September weather forecast
Highwood, MT

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Weather in September

The first month of the autumn, September, is still a pleasant month in Highwood, Montana, with an average temperature ranging between min 52.2°F (11.2°C) and max 70.7°F (21.5°C).

Temperature

As August shifts into September, a slight alteration in temperatures is observed, with average highs reducing from a warm 81.9°F (27.7°C) to a pleasant 70.7°F (21.5°C). During September, Highwood sees a mean low-temperature of 52.2°F (11.2°C).

Humidity

The average relative humidity in September is 46%.

Rainfall

In September, the rain falls for 9.4 days. Throughout September, 1.14" (29mm) of precipitation is accumulated. Throughout the year, in Highwood, there are 119.1 rainfall days, and 13.43" (341mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, September through December. September is the first month it typically snows in Highwood, Montana. Throughout September, in the average 0.4 snowfall days, it receives 0.94" (24mm) of snow. In Highwood, during the entire year, snow falls for 58.3 days and aggregates up to 29.37" (746mm) of snow.

Daylight

The average length of the day in September in Highwood is 12h and 33min.
On the first day of the month, sunrise is at 6:42 am and sunset at 8:02 pm. On the last day of September, sunrise is at 7:21 am and sunset at 7:03 pm MDT.

Sunshine

In September, the average sunshine in Highwood is 9.9h.

UV index

The average daily maximum UV index in September in Highwood is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: The UV index of 4 in September translates into these instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
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Frequently asked questions

What are September temperatures in Highwood?

An average high-temperature, in September, in Highwood, is 70.7°F (21.5°C) and the average low-temperature is 52.2°F (11.2°C). The average heat index (a.k.a. 'felt air temperature', 'feels like'), which represents the influence of relative humidity on air temperature, in July is calculated to be 82.4°F (28°C).

What is the average humidity in September in Highwood?

In Highwood, the average relative humidity in September is 46%.

How much does it rain in Highwood in September?

In Highwood, in September, during 9.4 rainfall days, 1.14" (29mm) of precipitation is typically accumulated.

When does it start snowing in Highwood?

September is the first month it typically snows. Throughout September, in the average 0.4 snowfall days, it receives 0.94" (24mm) of snow.

How many hours of daylight does Highwood have in September?

In September, the average day length in Highwood is 12h and 33min.

When is the sunrise / sunset in September in Highwood?

In September, on the first day of the month, sunrise is at 6:42 am and sunset at 8:02 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 7:03 pm MDT.

How long on average sun shines in September in Highwood?

The average sunshine duration in September in Highwood, Montana, is 9.9h.

What is the UV index intensity in September in Highwood?

In September, the average daily maximum UV index in Highwood is 4. A UV Index estimate of 3 to 5 represents a moderate health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Highwood, MT

Average temperature in September - Highwood, MT
  • Average high temperature in September: 70.7°F

The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is December (29.8°F).

  • Average low temperature in September: 52.2°F

The month with the highest average low temperature is August (60.4°F).
The coldest month (with the lowest average low temperature) is February (18.1°F).

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Average pressure in September
Highwood, MT

Average pressure in September - Highwood, MT
  • Average pressure in September: 29.94"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).

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Average wind speed in September
Highwood, MT

Average wind speed in September - Highwood, MT
  • Average wind speed in September: 8.9mph

The windiest months (with the highest average wind speed) are January and November (10.7mph).
The calmest month (with the lowest average wind speed) is August (8.1mph).

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Average humidity in September
Highwood, MT

Average humidity in September - Highwood, MT
  • Average humidity in September: 46%

The month with the highest relative humidity is January (78%).
The month with the lowest relative humidity is August (39%).

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Average rainfall in September
Highwood, MT

Average rainfall in September - Highwood, MT
  • Average rainfall in September: 1.14"

The wettest month (with the highest rainfall) is June (2.05").
The driest month (with the least rainfall) is December (0.67").

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Average rainfall days in September
Highwood, MT

Average rainfall days in September - Highwood, MT
  • Average rainfall days in September: 9.4 days

The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is January (5.3 days).

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Average snowfall in September
Highwood, MT

Average snowfall in September - Highwood, MT
  • Average snowfall in September: 0.94"

The month with the highest snowfall is February (5.51").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in September
Highwood, MT

Average snowfall days in September - Highwood, MT
  • Average snowfall days in September: 0.4 days

The month with the highest number of snowfall days is February (12.2 days).
The 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
Highwood, MT

Average daylight in September / Average sunshine in September - Highwood, MT
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).

  • Average sunshine in September: 9h and 5min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The months with the least sunshine are January, February and December (Average sunshine: 5h and 30min).

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Average sunshine days in September
Highwood, MT

Average sunshine days in September - Highwood, MT
  • Average sunshine days in September: 19.3 days

The month with the most sunshine days is September (19.3 days).
The month with the least sunshine days is April (11.2 days).

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Average UV index in September
Highwood, MT

Average UV index in September - Highwood, MT
  • Average UV index in September: 4

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average cloud cover in September
Highwood, MT

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

The month with the most cloud cover is February (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 14).

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Average visibility in September
Highwood, MT

Average visibility in September - Highwood, 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).

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Highwood, Montana, USA

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