Long Beach, California Weather
Ceanothus blooms again. Day 93 of summer. Read this microseason across nine climate regions →
Long Beach weather forecast — hour by hour, 7-day outlook, NOAA radar
Conditions updated 7:23 AM PDT · Open-Meteo
- TodaySep 21Overcast——75°66°—
- TuesdaySep 22Clear——76°63°+1°
- WednesdaySep 23Mostly Clear——79°62°+3°
- ThursdaySep 24Clear——82°70°+3°
- FridaySep 25Overcast——85°71°+3°
- SaturdaySep 26Overcast——86°73°+1°
- SundaySep 27Partly Cloudy——83°73°-3°
Air quality now AQI 50 · Good
AQI 50 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 11.6 µg/m³ (AQI 56) with a 0.69 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in stagnant 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
Ozone × UV × Sky
Ozone at AQI 38. Overcast through the UV peak window (cloud cover ~63%) — afternoon ozone should stay flat.
- Present
- AQI 38
- UV peak
- 0.3 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 5
PM × Wind × Precip
PM2.5 at 11.6 µg/m³ (AQI 56) with a 0.69 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in stagnant air, not road dust.
- PM2.5/PM10
- 0.69
- 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).
September dries up ditches or breaks down bridges.
- Moonrise
- 4:11 PM
- Moonset
- 1:37 AM
- In sign
- ♑︎ Capricorn
Ceanothus blooms again
Read this microseason across nine climate regions →
All 72 microseasons on the year wheel →
Long Beach at a glance
- Today vs. normal: Today averages 71°F (high 75°F, low 66°F), about the 71°F normal for Sep 21
- Last frost: None in most years — 32°F in 1% of 1991–2020 years (NOAA station 3 km away)
- Microseason: Sep 21–25
- Planting calendar: September — plant lettuce, peas, spinach, radishes, beans, squash; harvest lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash, winter squash
16-Day Forecast — Long Beach
- Mon75°66°4%
- Tue76°63°0%
- Wed79°62°0%
- Thu82°70°1%
- Fri85°71°1%
- Sat86°73°1%
- Sun83°73°1%
- Mon88°71°4%
- Tue88°74°4%
- Wed95°80°7%
- Thu95°77°1%
- Fri94°79°11%
- Sat90°77°10%
- Sun91°78°9%
- Mon91°77°7%
- Tue88°78°6%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Long Beach
Interactive wind and temperature map centered on Long Beach — it loads in your browser. Open the full weather map.
Right now in the garden
Year-round growing
As of September 21, sowing here runs through the year. Freezes are uncommon, so there is no frost date to plan around; heat and rainfall set the calendar instead. This city's planting calendar for September: plant lettuce, peas, spinach, radishes, beans, and squash; harvest lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash, and winter squash.
Sun & seasons in Long Beach
Long Beach sits in Los Angeles County, where the year’s longest day runs 14h 24m of daylight and its shortest just 9h 54m — a swing of +4h 30m between the June and December solstices. Clocks spring forward on Sunday, March 8, 2026 and fall back on Sunday, November 1, 2026.
Los Angeles, the state’s largest city, lies about 26 miles to the NNW. The nearest town Long Beach tracks is Torrance, roughly 10 miles to the WNW.
Air quality in Long Beach
Air quality in Long Beach’s county has trended cleaner since 2020; its cleanest year on record was 2023 (median AQI 67). See the full air-quality history for Long Beach.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | lettuce, peas, spinach, radishes | lettuce, peas, spinach, radishes |
| February | lettuce, peas, spinach, radishes | lettuce, peas, spinach, radishes |
| March | lettuce, peas, spinach, radishes | lettuce, peas, spinach, radishes |
| April | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes |
| May | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes |
| June | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash |
| July | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash, winter squash |
| August | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash, winter squash |
| September | lettuce, peas, spinach, radishes, beans, squash | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash, winter squash |
| October | lettuce, peas, spinach, radishes | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash, winter squash |
| November | lettuce, peas, spinach, radishes | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash, winter squash |
| December | lettuce, peas, spinach, radishes | lettuce, peas, spinach, radishes |
A year in weather
Long Beach's warmest month is August (~73°F mean) and its coldest is January (~54°F). Rainfall peaks in February (2.3 inches) and bottoms out in August (0.0 inches).
| Month | Mean temp | Precip |
|---|---|---|
| January | 54° | 2.2″ |
| February | 55° | 2.3″ |
| March | 57° | 1.8″ |
| April | 61° | 0.8″ |
| May | 64° | 0.2″ |
| June | 67° | 0.0″ |
| July | 72° | 0.1″ |
| August | 73° | 0.0″ |
| September | 71° | 0.0″ |
| October | 67° | 0.3″ |
| November | 60° | 1.0″ |
| December | 54° | 1.7″ |
Regional context
Similar climates Signal Hill, CA, Lakewood, CA, Rossmoor, CA
By modelled 1991-2020 normals (EC_Earth3P_HR model via Open-Meteo), Long Beach sees 54°F Januarys and 72°F Julys, an 18°F range, plus around 10.6 inches of precipitation.
Precipitation in Long Beach peaks in the cool season: February averages 2.3 inches, while August bottoms out at 0.0 inches. It is a winter-storm rhythm Long Beach shares with places like Signal Hill, CA, Lakewood, CA and Rossmoor, CA.
Freezes are uncommon in Long Beach, where the coldest month averages 54°F; cool-season crops grow fall through spring. Summer heat in August (about 73°F) is the binding constraint, not cold. Long Beach beds by a wall stay warmer at night.
Similar climates: Signal Hill, CA, Lakewood, CA, Rossmoor, CA, Carson, CA, Hawaiian Gardens, CA.
Frequently asked
- When does it freeze in Long Beach?
- Most years Long Beach doesn't freeze: the nearest NOAA station reached 32°F in 1% of 1991–2020 years, so Long Beach has no reliable frost date.
- What is the rainy season in Long Beach?
- Long Beach sees its heaviest rain in February (around 2.3 inches), part of roughly 11 inches a year.
- What is the warmest month in Long Beach?
- On average August tops the year in Long Beach at about 73°F.
- What is the coldest month in Long Beach?
- The coldest stretch in Long Beach falls in January, around 54°F on average.
- When can I start a vegetable garden in Long Beach?
- Start whenever suits in Long Beach — freezes are too rare for a frost date — and save lettuce and peas for Long Beach's coolest stretch, near 54°F.
- What hardiness zone is Long Beach?
- Since January in Long Beach averages 54°F, Long Beach's USDA zone follows that floor — confirm it by ZIP.
- What is the 10-day forecast for Long Beach?
- Long Beach'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 Long Beach?
- See this week's day-by-day rain chances for Long Beach in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Long Beach?
- Current conditions for Long Beach and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Long Beach forecast updated?
- The Long Beach forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Long Beach?
- Today's sunrise and sunset times for Long Beach are in the Almanac section above, along with civil dawn, civil dusk, and day length. Day length is longest near the summer solstice and shortest near the winter solstice.
- How accurate is the weather forecast for Long Beach?
- The next few days in Long Beach's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Long Beach sits at 33.8°N; its climate zone is hot-summer Mediterranean (Köppen approximation).
ZIP codes in Long Beach
- 90801
- 90802
- 90803
- 90804
- 90805
- 90806
- 90807
- 90808
- 90809
- 90810
- 90813
- 90814
- 90815
- 90822
- 90831
- 90832
- 90833
- 90840
- 90842
- 90844
- 90846
- 90847
- 90848
- 90853