Monthly outlook for Winchester, IA: average high 60.9°, average low 43.1°. That is 1.3° above the climate normal for October. Precipitation is expected on 3 days (about 0.6 inches), against a normal of 4 days and 1.5 inches. The warmest day looks like 22 October (71.4°), the coolest 29 October (28.3°).
60.9°/43.1°
Average high / low
+1.3°
Above normal
3 / 4
Wet days / normal
0.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
19 October – 28 October
64°
59.8°
+2.3°
29 October – 7 November
55.7°
55.3°
+0.2°
8 November – 17 November
at normal
50.1°
—
October records over 66 years
93.2°6 October 1963All-time high
17.2°29 October 1980All-time low
Climate normals and records are computed from the nearest reference point — Fairfield (11 mi).
Tue, 2070° / 42°0
70 °
Winchester, Tuesday, 20 October
Clear. High 70°, low 42°.
Pressure30.33 inHg
Wind5.9 mph SE
Humidity51%
Visibility6.2 mi
Dew point47°
Wed, 2170° / 46°0
70 °
Winchester, Wednesday, 21 October
Clear. High 70°, low 46°.
Pressure30.27 inHg
Wind4.2 mph SW
Humidity57%
Visibility6.2 mi
Dew point51°
Thu, 2271° / 49°0
71 °
Winchester, Thursday, 22 October
Clear. High 71°, low 49°.
Pressure30.30 inHg
Wind3 mph SE
Humidity51%
Visibility6.2 mi
Dew point50°
Fri, 2369° / 51°0
69 °
Winchester, Friday, 23 October
Clear. High 69°, low 51°.
Pressure30.27 inHg
Wind9.9 mph SE
Humidity60%
Visibility6.2 mi
Dew point51°
Sat, 2468° / 51°0
68 °
Winchester, Saturday, 24 October
Overcast. High 68°, low 51°.
Pressure30.33 inHg
Wind10.7 mph SE
Humidity50%
Visibility—
Dew point45°
Sun, 2567° / 55°0.06
67 °
Winchester, Sunday, 25 October
Light rain. High 67°, low 55°.
Pressure30.33 inHg
Wind8.7 mph S
Humidity74%
Visibility—
Dew point55°
Mon, 2660° / 49°0.17
60 °
Winchester, Monday, 26 October
Rain. High 60°, low 49°.
Pressure30.33 inHg
Wind9.8 mph NE
Humidity40%
Visibility—
Dew point34°
Tue, 2752° / 40°0.35
52 °
Winchester, Tuesday, 27 October
Rain. High 52°, low 40°.
Pressure30.39 inHg
Wind14 mph N
Humidity55%
Visibility—
Dew point32°
Wed, 2843° / 28°0
43 °
Winchester, Wednesday, 28 October
Clear. High 43°, low 28°.
Pressure30.56 inHg
Wind11.5 mph N
Humidity35%
Visibility—
Dew point14°
Thu, 2949° / 28°0
49 °
Winchester, Thursday, 29 October
Clear. High 49°, low 28°.
Pressure30.47 inHg
Wind7.2 mph SW
Humidity30%
Visibility—
Dew point14°
Fri, 3056° / 33°0
56 °
Winchester, Friday, 30 October
Clear. High 56°, low 33°.
Pressure30.18 inHg
Wind18.2 mph SW
Humidity32%
Visibility—
Dew point22°
Sat, 3162° / 45°0
62 °
Winchester, Saturday, 31 October
Mostly clear. High 62°, low 45°.
Pressure30.03 inHg
Wind16.8 mph SW
Humidity48%
Visibility—
Dew point39°
Sun, 0160° / 51°0
60 °
Winchester, Sunday, 1 November
Overcast. High 60°, low 51°.
Pressure30.06 inHg
Wind9.1 mph SW
Humidity55%
Visibility—
Dew point42°
Mon, 0252° / 43°0
52 °
Winchester, Monday, 2 November
Overcast. High 52°, low 43°.
Pressure30.21 inHg
Wind11.8 mph NE
Humidity72%
Visibility—
Dew point42°
Tue, 0356° / 38°0
56 °
Winchester, Tuesday, 3 November
Overcast. High 56°, low 38°.
Pressure30.12 inHg
Wind11.3 mph SE
Humidity49%
Visibility—
Dew point33°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 0454° / 40°0.1
54 °
Winchester, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high54°
Average low40°
Average precipitation0.1 in
Chance of precipitation23%
Record high72° (1978)
Record low11° (1991)
Thu, 0553° / 38°0.07
53 °
Winchester, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high53°
Average low38°
Average precipitation0.07 in
Chance of precipitation30%
Record high73° (1978)
Record low20° (1991)
Fri, 0654° / 38°0.07
54 °
Winchester, Friday, 6 November
Climate normal for this date — 60-year average.
Average high54°
Average low38°
Average precipitation0.07 in
Chance of precipitation22%
Record high72° (2020)
Record low18° (1991)
Sat, 0753° / 37°0.02
53 °
Winchester, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high53°
Average low37°
Average precipitation0.02 in
Chance of precipitation15%
Record high72° (1966)
Record low3° (1991)
Sun, 0853° / 37°0.04
53 °
Winchester, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high53°
Average low37°
Average precipitation0.04 in
Chance of precipitation22%
Record high77° (1999)
Record low-7° (1991)
Mon, 0953° / 38°0.11
53 °
Winchester, Monday, 9 November
Climate normal for this date — 60-year average.
Average high53°
Average low38°
Average precipitation0.11 in
Chance of precipitation32%
Record high75° (1999)
Record low8° (1991)
Tue, 1051° / 35°0.1
51 °
Winchester, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high51°
Average low35°
Average precipitation0.1 in
Chance of precipitation25%
Record high74° (2012)
Record low15° (2018)
Wed, 1149° / 34°0.06
49 °
Winchester, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high49°
Average low34°
Average precipitation0.06 in
Chance of precipitation28%
Record high74° (1964)
Record low15° (2019)
Thu, 1248° / 33°0.07
48 °
Winchester, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high48°
Average low33°
Average precipitation0.07 in
Chance of precipitation27%
Record high68° (1964)
Record low7° (2019)
Fri, 1349° / 33°0.06
49 °
Winchester, Friday, 13 November
Climate normal for this date — 60-year average.
Average high49°
Average low33°
Average precipitation0.06 in
Chance of precipitation22%
Record high75° (1999)
Record low7° (1986)
Sat, 1449° / 34°0.04
49 °
Winchester, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high49°
Average low34°
Average precipitation0.04 in
Chance of precipitation25%
Record high73° (2025)
Record low15° (1986)
Sun, 1549° / 34°0.06
49 °
Winchester, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high49°
Average low34°
Average precipitation0.06 in
Chance of precipitation20%
Record high71° (2001)
Record low5° (1972)
Mon, 1649° / 34°0.05
49 °
Winchester, Monday, 16 November
Climate normal for this date — 60-year average.
Average high49°
Average low34°
Average precipitation0.05 in
Chance of precipitation20%
Record high70° (2001)
Record low17° (1997)
Tue, 1750° / 35°0.12
50 °
Winchester, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high50°
Average low35°
Average precipitation0.12 in
Chance of precipitation23%
Record high74° (2016)
Record low15° (2005)
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, IA 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, IA 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.