Monthly outlook for Donnan, IA: average high 64°, average low 48.5°. That is 4.2° above the climate normal for October. Precipitation is expected on 5 days (about 1.3 inches), against a normal of 4 days and 1.4 inches. The warmest day looks like 12 October (86.3°), the coolest 17 October (37.9°).
64°/48.5°
Average high / low
+4.2°
Above normal
5 / 4
Wet days / normal
1.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
12 October – 21 October
65.4°
57.5°
+4.4°
22 October – 31 October
61.5°
53.7°
+4.3°
1 November – 10 November
at normal
48.3°
—
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).
Tue, 1374° / 55°0
74 °
Donnan, Tuesday, 13 October
Clear. High 74°, low 55°.
Pressure29.88 inHg
Wind6.6 mph NW
Humidity64%
Visibility6.2 mi
Dew point53°
Wed, 1463° / 50°0
63 °
Donnan, Wednesday, 14 October
Clear. High 63°, low 50°.
Pressure30.15 inHg
Wind9 mph N
Humidity62%
Visibility6.2 mi
Dew point47°
Thu, 1558° / 54°0.08
58 °
Donnan, Thursday, 15 October
Light rain. High 58°, low 54°.
Pressure30.18 inHg
Wind4.8 mph E
Humidity80%
Visibility6.1 mi
Dew point51°
Fri, 1655° / 44°0
55 °
Donnan, Friday, 16 October
Clear. High 55°, low 44°.
Pressure30.53 inHg
Wind21 mph N
Humidity46%
Visibility—
Dew point33°
Sat, 1758° / 38°0
58 °
Donnan, Saturday, 17 October
Clear. High 58°, low 38°.
Pressure30.36 inHg
Wind13.5 mph S
Humidity38%
Visibility—
Dew point29°
Sun, 1858° / 39°0
58 °
Donnan, Sunday, 18 October
Clear. High 58°, low 39°.
Pressure30.12 inHg
Wind19.7 mph SW
Humidity49%
Visibility—
Dew point35°
Mon, 1961° / 45°0
61 °
Donnan, Monday, 19 October
Overcast. High 61°, low 45°.
Pressure30.12 inHg
Wind10.9 mph S
Humidity56%
Visibility—
Dew point40°
Tue, 2068° / 49°0
68 °
Donnan, Tuesday, 20 October
Clear. High 68°, low 49°.
Pressure30.18 inHg
Wind9.5 mph S
Humidity56%
Visibility—
Dew point48°
Wed, 2171° / 56°0
71 °
Donnan, Wednesday, 21 October
Partly cloudy. High 71°, low 56°.
Pressure30.24 inHg
Wind15.3 mph S
Humidity65%
Visibility—
Dew point56°
Thu, 2271° / 58°0.36
71 °
Donnan, Thursday, 22 October
Rain. High 71°, low 58°.
Pressure30.12 inHg
Wind17.1 mph SW
Humidity64%
Visibility—
Dew point57°
Fri, 2364° / 46°0.18
64 °
Donnan, Friday, 23 October
Rain. High 64°, low 46°.
Pressure30.33 inHg
Wind13.9 mph N
Humidity47%
Visibility—
Dew point38°
Sat, 2457° / 40°0.09
57 °
Donnan, Saturday, 24 October
Light rain. High 57°, low 40°.
Pressure30.30 inHg
Wind17.9 mph SE
Humidity54%
Visibility—
Dew point37°
Sun, 2560° / 50°0.56
60 °
Donnan, Sunday, 25 October
Rain. High 60°, low 50°.
Pressure29.68 inHg
Wind19.7 mph S
Humidity85%
Visibility—
Dew point55°
Mon, 2657° / 42°0
57 °
Donnan, Monday, 26 October
Clear. High 57°, low 42°.
Pressure30.15 inHg
Wind13.4 mph N
Humidity55%
Visibility—
Dew point37°
Tue, 2759° / 42°0
59 °
Donnan, Tuesday, 27 October
Clear. High 59°, low 42°.
Pressure30.09 inHg
Wind7.9 mph SW
Humidity51%
Visibility—
Dew point38°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 2852° / 38°0.07
52 °
Donnan, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high52°
Average low38°
Average precipitation0.07 in
Chance of precipitation23%
Record high71° (2016)
Record low23° (1969)
Thu, 2953° / 38°0.1
53 °
Donnan, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high53°
Average low38°
Average precipitation0.1 in
Chance of precipitation30%
Record high79° (2024)
Record low22° (1980)
Fri, 3054° / 39°0.08
54 °
Donnan, Friday, 30 October
Climate normal for this date — 60-year average.
Average high54°
Average low39°
Average precipitation0.08 in
Chance of precipitation27%
Record high76° (2024)
Record low20° (1988)
Sat, 3152° / 38°0.1
52 °
Donnan, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high52°
Average low38°
Average precipitation0.1 in
Chance of precipitation28%
Record high70° (1968)
Record low23° (1993)
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)
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.