Weather in Rosamond, California
Fog and sun in daily rhythm. Day 58 of spring. Read this microseason across nine climate regions →
- TodayMay 16Clear—83°61°
- SundayMay 17Overcast—80°53°
- MondayMay 18Clear—75°48°
- TuesdayMay 19Clear—82°55°
- WednesdayMay 20Overcast—88°60°
- ThursdayMay 21Overcast—89°61°
- FridayMay 22Clear—90°61°
- PM 2.5
- 7.6 μg/m³
- PM 10
- 30.7 μg/m³
- NO₂
- 0.7 μg/m³
- Ozone
- 122.0 μg/m³
- UV Index
- 4.0 Moderate
Flowers blooming in late autumn, a sure sign of a bad winter coming.
- Moonrise
- 12:17 PM
- Moonset
- 2:06 AM
- In sign
- ♉︎ Taurus
Fog and sun in daily rhythm
Rosamond at a glance
- Today vs. normal: 77°F — typical for the season
- Last frost: March 16 (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 16, 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
Rosamond's warmest month is July (~82°F mean) and its coldest is December (~44°F). Rainfall peaks in February (1.8 inches) and bottoms out in August (0.0 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 45° | 1.5″ | 3 |
| February | 48° | 1.8″ | 3 |
| March | 54° | 1.0″ | 2 |
| April | 59° | 0.4″ | 1 |
| May | 68° | 0.1″ | 0 |
| June | 76° | 0.1″ | 0 |
| July | 82° | 0.1″ | 0 |
| August | 81° | 0.0″ | 0 |
| September | 74° | 0.1″ | 0 |
| October | 63° | 0.3″ | 1 |
| November | 51° | 0.4″ | 1 |
| December | 44° | 1.1″ | 2 |
Regional context
Rosamond sits within a hot-summer Mediterranean climate region — a cohort that shares similar temperature ranges, seasonal patterns, and growing conditions across nearby cities.
Similar climates: Los Angeles, CA, San Francisco, CA, San Diego, CA, Riverside, CA, Sacramento, CA.
Frequently asked
- When does it freeze in Rosamond?
- Rosamond's last spring frost typically falls around mid-March, and the first fall frost arrives around mid-December.
- What is the rainy season in Rosamond?
- February is the wettest month with about 1.8 inches of rain on average; the city receives roughly 7 inches annually.
- What is the warmest month in Rosamond?
- July is typically warmest, averaging about 82°F.
- What is the coldest month in Rosamond?
- December is typically coldest, averaging about 44°F.
- When can I start a vegetable garden in Rosamond?
- Cool-season crops (peas, lettuce) can be sown around the last spring frost (mid-March); warm-season crops (tomatoes, peppers) wait until 1–2 weeks after.
- How many rainy days does Rosamond get?
- Rosamond averages about 15 rainy days per year.
- What hardiness zone is Rosamond?
- Rosamond's USDA hardiness zone is determined by its lowest average winter temperature; check the USDA's online lookup with the city ZIP for the current zone designation.
Climate
Rosamond, California sits in a hot-summer Mediterranean climate zone. January means hover near 45°F while July averages 82°F — a 37°F seasonal swing.
Across the year, Rosamond receives about 7 inches of precipitation spread over roughly 15 rainy days.
The rhythm of the year is set by latitude (34.9°N), proximity to large water bodies, and elevation — all of which shape what grows here, when frost is likely, and what the weather story looks like day to day.