Chino, California climate: Normal weather by month, frost dates and records
Chino's normal year runs from 40°F December nights to 96°F August afternoons, with 10.0 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 18.9°C, December lows of 5°C, August highs of 36°C, 253 mm of precipitation a year.
- NOAA stationChino Airport
- Station IDUSW00003179
- Location33.98°N 117.64°W
- Elevation650 ft (198 m)
- Population94,010
On October 24, the normal high in Chino is 83°F and the normal low 51°F, and the chance of measurable rain or snow is 11%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Chino.
- Jan 70° 42°
- Feb 70° 43°
- Mar 73° 46°
- Apr 77° 49°
- May 81° 54°
- Jun 88° 59°
- Jul 94° 63°
- Aug 96° 63°
- Sep 93° 60°
- Oct 85° 53°
- Nov 76° 45°
- Dec 69° 40°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Chino each month?
August is the warmest month, with normal highs of 96°F; December the coldest, with normal lows of 40°F. The most precipitation falls in February (2.68 in), the least in August (0.01 in).
Each month has its own page with the day-by-day normals, the month's records and its recent years:
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 70°F | 42°F | 55.6°F | 2.17 | 5 | <1 | 3 | 10 h 10 min |
| February | 70°F | 43°F | 56.4°F | 2.68 | 6 | <1 | 2 | 11 h |
| March | 73°F | 46°F | 59.1°F | 1.43 | 5 | 1 | <1 | 11 h 50 min |
| April | 77°F | 49°F | 62.8°F | 0.55 | 4 | 3 | <1 | 13 h |
| May | 81°F | 54°F | 67.7°F | 0.17 | 1 | 5 | <1 | 13 h 50 min |
| June | 88°F | 59°F | 73.0°F | 0.02 | <1 | 11 | <1 | 14 h 20 min |
| July | 94°F | 63°F | 78.3°F | 0.08 | <1 | 23 | <1 | 14 h 10 min |
| August | 96°F | 63°F | 79.8°F | 0.01 | <1 | 25 | <1 | 13 h 30 min |
| September | 93°F | 60°F | 76.5°F | 0.06 | 1 | 19 | <1 | 12 h 30 min |
| October | 85°F | 53°F | 68.9°F | 0.53 | 3 | 9 | <1 | 11 h 20 min |
| November | 76°F | 45°F | 60.7°F | 0.59 | 4 | 3 | 1 | 10 h 30 min |
| December | 69°F | 40°F | 54.6°F | 1.69 | 5 | <1 | 5 | 9 h 50 min |
| Year (annual) | 81°F | 51°F | 66.1°F | 9.98 | 35 | 99 | 11 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 21°C | 5°C | 13.1°C | 55 mm |
| February | 21°C | 6°C | 13.6°C | 68 mm |
| March | 23°C | 8°C | 15.1°C | 36 mm |
| April | 25°C | 9°C | 17.1°C | 14 mm |
| May | 27°C | 12°C | 19.8°C | 4 mm |
| June | 31°C | 15°C | 22.8°C | 1 mm |
| July | 34°C | 17°C | 25.7°C | 2 mm |
| August | 36°C | 17°C | 26.6°C | 0 mm |
| September | 34°C | 16°C | 24.7°C | 2 mm |
| October | 29°C | 12°C | 20.5°C | 13 mm |
| November | 25°C | 7°C | 15.9°C | 15 mm |
| December | 20°C | 5°C | 12.6°C | 43 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00003179; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Chino?
Normal highs sit between 65°F and 85°F in January, February, March, April, May, October, November and December. Of those, May has the fewest days with rain (1).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USW00003179.
When is the last frost in Chino?
In Chino, the last spring frost (32°F) comes after January 17 in half of years and after February 22 in one year in ten; the first autumn frost comes before December 19 in half of years and before November 27 in one year in ten. A night at 32°F or colder comes at all in 85% of years here (NOAA).
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- January 171 year in 10 after February 22; 9 in 10 after December 18
- First autumn frost, half of years before
- December 191 year in 10 before November 27; 9 in 10 before January 17
NOAA puts the median frost-free season at 335 days, and the season without a hard freeze (28°F) at 365 days.
A hard freeze (28°F) comes after January 3 in half of springs and before December 30 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Chino in zones 9b to 10a across its 2 ZIP code areas (10a in 91710, the largest). By the map's own method, the average of each year's coldest night over 1991-2020, Chino's NOAA station is in zone 9b: the coldest night of a typical year reaches 28°F (20 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.
Frost dates for every NOAA station in California · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USW00003179; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
What hardiness zone is each Chino ZIP code in?
The USDA's 2023 map gives each ZIP code area one zone. Chino's 2 ZIP code areas run from zone 9b to 10a: 1 in 10a and 1 in 9b. Each ZIP's frost dates are in the frost tool.
Source: USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; ZIP areas in the place: Census Bureau 2020 ZCTA-to-place relationship file. A ZIP area counts when at least a tenth of its land (and 0.5 km²) lies in the place.
How hot and how cold does it get in Chino?
In a normal year in Chino, 99 days a year reach 90°F (23 of them 100°F or more), 11 nights fall to 32°F or colder and 35 days bring measurable precipitation.
- Days at 90°F or more
- 99a normal year
- Days at 100°F or more
- 23a normal year
- Nights at 32°F or colder
- 11a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 35a normal year
The highest temperature in this station's record (since 1998) is 121°F, on September 6, 2020; the lowest is 20°F, on January 14, 2007.
The wettest calendar year on that record is 2023, with 21.60 in.
Source: NOAA NCEI 1991-2020 annual normals, station USW00003179; records: ACIS (NOAA Regional Climate Centers), station USW00003179. Records use complete months only; a month missing more than three days is left out.
How sunny is Chino?
Over a year 87% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Chino, 5.4 kWh per square metre a day. August is the sunniest month (92%) and February the cloudiest (83%). Among the 459 U.S. places of 50,000 or more, that ranks tied 58th (with 22 others) in sunshine.
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 85% | 3.3 |
| February | 83% | 4.1 |
| March | 85% | 5.4 |
| April | 86% | 6.5 |
| May | 83% | 6.9 |
| June | 85% | 7.3 |
| July | 89% | 7.4 |
| August | 92% | 7.0 |
| September | 91% | 6.0 |
| October | 88% | 4.6 |
| November | 87% | 3.6 |
| December | 83% | 2.9 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Chino need?
A normal year in Chino brings 1,387 heating degree days, 74% fewer than the median U.S. place (5,373), and 1,817 cooling degree days, 2.0 times the median (908). One month needs 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 5,949 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 295 | 4 |
| February | 247 | 5 |
| March | 195 | 14 |
| April | 107 | 43 |
| May | 30 | 114 |
| June | 2 | 244 |
| July | 0 | 412 |
| August | 0 | 457 |
| September | 1 | 348 |
| October | 28 | 149 |
| November | 157 | 28 |
| December | 325 | 1 |
| Year (annual) | 1,387 | 1,817 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00003179. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Has Chino been warmer than normal lately?
2024 averaged 65.2°F, 0.9°F below the 1991-2020 normal of 66.1°F. 2 of the 4 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 66.7°F | +0.6°F | 7.12 |
| 2022 | 67.6°F | +1.5°F | 5.43 |
| 2023 | 64.2°F | −1.9°F | 21.60 |
| 2024 | 65.2°F | −0.9°F | 17.02 |
Source: observed years: ACIS, station USW00003179. A year counts only with all twelve months complete.
How does Chino's climate compare?
Chino is warmer than 199 of the other 218 places with their own NOAA record in California, and wetter than 42. Across the 7,247 U.S. stations with normals, its annual mean of 66.1°F is warmer than 90%.
In the Köppen classification computed from these normals, Chino is BSh: hot semi-arid steppe. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Chino share this climate record?
5 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Corona, CAalso near: Riverside (10 mi, 66.2°F a year); Irvine (13 mi, 66.7°F a year)161,540 people · 9 mi SE
- Chino Hills, CAalso near: Anaheim (9 mi, 67.7°F a year); Pomona (10 mi, 65.0°F a year)77,418 people · 6 mi SW
- Eastvale, CAalso near: Ontario (7 mi, 66.8°F a year); Riverside (8 mi, 66.2°F a year)70,751 people · 3 mi E
- Norco, CA25,400 people · 6 mi SE
- Coronita, CA2,782 people · 7 mi S
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Chino's climate
What is the coldest month in Chino?
December, with a normal high of 69°F and a normal low of 40°F. The warmest is August (96°F by day, 63°F at night).
What is the rainiest month in Chino?
February, with 2.68 in of precipitation in a normal year; the driest is August with 0.01 in.
What plant hardiness zone is Chino in?
The USDA's 2023 map puts Chino in zones 9b to 10a across its 2 ZIP code areas (10a in 91710, the largest). By the same method at Chino's NOAA station, the coldest night of a typical year reaches 28°F (20 years, 1991-2020): zone 9b.
How late can frost come in Chino?
In half of years the last 32°F night comes after January 17; in one year in ten it comes after February 22. Waiting until February 22 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Chino in OctoberThis month day by day, its records and recent years
- California climateThe statewide normals and every place in the state
- Ontario, CA6 miles from this station, 66.8°F a year
- Pomona, CA11 miles from this station, 65.0°F a year
- Riverside, CA11 miles from this station, 66.2°F a year
- Anaheim, CA14 miles from this station, 67.7°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made