Hacienda Heights, California climate: NOAA's gridded normals for the city, beside the nearest station records
NOAA's gridded 1991-2020 normals put Hacienda Heights's center at January lows of 47°F and July highs of 87°F, a yearly mean of 66.0°F and 13.8 inches of precipitation. No NOAA station keeps a record under the city's name. The nearest station record, Fullerton (9 miles S, 96 ft), has January lows of 46°F and July highs of 84°F.
54,956 people (Census Bureau 2024). Distances and directions are from the city's center.
- Jan 69° 47°
- Feb 69° 48°
- Mar 71° 50°
- Apr 74° 52°
- May 76° 56°
- Jun 81° 60°
- Jul 87° 63°
- Aug 89° 64°
- Sep 87° 63°
- Oct 81° 58°
- Nov 74° 52°
- Dec 68° 46°
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 Hacienda Heights's center.
What is each month like in Hacienda Heights?
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. | Fullerton high | Fullerton low |
|---|---|---|---|---|---|---|
| January | 69°F | 47°F | 57.9°F | 3.14 | 69°F | 46°F |
| February | 69°F | 48°F | 58.1°F | 3.68 | 69°F | 48°F |
| March | 71°F | 50°F | 60.4°F | 2.11 | 71°F | 52°F |
| April | 74°F | 52°F | 63.0°F | 0.74 | 74°F | 54°F |
| May | 76°F | 56°F | 66.1°F | 0.29 | 76°F | 58°F |
| June | 81°F | 60°F | 70.3°F | 0.05 | 79°F | 63°F |
| July | 87°F | 63°F | 75.0°F | 0.02 | 84°F | 66°F |
| August | 89°F | 64°F | 76.5°F | 0.01 | 87°F | 66°F |
| September | 87°F | 63°F | 75.0°F | 0.11 | 85°F | 65°F |
| October | 81°F | 58°F | 69.4°F | 0.55 | 80°F | 58°F |
| November | 74°F | 52°F | 62.8°F | 0.82 | 74°F | 51°F |
| December | 68°F | 46°F | 57.0°F | 2.26 | 68°F | 46°F |
In metric: a yearly mean of 18.9°C, January lows of 8°C, July highs of 30°C and 351 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 Hacienda Heights 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 |
|---|---|---|---|---|---|---|---|---|
| FullertonFullerton Municipal Airport | 9 mi S | 96 ft | 66.2°F | 46°F | 84°F | 11.9 | – | – |
| San GabrielSan Gabriel Fire Dept | 10 mi NW | 363 ft | 66.0°F | 46°F | 86°F | 15.7 | 0 | January 4 |
| Anaheim | 12 mi SE | 235 ft | 67.7°F | 49°F | 87°F | 13.5 | 0 | – |
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 Hacienda Heights?
NOAA's grid gives no snow, frost dates or records, so these come from the nearest station record, Fullerton (9 miles S, 96 ft). NOAA publishes no snowfall normal for it; the nearest record that has one, San Gabriel (10 miles NW), gets 0 inches a year. Frost is rare there: NOAA gives no median frost date. Its record high is 116°F (2018) and its record low 28°F (2007) (kept since 1998).
The USDA's 2023 Plant Hardiness Zone Map puts Hacienda Heights in zone 10b (ZIP code 91745).
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%).
Fullerton'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 Hacienda Heights; the nearest record's month pages have them.
Source: NOAA NCEI 1991-2020 normals, station USW00003166; 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 Hacienda Heights, ZIP code by ZIP code?
One ZIP code area lies wholly or partly in Hacienda Heights. Each row also names the nearest station record and its frost dates.
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.