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
Ballantine, Montana, in September experiences a subtle temperature decline, with average high-temperatures reducing from a warm 83.1°F (28.4°C) in August to an agreeable 73.2°F (22.9°C). In September, Ballantine experiences an average nighttime temperature of 52.5°F (11.4°C).Humidity
In Ballantine, the average relative humidity in September is 44%.Rainfall
In Ballantine, during September, the rain falls for 9.1 days and regularly aggregates up to 0.98" (25mm) of precipitation. Throughout the year, there are 128.5 rainfall days, and 14.69" (373mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.2 snowfall days, it receives 0.12" (3mm) of snow. In Ballantine, during the entire year, snow falls for 64.5 days and aggregates up to 31.18" (792mm) of snow.Daylight
The average length of the day in September is 12h and 31min.On the first day of September in Ballantine, Montana, sunrise is at 6:34 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 6:53 pm MDT.
Sunshine
The average sunshine in September is 10.3h.UV index
In Ballantine, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: The daily high UV index of 4 in September translates into this advice:
Take measures. Individuals with light skin might experience burns in under 30 minutes. When the Sun is at its strongest around midday, find shade and limit exposure. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Ballantine?
What is the average humidity in September in Ballantine?
How much does it rain in Ballantine in September?
When does it start snowing in Ballantine?
What is the average length of the day in September in Ballantine?
When is the sunrise / sunset in September in Ballantine?
How many hours of sunshine does Ballantine have in September?
What is the UV index reading in September in Ballantine?
Average temperature in September
Ballantine, MT
- Average high temperature in September: 73.2°F
The warmest month (with the highest average high temperature) is July (85.3°F).
The month with the lowest average high temperature is December (31.1°F).
- Average low temperature in September: 52.5°F
The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is February (18.3°F).
Average pressure in September
Ballantine, MT
- Average pressure in September: 29.94"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in September
Ballantine, MT
- Average wind speed in September: 8mph
The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is July (7.1mph).
Average humidity in September
Ballantine, MT
- Average humidity in September: 44%
The month with the highest relative humidity is January (76%).
The month with the lowest relative humidity is August (40%).
Average rainfall in September
Ballantine, MT
- Average rainfall in September: 0.98"
The wettest month (with the highest rainfall) is May (2.13").
The driest month (with the least rainfall) is July (0.71").
Average rainfall days in September
Ballantine, MT
- Average rainfall days in September: 9.1 days
The month with the highest number of rainy days is May (17.6 days).
The month with the least rainy days is January (6.3 days).
Average snowfall in September
Ballantine, MT
- Average snowfall in September: 0.12"
The month with the highest snowfall is February (6.5").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Ballantine, MT
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is February (13.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Ballantine, 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: 10h and 2min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 12min).
Average sunshine days in September
Ballantine, MT
- Average sunshine days in September: 18.8 days
The month with the most sunshine days is September (18.8 days).
The month with the least sunshine days is April (9.9 days).
Average UV index in September
Ballantine, MT
- Average UV index in September: 4
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Ballantine, MT
- Average cloud cover in September: 21
The month with the most cloud cover is February (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 15).
Average visibility in September
Ballantine, MT
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Ballantine, Montana, USA
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