Jamestown
North Dakota, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Jamestown, ND

The first month of the autumn, September, is still a pleasant month in Jamestown, North Dakota, with average temperature varying between 70.9°F (21.6°C) and 46°F (7.8°C).

Temperature

In Jamestown, North Dakota, the average high-temperature decreases, from a moderately hot 81.9°F (27.7°C) in August, to a pleasant 70.9°F (21.6°C). In Jamestown, North Dakota, the average low-temperature is 46°F (7.8°C).

Rainfall

In Jamestown, during 7 rainfall days, 2.3" (57.4mm) of precipitation is typically accumulated. In Jamestown, North Dakota, during the entire year, the rain falls for 94 days and collects up to 19.6" (498.5mm) of precipitation.

Snowfall

In Jamestown, it doesn't snow. In October, it regularly snows. In Jamestown, North Dakota, during the entire year, snow aggregates up to 39.8" (1010.9mm).

Daylight

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

Sunshine

The average sunshine in September is 8h.

UV index

In Jamestown, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to the UV radiation for the ordinary person.
The average daily UV index of 5 in September transform into the following instructions:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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.

What is the temperature in September in Jamestown?

The average high-temperature, in September, in Jamestown, is 70.9°F (21.6°C), while the average low-temperature is 46°F (7.8°C).

How much does it rain in Jamestown in September?

In Jamestown, North Dakota, in September, during 7 rainfall days, 2.3" (57.4mm) of precipitation is typically accumulated.

Does it snow in Jamestown in September?

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

How many hours of daylight does Jamestown have in September?

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

How long on average sun shines in September in Jamestown?

In Jamestown, North Dakota, the average sunshine in September is 8h.

How high is the UV index in September in Jamestown?

In September, the average daily maximum UV index in Jamestown, North Dakota, is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from the exposure to the Sun's UV radiation.
Average temperature in September - Jamestown, ND
  • Average high temperature in September: 70.8°F

The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (19.2°F).

  • Average low temperature in September: 46°F

The month with the highest average low temperature is July (58.5°F).
The coldest month (with the lowest average low temperature) is January (1.2°F).

Average rainfall in September - Jamestown, ND
  • Average rainfall in September: 2.3"

The wettest month (with the highest rainfall) is June (3.5").
Driest months (with the lowest rainfall) are February and December (0.4").

Average rainfall days in September - Jamestown, ND
  • Average rainfall days in September: 7 days

The month with the highest number of rainy days is June (11 days).
Months with the lowest number of rainy days are October and November (6 days).

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

The month with the highest snowfall is January (9.7").
Months with the lowest snowfall are June, July, August and September (0").

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 shortest days is December (Average daylight: 8.6h).

  • Average sunshine in September: 8h

The month with most sunshine is July (Average sunshine: 11h).
Months with least sunshine are November and December (Average sunshine: 4).

Average UV index in September - Jamestown, ND
  • Average UV index in September: 5

Months with the highest UV index are June and July (UV index 8).
Months with the lowest UV index are January, November and December (UV index 1).