Monthly outlook for Riverside, CA: average high 84.1°, average low 65.8°. That is 1.8° above the climate normal for October. Precipitation is expected on 2 days (about 0.4 inches), against a normal of 2 days and 0.4 inches. The warmest day looks like 8 October (94.8°), the coolest 14 October (53.5°).
84.1°/65.8°
Average high / low
+1.8°
Above normal
2 / 2
Wet days / normal
0.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 October – 17 October
81.5°
81.6°
-0°
18 October – 27 October
88.3°
79.1°
+5.1°
28 October – 6 November
at normal
75.8°
—
October records over 66 years
105.6°1 October 2020All-time high
31.6°30 October 1971All-time low
Fri, 0993° / 68°0
93 °
Riverside, Friday, 9 October
Clear. High 93°, low 68°.
Pressure29.77 inHg
Wind3.7 mph W
Humidity22%
Visibility6.2 mi
Dew point48°
Sat, 1088° / 65°0
88 °
Riverside, Saturday, 10 October
Overcast. High 88°, low 65°.
Pressure29.65 inHg
Wind1.3 mph NW
Humidity31%
Visibility6.2 mi
Dew point49°
Sun, 1175° / 62°0.3
75 °
Riverside, Sunday, 11 October
Rain. High 75°, low 62°.
Pressure29.62 inHg
Wind1.7 mph E
Humidity71%
Visibility2.0 mi
Dew point61°
Mon, 1267° / 58°0.14
67 °
Riverside, Monday, 12 October
Light rain. High 67°, low 58°.
Pressure29.91 inHg
Wind7.4 mph W
Humidity66%
Visibility4.6 mi
Dew point53°
Tue, 1371° / 56°0
71 °
Riverside, Tuesday, 13 October
Clear. High 71°, low 56°.
Pressure30.03 inHg
Wind6.3 mph W
Humidity58%
Visibility—
Dew point48°
Wed, 1477° / 54°0
77 °
Riverside, Wednesday, 14 October
Mostly clear. High 77°, low 54°.
Pressure30.06 inHg
Wind8.4 mph W
Humidity48%
Visibility—
Dew point46°
Thu, 1582° / 64°0
82 °
Riverside, Thursday, 15 October
Clear. High 82°, low 64°.
Pressure29.97 inHg
Wind9.6 mph W
Humidity32%
Visibility—
Dew point42°
Fri, 1683° / 70°0
83 °
Riverside, Friday, 16 October
Clear. High 83°, low 70°.
Pressure30.06 inHg
Wind18.2 mph NE
Humidity13%
Visibility—
Dew point22°
Sat, 1784° / 69°0
84 °
Riverside, Saturday, 17 October
Clear. High 84°, low 69°.
Pressure30.03 inHg
Wind14.5 mph N
Humidity15%
Visibility—
Dew point26°
Sun, 1886° / 67°0
86 °
Riverside, Sunday, 18 October
Clear. High 86°, low 67°.
Pressure30.06 inHg
Wind6.1 mph W
Humidity18%
Visibility—
Dew point31°
Mon, 1987° / 69°0
87 °
Riverside, Monday, 19 October
Clear. High 87°, low 69°.
Pressure30.03 inHg
Wind6 mph W
Humidity15%
Visibility—
Dew point28°
Tue, 2087° / 70°0
87 °
Riverside, Tuesday, 20 October
Clear. High 87°, low 70°.
Pressure29.97 inHg
Wind9.6 mph W
Humidity15%
Visibility—
Dew point28°
Wed, 2188° / 69°0
88 °
Riverside, Wednesday, 21 October
Clear. High 88°, low 69°.
Pressure29.97 inHg
Wind8.1 mph W
Humidity18%
Visibility—
Dew point32°
Thu, 2290° / 71°0
90 °
Riverside, Thursday, 22 October
Clear. High 90°, low 71°.
Pressure30.00 inHg
Wind5.8 mph W
Humidity11%
Visibility—
Dew point22°
Fri, 2392° / 72°0
92 °
Riverside, Friday, 23 October
Clear. High 92°, low 72°.
Pressure29.91 inHg
Wind10.1 mph W
Humidity14%
Visibility—
Dew point29°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 2479° / 55°0.02
79 °
Riverside, Saturday, 24 October
Climate normal for this date — 60-year average.
Average high79°
Average low55°
Average precipitation0.02 in
Chance of precipitation10%
Record high98° (2017)
Record low41° (1975)
Sun, 2578° / 54°0.02
78 °
Riverside, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high78°
Average low54°
Average precipitation0.02 in
Chance of precipitation8%
Record high97° (2017)
Record low41° (1971)
Mon, 2678° / 53°0.02
78 °
Riverside, Monday, 26 October
Climate normal for this date — 60-year average.
Average high78°
Average low53°
Average precipitation0.02 in
Chance of precipitation10%
Record high94° (2017)
Record low42° (1997)
Tue, 2777° / 53°0.06
77 °
Riverside, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high77°
Average low53°
Average precipitation0.06 in
Chance of precipitation12%
Record high94° (2008)
Record low42° (1996)
Wed, 2877° / 53°0.04
77 °
Riverside, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high77°
Average low53°
Average precipitation0.04 in
Chance of precipitation13%
Record high95° (2008)
Record low41° (1970)
Thu, 2976° / 52°0.02
76 °
Riverside, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high76°
Average low52°
Average precipitation0.02 in
Chance of precipitation10%
Record high92° (2025)
Record low35° (1971)
Fri, 3075° / 52°0.05
75 °
Riverside, Friday, 30 October
Climate normal for this date — 60-year average.
Average high75°
Average low52°
Average precipitation0.05 in
Chance of precipitation18%
Record high91° (1966)
Record low32° (1971)
Sat, 3176° / 51°0.02
76 °
Riverside, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high76°
Average low51°
Average precipitation0.02 in
Chance of precipitation7%
Record high91° (1966)
Record low38° (1991)
Sun, 0177° / 51°0.04
77 °
Riverside, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high77°
Average low51°
Average precipitation0.04 in
Chance of precipitation13%
Record high92° (1997)
Record low38° (1971)
Mon, 0276° / 51°0.03
76 °
Riverside, Monday, 2 November
Climate normal for this date — 60-year average.
Average high76°
Average low51°
Average precipitation0.03 in
Chance of precipitation17%
Record high91° (1997)
Record low39° (1971)
Tue, 0377° / 50°0.01
77 °
Riverside, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high77°
Average low50°
Average precipitation0.01 in
Chance of precipitation7%
Record high94° (2010)
Record low39° (1990)
Wed, 0476° / 50°0.03
76 °
Riverside, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high76°
Average low50°
Average precipitation0.03 in
Chance of precipitation12%
Record high93° (2020)
Record low35° (1994)
Thu, 0575° / 51°0.01
75 °
Riverside, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high75°
Average low51°
Average precipitation0.01 in
Chance of precipitation5%
Record high92° (2020)
Record low40° (2015)
Fri, 0674° / 51°0.02
74 °
Riverside, Friday, 6 November
Climate normal for this date — 60-year average.
Average high74°
Average low51°
Average precipitation0.02 in
Chance of precipitation10%
Record high90° (2006)
Record low41° (2015)
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 Riverside, 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 Riverside, 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.