September weather forecast
Lake Arrowhead, CA

Share

Weather in September

The first month of the autumn, September, is also a moderately hot month in Lake Arrowhead, California, with temperature in the range of an average high of 84°F (28.9°C) and an average low of 61.9°F (16.6°C).

Temperature

September reports an average high-temperature of a moderately hot 84°F (28.9°C), slightly varied from August's 88.3°F (31.3°C). September in Lake Arrowhead witnesses a substantial contrast between the daytime highs and the average low of 61.9°F (16.6°C).

Humidity

The average relative humidity in September in Lake Arrowhead is 37%.

Rainfall

In Lake Arrowhead, in September, during 2.3 rainfall days, 0.12" (3mm) of precipitation is typically accumulated. Throughout the year, there are 42.2 rainfall days, and 5.55" (141mm) of precipitation is accumulated.

Snowfall

In Lake Arrowhead, California, snow does not fall in June through October.

Daylight

The average length of the day in September is 12h and 22min.
On the first day of September in Lake Arrowhead, sunrise is at 6:22 am and sunset at 7:14 pm. On the last day of the month, sunrise is at 6:43 am and sunset at 6:33 pm PDT.

Sunshine

In September, the average sunshine in Lake Arrowhead is 10.6h.

UV index

In September, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: The daily maximum UV index of 6 in September interprets into the following advice:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. To cut down UV radiation exposure by about half, sport a wide-brim hat.
[Resources]

Frequently asked questions

How hot is September in Lake Arrowhead?

In Lake Arrowhead, 84°F (28.9°C) is the average high-temperature and 61.9°F (16.6°C) is the average low-temperature during September.

What is the average humidity in September in Lake Arrowhead?

In Lake Arrowhead, California, the average relative humidity in September is 37%.

How many days does it rain in September in Lake Arrowhead?

In Lake Arrowhead, California, in September, it is raining for 2.3 days, with typically 0.12" (3mm) of accumulated precipitation.

When it does not snow in Lake Arrowhead?

June through October are months without snowfall.

How many hours of daylight does Lake Arrowhead have in September?

In September, the average day length in Lake Arrowhead is 12h and 22min.

When are sunrise and sunset in September in Lake Arrowhead?

On the first day of September, sunrise is at 6:22 am and sunset at 7:14 pm. On the last day of the month, sunrise is at 6:43 am and sunset at 6:33 pm PDT.

How long on average sun shines in September in Lake Arrowhead?

In September, the average sunshine duration in Lake Arrowhead, California, is 10.6h.

What is the UV index intensity in September in Lake Arrowhead?

In September, the average daily maximum UV index in Lake Arrowhead is 6. A UV Index estimate of 6 to 7 represents a high health risk 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
Lake Arrowhead, CA

Average temperature in September - Lake Arrowhead, CA
  • Average high temperature in September: 84°F

The warmest months (with the highest average high temperature) are July and August (88.3°F).
The month with the lowest average high temperature is December (53.4°F).

  • Average low temperature in September: 61.9°F

The month with the highest average low temperature is August (66.4°F).
The coldest month (with the lowest average low temperature) is December (38.3°F).

[Resources]

Average pressure in September
Lake Arrowhead, CA

Average pressure in September - Lake Arrowhead, CA
  • Average pressure in September: 29.86"Hg

The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).

[Resources]

Average wind speed in September
Lake Arrowhead, CA

Average wind speed in September - Lake Arrowhead, CA
  • Average wind speed in September: 5.3mph

The windiest month (with the highest average wind speed) is April (7.5mph).
The calmest month (with the lowest average wind speed) is September (5.3mph).

[Resources]

Average humidity in September
Lake Arrowhead, CA

Average humidity in September - Lake Arrowhead, CA
  • Average humidity in September: 37%

The months with the highest relative humidity are February and December (52%).
The month with the lowest relative humidity is August (32%).

[Resources]

Average rainfall in September
Lake Arrowhead, CA

Average rainfall in September - Lake Arrowhead, CA
  • Average rainfall in September: 0.12"

The wettest month (with the highest rainfall) is February (1.1").
The driest month (with the least rainfall) is June (0.08").

[Resources]

Average rainfall days in September
Lake Arrowhead, CA

Average rainfall days in September - Lake Arrowhead, CA
  • Average rainfall days in September: 2.3 days

The month with the highest number of rainy days is March (5.7 days).
The month with the least rainy days is June (1.2 days).

[Resources]

Average snowfall in September
Lake Arrowhead, CA

Average snowfall in September - Lake Arrowhead, CA
  • Average snowfall in September: 0"

The month with the highest snowfall is April (4.09").
The months with the least snowfall are June, July, August, September and October (0").

[Resources]

Average snowfall days in September
Lake Arrowhead, CA

Average snowfall days in September - Lake Arrowhead, CA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (4 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

[Resources]

Average daylight in September /
Average sunshine in September
Lake Arrowhead, CA

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

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).

  • Average sunshine in September: 10h and 4min

The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 54min).

[Resources]

Average sunshine days in September
Lake Arrowhead, CA

Average sunshine days in September - Lake Arrowhead, CA
  • Average sunshine days in September: 26 days

The month with the most sunshine days is June (27.9 days).
The month with the least sunshine days is February (21.8 days).

[Resources]

Average UV index in September
Lake Arrowhead, CA

Average UV index in September - Lake Arrowhead, CA
  • Average UV index in September: 6

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 3).

[Resources]

Average cloud cover in September
Lake Arrowhead, CA

Average cloud cover in September - Lake Arrowhead, CA
  • Average cloud cover in September: 6

The month with the most cloud cover is December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).

[Resources]

Average visibility in September
Lake Arrowhead, CA

Average visibility in September - Lake Arrowhead, 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]

Lake Arrowhead, California, USA

Weather forecast for your location

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