September weather forecast
Glenbrook, NV

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Weather in September

September brings a gentle transition from the high summer temperatures towards the mellow warmth of early fall. There's a slight increase in rainfall at 0.31" (8mm), indicating the shift towards the wet season. A gradual decrease in sunshine hours gives a hint to the forthcoming fall. The wind speed sees a mild elevation, bringing occurrences of a cool breeze. The weather characterises itself with a mix of warm days, crisp mornings, and the first hints of autumn foliage.

Temperature

In Glenbrook, the average high-temperature in September slightly decreases from an agreeable 72.9°F (22.7°C) in August to an enjoyable 67.5°F (19.7°C). Glenbrook anticipates a considerable drop in temperature at night in September, with an average low of 43°F (6.1°C).

Humidity

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

Rainfall

In Glenbrook, during September, the rain falls for 3.3 days and regularly aggregates up to 0.31" (8mm) of precipitation. Throughout the year, in Glenbrook, there are 47.3 rainfall days, and 9.61" (244mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Glenbrook are January through June, September through December. September is the first month it typically snows. Throughout September, in the average 0.4 snowfall days, it receives 0.04" (1mm) of snow. Throughout the year, there are 51.5 snowfall days, and 38.54" (979mm) of snow is accumulated.

Daylight

In September, the average length of the day is 12h and 26min.
On the first day of the month, sunrise is at 6:29 am and sunset at 7:29 pm. On the last day of September, sunrise is at 6:55 am and sunset at 6:43 pm PDT.

Sunshine

The average sunshine in September in Glenbrook, Nevada, is 11.1h.

UV index

In Glenbrook, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: An average maximum UV index of 3 in September leads to these recommendations:
Take measures. Individuals with light skin might experience burns in under 30 minutes. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Glenbrook in September?

An average high-temperature, in September, in Glenbrook, is 67.5°F (19.7°C) and the average low-temperature is 43°F (6.1°C).

What is the average humidity in September in Glenbrook?

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

How many days does it rain in September in Glenbrook?

In Glenbrook, in September, it is raining for 3.3 days, with typically 0.31" (8mm) of accumulated precipitation.

When does it start to snow in Glenbrook?

September is the first month it typically snows in Glenbrook, Nevada. Throughout September, in the average 0.4 snowfall days, it receives 0.04" (1mm) of snow.

What is the average length of the day in September in Glenbrook?

In September, the average day length in Glenbrook is 12h and 26min.

What time are sunrise and sunset in September in Glenbrook?

On the first day of September in Glenbrook, Nevada, sunrise is at 6:29 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:43 pm PDT.

How long on average sun shines in September in Glenbrook?

In Glenbrook, the average sunshine duration in September is 11.1h.

What is the UV index intensity in September in Glenbrook?

In September, the average daily maximum UV index in Glenbrook, Nevada, is 3. A UV Index reading of 3 to 5 represents a moderate vulnerability 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
Glenbrook, NV

Average temperature in September - Glenbrook, NV
  • Average high temperature in September: 67.5°F

The warmest month (with the highest average high temperature) is July (73.9°F).
The month with the lowest average high temperature is December (36.5°F).

  • Average low temperature in September: 43°F

The month with the highest average low temperature is July (47.1°F).
The coldest month (with the lowest average low temperature) is December (22.1°F).

Average pressure in September
Glenbrook, NV

Average pressure in September - Glenbrook, NV
  • Average pressure in September: 29.94"Hg

The month with the highest atmospheric pressure is January (30.18"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in September
Glenbrook, NV

Average wind speed in September - Glenbrook, NV
  • Average wind speed in September: 5.8mph

The windiest month (with the highest average wind speed) is March (7.7mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

Average humidity in September
Glenbrook, NV

Average humidity in September - Glenbrook, NV
  • Average humidity in September: 46%

The month with the highest relative humidity is March (80%).
The months with the lowest relative humidity are July and August (43%).

Average rainfall in September
Glenbrook, NV

Average rainfall in September - Glenbrook, NV
  • Average rainfall in September: 0.31"

The wettest months (with the highest rainfall) are February and March (1.5").
The driest months (with the least rainfall) are June and August (0.28").

Average rainfall days in September
Glenbrook, NV

Average rainfall days in September - Glenbrook, NV
  • Average rainfall days in September: 3.3 days

The month with the highest number of rainy days is May (7.4 days).
The month with the least rainy days is November (2.4 days).

Average snowfall in September
Glenbrook, NV

Average snowfall in September - Glenbrook, NV
  • Average snowfall in September: 0.04"

The month with the highest snowfall is March (8.7").
The months with the least snowfall are July and August (0").

Average snowfall days in September
Glenbrook, NV

Average snowfall days in September - Glenbrook, NV
  • Average snowfall days in September: 0.4 days

The month with the highest number of snowfall days is March (9.8 days).
The months with the least snowfall days are July and August (0 days).

Average daylight in September /
Average sunshine in September
Glenbrook, NV

Average daylight in September / Average sunshine in September - Glenbrook, NV
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in September: 11h and 1min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).

Average sunshine days in September
Glenbrook, NV

Average sunshine days in September - Glenbrook, NV
  • Average sunshine days in September: 25.8 days

The month with the most sunshine days is October (26.8 days).
The month with the least sunshine days is February (19 days).

Average UV index in September
Glenbrook, NV

Average UV index in September - Glenbrook, NV
  • Average UV index in September: 3

The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, April, November and December (UV index 2).

Average cloud cover in September
Glenbrook, NV

Average cloud cover in September - Glenbrook, NV
  • Average cloud cover in September: 10

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

Average visibility in September
Glenbrook, NV

Average visibility in September - Glenbrook, NV
  • 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).

Glenbrook, Nevada, USA

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