Norco weather in October

In October, Norco sees average daytime highs of 79°F and overnight lows near 56°F, with 0.9 in of rain across 3.1 wet days and about 11.1 hours of daylight. It is the 5th-warmest and 7th-wettest month of the year here.

Highs ease over the month, from about 83°F in the first days to 75°F by the end. The sky is clear or mostly clear about 75% of the time in October, and the air most often feels dry.

Daylight stretches from about 11 h 42 min at the start of October to 10 h 36 min by month's end. Set against the rest of the year, October is Norco's 5th-clearest and 10th-windiest month. For the whole year in context, see Norco's year-round climate.

Daytime high
79°
5th warmest
Overnight low
56°
8th coldest
Rainfall
0.9 in
3.1 wet days
Daylight
11 h 06 min
6:01 AM – 5:09 PM
Cloud cover
24%
5th clearest
Wind
3 mph
10th windiest
Solar energy
4.79 kWh/m²
Travel score
8.3
out of 10

Norco is city in Riverside County, California, United States.

Density
725/km²
people per km²
Founded
1964

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 83°F in the first days to 75°F by the end.

A typical October day in Norco reaches about 79°F in the afternoon and slips back to 56°F overnight — a 24°F spread between the day's warmth and the night's chill. On most days the high lands between 67°F and 91°F. Set against its neighbours, October runs about 8°F cooler than September and about 10°F warmer than November.

40°60°80°100°151015202531
Avg high (°F)Avg low (°F)
18460
28459
38359
48359
58358
68258
78258
88257
98257
108157
118157
128156
138056
148056
158056
168056
177956
187955
197955
207855
217855
227854
237754
247754
257754
267653
277653
287653
297552
307552
317452

How October really feels in Norco

Once humidity and wind are folded in, October averages 0 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
0
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

October sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Norco weather by month

How October compares with the rest of the year at a glance. October is the 5th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan63° / 42°3.86.6106.2
Feb64° / 44°4.47.410.76.2
Mar67° / 47°2.76.811.76.8
Apr71° / 50°1.24.612.87.8
May76° / 55°0.62.613.78.6
Jun83° / 60°0.10.514.27.8
Jul89° / 65°0.10.5145.5
Aug91° / 67°0.00.313.34.9
Sep88° / 63°0.21.212.26.1
Oct79° / 56°0.93.111.18.3
Nov70° / 48°1.23.510.27.9
Dec62° / 42°2.65.89.86.2

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 75% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 9% of October, with mostly cloudy or overcast conditions the remaining 17%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18812
28812
38812
48911
58911
68911
78911
88812
98812
108812
118713
128713
138614
148614
158614
168416
178416
188218
198218
208020
218020
228020
237822
247822
257822
267723
277723
287723
297624
307723
317723

Chance of precipitation in October

Any precipitation

Norco gets around 0.9 in of rain over 3.1 wet days in October. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 10% and peaks near 12% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
16
26
37
47
57
67
78
88
98
108
118
129
139
149
159
169
1710
1810
1910
2011
2111
2211
2311
2412
2512
2612
2712
2812
2912
3012
3112

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

Most of October feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, October lands in the dry band about 85% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
168275
270264
372244
473234
575223
677203
778193
880182
981172
1082162
1183152
1283152
1384142
1486131
1586131
1687121
1787121
1887121
1988111
2088111
2189101
2289101
239091
249181
259280
269370
279460
289550
299550
309640
319730

Wind in October

Winds average 3 mph in October.

Across October, daily wind ranges from about 3 mph on the calmest days to 3 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
13calm
23calm
33calm
43calm
53calm
63calm
73calm
83calm
93calm
103calm
113calm
123calm
133calm
143calm
153calm
163calm
173calm
183calm
193calm
203calm
213calm
223calm
233calm
243calm
253calm
263calm
273calm
283calm
293calm
303calm
313calm

Sunrise & sunset in October

DaylightNight

Daylight runs from about 11 h 42 min at the start of October to 10 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 66 minutes over October. Sunrise moves from 5:49 AM to 6:14 AM, and sunset from 5:29 PM to 4:53 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.75:495:29
211.65:505:28
311.65:515:26
411.65:515:25
511.55:525:24
611.55:535:22
711.55:545:21
811.45:555:20
911.45:555:18
1011.35:565:17
1111.35:575:16
1211.35:585:14
1311.25:595:13
1411.25:595:12
1511.26:005:11
1611.16:015:09
1711.16:025:08
1811.16:035:07
1911.06:045:06
2011.06:045:05
2111.06:055:03
2210.96:065:02
2310.96:075:01
2410.96:085:00
2510.86:094:59
2610.86:104:58
2710.86:114:57
2810.76:124:56
2910.76:124:55
3010.76:134:54
3110.66:144:53

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 4.79 kWh/m².

For context, solar energy here swings from a low near 2.98 kWh/m² to a high of 8.15 kWh/m² in June across the year — October's 4.79 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.4Bright
45.4Bright
55.3Bright
65.3Bright
75.3Bright
85.2Bright
95.2Bright
105.1Bright
115.1Bright
125.0Bright
135.0Bright
144.9Bright
154.9Bright
164.8Bright
174.8Bright
184.7Bright
194.7Bright
204.6Bright
214.5Bright
224.5Bright
234.5Bright
244.4Bright
254.4Bright
264.3Bright
274.3Bright
284.2Bright
294.2Bright
304.2Bright
314.1Bright
Planning a trip in October

Is October a good time to visit Norco?

Our two travel scores rate October for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

8.3
Sightseeing
2nd-best month of the year
8.1
Beach & pool
5th-best month of the year

October is one of the better times to visit Norco for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Norco in October

From October's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In October, Norco sees daytime highs around 79°F and nights near 56°F. Worth packing: light clothes and sun protection. About 3 days see rain.

light clothessun protection

Sea temperature near Norco in October

The nearest coast averages about 67°F in October — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 28 mi away) is warmest in August at about 69°F and coldest in February near 59°F.

It's comfortable for a long swim from Jul 13 to Sep 28 — about 2.6 months when the water holds above 68°F.

60°65°70°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingcomfortable to swim
Sea temperature (°F)Comfort
Jan59Cool
Feb59Cool
Mar59Cool
Apr60Cool
May63Cool
Jun65Cool
Jul68Refreshing
Aug69Refreshing
Sep69Refreshing
Oct67Cool
Nov64Cool
Dec60Cool

UV index in Norco in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Norco peaks around July 12 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJul 12UV 11Dec 16UV 3
UV index (midday)Level
Jan4Moderate
Feb5Moderate
Mar5Moderate
Apr8Very high
May8Very high
Jun11Extreme
Jul11Extreme
Aug10Extreme
Sep8Very high
Oct6High
Nov3Moderate
Dec3Moderate

Air quality in Norco in October

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where October falls, not just the annual average.

Air quality in Norco is worst in September — around 49 µg/m³ PM2.5 (poor), about 4.0× the cleanest month (May, 12 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateSep 1447 µg/m³May 1713 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb19Moderate
Mar19Moderate
Apr17Moderate
May12Moderate
Jun17Moderate
Jul19Moderate
Aug32Moderate
Sep49Poor
Oct21Moderate
Nov21Moderate
Dec18Moderate
Location & terrain

Where is Norco?

Norco sits at 33.9°N, 117.5°W, 640 ft above sea level, in United States. The nearest listed city is Eastvale, 2.5 mi away.

Topography around Norco

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Norco.

Within 2 miles, the terrain around Norco has significant variations in elevation — a maximum elevation change of 876 ft around an average of 709 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 3,566 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 11,430 ft.

The land around Norco is covered by artificial surfaces (51%) within 2 miles, artificial surfaces (46%) and grassland (20%) within 10 miles, and shrubs (24%) and artificial surfaces (24%) within 50 miles.

2 miles
876 ft
10 miles
3,566 ft
50 miles
11,430 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
October weather nearby: Eastvale 2.5 mi · Corona 3.7 mi · Jurupa Valley 4.3 mi · Glen Avon 6.8 mi · Riverside 8.7 mi · Rubidoux 9.3 mi · Chino 9.9 mi · Ontario 11 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Norco (33.9311°, -117.5487°, elevation 640 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).