Henderson climate

Name: Henderson
Address: US

Henderson is warmest in July, with average highs of 40 °C, and coldest in December, when nights average 5.1 °C. February is the wettest month (25 mm) and June the driest (1.3 mm). Figures are 1991–2020 climate normals.

Across a full year Henderson averages 133 mm of rain, 206 days above 25 °C and 4 days below freezing.

United States · 569 m elevation · population 285,667 · 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 July 40 °C
Coldest month December 5.1 °C
Driest month June 1 mm
Wettest month February 25 mm
Least cloud June 15 % cloud
Hottest on record July 46 °C
Coldest on record January -5.8 °C

What to expectHenderson through the year

Henderson has a clear annual cycle: average daily highs run from 14 °C in December to 40 °C in July, a swing of 25 °C in mean temperature across the year.

Counted across a normal year, 206 days a year reach 25 °C, 157 of them reach 30 °C, 4 nights drop below freezing. The warmest reading in the 1991–2020 record is 46 °C, in July.

Rain is spread fairly evenly through the year, from 1 mm in June to 25 mm in February. There is no dry season to aim for.

Month by month

Month	Avg high	Rainfall	Cloud
January	15.1 °C	20 mm	40 %
February	17.5 °C	25 mm	41 %
March	22.1 °C	16 mm	37 %
April	26.6 °C	5 mm	30 %
May	31.7 °C	3 mm	26 %
June	37.4 °C	1 mm	15 %
July	39.9 °C	8 mm	23 %
August	38.9 °C	10 mm	21 %
September	34.8 °C	7 mm	15 %
October	27.7 °C	8 mm	21 %
November	19.9 °C	11 mm	28 %
December	14.3 °C	18 mm	38 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C	Days below 0 °C
January	15.1 °C	5.4 °C	9.6 °C	23.5 °C	-5.8 °C	0	0	1
February	17.5 °C	6.5 °C	11.4 °C	27.6 °C	-3.8 °C	1	0	1
March	22.1 °C	9.5 °C	15.5 °C	32.9 °C	-0.4 °C	9	1	0
April	26.6 °C	12.9 °C	19.6 °C	36.9 °C	2.6 °C	20	7	0
May	31.7 °C	17.7 °C	24.9 °C	41.9 °C	6.7 °C	28	21	0
June	37.4 °C	22.8 °C	30.7 °C	45.8 °C	9.5 °C	30	29	0
July	39.9 °C	26.7 °C	33.8 °C	45.9 °C	18.4 °C	31	31	0
August	38.9 °C	26.0 °C	32.8 °C	44.4 °C	17.0 °C	31	31	0
September	34.8 °C	21.9 °C	28.5 °C	44.3 °C	10.4 °C	30	27	0
October	27.7 °C	15.4 °C	21.3 °C	37.2 °C	-0.2 °C	23	10	0
November	19.9 °C	9.4 °C	14.1 °C	30.2 °C	-1.4 °C	4	0	0
December	14.3 °C	5.1 °C	9.1 °C	23.9 °C	-5.4 °C	0	0	1

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	20 mm	3	10.0 h/day	40 %	46 %	12 km/h
February	25 mm	4	11 h/day	41 %	43 %	14 km/h
March	16 mm	3	12 h/day	37 %	34 %	16 km/h
April	5 mm	1	13 h/day	30 %	24 %	18 km/h
May	3 mm	1	14 h/day	26 %	20 %	18 km/h
June	1 mm	0	15 h/day	15 %	15 %	18 km/h
July	8 mm	2	14 h/day	23 %	21 %	16 km/h
August	10 mm	2	14 h/day	21 %	24 %	16 km/h
September	7 mm	1	12 h/day	15 %	24 %	15 km/h
October	8 mm	2	11 h/day	21 %	28 %	14 km/h
November	11 mm	1	10 h/day	28 %	36 %	12 km/h
December	18 mm	3	9.7 h/day	38 %	45 %	12 km/h

How Henderson compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
Henderson	40 °C	5.1 °C	133 mm	206
Las Vegas · United States	39 °C	3.6 °C	142 mm	201
Spring Valley · United States	39 °C	3.1 °C	143 mm	195
San Bernardino · United States	34 °C	5.0 °C	392 mm	186
Moreno Valley · United States	33 °C	4.6 °C	391 mm	174
Fontana · United States	34 °C	4.8 °C	464 mm	180

Where Henderson ranks

Ranking	Position	Value
The driest places in North America year-round	3rdof 50	11 mm
Places with the best weather in North America in March	4thof 50	94/100
The driest places in North America in October	4thof 50	8.3 mm
The warmest places in North America in August	5thof 50	39 °C
The warmest places in North America in July	5thof 50	40 °C
The driest places in North America in June	7thof 50	1.3 mm

Planning a trip? See the best time to visit Henderson.

QuestionsCommon questions about Henderson’s climate

When is the best time to visit Henderson?

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

How hot does Henderson get?

In July, the warmest month, daily highs average 40 °C. About 157 days a year pass 30 °C. The highest value in the 1991–2020 record is 46 °C.

How cold does it get in winter?

Nights average 5.1 °C in December, the coldest month. A normal year has 4 nights below freezing.

Which month is wettest in Henderson?

February, averaging 25 mm over 4 days with rain. The driest month is June with 1 mm. The year as a whole averages 133 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 Henderson 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.