When to go · San Bruno
San Bruno in September
Great month. Inside San Bruno's best window: Apr–Jun, Sep–Oct.
Key facts
- Verdict
- Great
- Temperature
- 22°C (72°F)72°F (22°C) / 12°C (54°F)54°F (12°C)
- average high / low
- Rain days
- 2
- Crowds
- Medium
- United States overall
- Prices
- Medium
- United States overall
Verdict
Inside San Bruno's best window: Apr–Jun, Sep–Oct.
Is another month better than September?
No other month rates higher than September for San Bruno in this guide.
Weather in September
- San BrunoHighs around 22 °C (72 °F), lows around 12 °C (54 °F), rain on about 2 daysHighs around 72 °F (22 °C), lows around 54 °F (12 °C), rain on about 2 days
Festivals and holidays
Dates as our data lists them. Moving holidays (lunar and Islamic calendars, Easter) shift every year: check the date for your year before you build a trip on it.
Labor Day big impact
1st Monday of September · United States
End of summer; last big road-trip weekend.
Crowds and prices
- Crowds · United States overall
- Medium
- Prices · United States overall
- Medium
United States overall: After Labor Day the crowds drop and parks stay open; Florida and the Gulf are at hurricane peak.
Compare two months
Weather, crowds and prices for any two months in San Bruno, side by side.
Verdict
Sep: Great
Apr: Great
Daytime high
Sep: 22 °C (72 °F)72 °F (22 °C)
Apr: 17 °C (63 °F)63 °F (17 °C)
Night low
Sep: 12 °C (54 °F)54 °F (12 °C)
Apr: 9 °C (48 °F)48 °F (9 °C)
Rain days
Sep: 2 (better)
Apr: 6
Crowds
Sep: Medium
Apr: Medium
Prices
Sep: Medium
Apr: Medium
Festivals listed
Sep: 1
Apr: 1
September: Inside San Bruno's best window: Apr–Jun, Sep–Oct.
April: Inside San Bruno's best window: Apr–Jun, Sep–Oct.
San Bruno: figures are long-term averages from this guide, not a forecast.
What to pack
- A warm layer for the evenings