Calwa, California Weather
Bay laurel fragrance sweetens shade. Day 90 of spring. Read this microseason across nine climate regions →
Calwa weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 17Clear——99°69°—
- ThursdayJun 18Clear——98°68°-1°
- FridayJun 19Clear——95°66°-3°
- SaturdayJun 20Clear——94°63°-1°
- SundayJun 21Clear——98°67°+4°
- MondayJun 22Clear——102°71°+4°
- TuesdayJun 23Clear——106°74°+4°
AQI 37 (Good), driven by PM2.5. AQI down 12 over the last 6 hours (gradual decline). PM2.5 at 11.8 µg/m³ (AQI 56) with a 0.87 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
PM × Wind × Precip
PM2.5 at 11.8 µg/m³ (AQI 56) with a 0.87 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.87
- Wind
- calm
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).








































A summer fog for fair, a winter fog for rain.
- Moonrise
- 8:16 AM
- Moonset
- 10:29 PM
- In sign
- ♌︎ Leo
Bay laurel fragrance sweetens shade
Calwa at a glance
- Today vs. normal: 9°F below the seasonal normal for this latitude
- Last frost: March 27 (climatological average for this latitude)
- Microseason: Jun 16–20
- Planting window: Stake and prune tomato suckers. Watch for squash vine borers.
16-Day Forecast — Calwa
- Wed99°69°1%
- Thu98°68°1%
- Fri95°66°0%
- Sat94°63°0%
- Sun98°67°0%
- Mon102°71°0%
- Tue106°74°0%
- Wed107°77°1%
- Thu109°79°2%
- Fri110°80°0%
- Sat109°80°0%
- Sun110°81°0%
- Mon107°77°0%
- Tue108°76°0%
- Wed106°78°0%
- Thu109°80°3%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of June 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.
Microseason · June 16–20
Bay laurel fragrance sweetens shade
In cooler coastal canyons, bay laurel foliage releases its sharp, anise-like scent as temperatures climb.
Day 168 of 365 · Wedge 34 of 72
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | — | — |
| February | — | — |
| March | — | — |
| April | lettuce, peas, spinach, radishes | — |
| May | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| July | tomatoes, peppers, beans, squash | tomatoes, beans, summer squash |
| August | — | tomatoes, beans, summer squash |
| September | fall brassicas, garlic (overwinter), carrots | tomatoes, beans, summer squash |
| October | fall brassicas, garlic (overwinter), carrots | winter squash, tomatoes (last) |
| November | — | — |
| December | — | — |
A year in weather
Calwa peaks at about 84°F in July and bottoms near 48°F in December; January brings the heaviest rain (2.2 inches) and August the least (0.0 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 48° | 2.2″ | 5 |
| February | 52° | 1.9″ | 5 |
| March | 57° | 1.9″ | 4 |
| April | 62° | 1.0″ | 2 |
| May | 70° | 0.4″ | 1 |
| June | 78° | 0.2″ | 0 |
| July | 84° | 0.0″ | 0 |
| August | 82° | 0.0″ | 0 |
| September | 77° | 0.1″ | 0 |
| October | 67° | 0.6″ | 1 |
| November | 55° | 0.9″ | 2 |
| December | 48° | 1.8″ | 4 |
Frequently asked
- When does it freeze in Calwa?
- Frost typically leaves Calwa by mid-April and returns to Calwa near mid-November.
- What is the rainy season in Calwa?
- Calwa sees its heaviest rain in January (around 2.2 inches), part of roughly 11 inches a year.
- What is the warmest month in Calwa?
- July is Calwa's warmest month, averaging about 84°F.
- What is the coldest month in Calwa?
- Calwa bottoms out in December, with a mean near 48°F.
- When can I start a vegetable garden in Calwa?
- Frost-hardy sowings begin at mid-April in Calwa; warm-season starts follow two weeks on.
- How many rainy days does Calwa get?
- Calwa averages about 26 days with measurable rain or snow each year.
- What hardiness zone is Calwa?
- Calwa's hardiness zone tracks its winter low; with December near 48°F, check the USDA ZIP map for the exact zone.
- What is the 10-day forecast for Calwa?
- Calwa's extended outlook — daily high and low temperatures and precipitation chances for each upcoming day — is in the daily forecast above.
- Will it rain this week in Calwa?
- See this week's day-by-day rain chances for Calwa in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Calwa?
- Current conditions for Calwa and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Calwa forecast updated?
- The Calwa forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Calwa?
- Day length in Calwa peaks around the June solstice — earliest sunrise and latest sunset — and is shortest near the December solstice.
- How accurate is the weather forecast for Calwa?
- The next few days in Calwa's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Climate
Calwa's hot-summer Mediterranean climate in California pairs 48°F Januarys with 84°F Julys, 36°F apart across the seasons.
Calwa sees close to 11 inches of precipitation annually, falling across some 26 wet days.
At 36.7°N, Calwa's 36°F summer-to-winter swing sets when Calwa's gardens wake and when frost returns.
ZIP codes in Calwa
- 93725