When to go · San Bruno
San Bruno, month by month
The best months for San Bruno: Apr, May, Jun, Sep, Oct. Months to avoid: Jan, Feb, Mar, Nov, Dec.
Month by month
- JanuaryAvoidListed as a month to avoid: Nov–Mar (rain), summer fog on the coast side.14 °C (57 °F) / 7 °C (45 °F), 11 rain days57 °F (14 °C) / 45 °F (7 °C), 11 rain daysCrowds: Low
- FebruaryAvoidListed as a month to avoid: Nov–Mar (rain), summer fog on the coast side.15 °C (59 °F) / 8 °C (46 °F), 10 rain days59 °F (15 °C) / 46 °F (8 °C), 10 rain daysCrowds: Low · 1 festival or holiday
- MarchAvoidListed as a month to avoid: Nov–Mar (rain), summer fog on the coast side.16 °C (61 °F) / 8 °C (46 °F), 10 rain days61 °F (16 °C) / 46 °F (8 °C), 10 rain daysCrowds: Medium · 2 festivals or holidays
- AprilGreatInside San Bruno's best window: Apr–Jun, Sep–Oct.17 °C (63 °F) / 9 °C (48 °F), 6 rain days63 °F (17 °C) / 48 °F (9 °C), 6 rain daysCrowds: Medium · 1 festival or holiday
- MayGreatInside San Bruno's best window: Apr–Jun, Sep–Oct.18 °C (64 °F) / 10 °C (50 °F), 4 rain days64 °F (18 °C) / 50 °F (10 °C), 4 rain daysCrowds: Medium · 1 festival or holiday
- JuneGreatInside San Bruno's best window: Apr–Jun, Sep–Oct.20 °C (68 °F) / 11 °C (52 °F), 2 rain days68 °F (20 °C) / 52 °F (11 °C), 2 rain daysCrowds: High
- JulyMixedOutside the best window (Apr–Jun, Sep–Oct). Across United States: Peak season: parks full, 4 July crowds, 40 °C (104 °F)+ in the desert, humid East. Alaska and the Pacific Northwest are at their best.Outside the best window (Apr–Jun, Sep–Oct). Across United States: Peak season: parks full, 4 July crowds, 104 °F (40 °C)+ in the desert, humid East. Alaska and the Pacific Northwest are at their best.21 °C (70 °F) / 12 °C (54 °F), 1 rain days70 °F (21 °C) / 54 °F (12 °C), 1 rain daysCrowds: High · 1 festival or holiday
- AugustMixedOutside the best window (Apr–Jun, Sep–Oct). Across United States: Hot and busy; wildfire smoke in the West, hurricane peak begins in the Southeast.21 °C (70 °F) / 13 °C (55 °F), 1 rain days70 °F (21 °C) / 55 °F (13 °C), 1 rain daysCrowds: High
- SeptemberGreatInside San Bruno's best window: Apr–Jun, Sep–Oct.22 °C (72 °F) / 12 °C (54 °F), 2 rain days72 °F (22 °C) / 54 °F (12 °C), 2 rain daysCrowds: Medium · 1 festival or holiday
- OctoberGreatInside San Bruno's best window: Apr–Jun, Sep–Oct.21 °C (70 °F) / 11 °C (52 °F), 4 rain days70 °F (21 °C) / 52 °F (11 °C), 4 rain daysCrowds: Medium
- NovemberAvoidListed as a month to avoid: Nov–Mar (rain), summer fog on the coast side.17 °C (63 °F) / 9 °C (48 °F), 8 rain days63 °F (17 °C) / 48 °F (9 °C), 8 rain daysCrowds: Medium · 1 festival or holiday
- DecemberAvoidListed as a month to avoid: Nov–Mar (rain), summer fog on the coast side.14 °C (57 °F) / 7 °C (45 °F), 10 rain days57 °F (14 °C) / 45 °F (7 °C), 10 rain daysCrowds: High · 1 festival or holiday
Compare two months
Weather, crowds and prices for any two months in San Bruno, side by side.
Verdict
Apr: Great
May: Great
Daytime high
Apr: 17 °C (63 °F)63 °F (17 °C)
May: 18 °C (64 °F)64 °F (18 °C)
Night low
Apr: 9 °C (48 °F)48 °F (9 °C)
May: 10 °C (50 °F)50 °F (10 °C)
Rain days
Apr: 6
May: 4 (better)
Crowds
Apr: Medium
May: Medium
Prices
Apr: Medium
May: Medium
Festivals listed
Apr: 1
May: 1
April: Inside San Bruno's best window: Apr–Jun, Sep–Oct.
May: Inside San Bruno's best window: Apr–Jun, Sep–Oct.
San Bruno: figures are long-term averages from this guide, not a forecast.