September weather forecastLolo, MT
September
Weather in September
The first month of the autumn, September, is also an agreeable month in Lolo, Montana, with an average temperature ranging between max 68.5°F (20.3°C) and min 41.2°F (5.1°C).Temperature
Lolo in September experiences a subtle temperature decline, with average high-temperatures reducing from a warm 79.9°F (26.6°C) in August to an agreeable 68.5°F (20.3°C). Lolo reports a steady low-temperature average of 41.2°F (5.1°C) throughout September, revealing a large deviation from the daytime high.Humidity
In Lolo, the average relative humidity in September is 57%.Rainfall
In Lolo, in September, during 5 rainfall days, 0.28" (7mm) of precipitation is typically accumulated. Throughout the year, in Lolo, there are 91 rainfall days, and 3.9" (99mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall in Lolo. September is the first month it typically snows in Lolo, Montana. Throughout September, in the average 0.3 snowfall days, it receives 0.2" (5mm) of snow. Throughout the year, in Lolo, there are 50.6 snowfall days, and 9.21" (234mm) of snow is accumulated.Daylight
The average length of the day in September in Lolo is 12h and 32min.On the first day of September, sunrise is at 6:57 am and sunset at 8:14 pm. On the last day of the month, sunrise is at 7:34 am and sunset at 7:17 pm MDT.
Sunshine
In Lolo, the average sunshine in September is 9.5h.UV index
In September, the average daily maximum UV index in Lolo, Montana, is 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: A maximum high UV index of 3 in September translates into the following recommendations:
Exercise caution. Those with pale skin may experience burns in less than half an hour. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Lolo, MT
- Average high temperature in September: 68.5°F
The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is December (28.6°F).
- Average low temperature in September: 41.2°F
The month with the highest average low temperature is August (47.1°F).
The coldest month (with the lowest average low temperature) is December (16.2°F).
Average pressure in September
Lolo, MT
- Average pressure in September: 29.99"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
Lolo, MT
- Average wind speed in September: 4.3mph
The windiest month (with the highest average wind speed) is April (5mph).
The calmest month (with the lowest average wind speed) is August (4mph).
Average humidity in September
Lolo, MT
- Average humidity in September: 57%
The month with the highest relative humidity is January (89%).
The months with the lowest relative humidity are July and August (50%).
Average rainfall in September
Lolo, MT
- Average rainfall in September: 0.28"
The wettest month (with the highest rainfall) is April (0.51").
The driest month (with the least rainfall) is July (0.2").
Average rainfall days in September
Lolo, MT
- Average rainfall days in September: 5 days
The month with the highest number of rainy days is March (10.8 days).
The month with the least rainy days is August (4 days).
Average snowfall in September
Lolo, MT
- Average snowfall in September: 0.2"
The month with the highest snowfall is February (2.56").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Lolo, MT
- Average snowfall days in September: 0.3 days
The month with the highest number of snowfall days is February (11 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Lolo, MT
- 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: 9h and 30min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 6min).
Average sunshine days in September
Lolo, MT
- Average sunshine days in September: 22.3 days
The month with the most sunshine days is July (24.2 days).
The month with the least sunshine days is February (14.3 days).
Average UV index in September
Lolo, 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 November and December (UV index 1).
Average cloud cover in September
Lolo, MT
- Average cloud cover in September: 22
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 13).
Average visibility in September
Lolo, 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 and December (4mi).
