Monthly outlook for Perris, CA: average high 99.2°, average low 68°. That is 5° above the climate normal for August. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 2 days and 0.3 inches. The warmest day looks like 19 August (103.1°), the coolest 14 August (63.5°).
99.2°/68°
Average high / low
+5°
Above normal
0 / 2
Wet days / normal
0.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
98.1°
90.8°
+4.1°
18 August – 27 August
100.9°
89.9°
+6.1°
28 August – 6 September
at normal
91.4°
—
August records over 66 years
109.8°15 August 2020All-time high
51.3°22 August 1968All-time low
Climate normals and records are computed from the nearest reference point — Moreno Valley (9 mi).
Sun, 0998° / 71°0.01
98 °
Perris, Sunday, 9 August
Light rain. High 98°, low 71°.
Pressure29.80 inHg
Wind3.8 mph W
Humidity15%
Visibility6.2 mi
Dew point46°
Mon, 10102° / 72°0
102 °
Perris, Monday, 10 August
Mostly clear. High 102°, low 72°.
Pressure29.88 inHg
Wind2.6 mph W
Humidity19%
Visibility6.2 mi
Dew point50°
Tue, 1195° / 68°0
95 °
Perris, Tuesday, 11 August
Overcast. High 95°, low 68°.
Pressure29.94 inHg
Wind2.9 mph SW
Humidity21%
Visibility6.2 mi
Dew point47°
Wed, 1297° / 68°0
97 °
Perris, Wednesday, 12 August
Light rain. High 97°, low 68°.
Pressure29.85 inHg
Wind2.1 mph NW
Humidity22%
Visibility6.2 mi
Dew point48°
Thu, 1394° / 64°0
94 °
Perris, Thursday, 13 August
Partly cloudy. High 94°, low 64°.
Pressure29.88 inHg
Wind8.6 mph W
Humidity27%
Visibility—
Dew point44°
Fri, 1493° / 64°0
93 °
Perris, Friday, 14 August
Overcast. High 93°, low 64°.
Pressure29.94 inHg
Wind7.4 mph W
Humidity28%
Visibility—
Dew point45°
Sat, 1599° / 65°0
99 °
Perris, Saturday, 15 August
Partly cloudy. High 99°, low 65°.
Pressure29.97 inHg
Wind7.4 mph NW
Humidity26%
Visibility—
Dew point47°
Sun, 16100° / 67°0
100 °
Perris, Sunday, 16 August
Overcast. High 100°, low 67°.
Pressure29.97 inHg
Wind6 mph NW
Humidity22%
Visibility—
Dew point45°
Mon, 17101° / 66°0
101 °
Perris, Monday, 17 August
Mostly clear. High 101°, low 66°.
Pressure30.00 inHg
Wind10.5 mph NW
Humidity20%
Visibility—
Dew point42°
Tue, 18102° / 68°0
102 °
Perris, Tuesday, 18 August
Clear. High 102°, low 68°.
Pressure29.94 inHg
Wind10.6 mph NW
Humidity19%
Visibility—
Dew point43°
Wed, 19103° / 70°0
103 °
Perris, Wednesday, 19 August
Mostly clear. High 103°, low 70°.
Pressure29.88 inHg
Wind5.7 mph W
Humidity20%
Visibility—
Dew point44°
Thu, 20102° / 69°0
102 °
Perris, Thursday, 20 August
Partly cloudy. High 102°, low 69°.
Pressure29.85 inHg
Wind6 mph W
Humidity21%
Visibility—
Dew point46°
Fri, 21100° / 70°0
100 °
Perris, Friday, 21 August
Overcast. High 100°, low 70°.
Pressure29.85 inHg
Wind4.5 mph NW
Humidity27%
Visibility—
Dew point51°
Sat, 22100° / 69°0.01
100 °
Perris, Saturday, 22 August
Light rain. High 100°, low 69°.
Pressure29.85 inHg
Wind5.3 mph W
Humidity30%
Visibility—
Dew point53°
Sun, 2399° / 69°0
99 °
Perris, Sunday, 23 August
Overcast. High 99°, low 69°.
Pressure29.85 inHg
Wind4.7 mph W
Humidity33%
Visibility—
Dew point55°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2491° / 66°0.01
91 °
Perris, Monday, 24 August
Climate normal for this date — 60-year average.
Average high91°
Average low66°
Average precipitation0.01 in
Chance of precipitation8%
Record high104° (1985)
Record low56° (2024)
Tue, 2591° / 67°0.02
91 °
Perris, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high91°
Average low67°
Average precipitation0.02 in
Chance of precipitation10%
Record high103° (1985)
Record low57° (2024)
Wed, 2691° / 67°0.01
91 °
Perris, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high91°
Average low67°
Average precipitation0.01 in
Chance of precipitation12%
Record high103° (2021)
Record low56° (1973)
Thu, 2792° / 67°0.01
92 °
Perris, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high92°
Average low67°
Average precipitation0.01 in
Chance of precipitation8%
Record high104° (2021)
Record low56° (1973)
Fri, 2893° / 67°0.01
93 °
Perris, Friday, 28 August
Climate normal for this date — 60-year average.
Average high93°
Average low67°
Average precipitation0.01 in
Chance of precipitation3%
Record high106° (2017)
Record low55° (1973)
Sat, 2993° / 67°0.01
93 °
Perris, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high93°
Average low67°
Average precipitation0.01 in
Chance of precipitation10%
Record high108° (2017)
Record low56° (2010)
Sun, 3092° / 67°0.01
92 °
Perris, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high92°
Average low67°
Average precipitation0.01 in
Chance of precipitation12%
Record high107° (2017)
Record low56° (2010)
Mon, 3191° / 67°0
91 °
Perris, Monday, 31 August
Climate normal for this date — 60-year average.
Average high91°
Average low67°
Average precipitation0 in
Chance of precipitation5%
Record high107° (2022)
Record low55° (1992)
Tue, 0191° / 66°0.02
91 °
Perris, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high91°
Average low66°
Average precipitation0.02 in
Chance of precipitation8%
Record high107° (2017)
Record low55° (1964)
Wed, 0291° / 66°0.02
91 °
Perris, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high91°
Average low66°
Average precipitation0.02 in
Chance of precipitation18%
Record high105° (2022)
Record low53° (1964)
Thu, 0391° / 66°0.02
91 °
Perris, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high91°
Average low66°
Average precipitation0.02 in
Chance of precipitation12%
Record high110° (2022)
Record low56° (1964)
Fri, 0491° / 67°0.01
91 °
Perris, Friday, 4 September
Climate normal for this date — 60-year average.
Average high91°
Average low67°
Average precipitation0.01 in
Chance of precipitation8%
Record high107° (2022)
Record low55° (1985)
Sat, 0591° / 66°0.01
91 °
Perris, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high91°
Average low66°
Average precipitation0.01 in
Chance of precipitation8%
Record high113° (2020)
Record low57° (1985)
Sun, 0691° / 66°0.02
91 °
Perris, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high91°
Average low66°
Average precipitation0.02 in
Chance of precipitation8%
Record high114° (2020)
Record low54° (1985)
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 Perris, 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 Perris, 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.