September weather forecast
Arrowhead Springs, CA

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Weather in September

The first month of the autumn, September, is also a moderately hot month in Arrowhead Springs, California, with an average temperature ranging between min 62.4°F (16.9°C) and max 85.8°F (29.9°C).

Temperature

As August transitions into September, Arrowhead Springs records an average high-temperature of a warm 85.8°F (29.9°C), showing a gentle shift from the preceding month. Contrasted against daytime highs, Arrowhead Springs records an average nighttime low of 62.4°F (16.9°C) in September.

Humidity

In Arrowhead Springs, the average relative humidity in September is 39%.

Rainfall

In September, in Arrowhead Springs, the rain falls for 2.6 days. Throughout September, 0.12" (3mm) of precipitation is accumulated. Throughout the year, in Arrowhead Springs, California, there are 51.8 rainfall days, and 6.69" (170mm) of precipitation is accumulated.

Snowfall

In Arrowhead Springs, snow does not fall in January, March through December.

Daylight

In September, the average length of the day is 12h and 22min.
On the first day of the month, sunrise is at 6:23 am and sunset at 7:14 pm. On the last day of September, sunrise is at 6:43 am and sunset at 6:34 pm PDT.

Sunshine

The average sunshine in September in Arrowhead Springs is 10.7h.

UV index

In September, the average daily maximum UV index in Arrowhead Springs is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: The daily high UV index of 6 in September translates into this advice:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
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Frequently asked questions

Is it hot in Arrowhead Springs during September?

In September, in Arrowhead Springs, the average high-temperature is 85.8°F (29.9°C), and the average low-temperature is 62.4°F (16.9°C). In June, the average heat index (a.k.a. 'real feel', 'feels like'), which represents the influence of relative humidity on air temperature, is computed to be 84.2°F (29°C).

What is the average humidity in September in Arrowhead Springs?

The average relative humidity in September in Arrowhead Springs is 39%.

How much does it rain in Arrowhead Springs in September?

In Arrowhead Springs, California, during September, the rain falls for 2.6 days and regularly aggregates up to 0.12" (3mm) of precipitation.

When it does not snow in Arrowhead Springs?

January, March through December are months without snowfall.

What is the average length of the day in September in Arrowhead Springs?

The average day length in September is 12h and 22min.

What time are sunrise and sunset in September in Arrowhead Springs?

On the first day of September in Arrowhead Springs, sunrise is at 6:23 am and sunset at 7:14 pm. On the last day of the month, sunrise is at 6:43 am and sunset at 6:34 pm PDT.

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

The average sunshine duration in September in Arrowhead Springs is 10.7h.

How high is the UV index in September in Arrowhead Springs?

In Arrowhead Springs, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high hazard to health from unprotected exposure to UV radiation.
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
Arrowhead Springs, CA

Average temperature in September - Arrowhead Springs, CA
  • Average high temperature in September: 85.8°F

The warmest month (with the highest average high temperature) is August (90.9°F).
The month with the lowest average high temperature is December (57.7°F).

  • Average low temperature in September: 62.4°F

The month with the highest average low temperature is August (66.6°F).
The coldest months (with the lowest average low temperature) are February and December (41.5°F).

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Average pressure in September
Arrowhead Springs, CA

Average pressure in September - Arrowhead Springs, 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 (29.84"Hg).

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Average wind speed in September
Arrowhead Springs, CA

Average wind speed in September - Arrowhead Springs, CA
  • Average wind speed in September: 4.8mph

The windiest month (with the highest average wind speed) is April (6.6mph).
The calmest month (with the lowest average wind speed) is September (4.8mph).

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Average humidity in September
Arrowhead Springs, CA

Average humidity in September - Arrowhead Springs, CA
  • Average humidity in September: 39%

The month with the highest relative humidity is February (52%).
The month with the lowest relative humidity is August (36%).

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Average rainfall in September
Arrowhead Springs, CA

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

The wettest month (with the highest rainfall) is December (1.42").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days in September
Arrowhead Springs, CA

Average rainfall days in September - Arrowhead Springs, CA
  • Average rainfall days in September: 2.6 days

The month with the highest number of rainy days is March (7.3 days).
The month with the least rainy days is June (1.3 days).

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Average snowfall days in September
Arrowhead Springs, CA

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

The month with the highest number of snowfall days is February (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).

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

Average daylight in September / Average sunshine in September - Arrowhead Springs, 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 month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 54min).

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Average sunshine days in September
Arrowhead Springs, CA

Average sunshine days in September - Arrowhead Springs, CA
  • Average sunshine days in September: 25.7 days

The month with the most sunshine days is June (28.5 days).
The month with the least sunshine days is February (20.9 days).

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Average UV index in September
Arrowhead Springs, CA

Average UV index in September - Arrowhead Springs, 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 November and December (UV index 3).

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Average cloud cover in September
Arrowhead Springs, CA

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

The months with the most cloud cover are March and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 5).

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Average visibility in September
Arrowhead Springs, CA

Average visibility in September - Arrowhead Springs, 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).

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Arrowhead Springs, California, USA

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