Corona, California climate: NOAA's gridded normals for the city, beside the nearest station records
NOAA's gridded 1991-2020 normals put Corona's center at January lows of 44°F and July highs of 91°F, a yearly mean of 65.3°F and 12.5 inches of precipitation. No NOAA station keeps a record under the city's name. The nearest station record, Chino (9 miles NW, 650 ft), has January lows of 42°F and July highs of 94°F.
161,540 people (Census Bureau 2024). Distances and directions are from the city's center.
- Jan 68° 44°
- Feb 68° 45°
- Mar 71° 47°
- Apr 75° 49°
- May 78° 53°
- Jun 85° 57°
- Jul 91° 62°
- Aug 93° 63°
- Sep 90° 60°
- Oct 82° 55°
- Nov 75° 48°
- Dec 68° 43°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
The months above are NOAA's gridded normals at Corona's center.
What is each month like in Corona?
NOAA's grid estimates the normals every 5 km or so from the stations around each point, terrain included. It smooths between stations, so night lows at the heart of a large city can run warmer than the grid shows: at five big-city airports we compared, the grid's highs were within about 1°F of the station and its lows 1-6°F cooler. The nearest record's high and low are beside each month.
| Month | High | Low | Mean | Precip. | Chino high | Chino low |
|---|---|---|---|---|---|---|
| January | 68°F | 44°F | 56.1°F | 2.63 | 70°F | 42°F |
| February | 68°F | 45°F | 56.4°F | 3.41 | 70°F | 43°F |
| March | 71°F | 47°F | 58.8°F | 1.74 | 73°F | 46°F |
| April | 75°F | 49°F | 61.8°F | 0.76 | 77°F | 49°F |
| May | 78°F | 53°F | 65.7°F | 0.20 | 81°F | 54°F |
| June | 85°F | 57°F | 70.8°F | 0.03 | 88°F | 59°F |
| July | 91°F | 62°F | 76.4°F | 0.06 | 94°F | 63°F |
| August | 93°F | 63°F | 77.8°F | 0.05 | 96°F | 63°F |
| September | 90°F | 60°F | 75.2°F | 0.14 | 93°F | 60°F |
| October | 82°F | 55°F | 68.4°F | 0.54 | 85°F | 53°F |
| November | 75°F | 48°F | 61.2°F | 1.08 | 76°F | 45°F |
| December | 68°F | 43°F | 55.2°F | 1.88 | 69°F | 40°F |
In metric: a yearly mean of 18.5°C, January lows of 7°C, July highs of 33°C and 318 mm of precipitation a year.
Source: NOAA NCEI U.S. Monthly Gridded Climate Normals 1991-2020 (nClimGrid, accession 0245564); NOAA NCEI 1991-2020 station normals. The grid cell holding the city's Census center point.
What do the station records around Corona say?
Each row is a NOAA station's own 1991-2020 normals, with the snow and frost dates the grid does not give. A record downhill or nearer the coast than the city can run warmer, one uphill cooler: compare the elevations.
| Record | Where | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| ChinoChino Airport | 9 mi NW | 650 ft | 66.1°F | 42°F | 94°F | 10.0 | – | January 17 |
| RiversideRiverside Municipal Airport | 10 mi NE | 805 ft | 66.2°F | 44°F | 93°F | 9.4 | – | January 9 |
| IrvineIrvine Ranch | 13 mi SW | 540 ft | 66.7°F | 49°F | 88°F | 13.1 | – | – |
Source: NOAA NCEI 1991-2020 U.S. Climate Normals; place center and population: Census Bureau 2024. Last frost: the median last spring date of 32°F.
How much snow, how late a frost, what zone and how much sun in Corona?
NOAA's grid gives no snow, frost dates or records, so these come from the nearest station record, Chino (9 miles NW, 650 ft). NOAA publishes no snowfall normal for it; the nearest record that has one, Riverside Fire Station 3 (12 miles away), gets 0 inches a year. The last spring frost (32°F) comes after January 17 in half of years and the first autumn frost before December 19. Its record high is 121°F (2020) and its record low 20°F (2007) (kept since 1998).
The USDA's 2023 Plant Hardiness Zone Map puts Corona in zone 10a across its 4 ZIP code areas.
Over a year 87% of the sunlight that would reach the ground under clear skies gets through the clouds in the area (5.4 kWh per square metre a day, NASA POWER 2001-2020); August is the sunniest month (92%) and February the cloudiest (83%).
Chino's page has its months, frost probabilities, records by month and recent years. NOAA's grid has monthly figures only, so there are no day-by-day month pages for Corona; the nearest record's month pages have them.
Source: NOAA NCEI 1991-2020 normals, station USW00003179; records: ACIS; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; sunshine: NASA POWER.
How does the climate vary across Corona, ZIP code by ZIP code?
4 ZIP code areas lie wholly or partly in Corona. On NOAA's grid 92880 is the warmest (65.7°F a year) and 92881 the coolest (65.1°F), a spread of 0.6°F. Each row also names the nearest station record and its frost dates.
| ZIP code | Zone | Year | Jan low | Jul high | Precip. | Nearest record | Last frost | First frost |
|---|---|---|---|---|---|---|---|---|
| 92879 | 10a | 65.5°F | 43°F | 92°F | 11.3 | Riverside (7 mi) | January 9 | December 30 |
| 92880 | 10a | 65.7°F | 43°F | 92°F | 12.1 | Chino (4 mi) | January 17 | December 19 |
| 92881 | 10a | 65.1°F | 46°F | 90°F | 13.4 | Chino (11 mi) | January 17 | December 19 |
| 92882 | 10a | 65.5°F | 45°F | 91°F | 13.2 | Chino (8 mi) | January 17 | December 19 |
Source: Census Bureau 2020 ZCTA-to-place relationship file and ZCTA centers; NOAA NCEI gridded and station normals, 1991-2020. A ZIP area counts when at least a tenth of its land (and 0.5 km²) is in the city; its figures are the grid cell at its center; frost dates are the nearest record's medians of 32°F.