Monthly outlook for Winchester, CA: average high 75.8°, average low 55.4°. That is 1° below the climate normal for October. Precipitation is expected on 2 days (about 0.3 inches), against a normal of 2 days and 0.4 inches. The warmest day looks like 27 October (85.9°), the coolest 14 October (47.3°).
75.8°/55.4°
Average high / low
−1°
Below normal
2 / 2
Wet days / normal
0.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
12 October – 21 October
74.5°
78.4°
-2.2°
22 October – 31 October
78°
75.1°
+1.6°
1 November – 10 November
at normal
72.4°
—
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).
Tue, 1362° / 49°0
62 °
Winchester, Tuesday, 13 October
Mostly clear. High 62°, low 49°.
Pressure30.00 inHg
Wind5 mph W
Humidity48%
Visibility6.2 mi
Dew point45°
Wed, 1476° / 47°0
76 °
Winchester, Wednesday, 14 October
Clear. High 76°, low 47°.
Pressure30.06 inHg
Wind1.8 mph SW
Humidity33%
Visibility6.2 mi
Dew point42°
Thu, 1582° / 55°0
82 °
Winchester, Thursday, 15 October
Clear. High 82°, low 55°.
Pressure30.00 inHg
Wind5.5 mph NE
Humidity22%
Visibility6.2 mi
Dew point39°
Fri, 1684° / 56°0
84 °
Winchester, Friday, 16 October
Clear. High 84°, low 56°.
Pressure29.94 inHg
Wind13.6 mph NE
Humidity30%
Visibility—
Dew point42°
Sat, 1782° / 60°0
82 °
Winchester, Saturday, 17 October
Clear. High 82°, low 60°.
Pressure29.97 inHg
Wind8.8 mph NE
Humidity37%
Visibility—
Dew point47°
Sun, 1883° / 63°0
83 °
Winchester, Sunday, 18 October
Clear. High 83°, low 63°.
Pressure29.94 inHg
Wind6.7 mph SW
Humidity26%
Visibility—
Dew point38°
Mon, 1981° / 60°0
81 °
Winchester, Monday, 19 October
Clear. High 81°, low 60°.
Pressure29.97 inHg
Wind11.5 mph S
Humidity27%
Visibility—
Dew point38°
Tue, 2070° / 56°0
70 °
Winchester, Tuesday, 20 October
Overcast. High 70°, low 56°.
Pressure29.88 inHg
Wind16.2 mph S
Humidity57%
Visibility—
Dew point48°
Wed, 2165° / 52°0.07
65 °
Winchester, Wednesday, 21 October
Light rain. High 65°, low 52°.
Pressure29.80 inHg
Wind10 mph W
Humidity42%
Visibility—
Dew point37°
Thu, 2266° / 50°0
66 °
Winchester, Thursday, 22 October
Clear. High 66°, low 50°.
Pressure29.94 inHg
Wind6.7 mph SW
Humidity46%
Visibility—
Dew point37°
Fri, 2368° / 50°0
68 °
Winchester, Friday, 23 October
Clear. High 68°, low 50°.
Pressure30.15 inHg
Wind4.5 mph N
Humidity45%
Visibility—
Dew point38°
Sat, 2480° / 54°0
80 °
Winchester, Saturday, 24 October
Clear. High 80°, low 54°.
Pressure30.12 inHg
Wind8.3 mph NE
Humidity15%
Visibility—
Dew point20°
Sun, 2583° / 59°0
83 °
Winchester, Sunday, 25 October
Clear. High 83°, low 59°.
Pressure30.00 inHg
Wind14.8 mph E
Humidity16%
Visibility—
Dew point26°
Mon, 2684° / 62°0
84 °
Winchester, Monday, 26 October
Overcast. High 84°, low 62°.
Pressure30.03 inHg
Wind15.6 mph E
Humidity18%
Visibility—
Dew point31°
Tue, 2786° / 63°0
86 °
Winchester, Tuesday, 27 October
Partly cloudy. High 86°, low 63°.
Pressure30.00 inHg
Wind10.2 mph E
Humidity19%
Visibility—
Dew point33°
From day 17 onward the outlook is built from 60-year climate statistics
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)
Tue, 1070° / 47°0.03
70 °
Winchester, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high70°
Average low47°
Average precipitation0.03 in
Chance of precipitation13%
Record high90° (2025)
Record low37° (2020)
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.