Colton, California climate: NOAA's gridded normals for the city, beside the nearest station records
NOAA's gridded 1991-2020 normals put Colton's center at January lows of 42°F and July highs of 96°F, a yearly mean of 66.3°F and 11.8 inches of precipitation. No NOAA station keeps a record under the city's name. The nearest station record, Redlands (8 miles E, 1,410 ft), has January lows of 41°F and July highs of 95°F.
53,528 people (Census Bureau 2024). Distances and directions are from the city's center.
- Jan 68° 42°
- Feb 69° 44°
- Mar 72° 46°
- Apr 77° 49°
- May 81° 54°
- Jun 89° 59°
- Jul 96° 63°
- Aug 97° 64°
- Sep 93° 61°
- Oct 84° 54°
- Nov 75° 46°
- Dec 67° 41°
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 Colton's center.
What is each month like in Colton?
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. | Redlands high | Redlands low |
|---|---|---|---|---|---|---|
| January | 68°F | 42°F | 55.2°F | 2.64 | 67°F | 41°F |
| February | 69°F | 44°F | 56.3°F | 3.18 | 67°F | 42°F |
| March | 72°F | 46°F | 59.3°F | 1.76 | 71°F | 45°F |
| April | 77°F | 49°F | 63.2°F | 0.75 | 76°F | 48°F |
| May | 81°F | 54°F | 67.7°F | 0.25 | 80°F | 52°F |
| June | 89°F | 59°F | 73.9°F | 0.05 | 89°F | 56°F |
| July | 96°F | 63°F | 79.4°F | 0.06 | 95°F | 63°F |
| August | 97°F | 64°F | 80.4°F | 0.05 | 96°F | 63°F |
| September | 93°F | 61°F | 76.7°F | 0.13 | 92°F | 60°F |
| October | 84°F | 54°F | 69.1°F | 0.43 | 83°F | 53°F |
| November | 75°F | 46°F | 60.5°F | 0.71 | 75°F | 45°F |
| December | 67°F | 41°F | 54.2°F | 1.79 | 67°F | 40°F |
In metric: a yearly mean of 19.1°C, January lows of 6°C, July highs of 35°C and 300 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 Colton 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 |
|---|---|---|---|---|---|---|---|---|
| Redlands | 8 mi E | 1,410 ft | 65.2°F | 41°F | 95°F | 12.9 | 0 | January 27 |
| RiversideRiverside Municipal Airport | 10 mi SW | 805 ft | 66.2°F | 44°F | 93°F | 9.4 | – | January 9 |
| Lake Arrowhead | 15 mi NE | 5,205 ft | 51.1°F | 29°F | 81°F | 37.7 | 22 | May 5 |
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 Colton?
NOAA's grid gives no snow, frost dates or records, so these come from the nearest station record, Redlands (8 miles E, 1,410 ft). It gets 0 inches of snow in a normal year. The last spring frost (32°F) comes after January 27 in half of years and the first autumn frost before December 19. Its record high is 118°F (2006) and its record low 18°F (1913) (kept since 1898).
The USDA's 2023 Plant Hardiness Zone Map puts Colton in zone 10a (ZIP code 92324).
Over a year 92% of the sunlight that would reach the ground under clear skies gets through the clouds in the area (5.8 kWh per square metre a day, NASA POWER 2001-2020); August is the sunniest month (96%) and December the cloudiest (85%).
Redlands'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 Colton; the nearest record's month pages have them.
Source: NOAA NCEI 1991-2020 normals, station USC00047306; 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 Colton, ZIP code by ZIP code?
One ZIP code area lies wholly or partly in Colton. 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.