Monthly outlook for Winchester, CA: average high 78.1°, average low 58.4°. That is 0.1° above the climate normal for October. Precipitation is expected on 3 days (about 1.2 inches), against a normal of 2 days and 0.4 inches. The warmest day looks like 22 October (88.2°), the coolest 14 October (48.3°).
78.1°/58.4°
Average high / low
+0.1°
Above normal
3 / 2
Wet days / normal
1.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
11 October – 20 October
78.4°
78.6°
-0.1°
21 October – 30 October
77.5°
75.4°
+1.1°
31 October – 9 November
at normal
72.7°
—
October records over 66 years
108°2 October 2024All-time high
30.6°30 October 1971All-time low
Climate normals and records are computed from the nearest reference point — Hemet (5 mi).
Mon, 1262° / 53°0.16
62 °
Winchester, Monday, 12 October
Light rain. High 62°, low 53°.
Pressure29.91 inHg
Wind12.6 mph SW
Humidity61%
Visibility6.2 mi
Dew point49°
Tue, 1368° / 49°0
68 °
Winchester, Tuesday, 13 October
Partly cloudy. High 68°, low 49°.
Pressure30.00 inHg
Wind4.2 mph W
Humidity46%
Visibility6.2 mi
Dew point43°
Wed, 1477° / 48°0
77 °
Winchester, Wednesday, 14 October
Clear. High 77°, low 48°.
Pressure30.03 inHg
Wind2.1 mph SW
Humidity36%
Visibility6.2 mi
Dew point42°
Thu, 1583° / 55°0
83 °
Winchester, Thursday, 15 October
Clear. High 83°, low 55°.
Pressure30.00 inHg
Wind7.5 mph NE
Humidity31%
Visibility—
Dew point41°
Fri, 1685° / 57°0
85 °
Winchester, Friday, 16 October
Clear. High 85°, low 57°.
Pressure29.97 inHg
Wind12.9 mph E
Humidity27%
Visibility—
Dew point39°
Sat, 1785° / 66°0
85 °
Winchester, Saturday, 17 October
Clear. High 85°, low 66°.
Pressure30.06 inHg
Wind13.4 mph E
Humidity17%
Visibility—
Dew point31°
Sun, 1887° / 62°0
87 °
Winchester, Sunday, 18 October
Clear. High 87°, low 62°.
Pressure30.03 inHg
Wind8 mph NE
Humidity14%
Visibility—
Dew point26°
Mon, 1986° / 64°0
86 °
Winchester, Monday, 19 October
Clear. High 86°, low 64°.
Pressure30.03 inHg
Wind5 mph W
Humidity15%
Visibility—
Dew point28°
Tue, 2087° / 63°0
87 °
Winchester, Tuesday, 20 October
Clear. High 87°, low 63°.
Pressure29.97 inHg
Wind5.5 mph W
Humidity16%
Visibility—
Dew point29°
Wed, 2187° / 64°0
87 °
Winchester, Wednesday, 21 October
Clear. High 87°, low 64°.
Pressure29.94 inHg
Wind5.5 mph SW
Humidity14%
Visibility—
Dew point26°
Thu, 2288° / 64°0
88 °
Winchester, Thursday, 22 October
Clear. High 88°, low 64°.
Pressure29.97 inHg
Wind9.3 mph SW
Humidity15%
Visibility—
Dew point28°
Fri, 2385° / 63°0
85 °
Winchester, Friday, 23 October
Partly cloudy. High 85°, low 63°.
Pressure29.97 inHg
Wind5.6 mph SW
Humidity25%
Visibility—
Dew point39°
Sat, 2474° / 61°0
74 °
Winchester, Saturday, 24 October
Overcast. High 74°, low 61°.
Pressure29.94 inHg
Wind4.2 mph SW
Humidity45%
Visibility—
Dew point47°
Sun, 2571° / 56°0.02
71 °
Winchester, Sunday, 25 October
Light rain. High 71°, low 56°.
Pressure29.91 inHg
Wind5.2 mph SW
Humidity50%
Visibility—
Dew point45°
Mon, 2659° / 55°0.36
59 °
Winchester, Monday, 26 October
Rain. High 59°, low 55°.
Pressure29.91 inHg
Wind4.1 mph W
Humidity80%
Visibility—
Dew point52°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2775° / 52°0.05
75 °
Winchester, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high75°
Average low52°
Average precipitation0.05 in
Chance of precipitation12%
Record high92° (2017)
Record low38° (1996)
Wed, 2874° / 52°0.04
74 °
Winchester, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high74°
Average low52°
Average precipitation0.04 in
Chance of precipitation15%
Record high92° (2017)
Record low39° (1970)
Thu, 2973° / 51°0.02
73 °
Winchester, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high73°
Average low51°
Average precipitation0.02 in
Chance of precipitation8%
Record high93° (2025)
Record low35° (1971)
Fri, 3072° / 50°0.04
72 °
Winchester, Friday, 30 October
Climate normal for this date — 60-year average.
Average high72°
Average low50°
Average precipitation0.04 in
Chance of precipitation17%
Record high89° (1966)
Record low31° (1971)
Sat, 3173° / 50°0.02
73 °
Winchester, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high73°
Average low50°
Average precipitation0.02 in
Chance of precipitation12%
Record high89° (1966)
Record low35° (1991)
Sun, 0174° / 49°0.02
74 °
Winchester, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high74°
Average low49°
Average precipitation0.02 in
Chance of precipitation12%
Record high91° (2025)
Record low35° (1971)
Mon, 0274° / 49°0.01
74 °
Winchester, Monday, 2 November
Climate normal for this date — 60-year average.
Average high74°
Average low49°
Average precipitation0.01 in
Chance of precipitation12%
Record high88° (2025)
Record low36° (1971)
Tue, 0375° / 49°0.01
75 °
Winchester, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high75°
Average low49°
Average precipitation0.01 in
Chance of precipitation10%
Record high88° (2009)
Record low38° (1990)
Wed, 0474° / 50°0.03
74 °
Winchester, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high74°
Average low50°
Average precipitation0.03 in
Chance of precipitation8%
Record high91° (2020)
Record low34° (1994)
Thu, 0573° / 50°0.01
73 °
Winchester, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high73°
Average low50°
Average precipitation0.01 in
Chance of precipitation5%
Record high91° (2020)
Record low37° (2015)
Fri, 0672° / 49°0.01
72 °
Winchester, Friday, 6 November
Climate normal for this date — 60-year average.
Average high72°
Average low49°
Average precipitation0.01 in
Chance of precipitation10%
Record high87° (2006)
Record low38° (1996)
Sat, 0771° / 49°0.05
71 °
Winchester, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high71°
Average low49°
Average precipitation0.05 in
Chance of precipitation7%
Record high89° (2006)
Record low36° (2011)
Sun, 0871° / 49°0.07
71 °
Winchester, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high71°
Average low49°
Average precipitation0.07 in
Chance of precipitation20%
Record high89° (2025)
Record low35° (2011)
Mon, 0970° / 47°0.06
70 °
Winchester, Monday, 9 November
Climate normal for this date — 60-year average.
Average high70°
Average low47°
Average precipitation0.06 in
Chance of precipitation17%
Record high88° (2025)
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 Winchester, 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 Winchester, 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.