September weather forecast and climate
Anaconda, MT

Weather in September

The first month of the autumn, September, is still a comfortable month in Anaconda, Montana, with average temperature fluctuating between 63.7°F (17.6°C) and 39°F (3.9°C).

Temperature

In September, the average high-temperature drops, from a warm 73.9°F (23.3°C) in August, to an enjoyable 63.7°F (17.6°C). In Anaconda, in September, the average low-temperature is 39°F (3.9°C).

Humidity

The average relative humidity in Anaconda, Montana, is 56%.

Rainfall

In Anaconda, it is raining for 9.9 days, with typically 1.18" (30mm) of accumulated precipitation. In Anaconda, during the entire year, the rain falls for 139.3 days and collects up to 18.74" (476mm) of precipitation.

Snowfall

January through June, September through December are months with snowfall. September is the first month it typically snows in Anaconda. Throughout September, in the average 1.4 snowfall days, it receives 1.61" (41mm) of snow. In Anaconda, during the entire year, snow falls for 117.3 days, and aggregates up to 65.47" (1663mm) of snow.

Daylight

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

Sunshine

In September, the average sunshine in Anaconda is 9.5h.

UV index

The average daily maximum UV index in Anaconda is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to the UV radiation for the ordinary person.
Note: The average daily UV index of 3 in September transform into the following instructions:
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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the average humidity in September in Anaconda?

The average relative humidity in September in Anaconda, Montana, is 56%.

How much does it rain in Anaconda in September?

In September, the rain falls for 9.9 days. Throughout September, 1.18" (30mm) of precipitation is accumulated.

When does it start snowing in Anaconda?

September is the first month it typically snows in Anaconda, Montana. Throughout September, in the average 1.4 snowfall days, it receives 1.61" (41mm) of snow.

How many hours of daylight does Anaconda have in September?

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

How many hours of sunshine does Anaconda have in September?

The average sunshine in September in Anaconda, Montana, is 9.5h.

What is the UV index intensity in September in Anaconda?

The average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a medium hazard to health from unsafe exposure to the Sun's UV rays.

Average temperature in September
Anaconda, MT

Average temperature in September - Anaconda, MT
  • Average high temperature in September: 63.7°F

The warmest month (with the highest average high temperature) is July (75.4°F).
The month with the lowest average high temperature is December (25.3°F).

  • Average low temperature in September: 39°F

The month with the highest average low temperature is August (44.6°F).
The coldest month (with the lowest average low temperature) is December (10.8°F).

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Average pressure in September
Anaconda, MT

Average pressure in September - Anaconda, MT
  • Average pressure in September: 29.99"

The month with the highest atmospheric pressure is January (30.21").
The month with the lowest atmospheric pressure is June (29.92").

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Average wind speed in September
Anaconda, MT

Average wind speed in September - Anaconda, MT
  • Average wind speed in September: 5.3mph

The windiest months (with the highest average wind speed) are January and November (6.6mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).

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Average humidity in September
Anaconda, MT

Average humidity in September - Anaconda, MT
  • Average humidity in September: 56%

The month with the highest relative humidity is February (89%).
Months with the lowest relative humidity are July and August (50%).

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Average rainfall in September
Anaconda, MT

Average rainfall in September - Anaconda, MT
  • Average rainfall in September: 1.18"

The wettest month (with the highest rainfall) is June (2.87").
The driest months (with the least rainfall) are January and December (0.94").

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Average rainfall days in September
Anaconda, MT

Average rainfall days in September - Anaconda, MT
  • Average rainfall days in September: 9.9 days

The month with the highest number of rainy days is May (19.4 days).
The month with the least rainy days is November (7.9 days).

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Average snowfall in September
Anaconda, MT

Average snowfall in September - Anaconda, MT
  • Average snowfall in September: 1.61"

The month with the highest snowfall is February (11.93").
Months with the least snowfall are July and August (0").

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Average snowfall days in September
Anaconda, MT

Average snowfall days in September - Anaconda, MT
  • Average snowfall days in September: 1.4 days

The month with the highest number of snowfall days is February (20.2 days).
Months with the least snowfall days are July and August (0 days).

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Average daylight in September /
Average sunshine in September
Anaconda, MT

Average daylight in September / Average sunshine in September - Anaconda, 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: 8.7h).

  • Average sunshine in September: 9.5h

The month with the most sunshine is July (Average sunshine: 11.6h).
Months with the least sunshine are January and December (Average sunshine: 5.4).

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Average sunshine days in September
Anaconda, MT

Average sunshine days in September - Anaconda, MT
  • Average sunshine days in September: 17.2 days

The month with the most sunshine days is September (17.2 days).
Months with the least sunshine days are February and April (7.2 days).

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Average UV index in September
Anaconda, MT

Average UV index in September - Anaconda, MT
  • Average UV index in September: 3

The month with the highest UV index is July (UV index 5).
Months with the lowest UV index are February and December (UV index 1).

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Average cloud cover in September
Anaconda, MT

Average cloud cover in September - Anaconda, MT
  • Average cloud cover in September: 22

The month with the most cloud cover is February (Cloud cover 55).
The month with the least cloud cover is August (Cloud cover 16).

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Average visibility in September
Anaconda, MT

Average visibility in September - Anaconda, MT
  • Average visibility in September: 6mi

Months with the highest visibility are May, June, July, August, September and October (6mi).
Months with the lowest visibility are January, February, March and December (4mi).

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