September weather forecast
Grand View, ID

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Weather in September

September, the first month of the autumn in Grand View, is still a warm month, with an average temperature varying between 57.9°F (14.4°C) and 79.2°F (26.2°C).

Temperature

The decrease of average high-temperatures is mild in September, with a decline from a tropical 90.1°F (32.3°C) in August to a warm 79.2°F (26.2°C). In September, in Grand View, the average low-temperature is a mild 57.9°F (14.4°C).

Humidity

The average relative humidity in September is 32%.

Rainfall

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

Snowfall

In Grand View, snow does not fall in May through September.

Daylight

In September, the average length of the day in Grand View is 12h and 29min.
On the first day of the month, sunrise is at 7:09 am and sunset at 8:18 pm. On the last day of September, sunrise is at 7:41 am and sunset at 7:26 pm MDT.

Sunshine

In Grand View, the average sunshine in September is 9.7h.

UV index

In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the ordinary person.
Note: The UV index of 5 during September leads to these advisories:
Take necessary precautions - Defending against sun damage is advocated. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
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Frequently asked questions

What is the temperature in September in Grand View?

September temperatures in Grand View vary between a high-temperature of 79.2°F (26.2°C) and a low-temperature of 57.9°F (14.4°C).

What is the average humidity in September in Grand View?

The average relative humidity in September is 32%.

How many days does it rain in September in Grand View?

In Grand View, Idaho, during September, the rain falls for 3.6 days and regularly aggregates up to 0.12" (3mm) of precipitation.

When it does not snow in Grand View?

In Grand View, snow does not fall in May through September.

Does it snow in Grand View in September?

In Grand View, Idaho, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September in Grand View?

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

What time are sunrise and sunset in September in Grand View?

On the first day of September in Grand View, Idaho, sunrise is at 7:09 am and sunset at 8:18 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 7:26 pm MDT.

How long on average sun shines in September in Grand View?

In Grand View, Idaho, the average sunshine duration in September is 9.7h.

What is the UV index reading in September in Grand View?

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

Average temperature in September - Grand View, 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
Grand View, ID

Average pressure in September - Grand View, 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
Grand View, ID

Average wind speed in September - Grand View, 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
Grand View, ID

Average humidity in September - Grand View, 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
Grand View, ID

Average rainfall in September - Grand View, 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
Grand View, ID

Average rainfall days in September - Grand View, 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
Grand View, ID

Average snowfall in September - Grand View, 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
Grand View, ID

Average snowfall days in September - Grand View, 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
Grand View, ID

Average daylight in September / Average sunshine in September - Grand View, 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
Grand View, ID

Average sunshine days in September - Grand View, 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
Grand View, ID

Average UV index in September - Grand View, 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
Grand View, ID

Average cloud cover in September - Grand View, 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
Grand View, ID

Average visibility in September - Grand View, 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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Grand View, Idaho, USA

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