Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
With September's arrival, Saint John sees a decrease in average high-temperatures, moving from a moderately hot 77.9°F (25.5°C) in August to a comfortable 67.6°F (19.8°C). An average low-temperature of 49.1°F (9.5°C) marks the month of September in Saint John.Humidity
The average relative humidity in September is 62%.Rainfall
In Saint John, in September, during 11.3 rainfall days, 2.01" (51mm) of precipitation is typically accumulated. Throughout the year, in Saint John, North Dakota, there are 110.9 rainfall days, and 17.95" (456mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September is 12h and 34min.On the first day of September, sunrise is at 6:56 am and sunset at 8:20 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 7:18 pm CDT.
Sunshine
The average sunshine in September in Saint John is 8.5h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the ordinary person.Note: A maximum high UV index of 4 in September translates into the following recommendations:
Exercise prevention - Warding off sunburn is urged. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Frequently asked questions
What are the temperatures in Saint John in September?
What is the average humidity in September in Saint John?
How many days does it rain in September in Saint John?
When it does not snow in Saint John?
Does it snow in Saint John in September?
How many hours of daylight does Saint John have in September?
When is the sunrise / sunset in September in Saint John?
How many hours of sunshine does Saint John have in September?
What is the UV index reading in September in Saint John?
Average temperature in September
Saint John, ND
- Average high temperature in September: 67.6°F
The warmest month (with the highest average high temperature) is August (77.9°F).
The month with the lowest average high temperature is January (14.2°F).
- Average low temperature in September: 49.1°F
The month with the highest average low temperature is July (57.2°F).
The coldest month (with the lowest average low temperature) is January (0.5°F).
Average pressure in September
Saint John, ND
- Average pressure in September: 29.95"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
Saint John, ND
- Average wind speed in September: 9.8mph
The windiest month (with the highest average wind speed) is October (11mph).
The calmest month (with the lowest average wind speed) is August (8.5mph).
Average humidity in September
Saint John, ND
- Average humidity in September: 62%
The month with the highest relative humidity is January (93%).
The month with the lowest relative humidity is August (60%).
Average rainfall in September
Saint John, ND
- Average rainfall in September: 2.01"
The wettest month (with the highest rainfall) is June (3.27").
The driest month (with the least rainfall) is February (0.43").
Average rainfall days in September
Saint John, ND
- Average rainfall days in September: 11.3 days
The month with the highest number of rainy days is June (18.8 days).
The month with the least rainy days is February (2 days).
Average snowfall in September
Saint John, ND
- Average snowfall in September: 0"
The month with the highest snowfall is November (4.29").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Saint John, ND
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (15.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Saint John, ND
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).
- Average sunshine in September: 8h and 3min
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 6min).
Average sunshine days in September
Saint John, ND
- Average sunshine days in September: 16.8 days
The month with the most sunshine days is September (16.8 days).
The month with the least sunshine days is June (8.1 days).
Average UV index in September
Saint John, ND
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February and December (UV index 1).
Average cloud cover in September
Saint John, ND
- Average cloud cover in September: 30
The month with the most cloud cover is February (Cloud cover 70).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in September
Saint John, 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).
Saint John, North Dakota, USA
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