Monthly outlook for Dorchester, IA: average high 62.9°, average low 48.8°. That is 6.7° above the climate normal for October. Precipitation is expected on 6 days (about 1.4 inches), against a normal of 4 days and 1.3 inches. The warmest day looks like 24 October (74.1°), the coolest 4 November (38°).
62.9°/48.8°
Average high / low
+6.7°
Above normal
6 / 4
Wet days / normal
1.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
23 October – 1 November
66.2°
52.5°
+7.6°
2 November – 11 November
57.3°
46.9°
+5.8°
12 November – 21 November
at normal
42°
—
October records over 66 years
85.8°3 October 2025All-time high
19.8°27 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Caledonia (11 mi).
Sat, 2474° / 55°0
74 °
Dorchester, Saturday, 24 October
Overcast. High 74°, low 55°.
Pressure30.24 inHg
Wind11.8 mph S
Humidity58%
Visibility6.2 mi
Dew point52°
Sun, 2570° / 53°0
70 °
Dorchester, Sunday, 25 October
Overcast. High 70°, low 53°.
Pressure30.36 inHg
Wind1.7 mph NW
Humidity74%
Visibility6.2 mi
Dew point56°
Mon, 2661° / 51°0
61 °
Dorchester, Monday, 26 October
Overcast. High 61°, low 51°.
Pressure30.39 inHg
Wind7.4 mph NE
Humidity53%
Visibility6.2 mi
Dew point39°
Tue, 2766° / 48°0.06
66 °
Dorchester, Tuesday, 27 October
Light rain. High 66°, low 48°.
Pressure30.21 inHg
Wind10.4 mph SE
Humidity69%
Visibility6.2 mi
Dew point49°
Wed, 2868° / 54°0.2
68 °
Dorchester, Wednesday, 28 October
Rain. High 68°, low 54°.
Pressure30.09 inHg
Wind12.7 mph S
Humidity60%
Visibility—
Dew point51°
Thu, 2969° / 55°0.3
69 °
Dorchester, Thursday, 29 October
Rain. High 69°, low 55°.
Pressure30.09 inHg
Wind10 mph SW
Humidity62%
Visibility—
Dew point54°
Fri, 3063° / 59°0.39
63 °
Dorchester, Friday, 30 October
Rain. High 63°, low 59°.
Pressure30.09 inHg
Wind4.4 mph E
Humidity94%
Visibility—
Dew point60°
Sat, 3161° / 57°0.3
61 °
Dorchester, Saturday, 31 October
Rain. High 61°, low 57°.
Pressure30.00 inHg
Wind19.6 mph S
Humidity86%
Visibility—
Dew point56°
Sun, 0158° / 45°0.13
58 °
Dorchester, Sunday, 1 November
Light rain. High 58°, low 45°.
Pressure29.94 inHg
Wind18.7 mph W
Humidity48%
Visibility—
Dew point36°
Mon, 0256° / 38°0
56 °
Dorchester, Monday, 2 November
Clear. High 56°, low 38°.
Pressure30.09 inHg
Wind14.7 mph W
Humidity46%
Visibility—
Dew point32°
Tue, 0347° / 39°0
47 °
Dorchester, Tuesday, 3 November
Overcast. High 47°, low 39°.
Pressure30.12 inHg
Wind15.4 mph NW
Humidity43%
Visibility—
Dew point24°
Wed, 0452° / 38°0
52 °
Dorchester, Wednesday, 4 November
Overcast. High 52°, low 38°.
Pressure29.97 inHg
Wind11.5 mph S
Humidity49%
Visibility—
Dew point31°
Thu, 0561° / 42°0
61 °
Dorchester, Thursday, 5 November
Partly cloudy. High 61°, low 42°.
Pressure29.97 inHg
Wind7.9 mph SW
Humidity43%
Visibility—
Dew point36°
Fri, 0667° / 47°0
67 °
Dorchester, Friday, 6 November
Overcast. High 67°, low 47°.
Pressure29.91 inHg
Wind13.7 mph SW
Humidity72%
Visibility—
Dew point55°
Sat, 0761° / 47°0
61 °
Dorchester, Saturday, 7 November
Overcast. High 61°, low 47°.
Pressure30.12 inHg
Wind14 mph NW
Humidity40%
Visibility—
Dew point34°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 0847° / 33°0.03
47 °
Dorchester, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high47°
Average low33°
Average precipitation0.03 in
Chance of precipitation23%
Record high71° (1999)
Record low-8° (1991)
Mon, 0946° / 33°0.12
46 °
Dorchester, Monday, 9 November
Climate normal for this date — 60-year average.
Average high46°
Average low33°
Average precipitation0.12 in
Chance of precipitation32%
Record high70° (1999)
Record low15° (1991)
Tue, 1044° / 32°0.12
44 °
Dorchester, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high44°
Average low32°
Average precipitation0.12 in
Chance of precipitation30%
Record high68° (2012)
Record low11° (2018)
Wed, 1143° / 30°0.07
43 °
Dorchester, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high43°
Average low30°
Average precipitation0.07 in
Chance of precipitation27%
Record high67° (1964)
Record low11° (1986)
Thu, 1241° / 29°0.06
41 °
Dorchester, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high41°
Average low29°
Average precipitation0.06 in
Chance of precipitation30%
Record high61° (1964)
Record low1° (2019)
Fri, 1342° / 29°0.06
42 °
Dorchester, Friday, 13 November
Climate normal for this date — 60-year average.
Average high42°
Average low29°
Average precipitation0.06 in
Chance of precipitation22%
Record high67° (1999)
Record low3° (1986)
Sat, 1443° / 30°0.03
43 °
Dorchester, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high43°
Average low30°
Average precipitation0.03 in
Chance of precipitation22%
Record high64° (2025)
Record low15° (1986)
Sun, 1543° / 31°0.06
43 °
Dorchester, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high43°
Average low31°
Average precipitation0.06 in
Chance of precipitation28%
Record high66° (2001)
Record low15° (2014)
Mon, 1644° / 30°0.06
44 °
Dorchester, Monday, 16 November
Climate normal for this date — 60-year average.
Average high44°
Average low30°
Average precipitation0.06 in
Chance of precipitation28%
Record high62° (2023)
Record low14° (1989)
Tue, 1743° / 30°0.09
43 °
Dorchester, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high43°
Average low30°
Average precipitation0.09 in
Chance of precipitation25%
Record high67° (2016)
Record low4° (2005)
Wed, 1843° / 29°0.08
43 °
Dorchester, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high43°
Average low29°
Average precipitation0.08 in
Chance of precipitation33%
Record high64° (1999)
Record low6° (2014)
Thu, 1942° / 29°0.08
42 °
Dorchester, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high42°
Average low29°
Average precipitation0.08 in
Chance of precipitation30%
Record high61° (1975)
Record low8° (1986)
Fri, 2040° / 28°0.09
40 °
Dorchester, Friday, 20 November
Climate normal for this date — 60-year average.
Average high40°
Average low28°
Average precipitation0.09 in
Chance of precipitation25%
Record high60° (2003)
Record low9° (2022)
Sat, 2139° / 26°0.06
39 °
Dorchester, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high39°
Average low26°
Average precipitation0.06 in
Chance of precipitation22%
Record high66° (1990)
Record low0° (2014)
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 Dorchester, 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 Dorchester, 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.