When to go · Simi Valley
Simi Valley, month by month
The best months for Simi Valley: Mar, Apr, May, Oct, Nov. Months to avoid: Jul, Aug, Sep.
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.21 °C / 4 °C, 6 rain days70 °F / 39 °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 / 5 °C, 6 rain days70 °F / 41 °F, 6 rain daysCrowds: Low · 1 festival or holiday
- MarchGreatInside Simi Valley's best window: Mar–May, Oct–Nov.23 °C / 6 °C, 5 rain days73 °F / 43 °F, 5 rain daysCrowds: Medium · 2 festivals or holidays
- AprilGreatInside Simi Valley's best window: Mar–May, Oct–Nov.26 °C / 7 °C, 3 rain days79 °F / 45 °F, 3 rain daysCrowds: Medium · 1 festival or holiday
- MayGreatInside Simi Valley's best window: Mar–May, Oct–Nov.28 °C / 9 °C, 1 rain days82 °F / 48 °F, 1 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.31 °C / 12 °C, 0 rain days88 °F / 54 °F, 0 rain daysCrowds: High
- JulyAvoidListed as a month to avoid: Jul–Sep (inland heat, often 35 °C+), Thanksgiving, Christmas and New Year's Day at the Reagan Library.Listed as a month to avoid: Jul–Sep (inland heat, often 95 °F+), Thanksgiving, Christmas and New Year's Day at the Reagan Library.35 °C / 14 °C, 0 rain days95 °F / 57 °F, 0 rain daysCrowds: High · 1 festival or holiday
- AugustAvoidListed as a month to avoid: Jul–Sep (inland heat, often 35 °C+), Thanksgiving, Christmas and New Year's Day at the Reagan Library.Listed as a month to avoid: Jul–Sep (inland heat, often 95 °F+), Thanksgiving, Christmas and New Year's Day at the Reagan Library.36 °C / 14 °C, 0 rain days97 °F / 57 °F, 0 rain daysCrowds: High
- SeptemberAvoidListed as a month to avoid: Jul–Sep (inland heat, often 35 °C+), Thanksgiving, Christmas and New Year's Day at the Reagan Library.Listed as a month to avoid: Jul–Sep (inland heat, often 95 °F+), Thanksgiving, Christmas and New Year's Day at the Reagan Library.34 °C / 13 °C, 0 rain days93 °F / 55 °F, 0 rain daysCrowds: Medium · 1 festival or holiday
- OctoberGreatInside Simi Valley's best window: Mar–May, Oct–Nov.29 °C / 9 °C, 1 rain days84 °F / 48 °F, 1 rain daysCrowds: Medium
- NovemberGreatInside Simi Valley's best window: Mar–May, Oct–Nov.24 °C / 6 °C, 3 rain days75 °F / 43 °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.20 °C / 3 °C, 5 rain days68 °F / 37 °F, 5 rain daysCrowds: High · 1 festival or holiday