September weather forecastSausalito, CA
September
Weather in September
September, the first month of the autumn in Sausalito, is still a pleasant month, with an average temperature fluctuating between 72.3°F (22.4°C) and 56.5°F (13.6°C).Temperature
The warmest time of the year is September, with temperatures averaging a high of 72.3°F (22.4°C) and a low of 56.5°F (13.6°C).Humidity
In September, the average relative humidity in Sausalito is 71%.Rainfall
June through September are months with the least rain in Sausalito when the rain falls for 2.7 days and typically aggregates up to 0.08" (2mm) of rain.Ocean temperature
The month with the warmest seawater is September, with an average ocean temperature of 57.4°F (14.1°C).Note: Swimming in 57.4°F (14.1°C) poses a severe threat. Even short exposure to 55.4°F (13°C) is chilling, and going below 50°F (10°C) can cause breathing irregularities and intense cold shock, based on one's stamina.
Daylight
The average length of the day in September in Sausalito is 12h and 25min.On the first day of September, sunrise is at 6:40 am and sunset at 7:38 pm. On the last day of the month, sunrise is at 7:05 am and sunset at 6:53 pm PDT.
Sunshine
The average sunshine in September is 10.6h.UV index
April, June through September, with an average maximum UV index of 5, are months with the highest UV index in Sausalito. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index, 5 during September, leads to the following recommendations:
Be vigilant - A duty to shield skin and eyes from injury exists. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Sausalito, CA
- Average high temperature in September: 72.3°F
The warmest month (with the highest average high temperature) is September (72.3°F).
The month with the lowest average high temperature is December (55.2°F).
- Average low temperature in September: 56.5°F
The month with the highest average low temperature is September (56.5°F).
The coldest months (with the lowest average low temperature) are January and December (46.2°F).
Average pressure in September
Sausalito, CA
- Average pressure in September: 29.92"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed in September
Sausalito, CA
- Average wind speed in September: 5.9mph
The windiest month (with the highest average wind speed) is May (7.9mph).
The calmest months (with the lowest average wind speed) are October and November (5.7mph).
Average humidity in September
Sausalito, CA
- Average humidity in September: 71%
The months with the highest relative humidity are March and August (76%).
The month with the lowest relative humidity is October (68%).
Average rainfall in September
Sausalito, CA
- Average rainfall in September: 0.08"
The wettest month (with the highest rainfall) is February (0.98").
The driest months (with the least rainfall) are June, July, August and September (0.08").
Average rainfall days in September
Sausalito, CA
- Average rainfall days in September: 2.7 days
The month with the highest number of rainy days is March (10.5 days).
The month with the least rainy days is June (1.9 days).
Average sea temperature in September
Sausalito, CA
- Average sea temperature in September: 57.3°F
The best month for swimming (with the highest average sea temperature) is September (57.3°F).
The coldest months (with the lowest average sea temperature) are April and June (53°F).
Average daylight in September /
Average sunshine in September
Sausalito, CA
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 10h and 36min
The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in September
Sausalito, CA
- Average sunshine days in September: 24.5 days
The month with the most sunshine days is October (25 days).
The month with the least sunshine days is March (18.4 days).
Average UV index in September
Sausalito, CA
- Average UV index in September: 5
The months with the highest UV index are April, June, July, August and September (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
Sausalito, CA
- Average cloud cover in September: 18
The month with the most cloud cover is March (Cloud cover 38).
The month with the least cloud cover is September (Cloud cover 18).
Average visibility in September
Sausalito, 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).
