September weather forecast
Grand View, ID

Weather in September

September, the first month of the autumn, in Grand View, is also a moderately hot month, with average temperature ranging between max 79.2°F (26.2°C) and min 57.9°F (14.4°C).

Temperature

In September, the average high-temperature decreases, from a hot 90.1°F (32.3°C) in August, to a warm 79.2°F (26.2°C). In Grand View, Idaho,, the average low-temperature is 57.9°F (14.4°C).

Humidity

In Grand View, the average relative humidity is 32%.

Rainfall

In Grand View, Idaho, in September, during 3.6 rainfall days, 0.12" (3mm) of precipitation is typically accumulated. In Grand View, Idaho, 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 12.5h.

Sunshine

In September, the average sunshine is 9.7h.

UV index

In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from the exposure to the Sun's UV radiation for average individuals.
Note: In September, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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.
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FAQ

What is the average humidity in September in Grand View?

In Grand View, Idaho, the average relative humidity in September is 32%.

How much does it rain in Grand View in September?

In Grand View, Idaho, in September, it is raining for 3.6 days, with typically 0.12" (3mm) of accumulated 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?

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

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

In September, the average sunshine is 9.7h.

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

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

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"

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

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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").
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).
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: 12.5h

The month with the longest days is June (Average daylight: 15.3h).
The month with the shortest days is December (Average daylight: 9.1h).

  • Average sunshine in September: 9.7h

The month with the most sunshine is July (Average sunshine: 12.2h).
The month with the least sunshine is December (Average sunshine: 6.2h).

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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).
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

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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