# Simi Valley Weather: A Complete Guide to Conditions Year-Round
Simi Valley, California, is renowned for its sunny skies and comfortable climate. Nestled in the picturesque Santa Susana Mountains, this city enjoys a Mediterranean climate with warm, dry summers and mild, wet winters. Planning a trip or deciding whether to move to Simi Valley? Understanding the weather patterns throughout the year is key. This guide provides a detailed month-by-month breakdown of what you can expect, helping you make the most of your time in this beautiful Californian locale.
## **Overview of Simi Valley’s Climate**
Simi Valley benefits from its inland location, shielded from the cooler Pacific breezes that significantly affect coastal areas. This results in warmer temperatures throughout the year, particularly during the summer months. The Santa Susana Mountains also contribute by creating a rain shadow effect, reducing rainfall compared to surrounding regions. The typical temperature range throughout the year is between 45°F and 88°F.
## **Spring: Blooming Beauty & Warming Days (March - May)**
Spring in Simi Valley is a delightful time of year. Wildflowers paint the hillsides, and the temperatures begin to climb.
* **March:** The weather is transitioning, with average highs around 68°F and lows around 47°F. Rainfall is still common, with around 1.5 inches expected.
* **April:** A truly pleasant month. Expect average highs of 73°F and lows of 51°F. Rainfall decreases to about 0.75 inches.
* **May:** Warm and sunny days become the norm. Average highs climb to 78°F with lows around 56°F. Rainfall is minimal, typically less than 0.5 inches.
Spring is perfect for hiking, biking, and enjoying the outdoors. Be prepared for occasional wind gusts, especially in the afternoons.
## **Summer: Sunshine & Warm Temperatures (June - August)**
Summers in Simi Valley are hot and dry. This is the peak tourist season, with visitors flocking to enjoy the consistent sunshine.
* **June:** The heat is on! Average highs reach 84°F and lows around 62°F. Very little rainfall is expected.
* **July:** The hottest month of the year. Average highs soar to 88°F, with lows around 65°F. Humidity remains low, making the heat more bearable than in more humid climates.
* **August:** Similar to July, with average highs of 87°F and lows around 64°F. Be prepared for occasional heat waves where temperatures can exceed 100°F.
Summer activities include swimming, outdoor concerts, and exploring local parks. Staying hydrated and seeking shade during peak hours is essential.
## **Autumn: Golden Hues & Mild Weather (September - November)**
Autumn brings a welcome change, with temperatures gradually cooling and the landscape transforming into shades of gold and brown.
* **September:** A continuation of summer-like conditions, with average highs around 84°F and lows around 62°F. Dry conditions persist.
* **October:** Pleasant and mild. Average highs drop to 77°F and lows around 56°F. The first hints of rain may appear, with around 0.75 inches expected.
* **November:** Cooler temperatures and increased rainfall. Average highs are around 68°F and lows around 47°F. Expect around 1.5 inches of rain this month.
Autumn is an excellent time for hiking and outdoor adventures, offering comfortable temperatures and stunning scenery.
## **Winter: Mild Days & Occasional Rain (December - February)**
Winters in Simi Valley are mild compared to much of the United States. While it rarely snows, rainfall is common.
* **December:** Cool and wet. Average highs are around 64°F and lows around 44°F. This is one of the wetter months, with around 2 inches of rain.
* **January:** The coolest month, but still relatively mild. Average highs are 63°F and lows around 43°F. Rainfall is similar to December at around 2 inches.
* **February:** A transition month, with temperatures starting to rise. Average highs are 66°F and lows around 45°F. Expect around 1.75 inches of rain.
Winter is a good time to explore indoor attractions or enjoy a cozy day by the fireplace.
## **Simi Valley Weather by Month: A Quick Reference Table**
| Month | Avg. High (°F) | Avg. Low (°F) | Rainfall (inches) |
|-----------|-----------------|----------------|-------------------|
| January | 63 | 43 | 1.75 |
| February | 66 | 45 | 1.75 |
| March | 68 | 47 | 1.5 |
| April | 73 | 51 | 0.75 |
| May | 78 | 56 | 0.5 |
| June | 84 | 62 | 0.25 |
| July | 88 | 65 | 0.1 |
| August | 87 | 64 | 0.2 |
| September | 84 | 62 | 0.2 |
| October | 77 | 56 | 0.75 |
| November | 68 | 47 | 1.5 |
| December | 64 | 44 | 2 |
## **Frequently Asked Questions (FAQ)**
**Q: Does it ever snow in Simi Valley?**
A: Extremely rarely. Snow is uncommon due to Simi Valley’s relatively low elevation and warm temperatures.
**Q: What is the windiest month in Simi Valley?**
A: Generally, February and March tend to be the windiest months, often experiencing Santa Ana winds.
**Q: What should I pack if I'm visiting in the summer?**
A: Pack light clothing, sunscreen, a hat, and sunglasses. A light jacket or sweater is recommended for cooler evenings.
**Q: Is Simi Valley prone to wildfires?**
A: Yes, unfortunately, Simi Valley is in a high-risk wildfire area, particularly during the dry, windy months of late summer and fall. Pay attention to fire warnings and conditions.
**Q: What is the average humidity in Simi Valley?**
A: The average humidity is relatively low, especially during the summer months, typically around 60-70%. This contributes to the dry, comfortable heat.
## **Resources for Simi Valley Weather**
* **National Weather Service - Oxnard, CA:** [https://www.weather.gov/lox/](https://www.weather.gov/lox/)
* **AccuWeather - Simi Valley, CA:** [https://www.accuweather.com/en/us/simi-valley/93065/daily-weather-forecast/349583](https://www.accuweather.com/en/us/simi-valley/93065/daily-weather-forecast/349583)
* **City of Simi Valley Website:** [https://www.simivalley.org/](https://www.simivalley.org/)
* **Ventura County Fire Department:** [https://www.venturaCountyFire.org/](https://www.venturaCountyFire.org/) (for wildfire information)
* **Local News - The Simi Valley Acorn:** [https://www.simivalleyacorn.com/](https://www.simivalleyacorn.com/)
