Monthly outlook for Donnan, IA: average high 59°, average low 45.7°. That is 2.3° above the climate normal for October. Precipitation is expected on 3 days (about 1.2 inches), against a normal of 4 days and 1.3 inches. The warmest day looks like 24 October (68.6°), the coolest 17 October (32.9°).
59°/45.7°
Average high / low
+2.3°
Above normal
3 / 4
Wet days / normal
1.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
16 October – 25 October
61.6°
56°
+3.1°
26 October – 4 November
54.7°
51.6°
+1.8°
5 November – 14 November
at normal
45.7°
—
October records over 66 years
86.4°1 October 1976All-time high
19.9°30 October 1988All-time low
Climate normals and records are computed from the nearest reference point — West Union (5 mi).
Sat, 1756° / 33°0
56 °
Donnan, Saturday, 17 October
Clear. High 56°, low 33°.
Pressure30.50 inHg
Wind12.5 mph SW
Humidity47%
Visibility6.2 mi
Dew point32°
Sun, 1861° / 42°0
61 °
Donnan, Sunday, 18 October
Clear. High 61°, low 42°.
Pressure30.33 inHg
Wind15.9 mph S
Humidity55%
Visibility6.2 mi
Dew point39°
Mon, 1961° / 43°0
61 °
Donnan, Monday, 19 October
Overcast. High 61°, low 43°.
Pressure30.30 inHg
Wind9.7 mph S
Humidity61%
Visibility6.2 mi
Dew point44°
Tue, 2066° / 45°0
66 °
Donnan, Tuesday, 20 October
Clear. High 66°, low 45°.
Pressure30.27 inHg
Wind10.7 mph S
Humidity51%
Visibility—
Dew point44°
Wed, 2166° / 49°0
66 °
Donnan, Wednesday, 21 October
Mostly clear. High 66°, low 49°.
Pressure30.21 inHg
Wind12.1 mph S
Humidity47%
Visibility—
Dew point43°
Thu, 2262° / 56°0.04
62 °
Donnan, Thursday, 22 October
Light rain. High 62°, low 56°.
Pressure30.18 inHg
Wind11.6 mph S
Humidity67%
Visibility—
Dew point49°
Fri, 2368° / 55°0
68 °
Donnan, Friday, 23 October
Overcast. High 68°, low 55°.
Pressure30.09 inHg
Wind15 mph S
Humidity46%
Visibility—
Dew point45°
Sat, 2469° / 56°0
69 °
Donnan, Saturday, 24 October
Clear. High 69°, low 56°.
Pressure30.15 inHg
Wind16.7 mph SE
Humidity55%
Visibility—
Dew point49°
Sun, 2557° / 49°0.02
57 °
Donnan, Sunday, 25 October
Light rain. High 57°, low 49°.
Pressure30.36 inHg
Wind11.7 mph N
Humidity50%
Visibility—
Dew point37°
Mon, 2661° / 47°0.35
61 °
Donnan, Monday, 26 October
Rain. High 61°, low 47°.
Pressure30.00 inHg
Wind13.4 mph S
Humidity68%
Visibility—
Dew point45°
Tue, 2754° / 47°0
54 °
Donnan, Tuesday, 27 October
Light rain. High 54°, low 47°.
Pressure29.97 inHg
Wind11.8 mph W
Humidity84%
Visibility—
Dew point48°
Wed, 2848° / 47°0.73
48 °
Donnan, Wednesday, 28 October
Rain. High 48°, low 47°.
Pressure29.71 inHg
Wind19.8 mph NW
Humidity96%
Visibility—
Dew point46°
Thu, 2955° / 43°0
55 °
Donnan, Thursday, 29 October
Overcast. High 55°, low 43°.
Pressure29.91 inHg
Wind17.2 mph NW
Humidity67%
Visibility—
Dew point41°
Fri, 3055° / 41°0
55 °
Donnan, Friday, 30 October
Clear. High 55°, low 41°.
Pressure30.03 inHg
Wind14.8 mph W
Humidity50%
Visibility—
Dew point34°
Sat, 3156° / 42°0
56 °
Donnan, Saturday, 31 October
Overcast. High 56°, low 42°.
Pressure29.91 inHg
Wind10.5 mph S
Humidity59%
Visibility—
Dew point40°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 0151° / 37°0.18
51 °
Donnan, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high51°
Average low37°
Average precipitation0.18 in
Chance of precipitation28%
Record high72° (2000)
Record low22° (2023)
Mon, 0250° / 36°0.07
50 °
Donnan, Monday, 2 November
Climate normal for this date — 60-year average.
Average high50°
Average low36°
Average precipitation0.07 in
Chance of precipitation28%
Record high69° (2022)
Record low14° (1991)
Tue, 0349° / 35°0.06
49 °
Donnan, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high49°
Average low35°
Average precipitation0.06 in
Chance of precipitation20%
Record high69° (1987)
Record low10° (1991)
Wed, 0449° / 36°0.08
49 °
Donnan, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.08 in
Chance of precipitation25%
Record high69° (2008)
Record low4° (1991)
Thu, 0548° / 35°0.08
48 °
Donnan, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high48°
Average low35°
Average precipitation0.08 in
Chance of precipitation28%
Record high67° (2020)
Record low15° (1991)
Fri, 0648° / 35°0.06
48 °
Donnan, Friday, 6 November
Climate normal for this date — 60-year average.
Average high48°
Average low35°
Average precipitation0.06 in
Chance of precipitation27%
Record high67° (2020)
Record low9° (1991)
Sat, 0748° / 33°0.02
48 °
Donnan, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high48°
Average low33°
Average precipitation0.02 in
Chance of precipitation8%
Record high69° (2001)
Record low-9° (1991)
Sun, 0847° / 33°0.03
47 °
Donnan, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high47°
Average low33°
Average precipitation0.03 in
Chance of precipitation15%
Record high73° (1999)
Record low-2° (1991)
Mon, 0947° / 33°0.11
47 °
Donnan, Monday, 9 November
Climate normal for this date — 60-year average.
Average high47°
Average low33°
Average precipitation0.11 in
Chance of precipitation37%
Record high70° (1999)
Record low15° (1991)
Tue, 1045° / 32°0.1
45 °
Donnan, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high45°
Average low32°
Average precipitation0.1 in
Chance of precipitation32%
Record high70° (2012)
Record low10° (2018)
Wed, 1144° / 30°0.09
44 °
Donnan, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high44°
Average low30°
Average precipitation0.09 in
Chance of precipitation23%
Record high68° (1964)
Record low10° (1986)
Thu, 1242° / 29°0.06
42 °
Donnan, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high42°
Average low29°
Average precipitation0.06 in
Chance of precipitation30%
Record high63° (1964)
Record low5° (2019)
Fri, 1343° / 29°0.06
43 °
Donnan, Friday, 13 November
Climate normal for this date — 60-year average.
Average high43°
Average low29°
Average precipitation0.06 in
Chance of precipitation22%
Record high70° (1999)
Record low3° (1986)
Sat, 1444° / 30°0.02
44 °
Donnan, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high44°
Average low30°
Average precipitation0.02 in
Chance of precipitation20%
Record high66° (2025)
Record low13° (1986)
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 Donnan, 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 Donnan, 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.