September weather forecast and climate
Birds Landing, CA

Weather in September

September, the first month of the autumn, in Birds Landing, is still a warm month, with temperature in the range of an average low of 57.7°F (14.3°C) and an average high of 84.9°F (29.4°C).

Temperature

In Birds Landing, California, the average high-temperature in September is almost the same as in August - a moderately hot 84.9°F (29.4°C). The average low-temperature, in Birds Landing, is 57.7°F (14.3°C).

Heat index

In September, the average heat index is estimated at a hot 87.1°F (30.6°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'apparent temperature', 'felt air temperature', or 'real feel', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. Additional factors like activity, pregnancy, differences in body mass, height, and shape, and clothing affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

The least humid month in Birds Landing is September, with an average relative humidity of 53%.

Rainfall

January through May, September through December are months with rainfall. September is the first month it rains. Throughout September, in the average 1 rainfall days, it receives 0.04" (1mm) of precipitation. Throughout the year, there are 37.4 rainfall days, and 2.44" (62mm) of precipitation is accumulated.

Daylight

In Birds Landing, the average length of the day in September is 12.4h.

Sunshine

The average sunshine in September is 11.2h.

UV index

In Birds Landing, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 5 in September transform into the following instructions:
Take precautions - Protection against the skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in September in Birds Landing?

In September, in Birds Landing, California, the average high-temperature is 84.9°F (29.4°C), and the average low-temperature is 57.7°F (14.3°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), that calculates temperature value influenced by the moisture in the air, in September is calculated to 87.1°F (30.6°C).

What is the least humid month in Birds Landing?

September is the least humid month in Birds Landing, California, with an average relative humidity of 53%.

What is the average humidity in September in Birds Landing?

In Birds Landing, California, the average relative humidity in September is 53%.

When does it start to rain in Birds Landing?

September is the first month it rains. Throughout September, in the average 1 rainfall days, it receives 0.04" (1mm) of precipitation.

What is the average length of the day in September in Birds Landing?

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

How long on average sun shines in September in Birds Landing?

In September, the average sunshine in Birds Landing, California, is 11.2h.

What is the UV index reading in September in Birds Landing?

In Birds Landing, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate vulnerability from the exposure to the Sun's UV rays.

Average temperature in September
Birds Landing, CA

Average temperature in September - Birds Landing, CA
  • Average high temperature in September: 84.9°F

The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is December (55.2°F).

  • Average low temperature in September: 57.7°F

The month with the highest average low temperature is September (57.7°F).
The coldest month (with the lowest average low temperature) is January (41.5°F).

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Average pressure in September
Birds Landing, CA

Average pressure in September - Birds Landing, 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").

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Average wind speed in September
Birds Landing, CA

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

The windiest month (with the highest average wind speed) is June (7.6mph).
The calmest months (with the lowest average wind speed) are January and November (4.5mph).

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Average humidity in September
Birds Landing, CA

Average humidity in September - Birds Landing, CA
  • Average humidity in September: 53%

Months with the highest relative humidity are January and March (73%).
The month with the lowest relative humidity is September (53%).

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Average rainfall in September
Birds Landing, CA

Average rainfall in September - Birds Landing, CA
  • Average rainfall in September: 0.04"

The wettest month (with the highest rainfall) is February (0.59").
The driest months (with the least rainfall) are June, July and August (0").

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Average rainfall days in September
Birds Landing, CA

Average rainfall days in September - Birds Landing, CA
  • Average rainfall days in September: 1 days

The month with the highest number of rainy days is March (8.1 days).
The month with the least rainy days is August (0.5 days).

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Average daylight in September /
Average sunshine in September
Birds Landing, CA

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

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.6h).

  • Average sunshine in September: 11.2h

The month with the most sunshine is July (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 5.8h).

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Average sunshine days in September
Birds Landing, CA

Average sunshine days in September - Birds Landing, CA
  • Average sunshine days in September: 28.8 days

Months with the most sunshine days are July and August (30.3 days).
The month with the least sunshine days is March (21.8 days).

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Average UV index in September
Birds Landing, CA

Average UV index in September - Birds Landing, CA
  • Average UV index in September: 5

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in September
Birds Landing, CA

Average cloud cover in September - Birds Landing, CA
  • Average cloud cover in September: 9

The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is July (Cloud cover 5).

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Average visibility in September
Birds Landing, CA

Average visibility in September - Birds Landing, 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).

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