Stinson Beach
California, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Stinson Beach, CA

September, the first month of the autumn, in Stinson Beach, is also an agreeable month, with average temperature varying between 70.9°F (21.6°C) and 56.3°F (13.5°C).

Temperature

The warmest month is September, with an average high-temperature of 70.9°F (21.6°C) and an average low-temperature of 56.3°F (13.5°C).

Humidity

The average relative humidity in September is 73%.

Rainfall

In Stinson Beach, during September, the rain falls for 3.4 days and regularly aggregates up to 0.12" (3mm) of precipitation. In Stinson Beach, during the entire year, the rain falls for 80.3 days and collects up to 15.98" (406mm) of precipitation.

Snowfall

January through November are months without snowfall.

Daylight

In Stinson Beach, the average length of the day is 12.4h.

Sunshine

In September, the average sunshine is 10.5h.

UV index

June through September, with an average maximum UV index of 5, are months with the highest UV index. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to the UV radiation for ordinary individuals.
Note: The daily maximum UV index of 5 interpret into the following advice:
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.

What is the warmest month in Stinson Beach?

With an average high-temperature of 70.9°F (21.6°C) and an average low-temperature of 56.3°F (13.5°C), September is the warmest month in Stinson Beach, California.

What is the temperature in September in Stinson Beach?

The average high-temperature, in September, is 70.9°F (21.6°C), while the average low-temperature is 56.3°F (13.5°C).

What is the average humidity in September in Stinson Beach?

In Stinson Beach, the average relative humidity in September is 73%.

How much does it rain in Stinson Beach in September?

In Stinson Beach, in September, during 3.4 rainfall days, 0.12" (3mm) of precipitation is typically accumulated.

When it does not snow in Stinson Beach?

January through November are months without snowfall.

How many hours of daylight does Stinson Beach have in September?

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

How long on average sun shines in September in Stinson Beach?

In September, the average sunshine in Stinson Beach, California, is 10.5h.

What are the months with the highest UV index in Stinson Beach?

June through September, with an average maximum UV index of 5, are months with the highest UV index in Stinson Beach.

What is the UV index intensity in September in Stinson Beach?

In Stinson Beach, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium health risk from unsafe exposure to the Sun's UV rays.
Average temperature in September - Stinson Beach, CA
  • Average high temperature in September: 70.9°F

The warmest month (with the highest average high temperature) is September (70.9°F).
The month with the lowest average high temperature is December (55.2°F).

  • Average low temperature in September: 56.3°F

The month with the highest average low temperature is September (56.3°F).
The coldest month (with the lowest average low temperature) is December (46°F).

Average humidity in September - Stinson Beach, CA
  • Average humidity in September: 73%

The month with the highest relative humidity is August (78%).
The month with the lowest relative humidity is October (69%).

Average rainfall in September - Stinson Beach, CA
  • Average rainfall in September: 0.12"

The wettest month (with the highest rainfall) is February (3.43").
The driest months (with the least rainfall) are July and August (0.08").

Average rainfall days in September - Stinson Beach, CA
  • Average rainfall days in September: 3.4 days

The month with the highest number of rainy days is March (12.8 days).
The month with the least rainy days is July (2.3 days).

Average snowfall days in September - Stinson Beach, CA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is December (0.1 days).
Months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).

Average daylight in September / Average sunshine in September - Stinson Beach, 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: 10.5h

The month with the most sunshine is July (Average sunshine: 11.2h).
The month with the least sunshine is December (Average sunshine: 5.6h).

Average UV index in September - Stinson Beach, CA
  • Average UV index in September: 5

Months with the highest UV index are June, July, August and September (UV index 5).
Months with the lowest UV index are February, November and December (UV index 3).