Monthly outlook for Norco, CA: average high 96.7°, average low 75.6°. That is 3.7° above the climate normal for August. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 0 days and 0.1 inches. The warmest day looks like 19 August (101.3°), the coolest 8 August (69.7°).
96.7°/75.6°
Average high / low
+3.7°
Above normal
0 / 0
Wet days / normal
0.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
96°
90.4°
+3.1°
18 August – 27 August
97.7°
90°
+4.3°
28 August – 6 September
at normal
91.8°
—
August records over 66 years
110.8°18 August 2020All-time high
54°22 August 1968All-time low
Climate normals and records are computed from the nearest reference point — Corona (4 mi).
Sun, 0998° / 73°0
98 °
Norco, Sunday, 9 August
Clear. High 98°, low 73°.
Pressure29.83 inHg
Wind8.4 mph W
Humidity21%
Visibility6.2 mi
Dew point52°
Mon, 1099° / 73°0
99 °
Norco, Monday, 10 August
Partly cloudy. High 99°, low 73°.
Pressure29.88 inHg
Wind7.6 mph W
Humidity22%
Visibility6.2 mi
Dew point52°
Tue, 1194° / 77°0
94 °
Norco, Tuesday, 11 August
Overcast. High 94°, low 77°.
Pressure29.94 inHg
Wind7.6 mph W
Humidity23%
Visibility6.2 mi
Dew point49°
Wed, 1295° / 78°0.01
95 °
Norco, Wednesday, 12 August
Light rain. High 95°, low 78°.
Pressure29.85 inHg
Wind8.3 mph W
Humidity23%
Visibility6.2 mi
Dew point49°
Thu, 1393° / 73°0
93 °
Norco, Thursday, 13 August
Overcast. High 93°, low 73°.
Pressure29.88 inHg
Wind11.8 mph W
Humidity36%
Visibility—
Dew point53°
Fri, 1492° / 73°0
92 °
Norco, Friday, 14 August
Overcast. High 92°, low 73°.
Pressure29.94 inHg
Wind12.5 mph W
Humidity36%
Visibility—
Dew point53°
Sat, 1596° / 73°0
96 °
Norco, Saturday, 15 August
Partly cloudy. High 96°, low 73°.
Pressure29.97 inHg
Wind11.3 mph W
Humidity30%
Visibility—
Dew point51°
Sun, 1698° / 76°0
98 °
Norco, Sunday, 16 August
Mostly clear. High 98°, low 76°.
Pressure29.97 inHg
Wind12.1 mph W
Humidity26%
Visibility—
Dew point49°
Mon, 1798° / 76°0
98 °
Norco, Monday, 17 August
Clear. High 98°, low 76°.
Pressure30.00 inHg
Wind12.6 mph W
Humidity23%
Visibility—
Dew point46°
Tue, 18100° / 79°0
100 °
Norco, Tuesday, 18 August
Clear. High 100°, low 79°.
Pressure29.94 inHg
Wind11.7 mph W
Humidity23%
Visibility—
Dew point48°
Wed, 19101° / 81°0
101 °
Norco, Wednesday, 19 August
Clear. High 101°, low 81°.
Pressure29.88 inHg
Wind11.9 mph W
Humidity23%
Visibility—
Dew point49°
Thu, 2099° / 79°0
99 °
Norco, Thursday, 20 August
Mostly clear. High 99°, low 79°.
Pressure29.88 inHg
Wind12.4 mph W
Humidity29%
Visibility—
Dew point54°
Fri, 2198° / 78°0
98 °
Norco, Friday, 21 August
Overcast. High 98°, low 78°.
Pressure29.85 inHg
Wind11.2 mph W
Humidity34%
Visibility—
Dew point56°
Sat, 2293° / 77°0.01
93 °
Norco, Saturday, 22 August
Light rain. High 93°, low 77°.
Pressure29.85 inHg
Wind11.1 mph W
Humidity40%
Visibility—
Dew point59°
Sun, 2395° / 75°0
95 °
Norco, Sunday, 23 August
Mostly clear. High 95°, low 75°.
Pressure29.88 inHg
Wind11.7 mph W
Humidity41%
Visibility—
Dew point60°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2491° / 65°0
91 °
Norco, Monday, 24 August
Climate normal for this date — 60-year average.
Average high91°
Average low65°
Average precipitation0 in
Chance of precipitation0%
Record high104° (1985)
Record low58° (2024)
Tue, 2591° / 66°0
91 °
Norco, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high91°
Average low66°
Average precipitation0 in
Chance of precipitation0%
Record high106° (1985)
Record low58° (2024)
Wed, 2691° / 66°0
91 °
Norco, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high91°
Average low66°
Average precipitation0 in
Chance of precipitation0%
Record high105° (1981)
Record low58° (1990)
Thu, 2792° / 66°0
92 °
Norco, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high92°
Average low66°
Average precipitation0 in
Chance of precipitation3%
Record high106° (1981)
Record low58° (1973)
Fri, 2893° / 66°0
93 °
Norco, Friday, 28 August
Climate normal for this date — 60-year average.
Average high93°
Average low66°
Average precipitation0 in
Chance of precipitation0%
Record high105° (1981)
Record low57° (1973)
Sat, 2993° / 67°0
93 °
Norco, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high93°
Average low67°
Average precipitation0 in
Chance of precipitation0%
Record high105° (2009)
Record low58° (2010)
Sun, 3092° / 67°0
92 °
Norco, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high92°
Average low67°
Average precipitation0 in
Chance of precipitation0%
Record high106° (2017)
Record low57° (1964)
Mon, 3191° / 66°0
91 °
Norco, Monday, 31 August
Climate normal for this date — 60-year average.
Average high91°
Average low66°
Average precipitation0 in
Chance of precipitation0%
Record high108° (2017)
Record low59° (1966)
Tue, 0191° / 66°0.02
91 °
Norco, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high91°
Average low66°
Average precipitation0.02 in
Chance of precipitation5%
Record high108° (2017)
Record low58° (1964)
Wed, 0292° / 66°0.01
92 °
Norco, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high92°
Average low66°
Average precipitation0.01 in
Chance of precipitation7%
Record high106° (1982)
Record low57° (1964)
Thu, 0391° / 66°0.01
91 °
Norco, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high91°
Average low66°
Average precipitation0.01 in
Chance of precipitation7%
Record high107° (1988)
Record low57° (1964)
Fri, 0492° / 66°0
92 °
Norco, Friday, 4 September
Climate normal for this date — 60-year average.
Average high92°
Average low66°
Average precipitation0 in
Chance of precipitation2%
Record high110° (2022)
Record low58° (1964)
Sat, 0592° / 66°0.01
92 °
Norco, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high92°
Average low66°
Average precipitation0.01 in
Chance of precipitation5%
Record high114° (2020)
Record low56° (1973)
Sun, 0692° / 66°0.02
92 °
Norco, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high92°
Average low66°
Average precipitation0.02 in
Chance of precipitation7%
Record high114° (2024)
Record low57° (1970)
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Norco, CA are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in Norco, CA since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.