September weather forecast
Phelps Corner, CA

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Weather in September

The first month of the autumn, September, is also a moderately hot month in Phelps Corner, California, with an average temperature varying between 82.6°F (28.1°C) and 64°F (17.8°C).

Temperature

In September, Phelps Corner's weather conditions record an average high-temperature of a still moderately hot 82.6°F (28.1°C), demonstrating little divergence from the preceding month. Phelps Corner, in September, observes a steady average low-temperature of 64°F (17.8°C).

Heat index

For most parts of September, the heat index is evaluated at 84.2°F (29°C). Prolonged exposure and physical activity might induce exhaustion, potentially causing heat cramps.
Be informed that the heat index values are oriented around shady conditions and gentle breezes. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', takes into account both air temperature and humidity to illustrate what people actually feel. A person's impression of weather can be shaped by many aspects, among them metabolic variations, pregnancy, and levels of physical activity. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values hold particular significance for children. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.

Humidity

The average relative humidity in September in Phelps Corner is 57%.

Rainfall

In September, in Phelps Corner, the rain falls for 4.6 days. Throughout September, 0.39" (10mm) of precipitation is accumulated. In Phelps Corner, during the entire year, the rain falls for 60.6 days and collects up to 8.66" (220mm) of precipitation.

Daylight

In Phelps Corner, the average length of the day in September is 12h and 22min.
On the first day of September, sunrise is at 6:22 am and sunset at 7:11 pm. On the last day of the month, sunrise is at 6:41 am and sunset at 6:32 pm PDT.

Sunshine

In September, the average sunshine is 10.4h.

UV index

The months with the highest UV index are June through September, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for the average person.
Note: A maximum high daily UV index of 6 during September translates into the following directions:
Shield from overexposure. Defense against sun-related harm is required. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. Always opt for UVA and UVB-resistant sunglasses on radiant days.
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Frequently asked questions

How hot is September in Phelps Corner?

September temperatures in Phelps Corner vary between a high-temperature of 82.6°F (28.1°C) and a low-temperature of 64°F (17.8°C). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, in September is evaluated at 84.2°F (29°C).

What is the average humidity in September in Phelps Corner?

In Phelps Corner, the average relative humidity in September is 57%.

How much does it rain in Phelps Corner in September?

In Phelps Corner, during September, the rain falls for 4.6 days and regularly aggregates up to 0.39" (10mm) of precipitation.

What is the average length of the day in September in Phelps Corner?

The average day length in September in Phelps Corner, California, is 12h and 22min.

When are sunrise and sunset in September in Phelps Corner?

On the first day of September in Phelps Corner, sunrise is at 6:22 am and sunset at 7:11 pm. On the last day of the month, sunrise is at 6:41 am and sunset at 6:32 pm PDT.

How many hours of sunshine does Phelps Corner have in September?

In Phelps Corner, California, the average sunshine duration in September is 10.4h.

What are the months with the highest UV index in Phelps Corner?

June through September, with an average maximum UV index of 6, are months with the highest UV index in Phelps Corner.

How high is the UV index in September in Phelps Corner?

In Phelps Corner, California, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Phelps Corner, CA

Average temperature in September - Phelps Corner, CA
  • Average high temperature in September: 82.6°F

The warmest month (with the highest average high temperature) is August (84.2°F).
The month with the lowest average high temperature is December (63°F).

  • Average low temperature in September: 64°F

The month with the highest average low temperature is August (66.2°F).
The coldest months (with the lowest average low temperature) are February and December (47.3°F).

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Average pressure in September
Phelps Corner, CA

Average pressure in September - Phelps Corner, CA
  • Average pressure in September: 29.87"Hg

The month with the highest atmospheric pressure is January (30.08"Hg).
The months with the lowest atmospheric pressure are June and September (29.87"Hg).

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Average wind speed in September
Phelps Corner, CA

Average wind speed in September - Phelps Corner, CA
  • Average wind speed in September: 4.3mph

The windiest months (with the highest average wind speed) are April and May (5.5mph).
The calmest months (with the lowest average wind speed) are September and October (4.3mph).

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Average humidity in September
Phelps Corner, CA

Average humidity in September - Phelps Corner, CA
  • Average humidity in September: 57%

The month with the highest relative humidity is May (65%).
The month with the lowest relative humidity is November (52%).

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Average rainfall in September
Phelps Corner, CA

Average rainfall in September - Phelps Corner, CA
  • Average rainfall in September: 0.39"

The wettest month (with the highest rainfall) is February (1.81").
The driest month (with the least rainfall) is June (0.08").

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Average rainfall days in September
Phelps Corner, CA

Average rainfall days in September - Phelps Corner, CA
  • Average rainfall days in September: 4.6 days

The month with the highest number of rainy days is March (7.7 days).
The month with the least rainy days is June (1.3 days).

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Average daylight in September /
Average sunshine in September
Phelps Corner, CA

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

The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).

  • Average sunshine in September: 10h and 2min

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 42min).

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Average sunshine days in September
Phelps Corner, CA

Average sunshine days in September - Phelps Corner, CA
  • Average sunshine days in September: 22.5 days

The month with the most sunshine days is June (27.8 days).
The month with the least sunshine days is July (20.3 days).

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Average UV index in September
Phelps Corner, CA

Average UV index in September - Phelps Corner, CA
  • Average UV index in September: 6

The months with the highest UV index are June, July, August and September (UV index 6).
The month with the lowest UV index is December (UV index 3).

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Average cloud cover in September
Phelps Corner, CA

Average cloud cover in September - Phelps Corner, CA
  • Average cloud cover in September: 9

The months with the most cloud cover are March and December (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 6).

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Average visibility in September
Phelps Corner, CA

Average visibility in September - Phelps Corner, 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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Phelps Corner, California, USA

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