September weather forecast and climate
Tranquillity, CA

Weather in September

The first month of the autumn, September, is still a hot month in Tranquillity, California, with average temperature varying between 63°F (17.2°C) and 91.6°F (33.1°C).

Temperature

In Tranquillity, California, the average high-temperature in September marginally drops, from a sweltering 98.2°F (36.8°C) in August, to a hot 91.6°F (33.1°C). The average low-temperature, in September, is 63°F (17.2°C).

Humidity

In September, the average relative humidity in Tranquillity is 35%.

Rainfall

Months with rainfall are January through July, September through December. September is the first month it rains in Tranquillity. Throughout September, in the average 1.5 rainfall days, it receives 0.08" (2mm) of precipitation. In Tranquillity, during the entire year, the rain falls for 59.3 days and collects up to 8.86" (225mm) of precipitation.

Daylight

The average length of the day in Tranquillity is 12.4h.

Sunshine

The average sunshine in September is 11.4h.

UV index

In Tranquillity, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from the exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 6 interpret into the following advice:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
[Resources]

FAQ

What is the temperature in September in Tranquillity?

In Tranquillity, in September, the average high-temperature is 91.6°F (33.1°C), and the average low-temperature is 63°F (17.2°C).

What is the average humidity in September in Tranquillity?

In September, the average relative humidity in Tranquillity, California, is 35%.

When does it start to rain in Tranquillity?

September is the first month it rains in Tranquillity. Throughout September, in the average 1.5 rainfall days, it receives 0.08" (2mm) of precipitation.

What is the average length of the day in September in Tranquillity?

In Tranquillity, California, the average length of the day in September is 12.4h.

How many hours of sunshine does Tranquillity have in September?

In Tranquillity, the average sunshine in September is 11.4h.

What is the UV index reading in September in Tranquillity?

The average daily maximum UV index in September in Tranquillity, California, is 6. A UV Index reading of 6 to 7 represents a high hazard to health from the exposure to the Sun's UV rays.

Average temperature in September
Tranquillity, CA

Average temperature in September - Tranquillity, CA
  • Average high temperature in September: 91.6°F

The warmest month (with the highest average high temperature) is July (99.9°F).
The month with the lowest average high temperature is December (55.9°F).

  • Average low temperature in September: 63°F

The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is December (42.3°F).

[Resources]

Average pressure in September
Tranquillity, CA

Average pressure in September - Tranquillity, CA
  • Average pressure in September: 29.92"

The month with the highest atmospheric pressure is January (30.14").
The month with the lowest atmospheric pressure is June (29.91").

[Resources]

Average wind speed in September
Tranquillity, CA

Average wind speed in September - Tranquillity, CA
  • Average wind speed in September: 6mph

The windiest month (with the highest average wind speed) is June (7.6mph).
The calmest month (with the lowest average wind speed) is January (4.8mph).

[Resources]

Average humidity in September
Tranquillity, CA

Average humidity in September - Tranquillity, CA
  • Average humidity in September: 35%

The month with the highest relative humidity is January (67%).
The month with the lowest relative humidity is July (31%).

[Resources]

Average rainfall in September
Tranquillity, CA

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

The wettest month (with the highest rainfall) is March (1.69").
The driest month (with the least rainfall) is August (0").

[Resources]

Average rainfall days in September
Tranquillity, CA

Average rainfall days in September - Tranquillity, CA
  • Average rainfall days in September: 1.5 days

The month with the highest number of rainy days is March (11.4 days).
The month with the least rainy days is August (0.6 days).

[Resources]

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

Average daylight in September / Average sunshine in September - Tranquillity, CA
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.6h).
The month with the shortest days is December (Average daylight: 9.7h).

  • Average sunshine in September: 11.4h

The month with the most sunshine is July (Average sunshine: 12.2h).
Months with the least sunshine are February and December (Average sunshine: 6.4).

[Resources]

Average sunshine days in September
Tranquillity, CA

Average sunshine days in September - Tranquillity, CA
  • Average sunshine days in September: 27.4 days

The month with the most sunshine days is August (29.8 days).
The month with the least sunshine days is March (18.7 days).

[Resources]

Average UV index in September
Tranquillity, CA

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

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

[Resources]

Average cloud cover in September
Tranquillity, CA

Average cloud cover in September - Tranquillity, CA
  • Average cloud cover in September: 5

Months with the most cloud cover are March and December (Cloud cover 29).
Months with the least cloud cover are July and August (Cloud cover 4).

[Resources]

Average visibility in September
Tranquillity, CA

Average visibility in September - Tranquillity, CA
  • Average visibility in September: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

[Resources]