Spring Valley climate

Name: Spring Valley
Address: US

Spring Valley is warmest in July, with average highs of 39 °C, and coldest in December, when nights average 3.1 °C. February is the wettest month (28 mm) and June the driest (1.5 mm). Figures are 1991–2020 climate normals.

Across a full year Spring Valley averages 143 mm of rain, 195 days above 25 °C and 15 days below freezing.

United States · 721 m elevation · population 178,395 · 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 39 °C
Coldest month December 3.1 °C
Driest month June 1 mm
Wettest month February 28 mm
Least cloud September 15 % cloud
Hottest on record June 46 °C
Coldest on record December -8.3 °C

What to expectSpring Valley through the year

Spring Valley has a clear annual cycle: average daily highs run from 13 °C in December to 39 °C in July, a swing of 25 °C in mean temperature across the year.

Counted across a normal year, 195 days a year reach 25 °C, 147 of them reach 30 °C, 15 nights drop below freezing. The warmest reading in the 1991–2020 record is 46 °C, in June.

Rain is spread fairly evenly through the year, from 1 mm in June to 28 mm in February. There is no dry season to aim for.

Month by month

Month	Avg high	Rainfall	Cloud
January	13.8 °C	21 mm	41 %
February	16.3 °C	28 mm	41 %
March	21.0 °C	17 mm	37 %
April	25.5 °C	7 mm	31 %
May	30.6 °C	4 mm	27 %
June	36.3 °C	1 mm	16 %
July	38.9 °C	7 mm	22 %
August	37.9 °C	11 mm	20 %
September	33.8 °C	8 mm	15 %
October	26.6 °C	8 mm	22 %
November	18.7 °C	10 mm	28 %
December	12.9 °C	19 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	13.8 °C	3.4 °C	8.1 °C	22.3 °C	-7.3 °C	0	0	5
February	16.3 °C	4.8 °C	10.1 °C	25.6 °C	-5.7 °C	0	0	3
March	21.0 °C	7.9 °C	14.2 °C	32.4 °C	-1.8 °C	6	1	0
April	25.5 °C	11.3 °C	18.5 °C	37.7 °C	0.7 °C	17	5	0
May	30.6 °C	16.0 °C	23.7 °C	42.0 °C	4.9 °C	27	18	0
June	36.3 °C	21.0 °C	29.4 °C	45.6 °C	9.4 °C	30	28	0
July	38.9 °C	25.1 °C	32.7 °C	45.0 °C	16.5 °C	31	31	0
August	37.9 °C	24.5 °C	31.7 °C	44.2 °C	14.7 °C	31	31	0
September	33.8 °C	20.3 °C	27.3 °C	44.1 °C	10.1 °C	29	26	0
October	26.6 °C	13.8 °C	20.0 °C	36.8 °C	-2.1 °C	21	7	0
November	18.7 °C	7.6 °C	12.7 °C	29.9 °C	-4.0 °C	2	0	1
December	12.9 °C	3.1 °C	7.5 °C	22.8 °C	-8.3 °C	0	0	6

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	21 mm	4	10.0 h/day	41 %	46 %	13 km/h
February	28 mm	4	11 h/day	41 %	44 %	15 km/h
March	17 mm	3	12 h/day	37 %	36 %	17 km/h
April	7 mm	2	13 h/day	31 %	25 %	20 km/h
May	4 mm	1	14 h/day	27 %	21 %	19 km/h
June	1 mm	0	15 h/day	16 %	16 %	19 km/h
July	7 mm	2	14 h/day	22 %	20 %	16 km/h
August	11 mm	2	14 h/day	20 %	23 %	16 km/h
September	8 mm	1	12 h/day	15 %	24 %	16 km/h
October	8 mm	1	11 h/day	22 %	28 %	14 km/h
November	10 mm	1	10 h/day	28 %	35 %	13 km/h
December	19 mm	3	9.7 h/day	38 %	45 %	12 km/h

How Spring Valley 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
Spring Valley	39 °C	3.1 °C	143 mm	195
Las Vegas · United States	39 °C	3.6 °C	142 mm	201
Henderson · United States	40 °C	5.1 °C	133 mm	206
San Bernardino · United States	34 °C	5.0 °C	392 mm	186
Fontana · United States	34 °C	4.8 °C	464 mm	180
Moreno Valley · United States	33 °C	4.6 °C	391 mm	174
Lancaster · United States	35 °C	4.1 °C	193 mm	176

Where Spring Valley ranks

Ranking	Position	Value
The driest places in North America in October	5th of 50	8.4 mm
The driest places in North America year-round	5th of 50	12 mm
The warmest places in North America in August	7th of 50	38 °C
The warmest places in North America in July	7th of 50	39 °C
The driest places in North America in November	8th of 50	9.7 mm
The driest places in North America in June	10th of 50	1.5 mm

Planning a trip? See the best time to visit Spring Valley.

QuestionsCommon questions about Spring Valley’s climate

When is the best time to visit Spring Valley?

That depends on what you want, so the honest answer is a comparison rather than a single month. April, May, 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 Spring Valley get?

In July, the warmest month, daily highs average 39 °C. About 147 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 3.1 °C in December, the coldest month. A normal year has 15 nights below freezing.

Which month is wettest in Spring Valley?

February, averaging 28 mm over 4 days with rain. The driest month is June with 1 mm. The year as a whole averages 143 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 Spring Valley 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
Data point: 36.108°, -115.245° , 721 m above sea level (the coordinates the reanalysis values are taken for)
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.