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
September brings a decrease in the average high-temperature, falling from August's warm 73.9°F (23.3°C) to an enjoyable 63.7°F (17.6°C). September nights are characterized by a significant departure from the daytime highs, dropping to an average temperature of 39.4°F (4.1°C).Humidity
In Wise River, the average relative humidity in September is 56%.Rainfall
In Wise River, during September, the rain falls for 8.7 days and regularly aggregates up to 1.1" (28mm) of precipitation. In Wise River, during the entire year, the rain falls for 128.3 days and collects up to 16.57" (421mm) of precipitation.Snowfall
January through June, September through December are months with snowfall in Wise River. September is the first month it typically snows in Wise River. Throughout September, in the average 1 snowfall days, it receives 1.81" (46mm) of snow. In Wise River, during the entire year, snow falls for 110.5 days and aggregates up to 59.8" (1519mm) of snow.Daylight
In September, the average length of the day is 12h and 31min.On the first day of September, sunrise is at 6:53 am and sunset at 8:09 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 7:13 pm MDT.
Sunshine
In September, the average sunshine in Wise River is 9.5h.UV index
In Wise River, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the ordinary person.Note: The maximum UV index of 3 during September leads to these instructions:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Frequently asked questions
What is the usual temperature for Wise River in September?
What is the average humidity in September in Wise River?
How much does it rain in Wise River in September?
When does it start snowing in Wise River?
How many hours of daylight does Wise River have in September?
What time are sunrise and sunset in September in Wise River?
How many hours of sunshine does Wise River have in September?
What is the UV index intensity in September in Wise River?
Average temperature in September
Wise River, MT
- Average high temperature in September: 63.7°F
The warmest month (with the highest average high temperature) is July (75.4°F).
The month with the lowest average high temperature is December (25.3°F).
- Average low temperature in September: 39.4°F
The month with the highest average low temperature is July (45.3°F).
The coldest month (with the lowest average low temperature) is December (10.4°F).
Average pressure in September
Wise River, MT
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is January (30.21"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Wise River, MT
- Average wind speed in September: 5.3mph
The windiest month (with the highest average wind speed) is January (6.7mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in September
Wise River, MT
- Average humidity in September: 56%
The month with the highest relative humidity is February (89%).
The months with the lowest relative humidity are July and August (50%).
Average rainfall in September
Wise River, MT
- Average rainfall in September: 1.1"
The wettest months (with the highest rainfall) are May and June (2.44").
The driest month (with the least rainfall) is January (0.83").
Average rainfall days in September
Wise River, MT
- Average rainfall days in September: 8.7 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is February (6.8 days).
Average snowfall in September
Wise River, MT
- Average snowfall in September: 1.81"
The month with the highest snowfall is February (10.51").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Wise River, MT
- Average snowfall days in September: 1 days
The month with the highest number of snowfall days is February (19.6 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Wise River, MT
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 9h and 3min
The month with the most sunshine is July (Average sunshine: 11h and 36min).
The month with the least sunshine is January (Average sunshine: 5h and 18min).
Average sunshine days in September
Wise River, MT
- Average sunshine days in September: 17.5 days
The month with the most sunshine days is August (17.8 days).
The month with the least sunshine days is April (8 days).
Average UV index in September
Wise River, MT
- Average UV index in September: 3
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are February and December (UV index 1).
Average cloud cover in September
Wise River, MT
- Average cloud cover in September: 22
The month with the most cloud cover is February (Cloud cover 55).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in September
Wise River, MT
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March and December (4mi).
Wise River, Montana, USA
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