When to go · San Bernardino
San Bernardino, month by month
The best months for San Bernardino: Mar, Apr, May, Oct, Nov. Months to avoid: Jul, Aug.
Month by month
- JanuaryMixedOutside the best window (Mar–May, Oct–Nov). Across United States: Cold and snowy north and in the mountains; Florida, Hawaii and the desert Southwest are the picks.20 °C / 6 °C, 6 rain days68 °F / 43 °F, 6 rain daysCrowds: Low
- FebruaryMixedOutside the best window (Mar–May, Oct–Nov). Across United States: Still winter north; ski season in the Rockies; Presidents' Day weekend busy. Mardi Gras in New Orleans (date varies).21 °C / 7 °C, 6 rain days70 °F / 45 °F, 6 rain daysCrowds: Low · 1 festival or holiday
- MarchGreatInside San Bernardino's best window: Mar–May, Oct–Nov.23 °C / 8 °C, 5 rain days73 °F / 46 °F, 5 rain daysCrowds: Medium · 2 festivals or holidays
- AprilGreatInside San Bernardino's best window: Mar–May, Oct–Nov.25 °C / 9 °C, 3 rain days77 °F / 48 °F, 3 rain daysCrowds: Medium · 1 festival or holiday
- MayGreatInside San Bernardino's best window: Mar–May, Oct–Nov.29 °C / 12 °C, 2 rain days84 °F / 54 °F, 2 rain daysCrowds: Medium · 1 festival or holiday
- JuneGoodOutside the best window (Mar–May, Oct–Nov). Across United States: Rockies and northern parks open; desert heat builds; hurricane season starts. Book parks months ahead.32 °C / 15 °C, 1 rain days90 °F / 59 °F, 1 rain daysCrowds: High
- JulyAvoidListed as a month to avoid: Jul–Aug (95–100°F highs), and Santa Ana wind days.36 °C / 18 °C, 0 rain days97 °F / 64 °F, 0 rain daysCrowds: High · 1 festival or holiday
- AugustAvoidListed as a month to avoid: Jul–Aug (95–100°F highs), and Santa Ana wind days.36 °C / 18 °C, 1 rain days97 °F / 64 °F, 1 rain daysCrowds: High
- SeptemberGoodOutside the best window (Mar–May, Oct–Nov). Across United States: After Labor Day the crowds drop and parks stay open; Florida and the Gulf are at hurricane peak.34 °C / 16 °C, 1 rain days93 °F / 61 °F, 1 rain daysCrowds: Medium · 1 festival or holiday
- OctoberGreatInside San Bernardino's best window: Mar–May, Oct–Nov.29 °C / 12 °C, 2 rain days84 °F / 54 °F, 2 rain daysCrowds: Medium
- NovemberGreatInside San Bernardino's best window: Mar–May, Oct–Nov.24 °C / 8 °C, 3 rain days75 °F / 46 °F, 3 rain daysCrowds: Medium · 1 festival or holiday
- DecemberMixedOutside the best window (Mar–May, Oct–Nov). Across United States: Holiday lights in New York, ski season opens; flights and hotels peak around Christmas and New Year.19 °C / 5 °C, 5 rain days66 °F / 41 °F, 5 rain daysCrowds: High · 1 festival or holiday