San Bernardino Weather in August

San Bernardino in August sees moderate temperatures, with highs around 18°C (64°F) and overnight lows of 8°C (46°F). Rainfall is fairly high at around 168 mm (6.6 in) on average, so pack waterproofs just in case.

Rainfall in San Bernardino in August

Analyzing past climate data, one can expect approximately 19 days of rain, averaging 168 mm (6.6 in). Wet weather is a regular and significant part of this month. Frequent days of rain combined with high totals means proper waterproofs are worth packing.

Temperature in San Bernardino in August

Expect highs of 18°C (64°F) in San Bernardino in August, with nights dropping to around 8°C (46°F). Summer occurs in August. Even when the weather is stable, mornings and evenings can still feel distinctly cool. With overnight lows of 8°C (46°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.

Sunshine in San Bernardino in August

The area enjoys a balanced 184 hours of sunlight, ensuring it's neither too overcast nor too sunny.

If you favor pleasant temperatures and minimal rainfall, August is one of the best months to visit San Bernardino.

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• January
• February
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• May
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For a detailed overview over the year and the best time to visit Switzerland, check out our San Bernardino's climate page.

San Bernardino Temperature in August

Min Temperature 8°C (46°F)  

Max Temperature 18°C (64°F)  

Chance of Rain 64%  

Precipitation 168 mm (6.6 in)  

Rainy days 19 days  

Humidity 74% *  

Sunshine 184 hours *  

Percentage Sunshine 52% *  

* Data from: Disentis, Switzerland (37 KM, 23 Miles).

What to Wear in San Bernardino in August

For San Bernardino in August, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Also bring a poncho, it will rain a lot! Waterproof everything you can. Sunglasses could come in handy during the sunnier parts of your trip.

What To Do in San Bernardino in August

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

Swimming

6/10

Cycling

5/10

Walking

5/10

Camping

3/10

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 Switzerland, check out our San Bernardino's climate page.

More climate data for San Bernardino

Temperature Rainfall Sunshine Humidity

See the full San Bernardino climate overview or explore weather in Switzerland.