September weather forecast and climate
Sixmile Crossing, MT

The first month of the autumn, September, is still a warm month in Sixmile Crossing, Montana, with temperature in the range of an average high of 74.3°F (23.5°C) and an average low of 56.3°F (13.5°C).

Temperature

In September, the average high-temperature decreases, from a moderately hot 84.7°F (29.3°C) in August, to a still warm 74.3°F (23.5°C). The average low-temperature, in Sixmile Crossing, Montana, is 56.3°F (13.5°C).

Humidity

In Sixmile Crossing, Montana, the average relative humidity in September is 43%.

Rainfall

In Sixmile Crossing, during 6.7 rainfall days, 0.51" (13mm) of precipitation is typically accumulated. Throughout the year, in Sixmile Crossing, there are 83.1 rainfall days, and 6.81" (173mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall in Sixmile Crossing.

Daylight

In Sixmile Crossing, the average length of the day in September is 12.5h.

Sunshine

The average sunshine in September is 10.5h.

UV index

In Sixmile Crossing, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to the UV radiation for the average person.
Note: The daily maximum UV index of 4 in September interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in September in Sixmile Crossing?

The average high-temperature, in September, is 74.3°F (23.5°C), while the average low-temperature is 56.3°F (13.5°C).

What is the average humidity in September in Sixmile Crossing?

In September, the average relative humidity in Sixmile Crossing, Montana, is 43%.

How much does it rain in Sixmile Crossing in September?

In Sixmile Crossing, in September, during 6.7 rainfall days, 0.51" (13mm) of precipitation is typically accumulated.

Does it snow in Sixmile Crossing in September?

In Sixmile Crossing, in September, it doesn't snow. In October, it regularly snows.

When it does not snow in Sixmile Crossing?

June through September are months without snowfall in Sixmile Crossing, Montana.

What is the average length of the day in September in Sixmile Crossing?

The average length of the day in September in Sixmile Crossing is 12.5h.

How many hours of sunshine does Sixmile Crossing have in September?

The average sunshine in September in Sixmile Crossing, Montana, is 10.5h.

What is the UV index intensity in September in Sixmile Crossing?

In Sixmile Crossing, Montana, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium health risk from unprotected exposure to the UV radiation.
Average temperature in September - Sixmile Crossing, MT
  • Average high temperature in September: 74.3°F

The warmest month (with the highest average high temperature) is July (86.7°F).
The month with the lowest average high temperature is January (28.8°F).

  • Average low temperature in September: 56.3°F

The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (15.1°F).

Average pressure in September - Sixmile Crossing, MT
  • Average pressure in September: 29.92"

Months with the highest atmospheric pressure are January and February (30.14").
The month with the lowest atmospheric pressure is June (29.83").

Average wind speed in September - Sixmile Crossing, MT
  • Average wind speed in September: 9.8mph

The windiest month (with the highest average wind speed) is April (11.2mph).
The calmest months (with the lowest average wind speed) are February and August (9.3mph).

Average humidity in September - Sixmile Crossing, MT
  • Average humidity in September: 43%

The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is August (39%).

Average rainfall in September - Sixmile Crossing, MT
  • Average rainfall in September: 0.51"

The wettest month (with the highest rainfall) is May (1.1").
The driest months (with the least rainfall) are November and December (0.28").

Average rainfall days in September - Sixmile Crossing, MT
  • Average rainfall days in September: 6.7 days

The month with the highest number of rainy days is May (11.3 days).
The month with the least rainy days is December (2.6 days).

Average snowfall in September - Sixmile Crossing, MT
  • Average snowfall in September: 0"

The month with the highest snowfall is February (2.2").
Months with the least snowfall are June, July, August and September (0").

Average snowfall days in September - Sixmile Crossing, MT
  • Average snowfall days in September: 0.1 days

The month with the highest number of snowfall days is January (10.1 days).
Months with the least snowfall days are June, July and August (0 days).

Average daylight in September / Average sunshine in September - Sixmile Crossing, MT
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.7h).
The month with the shortest days is December (Average daylight: 8.8h).

  • Average sunshine in September: 10.5h

The month with the most sunshine is July (Average sunshine: 11.8h).
Months with the least sunshine are January, February and December (Average sunshine: 5.1).

Average sunshine days in September - Sixmile Crossing, MT
  • Average sunshine days in September: 21.5 days

The month with the most sunshine days is November (22.5 days).
The month with the least sunshine days is April (16.5 days).

Average UV index in September - Sixmile Crossing, MT
  • Average UV index in September: 4

The month with the highest UV index is July (UV index 7).
Months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover in September - Sixmile Crossing, MT
  • Average cloud cover in September: 21

Months with the most cloud cover are February and December (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 15).

Average visibility in September - Sixmile Crossing, MT
  • Average visibility in September: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).