September weather forecast
Knowles Junction, CA

Share

Weather in September

September, the first month of the autumn in Knowles Junction, is still a warm month, with an average temperature varying between 81°F (27.2°C) and 54.7°F (12.6°C).

Temperature

Knowles Junction's progression into September involves a gentle drop in the average high-temperature, from a tropical 86.5°F (30.3°C) in August to a warm 81°F (27.2°C). Despite considerable daily temperature swings, a steady low-temperature average of 54.7°F (12.6°C) is noted throughout September.

Humidity

The average relative humidity in September in Knowles Junction is 35%.

Rainfall

In Knowles Junction, in September, it is raining for 3 days, with typically 0.28" (7mm) of accumulated precipitation. In Knowles Junction, during the entire year, the rain falls for 73.5 days and collects up to 19.69" (500mm) of precipitation.

Snowfall

In Knowles Junction, California, snow does not fall in May through October.

Daylight

In Knowles Junction, the average length of the day in September is 12h and 24min.
On the first day of September in Knowles Junction, sunrise is at 6:30 am and sunset at 7:27 pm. On the last day of the month, sunrise is at 6:54 am and sunset at 6:43 pm PDT.

Sunshine

In September, the average sunshine in Knowles Junction is 11.2h.

UV index

In Knowles Junction, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the ordinary person.
Note: The UV index of 5 during September translates into the following guidance:
Exercise prevention - Protecting skin and eyes from harm is required. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
[Resources]

Frequently asked questions

What is the average September temperature in Knowles Junction?

In September, the average high-temperature and low-temperature in Knowles Junction, California, are 81°F (27.2°C) and 54.7°F (12.6°C) respectively.

What is the average humidity in September in Knowles Junction?

In September, the average relative humidity in Knowles Junction, California, is 35%.

How many days does it rain in September in Knowles Junction?

In Knowles Junction, in September, during 3 rainfall days, 0.28" (7mm) of precipitation is typically accumulated.

When it does not snow in Knowles Junction?

In Knowles Junction, snow does not fall in May through October.

How many hours of daylight does Knowles Junction have in September?

The average day length in September is 12h and 24min.

When is the sunrise / sunset in September in Knowles Junction?

On the first day of September in Knowles Junction, California, sunrise is at 6:30 am and sunset at 7:27 pm. On the last day of the month, sunrise is at 6:54 am and sunset at 6:43 pm PDT.

How long on average sun shines in September in Knowles Junction?

In Knowles Junction, the average sunshine duration in September is 11.2h.

What is the UV index intensity in September in Knowles Junction?

In Knowles Junction, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium health risk from exposure to Sun's UV rays.
Average max. wind speed
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
Knowles Junction, CA

Average temperature in September - Knowles Junction, CA
  • Average high temperature in September: 81°F

The warmest month (with the highest average high temperature) is July (88.2°F).
The month with the lowest average high temperature is December (48.9°F).

  • Average low temperature in September: 54.7°F

The month with the highest average low temperature is July (58.8°F).
The coldest months (with the lowest average low temperature) are February and December (32.9°F).

[Resources]

Average pressure in September
Knowles Junction, CA

Average pressure in September - Knowles Junction, CA
  • Average pressure in September: 29.93"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

[Resources]

Average wind speed in September
Knowles Junction, CA

Average wind speed in September - Knowles Junction, CA
  • Average wind speed in September: 4.7mph

The windiest month (with the highest average wind speed) is March (5.2mph).
The calmest months (with the lowest average wind speed) are November and December (4.3mph).

[Resources]

Average humidity in September
Knowles Junction, CA

Average humidity in September - Knowles Junction, CA
  • Average humidity in September: 35%

The month with the highest relative humidity is March (69%).
The months with the lowest relative humidity are July and August (32%).

[Resources]

Average rainfall in September
Knowles Junction, CA

Average rainfall in September - Knowles Junction, CA
  • Average rainfall in September: 0.28"

The wettest month (with the highest rainfall) is February (3.54").
The driest month (with the least rainfall) is August (0.12").

[Resources]

Average rainfall days in September
Knowles Junction, CA

Average rainfall days in September - Knowles Junction, CA
  • Average rainfall days in September: 3 days

The month with the highest number of rainy days is March (11.3 days).
The month with the least rainy days is August (2.1 days).

[Resources]

Average snowfall in September
Knowles Junction, CA

Average snowfall in September - Knowles Junction, CA
  • Average snowfall in September: 0"

The month with the highest snowfall is February (5.55").
The months with the least snowfall are May, June, July, August, September and October (0").

[Resources]

Average snowfall days in September
Knowles Junction, CA

Average snowfall days in September - Knowles Junction, CA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (3.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

[Resources]

Average daylight in September /
Average sunshine in September
Knowles Junction, CA

Average daylight in September / Average sunshine in September - Knowles Junction, CA
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).

  • Average sunshine in September: 11h and 1min

The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The month with the least sunshine is February (Average sunshine: 6h and 12min).

[Resources]

Average sunshine days in September
Knowles Junction, CA

Average sunshine days in September - Knowles Junction, CA
  • Average sunshine days in September: 25.2 days

The months with the most sunshine days are August and October (26.5 days).
The month with the least sunshine days is March (18.3 days).

[Resources]

Average UV index in September
Knowles Junction, CA

Average UV index in September - Knowles Junction, CA
  • 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 February, November and December (UV index 2).

[Resources]

Average cloud cover in September
Knowles Junction, CA

Average cloud cover in September - Knowles Junction, CA
  • Average cloud cover in September: 7

The month with the most cloud cover is March (Cloud cover 31).
The months with the least cloud cover are July and August (Cloud cover 5).

[Resources]

Average visibility in September
Knowles Junction, CA

Average visibility in September - Knowles Junction, CA
  • 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).

[Resources]

Knowles Junction, California, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location