September weather forecast
Greenleaf, ID

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Weather in September

September, the first month of the autumn in Greenleaf, is also a moderately hot month, with temperature in the range of an average low of 55.4°F (13°C) and an average high of 78.1°F (25.6°C).

Temperature

In September, the average high-temperature goes from a hot 89.1°F (31.7°C) in August to a moderately hot 78.1°F (25.6°C). Greenleaf, during the nights of September, registers a substantial plunge from the daytime high, averaging at a mild 55.4°F (13°C).

Humidity

The average relative humidity in September is 35%.

Rainfall

In Greenleaf, in September, it is raining for 5.5 days, with typically 0.31" (8mm) of accumulated precipitation. Throughout the year, in Greenleaf, there are 105.6 rainfall days, and 9.65" (245mm) of precipitation is accumulated.

Snowfall

In Greenleaf, snow does not fall in May through October.

Daylight

The average length of the day in September is 12h and 29min.
On the first day of the month, sunrise is at 7:11 am and sunset at 8:22 pm. On the last day of September, sunrise is at 7:44 am and sunset at 7:29 pm MDT.

Sunshine

In September, the average sunshine in Greenleaf is 9.6h.

UV index

In Greenleaf, Idaho, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for average individuals.
Note: The daily maximum UV index of 5 in September interprets into the following advice:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
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Frequently asked questions

What is the average September temperature in Greenleaf?

An average high-temperature, in September, in Greenleaf, is 78.1°F (25.6°C) and the average low-temperature is 55.4°F (13°C).

What is the average humidity in September in Greenleaf?

In Greenleaf, the average relative humidity in September is 35%.

How many days does it rain in September in Greenleaf?

In Greenleaf, during September, the rain falls for 5.5 days and regularly aggregates up to 0.31" (8mm) of precipitation.

When it does not snow in Greenleaf?

In Greenleaf, Idaho, snow does not fall in May through October.

How many hours of daylight does Greenleaf have in September?

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

When is the sunrise / sunset in September in Greenleaf?

On the first day of September in Greenleaf, sunrise is at 7:11 am and sunset at 8:22 pm. On the last day of the month, sunrise is at 7:44 am and sunset at 7:29 pm MDT.

How many hours of sunshine does Greenleaf have in September?

In Greenleaf, the average sunshine duration in September is 9.6h.

What is the UV index reading in September in Greenleaf?

In Greenleaf, Idaho, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate health threat from exposure to Sun's UV rays.
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
Greenleaf, ID

Average temperature in September - Greenleaf, ID
  • Average high temperature in September: 78.1°F

The warmest month (with the highest average high temperature) is July (90.7°F).
The month with the lowest average high temperature is December (35.8°F).

  • Average low temperature in September: 55.4°F

The months with the highest average low temperature are July and August (62.8°F).
The coldest month (with the lowest average low temperature) is December (24.4°F).

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Average pressure in September
Greenleaf, ID

Average pressure in September - Greenleaf, ID
  • Average pressure in September: 29.95"Hg

The month with the highest atmospheric pressure is January (30.24"Hg).
The months with the lowest atmospheric pressure are June and August (29.91"Hg).

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Average wind speed in September
Greenleaf, ID

Average wind speed in September - Greenleaf, ID
  • Average wind speed in September: 5.5mph

The windiest month (with the highest average wind speed) is April (7.4mph).
The calmest month (with the lowest average wind speed) is January (4.9mph).

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Average humidity in September
Greenleaf, ID

Average humidity in September - Greenleaf, ID
  • Average humidity in September: 35%

The month with the highest relative humidity is January (79%).
The months with the lowest relative humidity are July and August (29%).

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Average rainfall in September
Greenleaf, ID

Average rainfall in September - Greenleaf, ID
  • Average rainfall in September: 0.31"

The wettest month (with the highest rainfall) is December (1.38").
The driest month (with the least rainfall) is July (0.16").

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Average rainfall days in September
Greenleaf, ID

Average rainfall days in September - Greenleaf, ID
  • Average rainfall days in September: 5.5 days

The month with the highest number of rainy days is March (15.3 days).
The month with the least rainy days is July (3.3 days).

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Average snowfall in September
Greenleaf, ID

Average snowfall in September - Greenleaf, ID
  • Average snowfall in September: 0"

The month with the highest snowfall is December (3.39").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in September
Greenleaf, ID

Average snowfall days in September - Greenleaf, ID
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is December (7.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in September /
Average sunshine in September
Greenleaf, ID

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

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).

  • Average sunshine in September: 9h and 4min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).

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Average sunshine days in September
Greenleaf, ID

Average sunshine days in September - Greenleaf, ID
  • Average sunshine days in September: 23.6 days

The month with the most sunshine days is July (25.1 days).
The month with the least sunshine days is March (13.6 days).

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Average UV index in September
Greenleaf, ID

Average UV index in September - Greenleaf, 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
Greenleaf, ID

Average cloud cover in September - Greenleaf, ID
  • Average cloud cover in September: 14

The month with the most cloud cover is December (Cloud cover 41).
The month with the least cloud cover is July (Cloud cover 8).

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Average visibility in September
Greenleaf, ID

Average visibility in September - Greenleaf, 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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Greenleaf, Idaho, USA

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