September weather forecastLakeside, MT
September
Weather in September
September, the first month of the autumn in Lakeside, is also an enjoyable month, with an average temperature fluctuating between 66.2°F (19°C) and 41.9°F (5.5°C).Temperature
With September's arrival, Lakeside's weather changes as the average high-temperature falls from a warm 76.5°F (24.7°C) in August to a refreshing 66.2°F (19°C). During September, Lakeside reports a marked contrast from daily peak temperatures, with an average nighttime reading of 41.9°F (5.5°C).Humidity
The average relative humidity in September is 61%.Rainfall
In Lakeside, during September, the rain falls for 10.5 days and regularly aggregates up to 1.1" (28mm) of precipitation. Throughout the year, there are 153.5 rainfall days, and 19.76" (502mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, September through December. September is the first month it typically snows. Throughout September, in the average 0.2 snowfall days, it receives 0.31" (8mm) of snow. In Lakeside, Montana, during the entire year, snow falls for 94.5 days and aggregates up to 52.6" (1336mm) of snow.Daylight
The average length of the day in September is 12h and 33min.On the first day of September, sunrise is at 6:56 am and sunset at 8:17 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 7:17 pm MDT.
Sunshine
The average sunshine in September is 9.3h.UV index
In September, the average daily maximum UV index in Lakeside is 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The UV index of 3 during September translates into the following guidance:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. During bright days, sunglasses that offer UVA and UVB defense are recommended. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Lakeside, MT
- Average high temperature in September: 66.2°F
The warmest month (with the highest average high temperature) is July (76.6°F).
The month with the lowest average high temperature is December (27.5°F).
- Average low temperature in September: 41.9°F
The month with the highest average low temperature is July (48.7°F).
The coldest month (with the lowest average low temperature) is December (16.7°F).
Average pressure in September
Lakeside, MT
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Lakeside, MT
- Average wind speed in September: 4mph
The windiest month (with the highest average wind speed) is April (4.9mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).
Average humidity in September
Lakeside, MT
- Average humidity in September: 61%
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is August (53%).
Average rainfall in September
Lakeside, MT
- Average rainfall in September: 1.1"
The wettest month (with the highest rainfall) is June (2.36").
The driest months (with the least rainfall) are July and August (0.63").
Average rainfall days in September
Lakeside, MT
- Average rainfall days in September: 10.5 days
The month with the highest number of rainy days is April (18.8 days).
The month with the least rainy days is August (7.2 days).
Average snowfall in September
Lakeside, MT
- Average snowfall in September: 0.31"
The month with the highest snowfall is December (12.32").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Lakeside, MT
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is December (20.1 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Lakeside, MT
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in September: 9h and 18min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in September
Lakeside, MT
- Average sunshine days in September: 17.4 days
The month with the most sunshine days is July (20.2 days).
The months with the least sunshine days are February and March (7.8 days).
Average UV index in September
Lakeside, 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 January, February, November and December (UV index 1).
Average cloud cover in September
Lakeside, MT
- Average cloud cover in September: 23
The month with the most cloud cover is January (Cloud cover 59).
The months with the least cloud cover are July and August (Cloud cover 15).
Average visibility in September
Lakeside, MT
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March and December (4mi).
