September weather forecast
Petersburg, ND

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Weather in September

The first month of the autumn, September, is also an agreeable month in Petersburg, North Dakota, with temperature in the range of an average low of 51.4°F (10.8°C) and an average high of 70°F (21.1°C).

Temperature

September implies a gentle temperature shift, with average high-temperatures reducing from August's moderately hot 79.9°F (26.6°C) to an agreeable 70°F (21.1°C). The nighttime temperature dips to a cool 51.4°F (10.8°C) on average during September.

Humidity

In Petersburg, the average relative humidity in September is 62%.

Rainfall

In Petersburg, in September, it is raining for 8.3 days, with typically 1.54" (39mm) of accumulated precipitation. Throughout the year, there are 91.5 rainfall days, and 15.31" (389mm) of precipitation is accumulated.

Snowfall

In Petersburg, North Dakota, snow does not fall in June through September.

Daylight

The average length of the day in September is 12h and 34min.
On the first day of the month, sunrise is at 6:51 am and sunset at 8:12 pm. On the last day of September, sunrise is at 7:30 am and sunset at 7:12 pm CDT.

Sunshine

In Petersburg, the average sunshine in September is 8.7h.

UV index

The average daily maximum UV index in September in Petersburg is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: A daily high UV index of 4 in September leads to these guidelines:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Updated: Aug 28, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average September temperature?

In September, in Petersburg, the average high-temperature is 70°F (21.1°C), and the average low-temperature is 51.4°F (10.8°C).

What is the average humidity in September?

The average relative humidity in September is 62%.

How much does it rain in September?

In Petersburg, during September, the rain falls for 8.3 days and regularly aggregates up to 1.54" (39mm) of precipitation.

When it does not snow?

June through September are months without snowfall.

Does it snow in September?

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

What is the average length of the day in September?

The average day length in September is 12h and 34min.

When are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:51 am and sunset at 8:12 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 7:12 pm CDT.

How long on average sun shines in September?

In September, the average sunshine duration is 8.7h.

What is the UV index reading in September?

In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium hazard to health 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
Petersburg, ND

Average temperature in September - Petersburg, ND
  • Average high temperature in September: 70°F

The warmest month (with the highest average high temperature) is August (79.9°F).
The month with the lowest average high temperature is January (15.4°F).

  • Average low temperature in September: 51.4°F

The month with the highest average low temperature is July (60.3°F).
The coldest month (with the lowest average low temperature) is January (1.4°F).

Average pressure in September
Petersburg, ND

Average pressure in September - Petersburg, ND
  • Average pressure in September: 29.96"Hg

The month with the highest atmospheric pressure is February (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).

Average wind speed in September
Petersburg, ND

Average wind speed in September - Petersburg, ND
  • Average wind speed in September: 10.1mph

The windiest month (with the highest average wind speed) is October (11mph).
The calmest months (with the lowest average wind speed) are July and August (8.5mph).

Average humidity in September
Petersburg, ND

Average humidity in September - Petersburg, ND
  • Average humidity in September: 62%

The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is August (60%).

Average rainfall in September
Petersburg, ND

Average rainfall in September - Petersburg, ND
  • Average rainfall in September: 1.54"

The wettest month (with the highest rainfall) is June (2.99").
The driest month (with the least rainfall) is January (0.35").

Average rainfall days in September
Petersburg, ND

Average rainfall days in September - Petersburg, ND
  • Average rainfall days in September: 8.3 days

The month with the highest number of rainy days is June (16.3 days).
The month with the least rainy days is February (1.2 days).

Average snowfall in September
Petersburg, ND

Average snowfall in September - Petersburg, ND
  • Average snowfall in September: 0"

The month with the highest snowfall is December (3.58").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Petersburg, ND

Average snowfall days in September - Petersburg, ND
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is December (11.5 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Petersburg, ND

Average daylight in September / Average sunshine in September - Petersburg, ND
  • Average daylight in September: 12h and 4min

The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 30min).

  • Average sunshine in September: 8h and 4min

The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).

Average sunshine days in September
Petersburg, ND

Average sunshine days in September - Petersburg, ND
  • Average sunshine days in September: 20.3 days

The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is June (10.8 days).

Average UV index in September
Petersburg, ND

Average UV index in September - Petersburg, ND
  • 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, February and November (UV index 1).

Average cloud cover in September
Petersburg, ND

Average cloud cover in September - Petersburg, ND
  • Average cloud cover in September: 29

The months with the most cloud cover are January and February (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 24).

Average visibility in September
Petersburg, ND

Average visibility in September - Petersburg, ND
  • Average visibility in September: 6mi

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

Petersburg, North Dakota, USA

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