Weather in Westminster, California
Fog and sun in daily rhythm. Day 59 of spring. Read this microseason across nine climate regions →
When the dew is on the grass, rain will never come to pass.
- Moonrise
- 1:06 PM
- Moonset
- 3:16 AM
- In sign
- ♉︎ Taurus
Fog and sun in daily rhythm
Westminster at a glance
- Today vs. normal: NaN°F below the seasonal normal for this latitude
- Last frost: March 10 (climatological average for this latitude)
- Microseason: 28 of 72, May 16–20
- Planting window: Direct sow okra, melons, and southern peas. Thin carrot rows.
Right now in the garden
Peak growing season
As of May 17, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | — | — |
| February | — | — |
| March | lettuce, peas, spinach, radishes | — |
| April | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | — |
| May | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| July | — | tomatoes, beans, summer squash |
| August | — | tomatoes, beans, summer squash |
| September | — | tomatoes, beans, summer squash |
| October | fall brassicas, garlic (overwinter), carrots | winter squash, tomatoes (last) |
| November | fall brassicas, garlic (overwinter), carrots | — |
| December | — | — |
A year in weather
August is Westminster's warmest month (around 75°F mean) and December its coldest (about 58°F). Rainfall peaks in February at 3.2 inches and bottoms out in August at 0.0 inches.
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 59° | 2.9″ | 5 |
| February | 59° | 3.2″ | 5 |
| March | 62° | 1.7″ | 3 |
| April | 64° | 0.8″ | 2 |
| May | 66° | 0.3″ | 1 |
| June | 70° | 0.1″ | 0 |
| July | 74° | 0.0″ | 0 |
| August | 75° | 0.0″ | 0 |
| September | 74° | 0.1″ | 0 |
| October | 69° | 0.5″ | 1 |
| November | 63° | 0.8″ | 2 |
| December | 58° | 2.2″ | 4 |
Regional context
Westminster belongs to a hot-summer Mediterranean climate region. This grouping shares comparable temperature ranges, seasonal timing, and growing conditions with nearby cities.
Similar climates: Los Angeles, CA, San Francisco, CA, San Diego, CA, Riverside, CA, Sacramento, CA.
Naturalist notes
By late May, fledgling American crows are leaving their nests in suburban trees, their hoarse begging calls a reliable sign that spring is advancing toward summer.
Shortly after the summer solstice, the evening sky stays bright past 8 p.m., with Venus appearing low in the west as dusk deepens.
Frequently asked
- When does it freeze in Westminster?
- Westminster's last spring frost usually arrives around mid-March, with the first fall frost near mid-December.
- What is the rainy season in Westminster?
- February is the wettest month, averaging 3.2 inches of rain; the city receives about 13 inches annually.
- What is the warmest month in Westminster?
- August is typically the warmest month, averaging about 75°F.
- What is the coldest month in Westminster?
- December is typically the coldest month, averaging about 58°F.
- When can I start a vegetable garden in Westminster?
- Cool-season crops such as peas and lettuce can be sown around the last spring frost (mid-March), while warm-season crops like tomatoes and peppers should wait until 1–2 weeks after.
- How many rainy days does Westminster get?
- Westminster averages roughly 22 rainy days per year.
- What hardiness zone is Westminster?
- Westminster's USDA hardiness zone reflects its lowest average winter temperature; refer to the USDA's online lookup with the city ZIP for the current zone designation.
Climate
Westminster, California lies within a hot-summer Mediterranean climate zone. Mean temperatures for January hover near 59°F while July averages 74°F, a 15°F seasonal swing.
The city receives about 13 inches of precipitation across roughly 22 rainy days each year.
Latitude (33.8°N), nearby large water bodies, and elevation set the yearly rhythm. These factors determine what can grow, when frost is likely, and the daily weather story.