September weather forecast and climate
Bootjack, CA

The first month of the autumn, September, is still a warm month in Bootjack, California, with temperature in the range of an average low of 54.7°F (12.6°C) and an average high of 81°F (27.2°C).

Temperature

In Bootjack, the average high-temperature slightly decreases, from a hot 86.5°F (30.3°C) in August, to a warm 81°F (27.2°C). In Bootjack, in September, the average low-temperature is 54.7°F (12.6°C).

Humidity

The average relative humidity in September is 35%.

Rainfall

In Bootjack, California, it is raining for 3 days, with typically 0.28" (7mm) of accumulated precipitation. In Bootjack, during the entire year, the rain falls for 73.5 days and collects up to 19.69" (500mm) of precipitation.

Snowfall

May through October are months without snowfall in Bootjack.

Daylight

In Bootjack, the average length of the day is 12.4h.

Sunshine

In September, the average sunshine is 11.2h.

UV index

The average daily maximum UV index in Bootjack is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: In September, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against the skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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.

What is the temperature in September in Bootjack?

The average high-temperature, in September, in Bootjack, California, is 81°F (27.2°C), while the average low-temperature is 54.7°F (12.6°C).

What is the average humidity in September in Bootjack?

The average relative humidity in September in Bootjack is 35%.

How many days does it rain in September in Bootjack?

In Bootjack, in September, it is raining for 3 days, with typically 0.28" (7mm) of accumulated precipitation.

When it does not snow in Bootjack?

In Bootjack snow does not fall in May through October.

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

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

How many hours of sunshine does Bootjack have in September?

The average sunshine in September in Bootjack, California, is 11.2h.

How high is the UV index in September in Bootjack?

The average daily maximum UV index in September in Bootjack is 5. A UV Index estimate of 3 to 5 represents a medium hazard to health from the exposure to the Sun's UV radiation.
Average temperature in September - Bootjack, CA
  • Average high temperature in September: 27.2°C

The warmest month (with the highest average high temperature) is July (31.2°C).
The month with the lowest average high temperature is December (9.4°C).

  • Average low temperature in September: 12.6°C

The month with the highest average low temperature is July (14.9°C).
The coldest months (with the lowest average low temperature) are February and December (0.5°C).

Average pressure in September - Bootjack, CA
  • Average pressure in September: 1013.6mbar

The month with the highest atmospheric pressure is January (1021.2mbar).
The month with the lowest atmospheric pressure is June (1012.4mbar).

Average wind speed in September - Bootjack, CA
  • Average wind speed in September: 7.6km/h

The windiest month (with the highest average wind speed) is March (8.3km/h).
The calmest month (with the lowest average wind speed) is December (6.9km/h).

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

The month with the highest relative humidity is March (69%).
Months with the lowest relative humidity are July and August (32%).

Average rainfall in September - Bootjack, CA
  • Average rainfall in September: 7mm

The wettest month (with the highest rainfall) is February (90mm).
The driest month (with the least rainfall) is August (3mm).

Average rainfall days in September - Bootjack, CA
  • Average rainfall days in September: 3 days

The month with the highest number of rainy days is March (11.3 days).
The month with the least rainy days is August (2.1 days).

Average snowfall in September - Bootjack, CA
  • Average snowfall in September: 0mm

The month with the highest snowfall is February (141mm).
Months with the least snowfall are May, June, July, August, September and October (0mm).

Average snowfall days in September - Bootjack, CA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (3.4 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

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

The month with the longest days is June (Average daylight: 14.7h).
The month with the shortest days is December (Average daylight: 9.6h).

  • Average sunshine in September: 11.2h

Months with the most sunshine are June and July (Average sunshine: 12.1h).
The month with the least sunshine is February (Average sunshine: 6.2h).

Average sunshine days in September - Bootjack, CA
  • Average sunshine days in September: 25.2 days

Months with the most sunshine days are August and October (26.5 days).
The month with the least sunshine days is March (18.3 days).

Average UV index in September - Bootjack, CA
  • Average UV index in September: 5

The month with the highest UV index is July (UV index 7).
Months with the lowest UV index are February, November and December (UV index 2).

Average cloud cover in September - Bootjack, CA
  • Average cloud cover in September: 7

The month with the most cloud cover is March (Cloud cover 31).
Months with the least cloud cover are July and August (Cloud cover 5).

Average visibility in September - Bootjack, CA
  • Average visibility in September: 10km

Months with the highest visibility are April, May, June, July, August, September, October, November and December (10km).
Months with the lowest visibility are January, February and March (9km).