September weather forecast and climate
Jamestown, ND

Weather in September

September, the first month of the autumn, in Jamestown, is still a pleasant month, with temperature in the range of an average low of 51.3°F (10.7°C) and an average high of 70.7°F (21.5°C).

Temperature

In September, the average high-temperature drops, from a moderately hot 81°F (27.2°C) in August, to an agreeable 70.7°F (21.5°C). The average low-temperature, in Jamestown, North Dakota, is 51.3°F (10.7°C).

Humidity

The average relative humidity in Jamestown is 61%.

Rainfall

In Jamestown, during September, the rain falls for 8.5 days and regularly aggregates up to 1.42" (36mm) of precipitation. Throughout the year, in Jamestown, there are 96.6 rainfall days, and 16.77" (426mm) of precipitation is accumulated.

Snowfall

In Jamestown snow does not fall in June through September.

Daylight

The average length of the day in September is 12.5h.

Sunshine

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

UV index

The average daily maximum UV index in Jamestown is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to the UV radiation for the ordinary person.
Note: The daily maximum UV index of 4 interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in September in Jamestown?

In September, in Jamestown, the average high-temperature is 70.7°F (21.5°C), and the average low-temperature is 51.3°F (10.7°C).

What is the average humidity in September in Jamestown?

In September, the average relative humidity in Jamestown, North Dakota, is 61%.

How much does it rain in Jamestown in September?

In Jamestown, North Dakota, in September, it is raining for 8.5 days, with typically 1.42" (36mm) of accumulated precipitation.

Does it snow in Jamestown in September?

In Jamestown, North Dakota, in September, it doesn't snow. In October, it regularly snows.

When it does not snow in Jamestown?

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

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

In Jamestown, North Dakota, the average length of the day in September is 12.5h.

How many hours of sunshine does Jamestown have in September?

The average sunshine in September in Jamestown, North Dakota, is 8.7h.

What is the UV index intensity in September in Jamestown?

In Jamestown, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate vulnerability from unprotected exposure to the UV radiation.

Average temperature in September
Jamestown, ND

Average temperature in September - Jamestown, ND
  • Average high temperature in September: 70.7°F

The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (17.8°F).

  • Average low temperature in September: 51.3°F

The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (3.6°F).

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Average pressure in September
Jamestown, ND

Average pressure in September - Jamestown, ND
  • Average pressure in September: 29.96"

The month with the highest atmospheric pressure is February (30.18").
The month with the lowest atmospheric pressure is June (29.85").

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Average wind speed in September
Jamestown, ND

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

The windiest month (with the highest average wind speed) is October (11.2mph).
The calmest month (with the lowest average wind speed) is August (8.5mph).

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Average humidity in September
Jamestown, ND

Average humidity in September - Jamestown, ND
  • Average humidity in September: 61%

The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is August (59%).

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Average rainfall in September
Jamestown, ND

Average rainfall in September - Jamestown, ND
  • Average rainfall in September: 1.42"

The wettest month (with the highest rainfall) is June (2.95").
The driest month (with the least rainfall) is January (0.55").

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Average rainfall days in September
Jamestown, ND

Average rainfall days in September - Jamestown, ND
  • Average rainfall days in September: 8.5 days

The month with the highest number of rainy days is June (15.8 days).
The month with the least rainy days is February (1.6 days).

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Average snowfall in September
Jamestown, ND

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

The month with the highest snowfall is December (4.69").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Jamestown, ND

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

The month with the highest number of snowfall days is December (13.3 days).
Months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in September / Average sunshine in September - Jamestown, ND
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.8h).
The month with the shortest days is December (Average daylight: 8.6h).

  • Average sunshine in September: 8.7h

The month with the most sunshine is July (Average sunshine: 11h).
The month with the least sunshine is January (Average sunshine: 3.6h).

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Average sunshine days in September
Jamestown, ND

Average sunshine days in September - Jamestown, ND
  • Average sunshine days in September: 19.8 days

The month with the most sunshine days is September (19.8 days).
The month with the least sunshine days is June (12 days).

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Average UV index in September
Jamestown, ND

Average UV index in September - Jamestown, ND
  • Average UV index in September: 4

Months with the highest UV index are June and July (UV index 6).
Months with the lowest UV index are January, February and November (UV index 1).

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Average cloud cover in September
Jamestown, ND

Average cloud cover in September - Jamestown, ND
  • Average cloud cover in September: 26

The month with the most cloud cover is February (Cloud cover 63).
Months with the least cloud cover are July and August (Cloud cover 24).

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Average visibility in September
Jamestown, ND

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

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

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