September weather forecast
Mountain Home, ID

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Weather in September

As September rolls in Mountain Home, Idaho, USA, it marks the transition from summer to autumn. Temperatures gradually start to fall, with an average high of 79.2°F (26.2°C) and a low of 57.9°F (14.4°C). However, despite the decline in temperatures, September remains dry, with only 0.12" (3mm) of rainfall. The first traces of autumn become visible towards the end of September as leaves begin to change color, painting the city in hues of gold and red.

Temperature

A shift in the average high-temperature occurs in September in Mountain Home, reducing from a tropical 90.1°F (32.3°C) in August to a warm 79.2°F (26.2°C). In September, Mountain Home experiences an average nighttime temperature of 57.9°F (14.4°C).

Humidity

In Mountain Home, the average relative humidity in September is 32%.

Rainfall

In Mountain Home, during September, the rain falls for 3.6 days and regularly aggregates up to 0.12" (3mm) of precipitation. In Mountain Home, during the entire year, the rain falls for 82.3 days and collects up to 7.44" (189mm) of precipitation.

Snowfall

May through September are months without snowfall in Mountain Home.

Daylight

In September, the average length of the day is 12h and 29min.
On the first day of September, sunrise is at 7:08 am and sunset at 8:17 pm. On the last day of the month, sunrise is at 7:39 am and sunset at 7:25 pm MDT.

Sunshine

The average sunshine in September in Mountain Home is 9.7h.

UV index

The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for average individuals.
Note: In September, the maximum UV index of 5 transforms into these recommendations:
Adopt protective measures - Suggestions to resist sunburn are offered. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
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Frequently asked questions

What are the temperatures in Mountain Home in September?

In September, the average high-temperature and low-temperature in Mountain Home are 79.2°F (26.2°C) and 57.9°F (14.4°C) respectively.

What is the average humidity in September in Mountain Home?

In Mountain Home, the average relative humidity in September is 32%.

How many days does it rain in September in Mountain Home?

In Mountain Home, Idaho, in September, it is raining for 3.6 days, with typically 0.12" (3mm) of accumulated precipitation.

When it does not snow in Mountain Home?

In Mountain Home, Idaho, snow does not fall in May through September.

Does it snow in Mountain Home in September?

In Mountain Home, Idaho, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September in Mountain Home?

In September, the average day length is 12h and 29min.

What time are sunrise and sunset in September in Mountain Home?

In September, on the first day of the month, sunrise is at 7:08 am and sunset at 8:17 pm. On the last day of the month, in Mountain Home, sunrise is at 7:39 am and sunset at 7:25 pm MDT.

How many hours of sunshine does Mountain Home have in September?

In September, the average sunshine duration is 9.7h.

What is the UV index intensity in September in Mountain Home?

In Mountain Home, Idaho, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Mountain Home, ID

Average temperature in September - Mountain Home, ID
  • Average high temperature in September: 79.2°F

The warmest month (with the highest average high temperature) is July (91.8°F).
The month with the lowest average high temperature is December (36.9°F).

  • Average low temperature in September: 57.9°F

The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is December (25.9°F).

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Average pressure in September
Mountain Home, ID

Average pressure in September - Mountain Home, ID
  • Average pressure in September: 29.93"Hg

The month with the highest atmospheric pressure is January (30.26"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

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Average wind speed in September
Mountain Home, ID

Average wind speed in September - Mountain Home, ID
  • Average wind speed in September: 6.6mph

The windiest month (with the highest average wind speed) is April (8.8mph).
The calmest month (with the lowest average wind speed) is September (6.6mph).

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Average humidity in September
Mountain Home, ID

Average humidity in September - Mountain Home, ID
  • Average humidity in September: 32%

The month with the highest relative humidity is January (76%).
The month with the lowest relative humidity is July (25%).

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Average rainfall in September
Mountain Home, ID

Average rainfall in September - Mountain Home, ID
  • Average rainfall in September: 0.12"

The wettest month (with the highest rainfall) is December (1.3").
The driest month (with the least rainfall) is August (0.08").

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Average rainfall days in September
Mountain Home, ID

Average rainfall days in September - Mountain Home, ID
  • Average rainfall days in September: 3.6 days

The month with the highest number of rainy days is March (13.7 days).
The month with the least rainy days is July (2 days).

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Average snowfall in September
Mountain Home, ID

Average snowfall in September - Mountain Home, ID
  • Average snowfall in September: 0"

The month with the highest snowfall is December (4.06").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in September
Mountain Home, ID

Average snowfall days in September - Mountain Home, ID
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is December (7.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Mountain Home, ID

Average daylight in September / Average sunshine in September - Mountain Home, ID
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in September: 9h and 4min

The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 12min).

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Average sunshine days in September
Mountain Home, ID

Average sunshine days in September - Mountain Home, ID
  • Average sunshine days in September: 25.7 days

The month with the most sunshine days is July (28.3 days).
The month with the least sunshine days is March (14.9 days).

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Average UV index in September
Mountain Home, ID

Average UV index in September - Mountain Home, ID
  • Average UV index in September: 5

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

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Average cloud cover in September
Mountain Home, ID

Average cloud cover in September - Mountain Home, ID
  • Average cloud cover in September: 12

The month with the most cloud cover is December (Cloud cover 34).
The month with the least cloud cover is July (Cloud cover 7).

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Average visibility in September
Mountain Home, ID

Average visibility in September - Mountain Home, ID
  • 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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Mountain Home, Idaho, USA

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