Monthly outlook for Vandalia, IA: average high 63.4°, average low 49°. That is 3.1° above the climate normal for October. Precipitation is expected on 4 days (about 1.5 inches), against a normal of 4 days and 1.6 inches. The warmest day looks like 24 October (74.3°), the coolest 2 November (35.3°).
63.4°/49°
Average high / low
+3.1°
Above normal
4 / 4
Wet days / normal
1.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
18 October – 27 October
66.8°
59.3°
+4.2°
28 October – 6 November
57.6°
54.2°
+1.9°
7 November – 16 November
at normal
48.9°
—
October records over 66 years
89.2°6 October 1963All-time high
9.7°29 October 1980All-time low
Climate normals and records are computed from the nearest reference point — Mitchellville (9 mi).
Mon, 1967° / 42°0
67 °
Vandalia, Monday, 19 October
Overcast. High 67°, low 42°.
Pressure30.33 inHg
Wind5.3 mph S
Humidity60%
Visibility6.2 mi
Dew point47°
Tue, 2067° / 43°0
67 °
Vandalia, Tuesday, 20 October
Clear. High 67°, low 43°.
Pressure30.33 inHg
Wind5.6 mph SE
Humidity58%
Visibility6.2 mi
Dew point48°
Wed, 2170° / 48°0
70 °
Vandalia, Wednesday, 21 October
Clear. High 70°, low 48°.
Pressure30.27 inHg
Wind3.4 mph S
Humidity63%
Visibility6.2 mi
Dew point52°
Thu, 2270° / 49°0
70 °
Vandalia, Thursday, 22 October
Clear. High 70°, low 49°.
Pressure30.27 inHg
Wind6.6 mph SE
Humidity61%
Visibility6.2 mi
Dew point52°
Fri, 2369° / 53°0
69 °
Vandalia, Friday, 23 October
Overcast. High 69°, low 53°.
Pressure30.18 inHg
Wind14.5 mph SE
Humidity62%
Visibility—
Dew point50°
Sat, 2474° / 57°0.01
74 °
Vandalia, Saturday, 24 October
Light rain. High 74°, low 57°.
Pressure30.18 inHg
Wind16.8 mph SW
Humidity47%
Visibility—
Dew point49°
Sun, 2563° / 54°0
63 °
Vandalia, Sunday, 25 October
Overcast. High 63°, low 54°.
Pressure30.39 inHg
Wind10.4 mph NW
Humidity38%
Visibility—
Dew point35°
Mon, 2663° / 53°0
63 °
Vandalia, Monday, 26 October
Overcast. High 63°, low 53°.
Pressure30.30 inHg
Wind11.7 mph E
Humidity57%
Visibility—
Dew point44°
Tue, 2758° / 54°0.01
58 °
Vandalia, Tuesday, 27 October
Light rain. High 58°, low 54°.
Pressure30.24 inHg
Wind7.3 mph E
Humidity72%
Visibility—
Dew point49°
Wed, 2860° / 56°0.15
60 °
Vandalia, Wednesday, 28 October
Light rain. High 60°, low 56°.
Pressure30.15 inHg
Wind11 mph S
Humidity82%
Visibility—
Dew point54°
Thu, 2964° / 56°0.16
64 °
Vandalia, Thursday, 29 October
Light rain. High 64°, low 56°.
Pressure29.91 inHg
Wind14.2 mph SW
Humidity72%
Visibility—
Dew point54°
Fri, 3062° / 48°0.04
62 °
Vandalia, Friday, 30 October
Light rain. High 62°, low 48°.
Pressure30.00 inHg
Wind13.9 mph NW
Humidity49%
Visibility—
Dew point38°
Sat, 3157° / 44°0
57 °
Vandalia, Saturday, 31 October
Overcast. High 57°, low 44°.
Pressure30.12 inHg
Wind6.7 mph SE
Humidity50%
Visibility—
Dew point37°
Sun, 0153° / 50°0.69
53 °
Vandalia, Sunday, 1 November
Rain. High 53°, low 50°.
Pressure29.85 inHg
Wind15.7 mph N
Humidity92%
Visibility—
Dew point50°
Mon, 0248° / 35°0.46
48 °
Vandalia, Monday, 2 November
Rain. High 48°, low 35°.
Pressure30.33 inHg
Wind19.3 mph N
Humidity65%
Visibility—
Dew point31°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 0353° / 38°0.07
53 °
Vandalia, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high53°
Average low38°
Average precipitation0.07 in
Chance of precipitation17%
Record high73° (1978)
Record low10° (1991)
Wed, 0453° / 38°0.12
53 °
Vandalia, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high53°
Average low38°
Average precipitation0.12 in
Chance of precipitation22%
Record high70° (2020)
Record low7° (1991)
Thu, 0552° / 37°0.06
52 °
Vandalia, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high52°
Average low37°
Average precipitation0.06 in
Chance of precipitation25%
Record high72° (2015)
Record low20° (1967)
Fri, 0653° / 37°0.06
53 °
Vandalia, Friday, 6 November
Climate normal for this date — 60-year average.
Average high53°
Average low37°
Average precipitation0.06 in
Chance of precipitation17%
Record high71° (2020)
Record low15° (1991)
Sat, 0752° / 36°0.02
52 °
Vandalia, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high52°
Average low36°
Average precipitation0.02 in
Chance of precipitation8%
Record high72° (2001)
Record low0° (1991)
Sun, 0851° / 36°0.04
51 °
Vandalia, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high51°
Average low36°
Average precipitation0.04 in
Chance of precipitation20%
Record high76° (1999)
Record low-1° (1991)
Mon, 0951° / 36°0.09
51 °
Vandalia, Monday, 9 November
Climate normal for this date — 60-year average.
Average high51°
Average low36°
Average precipitation0.09 in
Chance of precipitation32%
Record high73° (1999)
Record low13° (1991)
Tue, 1049° / 33°0.08
49 °
Vandalia, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high49°
Average low33°
Average precipitation0.08 in
Chance of precipitation28%
Record high74° (2012)
Record low14° (2018)
Wed, 1148° / 32°0.09
48 °
Vandalia, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high48°
Average low32°
Average precipitation0.09 in
Chance of precipitation20%
Record high71° (1964)
Record low10° (2019)
Thu, 1246° / 31°0.06
46 °
Vandalia, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high46°
Average low31°
Average precipitation0.06 in
Chance of precipitation27%
Record high67° (2005)
Record low0° (2019)
Fri, 1348° / 31°0.07
48 °
Vandalia, Friday, 13 November
Climate normal for this date — 60-year average.
Average high48°
Average low31°
Average precipitation0.07 in
Chance of precipitation23%
Record high76° (1999)
Record low6° (1986)
Sat, 1447° / 32°0.03
47 °
Vandalia, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high47°
Average low32°
Average precipitation0.03 in
Chance of precipitation18%
Record high72° (2025)
Record low15° (1986)
Sun, 1548° / 33°0.06
48 °
Vandalia, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high48°
Average low33°
Average precipitation0.06 in
Chance of precipitation23%
Record high70° (2001)
Record low4° (1972)
Mon, 1648° / 32°0.05
48 °
Vandalia, Monday, 16 November
Climate normal for this date — 60-year average.
Average high48°
Average low32°
Average precipitation0.05 in
Chance of precipitation22%
Record high70° (2001)
Record low14° (1997)
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 Vandalia, 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 Vandalia, 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.