Moreno Valley climate

Name: Moreno Valley
Address: US

Moreno Valley is warmest in August, with average highs of 33 °C, and coldest in December, when nights average 4.6 °C. February is the wettest month (90 mm) and June the driest (3.4 mm). Figures are 1991–2020 climate normals.

Across a full year Moreno Valley averages 391 mm of rain, 174 days above 25 °C and 7 days below freezing.

United States · 497 m elevation · population 204,198 · 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 33 °C
Coldest month December 4.6 °C
Driest month June 3 mm
Wettest month February 90 mm
Least cloud August 14 % cloud
Hottest on record July 45 °C
Coldest on record January -4.5 °C

What to expectMoreno Valley through the year

Moreno Valley has a clear annual cycle: average daily highs run from 17 °C in December to 33 °C in August, a swing of 16 °C in mean temperature across the year.

Counted across a normal year, 174 days a year reach 25 °C, 100 of them reach 30 °C, 7 nights drop below freezing. The warmest reading in the 1991–2020 record is 45 °C, in July.

Rain is strongly seasonal. February averages 90 mm against 3 mm in June — 26 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	17.1 °C	74 mm	46 %
February	17.5 °C	90 mm	48 %
March	19.5 °C	56 mm	46 %
April	22.1 °C	28 mm	38 %
May	25.0 °C	14 mm	33 %
June	29.2 °C	3 mm	18 %
July	32.3 °C	11 mm	18 %
August	33.2 °C	8 mm	14 %
September	31.3 °C	7 mm	16 %
October	26.4 °C	19 mm	25 %
November	21.2 °C	26 mm	34 %
December	16.8 °C	56 mm	42 %

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	17.1 °C	4.7 °C	10.0 °C	28.2 °C	-4.5 °C	1	0	2
February	17.5 °C	5.4 °C	10.7 °C	28.8 °C	-2.4 °C	3	0	1
March	19.5 °C	7.2 °C	12.7 °C	31.8 °C	-1.0 °C	4	0	0
April	22.1 °C	9.2 °C	15.0 °C	33.8 °C	0.0 °C	9	2	0
May	25.0 °C	12.4 °C	18.0 °C	36.4 °C	4.4 °C	16	5	0
June	29.2 °C	15.8 °C	21.8 °C	42.4 °C	6.9 °C	25	13	0
July	32.3 °C	19.3 °C	25.2 °C	44.6 °C	12.6 °C	31	24	0
August	33.2 °C	19.8 °C	25.9 °C	42.6 °C	12.9 °C	31	27	0
September	31.3 °C	17.3 °C	23.7 °C	44.5 °C	8.1 °C	28	20	0
October	26.4 °C	12.6 °C	18.9 °C	39.0 °C	2.2 °C	19	8	0
November	21.2 °C	7.9 °C	13.8 °C	32.5 °C	-2.3 °C	7	1	1
December	16.8 °C	4.6 °C	9.8 °C	27.2 °C	-3.8 °C	0	0	3

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	74 mm	6	10 h/day	46 %	63 %	10 km/h
February	90 mm	7	11 h/day	48 %	65 %	11 km/h
March	56 mm	6	12 h/day	46 %	67 %	12 km/h
April	28 mm	4	13 h/day	38 %	62 %	13 km/h
May	14 mm	3	14 h/day	33 %	61 %	13 km/h
June	3 mm	1	14 h/day	18 %	55 %	13 km/h
July	11 mm	2	14 h/day	18 %	52 %	13 km/h
August	8 mm	2	13 h/day	14 %	49 %	13 km/h
September	7 mm	2	12 h/day	16 %	51 %	12 km/h
October	19 mm	3	11 h/day	25 %	52 %	11 km/h
November	26 mm	3	10 h/day	34 %	54 %	11 km/h
December	56 mm	5	9.9 h/day	42 %	60 %	11 km/h

How Moreno 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
Moreno Valley	33 °C	4.6 °C	391 mm	174
Riverside · United States	34 °C	5.0 °C	439 mm	189
San Bernardino · United States	34 °C	5.0 °C	392 mm	186
Fontana · United States	34 °C	4.8 °C	464 mm	180
Corona · United States	33 °C	6.1 °C	438 mm	189
Ontario · United States	33 °C	6.4 °C	418 mm	181
Pomona · United States	32 °C	6.4 °C	411 mm	176

Where Moreno Valley ranks

Ranking	Position	Value
Places with the best weather in North America in April	9th of 50	95/100
Places with the best weather in North America in May	9th of 50	95/100
The driest places in North America in October	26th of 50	19 mm
The driest places in North America in June	27th of 50	3.4 mm
The driest places in North America year-round	32nd of 50	33 mm
The driest places in North America in September	34th of 50	7.2 mm

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

QuestionsCommon questions about Moreno Valley’s climate

When is the best time to visit Moreno Valley?

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

How hot does Moreno Valley get?

In August, the warmest month, daily highs average 33 °C. About 100 days a year pass 30 °C. The highest value in the 1991–2020 record is 45 °C.

How cold does it get in winter?

Nights average 4.6 °C in December, the coldest month. A normal year has 7 nights below freezing.

Which month is wettest in Moreno Valley?

February, averaging 90 mm over 7 days with rain. The driest month is June with 3 mm. The year as a whole averages 391 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 Moreno 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: 33.938°, -117.231° , 497 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.