Weather in Mendocino County, United States in September

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Visiting Mendocino County, United States in September

September has average maximum temperatures of 23°C (74°F) which is nice and warm and makes sunbathing pleasant on clear days. The sunshine percentage is 66% making it sunny but overcast at times. The hours of sunshine per day are 8.2hrs making the days long and bright. September has total rainfall of 4.5cm (1.8inches) making it extremely dry with only very rare light showers. There are just 1.9 days with some rainfall so you can still enjoy the beach on the majority of rain free clear days and rainy days are few and far between. It is a good time for sunbathing in Mendocino County. Sea temperatures are a cold 15°C (60°F). September is too cold for swimming in Mendocino County for any length of time, unless you have a wetsuit.

Consider visiting Mendocino County in the months of May, June, July, August, for the best beach weather.

Also consider one of our other suggestions for September.

Can you sunbathe in Mendocino County in September?

Yes, September is a good time for sunbathing in Mendocino County.

September has average maximum temperatures of 23°C (74°F) which is nice and warm and makes sunbathing pleasant on clear days. The sunshine percentage is 66% making it sunny but overcast at times. The hours of sunshine per day are 8.2hrs making the days long and bright. September has total rainfall of 4.5cm (1.8inches) making it extremely dry with only very rare light showers. There are just 1.9 days with some rainfall so you can still enjoy the beach on the majority of rain free clear days and rainy days are few and far between.

More about September temperature and sunshine.

Can you swim in Mendocino County in September?

No, September is too cold for swimming in Mendocino County for any length of time, with the sea water at 15°C (60°F), unless you have a wetsuit.

More about September sea temperatures.

Is September a good time to holiday in Mendocino County?

Yes, September is a good time for a holiday in Mendocino County.

September has average maximum temperatures of 23°C (74°F) which is nice and warm and makes sunbathing pleasant on clear days. The sunshine percentage is 66% making it sunny but overcast at times. The hours of sunshine per day are 8.2hrs making the days long and bright. September has total rainfall of 4.5cm (1.8inches) making it extremely dry with only very rare light showers. There are just 1.9 days with some rainfall so you can still enjoy the beach on the majority of rain free clear days and rainy days are few and far between. It is a good time for sunbathing in Mendocino County. Sea temperatures are a cold 15°C (60°F). September is too cold for swimming in Mendocino County for any length of time, unless you have a wetsuit.

More about the September temperatures and sunshine.

Is Mendocino County warm in September?

Yes, Mendocino County is nice and warm and makes sunbathing pleasant on clear days in September.

The average maximum temperature in Mendocino County in September is 23°C (74°F). The average maximum temperature is 26°C (78°) in the previous month and 22°C (71°F) in the next month.

The average temperature in Mendocino County in September is 19°C (66°F). The average temperature is 21°C (70°F) in the previous month and 16°C (61°F) in the next month.

More info about the September temperatures and sunshine.

How sunny is Mendocino County in September?

The average day light hours per day in Mendocino County in September are 12.5. The sunshine percentage is 66% making it sunny but overcast at times. The hours of sunshine per day are 8.2hrs making the days long and bright.

More about September sunshine.

Temperature in Mendocino County in September

The average maximum temperature in Mendocino County in September is 23°C (74°F). The average maximum temperature is 26°C (78°F) in the previous month and 22°C (71°F) in the next month.

The average temperature in Mendocino County in September is 19°C (66°F). The average temperature is 21°C (70°F) in the previous month and 16°C (61°F) in the next month.

The average minimum temperature in Mendocino County in September is 10°C (50°F). The minimum temperature is 12°C (54°F) in the previous month and 7°C (45°F) in the next month.

Sunshine in Mendocino County in September

During September the average day light hours are 12.5 per day in Mendocino County. The sunshine percentage is 66% making it sunny but overcast at times. The hours of sunshine per day are 8.2hrs making the days long and bright.

The ultraviolet index in Mendocino County in September is typically 7.5 during September. An ultraviolet index reading of 8 to 10 indicates a very high risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 15 minutes. Take extra precautions because unprotected skin and eyes will be damaged and can burn quickly. Tanning will be safest before 10am and after 4pm but only with a good application of sun screen. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.

Sea Temperature in Mendocino County in September

The average sea water temperature in Mendocino County in September is 15.3°C (59.5°F) which is cold for swimming, a full wet suit is required to spend any length of time in the sea.

Rainfall in Mendocino County in September

The average total rainfall in Mendocino County in September is 4.5cm (1.8inches) and on average there are 1.9 rainy days in September making it an extremely dry time to visit the beach.

Humidity in Mendocino County in September

The maximum dew point (an indicator of humidity) in Mendocino County in September is 10°C (51°F) which is very comfortable. The dew point is 12°C (54°F) in the previous month and 9°C (9°F) in the next month.

The average maximum relative humidity in Mendocino County in September is typically 84.2%. The maximum relative humidity is 82.7% in the previous month and 90.6% in the next month.

The average relative humidity in Mendocino County in September is typically 53.5%. The average relative humidity is 52.5% in the previous month and 62.7% in the next month.

Wind Speed in Mendocino County in September

The average maximum wind speed in Mendocino County in September is typically 20KM/H (12MPH). The average maximum wind speed is 20KM/H (13MPH) in the previous month and 16KM/H (10MPH) in the next month.

The average wind speed in Mendocino County in September is typically 5KM/H (3MPH). The average wind speed is 6KM/H (4MPH) in the previous month and 4KM/H (2MPH) in the next month.

The average wind direction in Mendocino County in September is from the North.

Monthly Averages

Suggested Beaches in September

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