September weather forecast and climate
Opheim, MT

Weather in September

The first month of the autumn, September, is also an agreeable month in Opheim, Montana, with average temperature fluctuating between 70.2°F (21.2°C) and 53.8°F (12.1°C).

Temperature

In Opheim, the average high-temperature drops, from a warm 81.7°F (27.6°C) in August, to an agreeable 70.2°F (21.2°C). In September, the average low-temperature is 53.8°F (12.1°C).

Humidity

In September, the average relative humidity is 47%.

Rainfall

In September, the rain falls for 9.1 days. Throughout September, 1.1" (28mm) of precipitation is accumulated. Throughout the year, in Opheim, there are 90.8 rainfall days, and 11.1" (282mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall in Opheim, Montana.

Daylight

In September, the average length of the day in Opheim is 12.6h.

Sunshine

In September, the average sunshine in Opheim is 10.1h.

UV index

The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily maximum UV index of 4 interpret into the following advice:
Take precautions - Protection against the skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the average humidity in September in Opheim?

In Opheim, Montana, the average relative humidity in September is 47%.

How much does it rain in Opheim in September?

In September, in Opheim, the rain falls for 9.1 days. Throughout September, 1.1" (28mm) of precipitation is accumulated.

When it does not snow in Opheim?

June through September are months without snowfall in Opheim, Montana.

Does it snow in Opheim in September?

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

What is the average length of the day in September in Opheim?

The average length of the day in September in Opheim is 12.6h.

How long on average sun shines in September in Opheim?

The average sunshine in September in Opheim, Montana, is 10.1h.

What is the UV index intensity in September in Opheim?

In Opheim, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health risk from unprotected exposure to the UV radiation.

Average temperature in September
Opheim, MT

Average temperature in September - Opheim, MT
  • Average high temperature in September: 70.2°F

The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is February (23.7°F).

  • Average low temperature in September: 53.8°F

The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is February (10.2°F).

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Average pressure in September
Opheim, MT

Average pressure in September - Opheim, MT
  • Average pressure in September: 29.92"

The month with the highest atmospheric pressure is February (30.15").
The month with the lowest atmospheric pressure is June (29.83").

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Average wind speed in September
Opheim, MT

Average wind speed in September - Opheim, MT
  • Average wind speed in September: 10.4mph

The windiest month (with the highest average wind speed) is April (11.7mph).
The calmest month (with the lowest average wind speed) is February (8.8mph).

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Average humidity in September
Opheim, MT

Average humidity in September - Opheim, MT
  • Average humidity in September: 47%

The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is August (42%).

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Average rainfall in September
Opheim, MT

Average rainfall in September - Opheim, MT
  • Average rainfall in September: 1.1"

The wettest month (with the highest rainfall) is June (2.01").
The driest months (with the least rainfall) are January and February (0.35").

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Average rainfall days in September
Opheim, MT

Average rainfall days in September - Opheim, MT
  • Average rainfall days in September: 9.1 days

The month with the highest number of rainy days is May (13.8 days).
The month with the least rainy days is February (2.3 days).

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Average snowfall in September
Opheim, MT

Average snowfall in September - Opheim, MT
  • Average snowfall in September: 0"

The month with the highest snowfall is December (2.6").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Opheim, MT

Average snowfall days in September - Opheim, MT
  • Average snowfall days in September: 0.1 days

The month with the highest number of snowfall days is February (9.2 days).
Months with the least snowfall days are June, July and August (0 days).

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

Average daylight in September / Average sunshine in September - Opheim, MT
  • Average daylight in September: 12.6h

The month with the longest days is June (Average daylight: 16.1h).
The month with the shortest days is December (Average daylight: 8.3h).

  • Average sunshine in September: 10.1h

The month with the most sunshine is July (Average sunshine: 11.8h).
The month with the least sunshine is February (Average sunshine: 4.7h).

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Average sunshine days in September
Opheim, MT

Average sunshine days in September - Opheim, MT
  • Average sunshine days in September: 18.9 days

The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is June (13.8 days).

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Average UV index in September
Opheim, MT

Average UV index in September - Opheim, 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).

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Average cloud cover in September
Opheim, MT

Average cloud cover in September - Opheim, MT
  • Average cloud cover in September: 23

The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 16).

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Average visibility in September
Opheim, MT

Average visibility in September - Opheim, 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).

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