Monthly outlook for Riverside, CA: average high 84.8°, average low 67.1°. That is 2.5° above the climate normal for October. Precipitation is expected on 3 days (about 1.3 inches), against a normal of 2 days and 0.4 inches. The warmest day looks like 23 October (96.3°), the coolest 13 October (52°).
84.8°/67.1°
Average high / low
+2.5°
Above normal
3 / 2
Wet days / normal
1.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
10 October – 19 October
81.1°
81°
+0.1°
20 October – 29 October
90.9°
78.2°
+7.1°
30 October – 8 November
at normal
75.2°
—
October records over 66 years
105.6°1 October 2020All-time high
31.6°30 October 1971All-time low
Sun, 1168° / 58°0.85
68 °
Riverside, Sunday, 11 October
Rain. High 68°, low 58°.
Pressure29.71 inHg
Wind5.3 mph W
Humidity89%
Visibility4.7 mi
Dew point62°
Mon, 1266° / 55°0.22
66 °
Riverside, Monday, 12 October
Light rain. High 66°, low 55°.
Pressure29.91 inHg
Wind4.9 mph W
Humidity67%
Visibility4.3 mi
Dew point53°
Tue, 1367° / 52°0
67 °
Riverside, Tuesday, 13 October
Partly cloudy. High 67°, low 52°.
Pressure30.00 inHg
Wind4.8 mph NW
Humidity62%
Visibility6.2 mi
Dew point51°
Wed, 1474° / 52°0
74 °
Riverside, Wednesday, 14 October
Clear. High 74°, low 52°.
Pressure30.03 inHg
Wind3.2 mph SW
Humidity49%
Visibility6.2 mi
Dew point50°
Thu, 1584° / 54°0
84 °
Riverside, Thursday, 15 October
Clear. High 84°, low 54°.
Pressure30.03 inHg
Wind12.2 mph N
Humidity35%
Visibility—
Dew point46°
Fri, 1693° / 63°0
93 °
Riverside, Friday, 16 October
Clear. High 93°, low 63°.
Pressure30.00 inHg
Wind10.3 mph N
Humidity26%
Visibility—
Dew point43°
Sat, 1794° / 73°0
94 °
Riverside, Saturday, 17 October
Clear. High 94°, low 73°.
Pressure30.00 inHg
Wind10.2 mph SE
Humidity12%
Visibility—
Dew point27°
Sun, 1893° / 75°0
93 °
Riverside, Sunday, 18 October
Clear. High 93°, low 75°.
Pressure30.03 inHg
Wind8.1 mph W
Humidity18%
Visibility—
Dew point37°
Mon, 1992° / 76°0
92 °
Riverside, Monday, 19 October
Clear. High 92°, low 76°.
Pressure30.09 inHg
Wind11.5 mph W
Humidity21%
Visibility—
Dew point40°
Tue, 2090° / 74°0
90 °
Riverside, Tuesday, 20 October
Clear. High 90°, low 74°.
Pressure30.03 inHg
Wind9.6 mph W
Humidity22%
Visibility—
Dew point40°
Wed, 2189° / 72°0
89 °
Riverside, Wednesday, 21 October
Clear. High 89°, low 72°.
Pressure29.94 inHg
Wind7.1 mph W
Humidity24%
Visibility—
Dew point40°
Thu, 2294° / 75°0
94 °
Riverside, Thursday, 22 October
Clear. High 94°, low 75°.
Pressure30.03 inHg
Wind6.5 mph W
Humidity15%
Visibility—
Dew point33°
Fri, 2396° / 76°0
96 °
Riverside, Friday, 23 October
Clear. High 96°, low 76°.
Pressure30.00 inHg
Wind12 mph E
Humidity12%
Visibility—
Dew point28°
Sat, 2494° / 78°0
94 °
Riverside, Saturday, 24 October
Overcast. High 94°, low 78°.
Pressure29.88 inHg
Wind10.5 mph W
Humidity18%
Visibility—
Dew point38°
Sun, 2582° / 73°0.16
82 °
Riverside, Sunday, 25 October
Light rain. High 82°, low 73°.
Pressure30.00 inHg
Wind5.7 mph W
Humidity41%
Visibility—
Dew point51°
From day 17 onward the outlook is built from 60-year climate statistics
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)
Sat, 0773° / 50°0.05
73 °
Riverside, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high73°
Average low50°
Average precipitation0.05 in
Chance of precipitation8%
Record high91° (2006)
Record low37° (2011)
Sun, 0873° / 50°0.07
73 °
Riverside, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high73°
Average low50°
Average precipitation0.07 in
Chance of precipitation23%
Record high91° (2016)
Record low36° (2011)
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.