September weather forecastLustre, MT
September
Weather in September
The first month of the autumn, September, is also an agreeable month in Lustre, Montana, with an average temperature fluctuating between 71.6°F (22°C) and 54.3°F (12.4°C).Temperature
The onset of September is marked by a decrease in temperature, transitioning from a moderately hot 82.9°F (28.3°C) in August to an agreeable 71.6°F (22°C). September nights are marked by an average low-temperature of 54.3°F (12.4°C).Humidity
In Lustre, the average relative humidity in September is 46%.Rainfall
In Lustre, in September, it is raining for 8 days, with typically 1.5" (38mm) of accumulated precipitation. In Lustre, during the entire year, the rain falls for 95.7 days and collects up to 11.69" (297mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day in Lustre is 12h and 34min.On the first day of the month, sunrise is at 6:22 am and sunset at 7:44 pm. On the last day of September, sunrise is at 7:02 am and sunset at 6:43 pm MDT.
Sunshine
In September, the average sunshine is 10.1h.UV index
In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: In September, a daily UV index of 4 turns into the following recommendations:
Adopt protective measures - Suggestions to resist sunburn are offered. Around midday, solar radiation is most harmful; hence, exposure should be limited. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Caution! The reflection of snow can nearly 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
Lustre, MT
- Average high temperature in September: 71.6°F
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is February (23°F).
- Average low temperature in September: 54.3°F
The month with the highest average low temperature is July (63.7°F).
The coldest months (with the lowest average low temperature) are January and February (10.2°F).
Average pressure in September
Lustre, MT
- Average pressure in September: 29.93"Hg
The month with the highest atmospheric pressure is February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).
Average wind speed in September
Lustre, MT
- Average wind speed in September: 10.3mph
The windiest month (with the highest average wind speed) is April (11.2mph).
The calmest month (with the lowest average wind speed) is February (8.8mph).
Average humidity in September
Lustre, MT
- Average humidity in September: 46%
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is August (42%).
Average rainfall in September
Lustre, MT
- Average rainfall in September: 1.5"
The wettest month (with the highest rainfall) is May (1.89").
The driest month (with the least rainfall) is January (0.51").
Average rainfall days in September
Lustre, MT
- Average rainfall days in September: 8 days
The month with the highest number of rainy days is May (13.1 days).
The month with the least rainy days is February (3.8 days).
Average snowfall in September
Lustre, MT
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.82").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Lustre, MT
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is December (13.6 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Lustre, 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: 10h and 6min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).
Average sunshine days in September
Lustre, MT
- Average sunshine days in September: 21.4 days
The month with the most sunshine days is September (21.4 days).
The month with the least sunshine days is April (13.8 days).
Average UV index in September
Lustre, MT
- Average UV index in September: 4
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Lustre, MT
- Average cloud cover in September: 24
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 16).
Average visibility in September
Lustre, 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).
