Corona climate

Name: Corona
Address: US

Corona is warmest in August, with average highs of 33 °C, and coldest in December, when nights average 6.1 °C. February is the wettest month (107 mm) and August the driest (0.9 mm). Figures are 1991–2020 climate normals.

Across a full year Corona averages 438 mm of rain, 189 days above 25 °C and 2 days below freezing.

United States · 207 m elevation · population 164,226 · 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 6.1 °C
Driest month August 1 mm
Wettest month February 107 mm
Least cloud August 13 % cloud
Hottest on record September 46 °C
Coldest on record January -2.7 °C

What to expectCorona through the year

Corona has a clear annual cycle: average daily highs run from 19 °C in December to 33 °C in August, a swing of 14 °C in mean temperature across the year.

Counted across a normal year, 189 days a year reach 25 °C, 105 of them reach 30 °C, 2 nights drop below freezing. The warmest reading in the 1991–2020 record is 46 °C, in September.

Rain is strongly seasonal. February averages 107 mm against 1 mm in August — 115 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	18.9 °C	93 mm	49 %
February	19.3 °C	107 mm	51 %
March	21.0 °C	64 mm	50 %
April	23.4 °C	30 mm	42 %
May	25.7 °C	14 mm	37 %
June	29.1 °C	3 mm	21 %
July	32.2 °C	2 mm	18 %
August	33.4 °C	1 mm	13 %
September	32.0 °C	5 mm	17 %
October	27.6 °C	22 mm	27 %
November	22.8 °C	29 mm	36 %
December	18.5 °C	67 mm	44 %

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	18.9 °C	6.2 °C	11.6 °C	30.8 °C	-2.7 °C	2	0	1
February	19.3 °C	7.0 °C	12.3 °C	31.4 °C	-1.3 °C	4	0	0
March	21.0 °C	8.8 °C	14.1 °C	33.2 °C	1.2 °C	6	1	0
April	23.4 °C	10.5 °C	16.2 °C	36.6 °C	0.5 °C	11	3	0
May	25.7 °C	13.2 °C	18.6 °C	39.1 °C	6.2 °C	17	6	0
June	29.1 °C	15.6 °C	21.6 °C	42.7 °C	8.4 °C	26	12	0
July	32.2 °C	18.4 °C	24.6 °C	45.5 °C	13.0 °C	31	23	0
August	33.4 °C	19.2 °C	25.4 °C	44.1 °C	13.7 °C	31	27	0
September	32.0 °C	17.8 °C	24.0 °C	46.1 °C	10.4 °C	28	21	0
October	27.6 °C	14.0 °C	19.9 °C	41.1 °C	5.1 °C	21	10	0
November	22.8 °C	9.4 °C	15.3 °C	34.9 °C	-0.1 °C	10	2	0
December	18.5 °C	6.1 °C	11.4 °C	29.3 °C	-2.1 °C	2	0	1

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	93 mm	7	10 h/day	49 %	69 %	9.3 km/h
February	107 mm	7	11 h/day	51 %	70 %	10 km/h
March	64 mm	7	12 h/day	50 %	72 %	11 km/h
April	30 mm	5	13 h/day	42 %	66 %	12 km/h
May	14 mm	3	14 h/day	37 %	66 %	12 km/h
June	3 mm	0	14 h/day	21 %	63 %	12 km/h
July	2 mm	1	14 h/day	18 %	61 %	11 km/h
August	1 mm	0	13 h/day	13 %	60 %	11 km/h
September	5 mm	1	12 h/day	17 %	61 %	11 km/h
October	22 mm	3	11 h/day	27 %	61 %	10 km/h
November	29 mm	4	10 h/day	36 %	61 %	9.5 km/h
December	67 mm	6	9.9 h/day	44 %	66 %	9.4 km/h

How Corona 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
Corona	33 °C	6.1 °C	438 mm	189
Riverside · United States	34 °C	5.0 °C	439 mm	189
Ontario · United States	33 °C	6.4 °C	418 mm	181
Pomona · United States	32 °C	6.4 °C	411 mm	176
Fontana · United States	34 °C	4.8 °C	464 mm	180
Santa Ana · United States	27 °C	8.4 °C	355 mm	100
Moreno Valley · United States	33 °C	4.6 °C	391 mm	174

Where Corona ranks

Ranking	Position	Value
Places with the best weather in North America in April	8thof 50	95/100
The warmest places in North America in September	31stof 50	32 °C
The warmest places in North America in August	45thof 50	33 °C

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

QuestionsCommon questions about Corona’s climate

When is the best time to visit Corona?

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 August the driest. The month-by-month table above has the full picture.

How hot does Corona get?

In August, the warmest month, daily highs average 33 °C. About 105 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 6.1 °C in December, the coldest month. A normal year has 2 nights below freezing.

Which month is wettest in Corona?

February, averaging 107 mm over 7 days with rain. The driest month is August with 1 mm. The year as a whole averages 438 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 Corona 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.