September weather forecastCasselton, ND
September
Weather in September
The advent of September introduces a noticeable shift in Casselton's climatic conditions. The scenic allure of fall takes effect, accompanied by a significant dip in temperature to a high of 71.8°F (22.1°C). The local parks and streets begin their annual transformation, with the greenery giving way to an array of warm, vibrant colors. Although it marks the beginning of the end of summer, September is a beautifully transitional month that offers a mild prelude to the colder months forthcoming. Anticipation builds for the familiar chill and beauty of October, making September a bittersweet farewell to the warmth and energy of summer.Temperature
Observing a mild shift, the average high-temperature during September reduces from August's moderately hot 80.8°F (27.1°C) to a pleasant 71.8°F (22.1°C). Casselton usually reports an average low-temperature of 52.7°F (11.5°C) during the month of September.Humidity
With an average relative humidity of 62%, September is the least humid month.Rainfall
In September, the rain falls for 8.3 days. Throughout September, 1.54" (39mm) of precipitation is accumulated. In Casselton, during the entire year, the rain falls for 102.6 days and collects up to 17.8" (452mm) of precipitation.Snowfall
In Casselton, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 32min.On the first day of September, sunrise is at 6:49 am and sunset at 8:07 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 7:09 pm CDT.
Sunshine
In September, the average sunshine in Casselton is 8.8h.UV index
In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index of 4 during September translates into the following directions:
Prioritize safety - Recommendations to avert sunburn are shared. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Casselton, ND
- Average high temperature in September: 71.8°F
The warmest months (with the highest average high temperature) are July and August (80.8°F).
The month with the lowest average high temperature is January (16.7°F).
- Average low temperature in September: 52.7°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (3.2°F).
Average pressure in September
Casselton, 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 (29.86"Hg).
Average wind speed in September
Casselton, ND
- Average wind speed in September: 9.8mph
The windiest month (with the highest average wind speed) is October (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (8.1mph).
Average humidity in September
Casselton, ND
- Average humidity in September: 62%
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is September (62%).
Average rainfall in September
Casselton, ND
- Average rainfall in September: 1.54"
The wettest month (with the highest rainfall) is June (3.46").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days in September
Casselton, ND
- Average rainfall days in September: 8.3 days
The month with the highest number of rainy days is June (15.9 days).
The month with the least rainy days is February (1.9 days).
Average snowfall in September
Casselton, ND
- Average snowfall in September: 0"
The month with the highest snowfall is December (3.74").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Casselton, ND
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (15.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Casselton, ND
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in September: 8h and 48min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The months with the least sunshine are January and December (Average sunshine: 3h and 30min).
Average sunshine days in September
Casselton, 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 (11 days).
Average UV index in September
Casselton, 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, November and December (UV index 1).
Average cloud cover in September
Casselton, ND
- Average cloud cover in September: 28
The months with the most cloud cover are January and February (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 24).
Average visibility in September
Casselton, 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).
