September weather forecast
Shackelford, CA

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Weather in September

The first month of the autumn, September, is still a tropical month in Shackelford, California, with temperature in the range of an average high of 90.9°F (32.7°C) and an average low of 59.9°F (15.5°C).

Temperature

The shift from August to September includes a small decrease in the average high-temperature, from a very hot 96.4°F (35.8°C) to a hot 90.9°F (32.7°C). Shackelford's average low-temperature of 59.9°F (15.5°C) in September reflects a significant disparity from the daytime highs.

Heat index

In September, the average heat index is estimated at a hot 93.2°F (34°C). Adopt additional preventive measures, heat cramps and heat exhaustion are potential outcomes. Prolonged activity may trigger heatstroke.
Heat index details are generally centered around shaded locations and a mild breeze. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', melds the effects of warmth and moisture to generate a feeling of heat. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.

Humidity

In Shackelford, the average relative humidity in September is 41%.

Rainfall

In Shackelford, during September, the rain falls for 1.6 days and regularly aggregates up to 0.08" (2mm) of precipitation. Throughout the year, there are 54.3 rainfall days, and 6.54" (166mm) of precipitation is accumulated.

Daylight

In Shackelford, the average length of the day in September is 12h and 25min.
On the first day of September, sunrise is at 6:34 am and sunset at 7:32 pm. On the last day of the month, sunrise is at 6:59 am and sunset at 6:47 pm PDT.

Sunshine

In Shackelford, California, the average sunshine in September is 11.5h.

UV index

The average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In September, the maximum UV index of 6 translates into these guidelines:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
Updated: Aug 17, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is it in September?

The high-temperature during September is 90.9°F (32.7°C) and the low-temperature is 59.9°F (15.5°C). In September, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, is estimated at 93.2°F (34°C).

What is the average humidity in September?

The average relative humidity in September is 41%.

How many days does it rain in September?

In September, the rain falls for 1.6 days. Throughout September, 0.08" (2mm) of precipitation is accumulated.

What is the average length of the day in September?

In September, the average day length in Shackelford is 12h and 25min.

What time are sunrise and sunset in September?

On the first day of September, sunrise is at 6:34 am and sunset at 7:32 pm. On the last day of the month, sunrise is at 6:59 am and sunset at 6:47 pm PDT.

How many hours of sunshine does Shackelford have in September?

In September, the average sunshine duration is 11.5h.

What is the UV index reading in September?

In Shackelford, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health risk 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
Shackelford, CA

Average temperature in September - Shackelford, CA
  • Average high temperature in September: 90.9°F

The warmest month (with the highest average high temperature) is July (97.7°F).
The month with the lowest average high temperature is December (55.6°F).

  • Average low temperature in September: 59.9°F

The month with the highest average low temperature is July (62.1°F).
The coldest months (with the lowest average low temperature) are January and December (41.9°F).

Average pressure in September
Shackelford, CA

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

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in September
Shackelford, CA

Average wind speed in September - Shackelford, CA
  • Average wind speed in September: 5.8mph

The windiest month (with the highest average wind speed) is June (7.3mph).
The calmest month (with the lowest average wind speed) is November (5.2mph).

Average humidity in September
Shackelford, CA

Average humidity in September - Shackelford, CA
  • Average humidity in September: 41%

The month with the highest relative humidity is January (72%).
The month with the lowest relative humidity is July (37%).

Average rainfall in September
Shackelford, CA

Average rainfall in September - Shackelford, CA
  • Average rainfall in September: 0.08"

The wettest month (with the highest rainfall) is March (1.3").
The driest months (with the least rainfall) are July and August (0.04").

Average rainfall days in September
Shackelford, CA

Average rainfall days in September - Shackelford, CA
  • Average rainfall days in September: 1.6 days

The month with the highest number of rainy days is March (10.3 days).
The month with the least rainy days is August (0.9 days).

Average daylight in September /
Average sunshine in September
Shackelford, CA

Average daylight in September / Average sunshine in September - Shackelford, 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 36min).

  • Average sunshine in September: 11h and 3min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).

Average sunshine days in September
Shackelford, CA

Average sunshine days in September - Shackelford, CA
  • Average sunshine days in September: 27.1 days

The month with the most sunshine days is August (29.2 days).
The month with the least sunshine days is March (19.6 days).

Average UV index in September
Shackelford, CA

Average UV index in September - Shackelford, CA
  • Average UV index in September: 6

The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).

Average cloud cover in September
Shackelford, CA

Average cloud cover in September - Shackelford, CA
  • Average cloud cover in September: 6

The month with the most cloud cover is March (Cloud cover 33).
The month with the least cloud cover is July (Cloud cover 4).

Average visibility in September
Shackelford, CA

Average visibility in September - Shackelford, 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).

Shackelford, California, USA

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