Monthly outlook for Old Peru, IA: average high 63.1°, average low 46°. That is 2.2° above the climate normal for October. Precipitation is expected on 5 days (about 2.8 inches), against a normal of 4 days and 1.6 inches. The warmest day looks like 24 October (74.2°), the coolest 17 October (32.3°).
63.1°/46°
Average high / low
+2.2°
Above normal
5 / 4
Wet days / normal
2.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
17 October – 26 October
65.2°
60.5°
+2.6°
27 October – 5 November
59.6°
55.3°
+2.4°
6 November – 15 November
at normal
50.3°
—
October records over 66 years
92.1°5 October 1963All-time high
10°29 October 1980All-time low
Climate normals and records are computed from the nearest reference point — Thayer (15 mi).
Sun, 1862° / 42°0
62 °
Old Peru, Sunday, 18 October
Clear. High 62°, low 42°.
Pressure30.30 inHg
Wind13.8 mph S
Humidity58%
Visibility6.2 mi
Dew point42°
Mon, 1964° / 46°0
64 °
Old Peru, Monday, 19 October
Overcast. High 64°, low 46°.
Pressure30.30 inHg
Wind9.1 mph S
Humidity62%
Visibility6.2 mi
Dew point47°
Tue, 2066° / 47°0.01
66 °
Old Peru, Tuesday, 20 October
Light rain. High 66°, low 47°.
Pressure30.30 inHg
Wind7.5 mph S
Humidity62%
Visibility6.2 mi
Dew point49°
Wed, 2170° / 51°0
70 °
Old Peru, Wednesday, 21 October
Clear. High 70°, low 51°.
Pressure30.18 inHg
Wind8 mph S
Humidity53%
Visibility—
Dew point48°
Thu, 2273° / 51°0
73 °
Old Peru, Thursday, 22 October
Clear. High 73°, low 51°.
Pressure30.18 inHg
Wind6.7 mph S
Humidity57%
Visibility—
Dew point52°
Fri, 2373° / 59°0
73 °
Old Peru, Friday, 23 October
Overcast. High 73°, low 59°.
Pressure30.00 inHg
Wind17.4 mph S
Humidity46%
Visibility—
Dew point49°
Sat, 2474° / 61°0
74 °
Old Peru, Saturday, 24 October
Overcast. High 74°, low 61°.
Pressure30.00 inHg
Wind17.2 mph S
Humidity38%
Visibility—
Dew point44°
Sun, 2564° / 45°0.44
64 °
Old Peru, Sunday, 25 October
Rain. High 64°, low 45°.
Pressure30.09 inHg
Wind12.8 mph N
Humidity85%
Visibility—
Dew point45°
Mon, 2649° / 37°0
49 °
Old Peru, Monday, 26 October
Clear. High 49°, low 37°.
Pressure30.30 inHg
Wind13.4 mph N
Humidity41%
Visibility—
Dew point24°
Tue, 2752° / 34°0.21
52 °
Old Peru, Tuesday, 27 October
Rain. High 52°, low 34°.
Pressure30.30 inHg
Wind16.4 mph S
Humidity44%
Visibility—
Dew point27°
Wed, 2860° / 48°0.29
60 °
Old Peru, Wednesday, 28 October
Light rain. High 60°, low 48°.
Pressure29.80 inHg
Wind21.5 mph W
Humidity93%
Visibility—
Dew point52°
Thu, 2962° / 47°0
62 °
Old Peru, Thursday, 29 October
Clear. High 62°, low 47°.
Pressure30.12 inHg
Wind26.6 mph W
Humidity46%
Visibility—
Dew point38°
Fri, 3063° / 48°0.31
63 °
Old Peru, Friday, 30 October
Rain. High 63°, low 48°.
Pressure29.80 inHg
Wind19.8 mph S
Humidity63%
Visibility—
Dew point45°
Sat, 3168° / 45°1.53
68 °
Old Peru, Saturday, 31 October
Heavy rain. High 68°, low 45°.
Pressure29.32 inHg
Wind25.7 mph S
Humidity93%
Visibility—
Dew point64°
Sun, 0152° / 42°0
52 °
Old Peru, Sunday, 1 November
Clear. High 52°, low 42°.
Pressure30.00 inHg
Wind18.4 mph NW
Humidity56%
Visibility—
Dew point35°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 0253° / 39°0.09
53 °
Old Peru, Monday, 2 November
Climate normal for this date — 60-year average.
Average high53°
Average low39°
Average precipitation0.09 in
Chance of precipitation30%
Record high76° (1964)
Record low13° (1991)
Tue, 0354° / 39°0.09
54 °
Old Peru, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high54°
Average low39°
Average precipitation0.09 in
Chance of precipitation27%
Record high74° (1978)
Record low9° (1991)
Wed, 0453° / 38°0.1
53 °
Old Peru, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high53°
Average low38°
Average precipitation0.1 in
Chance of precipitation22%
Record high71° (1978)
Record low9° (1991)
Thu, 0553° / 38°0.05
53 °
Old Peru, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high53°
Average low38°
Average precipitation0.05 in
Chance of precipitation22%
Record high73° (2015)
Record low20° (1967)
Fri, 0653° / 37°0.07
53 °
Old Peru, Friday, 6 November
Climate normal for this date — 60-year average.
Average high53°
Average low37°
Average precipitation0.07 in
Chance of precipitation17%
Record high71° (1980)
Record low16° (1991)
Sat, 0753° / 37°0.02
53 °
Old Peru, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high53°
Average low37°
Average precipitation0.02 in
Chance of precipitation8%
Record high72° (1966)
Record low-2° (1991)
Sun, 0853° / 37°0.03
53 °
Old Peru, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high53°
Average low37°
Average precipitation0.03 in
Chance of precipitation20%
Record high75° (1999)
Record low-8° (1991)
Mon, 0953° / 37°0.1
53 °
Old Peru, Monday, 9 November
Climate normal for this date — 60-year average.
Average high53°
Average low37°
Average precipitation0.1 in
Chance of precipitation32%
Record high72° (1999)
Record low14° (1991)
Tue, 1050° / 34°0.09
50 °
Old Peru, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high50°
Average low34°
Average precipitation0.09 in
Chance of precipitation22%
Record high74° (2012)
Record low12° (2018)
Wed, 1148° / 32°0.08
48 °
Old Peru, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high48°
Average low32°
Average precipitation0.08 in
Chance of precipitation22%
Record high73° (1964)
Record low10° (1986)
Thu, 1247° / 32°0.06
47 °
Old Peru, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high47°
Average low32°
Average precipitation0.06 in
Chance of precipitation25%
Record high68° (1999)
Record low3° (2019)
Fri, 1348° / 32°0.07
48 °
Old Peru, Friday, 13 November
Climate normal for this date — 60-year average.
Average high48°
Average low32°
Average precipitation0.07 in
Chance of precipitation20%
Record high75° (1999)
Record low5° (1986)
Sat, 1449° / 34°0.03
49 °
Old Peru, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high49°
Average low34°
Average precipitation0.03 in
Chance of precipitation23%
Record high72° (2025)
Record low13° (2014)
Sun, 1549° / 34°0.05
49 °
Old Peru, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high49°
Average low34°
Average precipitation0.05 in
Chance of precipitation18%
Record high70° (2001)
Record low0° (1972)
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 Old Peru, 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 Old Peru, 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.