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 (70 °F) / 4 °C (39 °F), 6 rain days70 °F (21 °C) / 39 °F (4 °C), 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 (70 °F) / 5 °C (41 °F), 6 rain days70 °F (21 °C) / 41 °F (5 °C), 6 rain daysCrowds: Low · 1 festival or holiday
- MarchGreatInside Simi Valley's best window: Mar–May, Oct–Nov.23 °C (73 °F) / 6 °C (43 °F), 5 rain days73 °F (23 °C) / 43 °F (6 °C), 5 rain daysCrowds: Medium · 2 festivals or holidays
- AprilGreatInside Simi Valley's best window: Mar–May, Oct–Nov.26 °C (79 °F) / 7 °C (45 °F), 3 rain days79 °F (26 °C) / 45 °F (7 °C), 3 rain daysCrowds: Medium · 1 festival or holiday
- MayGreatInside Simi Valley's best window: Mar–May, Oct–Nov.28 °C (82 °F) / 9 °C (48 °F), 1 rain days82 °F (28 °C) / 48 °F (9 °C), 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 (88 °F) / 12 °C (54 °F), 0 rain days88 °F (31 °C) / 54 °F (12 °C), 0 rain daysCrowds: High
- JulyAvoidListed as a month to avoid: Jul–Sep (inland heat, often 35 °C (95 °F)+), Thanksgiving, Christmas and New Year's Day at the Reagan Library.Listed as a month to avoid: Jul–Sep (inland heat, often 95 °F (35 °C)+), Thanksgiving, Christmas and New Year's Day at the Reagan Library.35 °C (95 °F) / 14 °C (57 °F), 0 rain days95 °F (35 °C) / 57 °F (14 °C), 0 rain daysCrowds: High · 1 festival or holiday
- AugustAvoidListed as a month to avoid: Jul–Sep (inland heat, often 35 °C (95 °F)+), Thanksgiving, Christmas and New Year's Day at the Reagan Library.Listed as a month to avoid: Jul–Sep (inland heat, often 95 °F (35 °C)+), Thanksgiving, Christmas and New Year's Day at the Reagan Library.36 °C (97 °F) / 14 °C (57 °F), 0 rain days97 °F (36 °C) / 57 °F (14 °C), 0 rain daysCrowds: High
- SeptemberAvoidListed as a month to avoid: Jul–Sep (inland heat, often 35 °C (95 °F)+), Thanksgiving, Christmas and New Year's Day at the Reagan Library.Listed as a month to avoid: Jul–Sep (inland heat, often 95 °F (35 °C)+), Thanksgiving, Christmas and New Year's Day at the Reagan Library.34 °C (93 °F) / 13 °C (55 °F), 0 rain days93 °F (34 °C) / 55 °F (13 °C), 0 rain daysCrowds: Medium · 1 festival or holiday
- OctoberGreatInside Simi Valley's best window: Mar–May, Oct–Nov.29 °C (84 °F) / 9 °C (48 °F), 1 rain days84 °F (29 °C) / 48 °F (9 °C), 1 rain daysCrowds: Medium
- NovemberGreatInside Simi Valley's best window: Mar–May, Oct–Nov.24 °C (75 °F) / 6 °C (43 °F), 3 rain days75 °F (24 °C) / 43 °F (6 °C), 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 (68 °F) / 3 °C (37 °F), 5 rain days68 °F (20 °C) / 37 °F (3 °C), 5 rain daysCrowds: High · 1 festival or holiday
Compare two months
Weather, crowds and prices for any two months in Simi Valley, side by side.
Verdict
Mar: Great
Apr: Great
Daytime high
Mar: 23 °C (73 °F)73 °F (23 °C)
Apr: 26 °C (79 °F)79 °F (26 °C)
Night low
Mar: 6 °C (43 °F)43 °F (6 °C)
Apr: 7 °C (45 °F)45 °F (7 °C)
Rain days
Mar: 5
Apr: 3 (better)
Crowds
Mar: Medium
Apr: Medium
Prices
Mar: Medium
Apr: Medium
Festivals listed
Mar: 2
Apr: 1
March: Inside Simi Valley's best window: Mar–May, Oct–Nov.
April: Inside Simi Valley's best window: Mar–May, Oct–Nov.
Simi Valley: figures are long-term averages from this guide, not a forecast.