Long Beach climate

Name: Long Beach
Address: US

Long Beach is warmest in August, with average highs of 28 °C, and coldest in December, when nights average 7.8 °C. February is the wettest month (73 mm) and August the driest (0.4 mm). Figures are 1991–2020 climate normals.

Across a full year Long Beach averages 291 mm of rain, 111 days above 25 °C and 0 days below freezing.

United States · 9 m elevation · population 474,140 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month August 28 °C
Coldest month December 7.8 °C
Driest month August 0 mm
Wettest month February 73 mm
Least cloud August 23 % cloud
Hottest on record July 38 °C
Coldest on record December -1.1 °C
Warmest sea August 21 °C

What to expectLong Beach through the year

Long Beach has a clear annual cycle: average daily highs run from 18 °C in December to 28 °C in August, a swing of 9.8 °C in mean temperature across the year.

Counted across a normal year, 111 days a year reach 25 °C, 20 of them reach 30 °C, 0 nights drop below freezing. The warmest reading in the 1991–2020 record is 38 °C, in July.

Rain is strongly seasonal. February averages 73 mm against 0 mm in August — 173 times as much. Planning around the dry months matters more here than planning around temperature.

The sea off Long Beach is warmest in August at 21 °C and coldest in February at 15 °C. Sea temperature lags the air by a month or two, which is why late summer swims warmer than early summer at the same air temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	18.2 °C	68 mm	47 %
February	18.2 °C	73 mm	47 %
March	19.3 °C	44 mm	46 %
April	21.0 °C	17 mm	38 %
May	22.3 °C	7 mm	40 %
June	24.2 °C	1 mm	33 %
July	26.6 °C	2 mm	28 %
August	27.7 °C	under 1 mm	23 %
September	27.1 °C	3 mm	26 %
October	24.6 °C	13 mm	31 %
November	21.3 °C	17 mm	36 %
December	18.1 °C	46 mm	43 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	18.2 °C	8.0 °C	12.5 °C	31.2 °C	-0.4 °C	1	0
February	18.2 °C	8.7 °C	13.0 °C	28.9 °C	0.8 °C	2	0
March	19.3 °C	10.3 °C	14.3 °C	30.5 °C	2.8 °C	2	0
April	21.0 °C	11.6 °C	15.9 °C	33.2 °C	3.6 °C	4	1
May	22.3 °C	13.7 °C	17.5 °C	34.6 °C	8.8 °C	6	1
June	24.2 °C	15.3 °C	19.3 °C	36.7 °C	10.6 °C	10	1
July	26.6 °C	17.3 °C	21.4 °C	38.2 °C	13.4 °C	22	2
August	27.7 °C	17.9 °C	22.2 °C	36.3 °C	13.2 °C	26	6
September	27.1 °C	17.4 °C	21.5 °C	37.3 °C	11.4 °C	21	5
October	24.6 °C	14.9 °C	19.1 °C	38.0 °C	6.6 °C	13	3
November	21.3 °C	11.0 °C	15.6 °C	33.2 °C	1.8 °C	5	0
December	18.1 °C	7.8 °C	12.4 °C	29.2 °C	-1.1 °C	0	0

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	68 mm	5	10 h/day	47 %	74 %	15 km/h	15.1 °C
February	73 mm	6	11 h/day	47 %	74 %	18 km/h	15.0 °C
March	44 mm	4	12 h/day	46 %	75 %	19 km/h	15.1 °C
April	17 mm	2	13 h/day	38 %	70 %	21 km/h	15.6 °C
May	7 mm	1	14 h/day	40 %	71 %	19 km/h	16.9 °C
June	1 mm	0	14 h/day	33 %	72 %	18 km/h	18.4 °C
July	2 mm	0	14 h/day	28 %	72 %	18 km/h	20.0 °C
August	under 1 mm	0	13 h/day	23 %	72 %	19 km/h	20.6 °C
September	3 mm	0	12 h/day	26 %	73 %	18 km/h	20.4 °C
October	13 mm	2	11 h/day	31 %	71 %	17 km/h	19.3 °C
November	17 mm	3	10 h/day	36 %	69 %	16 km/h	17.5 °C
December	46 mm	4	9.9 h/day	43 %	71 %	15 km/h	15.8 °C

Where Long Beach ranks

Ranking	Position	Value
The driest places in North America in August	6thof 50	0.4 mm
Places with the best weather in North America year-round	7thof 50	89/100
The driest places in North America in June	9thof 50	1.4 mm
The driest places in North America in October	9thof 50	13 mm
Places with the best weather in North America in June	12thof 50	93/100
Places with the best weather in North America in May	13thof 50	94/100

Planning a trip? See the best time to visit Long Beach.

QuestionsCommon questions about Long Beach’s climate

When is the best time to visit Long Beach?

That depends on what you want, so the honest answer is a comparison rather than a single month. June, July, October sit closest to 20 °C on average, August is the warmest month and August the driest. The month-by-month table above has the full picture.

How hot does Long Beach get?

In August, the warmest month, daily highs average 28 °C. About 20 days a year pass 30 °C. The highest value in the 1991–2020 record is 38 °C.

How cold does it get in winter?

Nights average 7.8 °C in December, the coldest month. A normal year has 0 nights below freezing.

Which month is wettest in Long Beach?

February, averaging 73 mm over 6 days with rain. The driest month is August with 0 mm. The year as a whole averages 291 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Long Beach rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.