San Rafael Weather in September

September in San Rafael averages 26°C (79°F) during the day and 12°C (54°F) at night. With only 4 mm (0.2 in) of rainfall expected on average, it's a largely dry month.

Rainfall in San Rafael in September

Historically, approximately a single day this month are expected to have rain, averaging 4 mm (0.2 in). On the rare occasion it rains this month, it usually amounts to very little.

Temperature in San Rafael in September

September is one of the better months to visit San Rafael. Expect 26°C (79°F) during the day and 12°C (54°F) at night. During September, you'll experience the summer season. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. Nights cool down to 12°C (54°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions. On average, this month sees the highest temperatures of the year. Worth packing a few lighter outfits.

Sunshine in San Rafael in September

Expect sunny days throughout the month, with an estimated 270 hours of sunshine. This makes it a pleasant time to visit San Rafael.

So this is a great month to visit if you prefer dry days with pleasant temperatures.

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• January
• February
• March
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• May
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• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our San Rafael's climate page.

San Rafael Temperature in September

Min Temperature 12°C (54°F)  

Max Temperature 26°C (79°F)  

Chance of Rain 3%  

Precipitation 4 mm (0.2 in)  

Rainy days a single day  

Humidity 73% *  

Sunshine 270 hours *  

Percentage Sunshine 73% *  

* Data from: San Francisco, the United States of America (41 KM, 25 Miles).

What to Wear in San Rafael in September

Warm but pleasant conditions in San Rafael in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Dry conditions mean you won't need to worry about rain protection. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in San Rafael in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

10/10

Cycling

8/10

Walking

8/10

Barbeque

10/10

Camping

10/10

Outdoor sports

8/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our San Rafael's climate page.

More climate data for San Rafael

Temperature Rainfall Sunshine Humidity

See the full San Rafael climate overview or explore weather in the United States of America.