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
Arrival of September comes with a reduction in the average high-temperature, falling from a moderately hot 78.8°F (26°C) in August to a refreshing 67.3°F (19.6°C). Superior marks a considerable descent from the daytime apex, as the average temperature dips to a wintry 39.7°F (4.3°C) at night throughout September.Humidity
In September, the average relative humidity is 63%.Rainfall
In September, in Superior, the rain falls for 7.8 days. Throughout September, 0.59" (15mm) of precipitation is accumulated. In Superior, during the entire year, the rain falls for 152.1 days and collects up to 22.09" (561mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows in Superior. Throughout September, in the average 0.3 snowfall days, it receives 0.31" (8mm) of snow. Throughout the year, in Superior, there are 90.2 snowfall days, and 58.15" (1477mm) of snow is accumulated.Daylight
In Superior, Montana, the average length of the day in September is 12h and 32min.On the first day of September in Superior, sunrise is at 6:59 am and sunset at 8:18 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 7:20 pm MDT.
Sunshine
In Superior, Montana, the average sunshine in September is 9h.UV index
In Superior, the average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: In September, the maximum UV index of 3 translates into these guidelines:
Heed the precautions - It is counselled to guard against solar damage. Minimize direct exposure to the Sun during midday when its radiation is at its peak. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Frequently asked questions
What are the temperatures in Superior in September?
What is the average humidity in September in Superior?
How much does it rain in Superior in September?
When does it start to snow in Superior?
How many hours of daylight does Superior have in September?
When is the sunrise / sunset in September in Superior?
How long on average sun shines in September in Superior?
What is the UV index intensity in September in Superior?
Average temperature in September
Superior, MT
- Average high temperature in September: 67.3°F
The warmest months (with the highest average high temperature) are July and August (78.8°F).
The month with the lowest average high temperature is December (28.9°F).
- Average low temperature in September: 39.7°F
The month with the highest average low temperature is August (45.7°F).
The coldest month (with the lowest average low temperature) is December (16.2°F).
Average pressure in September
Superior, MT
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Superior, MT
- Average wind speed in September: 4.2mph
The windiest month (with the highest average wind speed) is April (4.9mph).
The calmest month (with the lowest average wind speed) is December (4mph).
Average humidity in September
Superior, MT
- Average humidity in September: 63%
The month with the highest relative humidity is January (93%).
The months with the lowest relative humidity are July and August (53%).
Average rainfall in September
Superior, MT
- Average rainfall in September: 0.59"
The wettest month (with the highest rainfall) is January (3.11").
The driest month (with the least rainfall) is August (0.39").
Average rainfall days in September
Superior, MT
- Average rainfall days in September: 7.8 days
The month with the highest number of rainy days is March (19.9 days).
The month with the least rainy days is August (5.9 days).
Average snowfall in September
Superior, MT
- Average snowfall in September: 0.31"
The month with the highest snowfall is February (15.12").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Superior, MT
- Average snowfall days in September: 0.3 days
The month with the highest number of snowfall days is December (20.4 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Superior, MT
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in September: 9h and 0min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in September
Superior, MT
- Average sunshine days in September: 20.3 days
The months with the most sunshine days are July and August (23.3 days).
The month with the least sunshine days is March (5.8 days).
Average UV index in September
Superior, MT
- Average UV index in September: 3
The month with the highest UV index is 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
Superior, MT
- Average cloud cover in September: 25
The month with the most cloud cover is February (Cloud cover 66).
The months with the least cloud cover are July and August (Cloud cover 15).
Average visibility in September
Superior, MT
- Average visibility in September: 6mi
The months with the highest visibility are June, July, August and September (6mi).
The months with the lowest visibility are January, February and December (3mi).
Superior, Montana, USA
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