month with the least sunshine days is February (10 days).

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Average UV index in September
Rosemount, OH

Average UV index in September - Rosemount, OH
  • Average UV index in September: 4

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in September
Rosemount, OH

Average cloud cover in September - Rosemount, OH
  • Average cloud cover in September: 34

The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 30).

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Average visibility in September
Rosemount, OH

Average visibility in September - Rosemount, OH
  • Average visibility in September: 5mi

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

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