Monthly outlook for Arlanza, CA: average high 77.7°, average low 63.4°. That is 0° above the climate normal for October. Precipitation is expected on 3 days (about 1.4 inches), against a normal of 2 days and 0.5 inches. The warmest day looks like 19 October (87.5°), the coolest 30 October (55°).
77.7°/63.4°
Average high / low
+0°
Above normal
3 / 2
Wet days / normal
1.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
17 October – 26 October
80°
78.8°
+0.7°
27 October – 5 November
73.7°
75.6°
-1°
6 November – 15 November
at normal
71.8°
—
October records over 66 years
106.5°1 October 2020All-time high
31.3°30 October 1971All-time low
Climate normals and records are computed from the nearest reference point — Jurupa Valley (4 mi).
Sun, 1886° / 70°0
86 °
Arlanza, Sunday, 18 October
Clear. High 86°, low 70°.
Pressure29.97 inHg
Wind1.1 mph S
Humidity17%
Visibility6.2 mi
Dew point36°
Mon, 1987° / 62°0
87 °
Arlanza, Monday, 19 October
Clear. High 87°, low 62°.
Pressure29.88 inHg
Wind1.9 mph NW
Humidity24%
Visibility6.2 mi
Dew point43°
Tue, 2085° / 63°0
85 °
Arlanza, Tuesday, 20 October
Clear. High 85°, low 63°.
Pressure29.88 inHg
Wind1.2 mph N
Humidity34%
Visibility6.2 mi
Dew point47°
Wed, 2177° / 62°0.56
77 °
Arlanza, Wednesday, 21 October
Rain. High 77°, low 62°.
Pressure29.88 inHg
Wind9.1 mph W
Humidity46%
Visibility—
Dew point50°
Thu, 2266° / 61°0.57
66 °
Arlanza, Thursday, 22 October
Rain. High 66°, low 61°.
Pressure29.94 inHg
Wind5.5 mph NW
Humidity95%
Visibility—
Dew point60°
Fri, 2373° / 62°0
73 °
Arlanza, Friday, 23 October
Light rain. High 73°, low 62°.
Pressure30.03 inHg
Wind8.1 mph W
Humidity56%
Visibility—
Dew point50°
Sat, 2479° / 63°0
79 °
Arlanza, Saturday, 24 October
Clear. High 79°, low 63°.
Pressure30.03 inHg
Wind13 mph N
Humidity25%
Visibility—
Dew point34°
Sun, 2580° / 63°0
80 °
Arlanza, Sunday, 25 October
Overcast. High 80°, low 63°.
Pressure30.03 inHg
Wind4.6 mph E
Humidity11%
Visibility—
Dew point15°
Mon, 2682° / 68°0
82 °
Arlanza, Monday, 26 October
Overcast. High 82°, low 68°.
Pressure29.80 inHg
Wind3.4 mph E
Humidity12%
Visibility—
Dew point19°
Tue, 2779° / 67°0
79 °
Arlanza, Tuesday, 27 October
Clear. High 79°, low 67°.
Pressure29.77 inHg
Wind7.4 mph W
Humidity15%
Visibility—
Dew point23°
Wed, 2879° / 65°0
79 °
Arlanza, Wednesday, 28 October
Clear. High 79°, low 65°.
Pressure30.03 inHg
Wind9.6 mph W
Humidity38%
Visibility—
Dew point45°
Thu, 2966° / 58°0.24
66 °
Arlanza, Thursday, 29 October
Rain. High 66°, low 58°.
Pressure30.00 inHg
Wind14.1 mph W
Humidity72%
Visibility—
Dew point57°
Fri, 3066° / 55°0.02
66 °
Arlanza, Friday, 30 October
Light rain. High 66°, low 55°.
Pressure29.85 inHg
Wind9.9 mph SW
Humidity37%
Visibility—
Dew point34°
Sat, 3172° / 58°0
72 °
Arlanza, Saturday, 31 October
Clear. High 72°, low 58°.
Pressure30.00 inHg
Wind8.5 mph W
Humidity28%
Visibility—
Dew point31°
Sun, 0180° / 62°0
80 °
Arlanza, Sunday, 1 November
Clear. High 80°, low 62°.
Pressure30.12 inHg
Wind5.3 mph NW
Humidity13%
Visibility—
Dew point18°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 0276° / 50°0.03
76 °
Arlanza, Monday, 2 November
Climate normal for this date — 60-year average.
Average high76°
Average low50°
Average precipitation0.03 in
Chance of precipitation17%
Record high91° (1997)
Record low38° (1971)
Tue, 0376° / 49°0.01
76 °
Arlanza, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high76°
Average low49°
Average precipitation0.01 in
Chance of precipitation5%
Record high93° (2010)
Record low39° (1990)
Wed, 0476° / 50°0.03
76 °
Arlanza, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high76°
Average low50°
Average precipitation0.03 in
Chance of precipitation12%
Record high94° (2020)
Record low35° (1994)
Thu, 0575° / 50°0.01
75 °
Arlanza, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high75°
Average low50°
Average precipitation0.01 in
Chance of precipitation5%
Record high94° (2020)
Record low39° (2015)
Fri, 0673° / 50°0.02
73 °
Arlanza, Friday, 6 November
Climate normal for this date — 60-year average.
Average high73°
Average low50°
Average precipitation0.02 in
Chance of precipitation10%
Record high90° (2006)
Record low41° (2015)
Sat, 0772° / 50°0.06
72 °
Arlanza, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high72°
Average low50°
Average precipitation0.06 in
Chance of precipitation8%
Record high91° (2006)
Record low37° (2011)
Sun, 0872° / 50°0.07
72 °
Arlanza, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high72°
Average low50°
Average precipitation0.07 in
Chance of precipitation23%
Record high91° (2016)
Record low36° (2011)
Mon, 0972° / 49°0.06
72 °
Arlanza, Monday, 9 November
Climate normal for this date — 60-year average.
Average high72°
Average low49°
Average precipitation0.06 in
Chance of precipitation17%
Record high92° (2025)
Record low37° (2011)
Tue, 1071° / 49°0.04
71 °
Arlanza, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high71°
Average low49°
Average precipitation0.04 in
Chance of precipitation15%
Record high93° (2025)
Record low39° (2020)
Wed, 1171° / 48°0.07
71 °
Arlanza, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high71°
Average low48°
Average precipitation0.07 in
Chance of precipitation15%
Record high88° (2021)
Record low36° (2012)
Thu, 1272° / 48°0.04
72 °
Arlanza, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high72°
Average low48°
Average precipitation0.04 in
Chance of precipitation13%
Record high91° (2021)
Record low32° (2000)
Fri, 1372° / 47°0.04
72 °
Arlanza, Friday, 13 November
Climate normal for this date — 60-year average.
Average high72°
Average low47°
Average precipitation0.04 in
Chance of precipitation13%
Record high92° (2021)
Record low32° (1985)
Sat, 1471° / 48°0.05
71 °
Arlanza, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high71°
Average low48°
Average precipitation0.05 in
Chance of precipitation17%
Record high92° (2021)
Record low33° (1985)
Sun, 1571° / 47°0.06
71 °
Arlanza, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high71°
Average low47°
Average precipitation0.06 in
Chance of precipitation12%
Record high88° (2021)
Record low31° (1964)
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 Arlanza, 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 Arlanza, 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.