September weather forecast
Winnemucca, NV

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Weather in September

September denotes the arrival of autumn in Winnemucca, and a noticeable downshift in temperature. The temperature drops to a high of 76.8°F (24.9°C) and a low of 57.2°F (14°C). The average monthly snowfall sees a slight uptick at 0.04" (1mm) averaged over 0.1 days. The daylight hours continue its downward trend, with the sun setting earlier each day. Winds remain almost steady, carrying a hint of upcoming winter.

Temperature

Transition from August to September is accompanied by a temperature drop, with average high-temperatures decreasing from a hot 86.7°F (30.4°C) to a warm 76.8°F (24.9°C). Throughout September, an average nighttime temperature of 57.2°F (14°C) is experienced.

Humidity

The average relative humidity in September is 27%.

Rainfall

In September, the rain falls for 4.9 days. Throughout September, 0.39" (10mm) of precipitation is accumulated. Throughout the year, there are 77.6 rainfall days, and 7.64" (194mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Winnemucca are January through May, September through December. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. Throughout the year, in Winnemucca, there are 33 snowfall days, and 17.72" (450mm) of snow is accumulated.

Daylight

In Winnemucca, the average length of the day in September is 12h and 27min.
On the first day of September, sunrise is at 6:18 am and sunset at 7:22 pm. On the last day of the month, sunrise is at 6:47 am and sunset at 6:33 pm PDT.

Sunshine

In Winnemucca, the average sunshine in September is 10.6h.

UV index

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 the average person.
Note: The maximum UV index of 5 during September leads to these instructions:
Exercise prevention - Protecting skin and eyes from harm is required. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Updated: Aug 18, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in September?

The high-temperature, in September, in Winnemucca, is 76.8°F (24.9°C), while the low-temperature averages to 57.2°F (14°C).

What is the average humidity in September in Winnemucca?

In Winnemucca, the average relative humidity in September is 27%.

How many days does it rain in September?

In September, the rain falls for 4.9 days. Throughout September, 0.39" (10mm) of precipitation is accumulated.

When does it start to snow in Winnemucca?

September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow.

What is the average length of the day in September?

In Winnemucca, the average day length in September is 12h and 27min.

When is the sunrise / sunset in September in Winnemucca?

On the first day of September, sunrise is at 6:18 am and sunset at 7:22 pm. On the last day of the month, sunrise is at 6:47 am and sunset at 6:33 pm PDT.

How long on average sun shines in September?

In September, the average sunshine duration is 10.6h.

What is the UV index intensity in September?

In September, the average daily maximum UV index in Winnemucca is 5. A UV Index value of 3 to 5 symbolizes a medium hazard to health from unsafe 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
Winnemucca, NV

Average temperature in September - Winnemucca, NV
  • Average high temperature in September: 76.8°F

The warmest month (with the highest average high temperature) is July (89.1°F).
The month with the lowest average high temperature is December (36.5°F).

  • Average low temperature in September: 57.2°F

The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is December (24.4°F).

Average pressure in September
Winnemucca, NV

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

The month with the highest atmospheric pressure is January (30.23"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

Average wind speed in September
Winnemucca, NV

Average wind speed in September - Winnemucca, NV
  • Average wind speed in September: 6.3mph

The windiest month (with the highest average wind speed) is April (7.9mph).
The calmest month (with the lowest average wind speed) is January (5.3mph).

Average humidity in September
Winnemucca, NV

Average humidity in September - Winnemucca, NV
  • Average humidity in September: 27%

The month with the highest relative humidity is January (74%).
The month with the lowest relative humidity is July (21%).

Average rainfall in September
Winnemucca, NV

Average rainfall in September - Winnemucca, NV
  • Average rainfall in September: 0.39"

The wettest months (with the highest rainfall) are March and December (1.1").
The driest month (with the least rainfall) is July (0.16").

Average rainfall days in September
Winnemucca, NV

Average rainfall days in September - Winnemucca, NV
  • Average rainfall days in September: 4.9 days

The month with the highest number of rainy days is March (11.1 days).
The months with the least rainy days are July and August (3.3 days).

Average snowfall in September
Winnemucca, NV

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

The month with the highest snowfall is December (5.16").
The months with the least snowfall are June, July and August (0").

Average snowfall days in September
Winnemucca, NV

Average snowfall days in September - Winnemucca, NV
  • Average snowfall days in September: 0.1 days

The month with the highest number of snowfall days is December (8.8 days).
The months with the least snowfall days are June, July and August (0 days).

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

Average daylight in September / Average sunshine in September - Winnemucca, NV
  • Average daylight in September: 12h and 3min

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

  • Average sunshine in September: 10h and 4min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 54min).

Average sunshine days in September
Winnemucca, NV

Average sunshine days in September - Winnemucca, NV
  • Average sunshine days in September: 23.2 days

The month with the most sunshine days is July (25.4 days).
The month with the least sunshine days is March (16.1 days).

Average UV index in September
Winnemucca, NV

Average UV index in September - Winnemucca, NV
  • 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).

Average cloud cover in September
Winnemucca, NV

Average cloud cover in September - Winnemucca, NV
  • Average cloud cover in September: 12

The months with the most cloud cover are January and December (Cloud cover 36).
The month with the least cloud cover is July (Cloud cover 8).

Average visibility in September
Winnemucca, NV

Average visibility in September - Winnemucca, NV
  • Average visibility in September: 6mi

The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).

Winnemucca, Nevada, USA

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