September weather forecast
Blue Jay, CA

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Weather in September

September, the first month of the autumn in Blue Jay, is also a moderately hot month, with an average temperature varying between 61.9°F (16.6°C) and 84°F (28.9°C).

Temperature

The arrival of September brings an average high-temperature of a warm 84°F (28.9°C), subtly diverging from August's 88.3°F (31.3°C). Blue Jay's nights during September are marked by a pronounced drop from daytime temperatures, experiencing an average low of 61.9°F (16.6°C).

Humidity

The average relative humidity in September in Blue Jay, California, is 37%.

Rainfall

In Blue Jay, 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

June through October are months without snowfall.

Daylight

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

Sunshine

The average sunshine in September in Blue Jay is 10.6h.

UV index

In Blue Jay, 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 exposure to the Sun's UV radiation for ordinary individuals.
Note: A maximum UV index of 6 in September translates into the following recommendations:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
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Frequently asked questions

How hot is it in Blue Jay in September?

The high-temperature, in September, in Blue Jay, records 84°F (28.9°C), while the low-temperature is 61.9°F (16.6°C).

What is the average humidity in September in Blue Jay?

The average relative humidity in September is 37%.

How much does it rain in Blue Jay in September?

In Blue Jay, California, during September, the rain falls for 2.3 days and regularly aggregates up to 0.12" (3mm) of precipitation.

When it does not snow in Blue Jay?

June through October are months without snowfall.

How many hours of daylight does Blue Jay have in September?

In Blue Jay, California, the average day length in September is 12h and 22min.

When is the sunrise / sunset in September in Blue Jay?

On the first day of September in Blue Jay, California, 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 Blue Jay?

The average sunshine duration in September in Blue Jay is 10.6h.

What is the UV index intensity in September in Blue Jay?

The average daily maximum UV index in September in Blue Jay, California, is 6. A UV Index reading of 6 to 7 represents a high health threat from unsafe 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
Blue Jay, CA

Average temperature in September - Blue Jay, 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).

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Average pressure in September
Blue Jay, CA

Average pressure in September - Blue Jay, 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).

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Average wind speed in September
Blue Jay, CA

Average wind speed in September - Blue Jay, 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).

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Average humidity in September
Blue Jay, CA

Average humidity in September - Blue Jay, 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%).

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Average rainfall in September
Blue Jay, CA

Average rainfall in September - Blue Jay, 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").

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Average rainfall days in September
Blue Jay, CA

Average rainfall days in September - Blue Jay, 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).

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Average snowfall in September
Blue Jay, CA

Average snowfall in September - Blue Jay, 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").

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Average snowfall days in September
Blue Jay, CA

Average snowfall days in September - Blue Jay, 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).

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Average daylight in September /
Average sunshine in September
Blue Jay, CA

Average daylight in September / Average sunshine in September - Blue Jay, 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).

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Average sunshine days in September
Blue Jay, CA

Average sunshine days in September - Blue Jay, 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).

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Average UV index in September
Blue Jay, CA

Average UV index in September - Blue Jay, 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).

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Average cloud cover in September
Blue Jay, CA

Average cloud cover in September - Blue Jay, 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).

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Average visibility in September
Blue Jay, CA

Average visibility in September - Blue Jay, 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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Blue Jay, California, USA

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