Monthly outlook for Griswold, IA: average high 63.1°, average low 47.5°. That is 2° above the climate normal for October. Precipitation is expected on 5 days (about 1.1 inches), against a normal of 4 days and 1.3 inches. The warmest day looks like 23 October (78.2°), the coolest 17 October (34.5°).
63.1°/47.5°
Average high / low
+2°
Above normal
5 / 4
Wet days / normal
1.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
16 October – 25 October
65.7°
60.8°
+2.7°
26 October – 4 November
58.8°
55.8°
+1.7°
5 November – 14 November
at normal
50.5°
—
October records over 66 years
92.5°5 October 2024All-time high
13.6°27 October 1997All-time low
Climate normals and records are computed from the nearest reference point — Lewis (6 mi).
Sat, 1756° / 34°0
56 °
Griswold, Saturday, 17 October
Clear. High 56°, low 34°.
Pressure30.53 inHg
Wind11.1 mph S
Humidity46%
Visibility6.2 mi
Dew point33°
Sun, 1863° / 42°0
63 °
Griswold, Sunday, 18 October
Clear. High 63°, low 42°.
Pressure30.33 inHg
Wind14.7 mph S
Humidity57%
Visibility6.2 mi
Dew point41°
Mon, 1963° / 47°0
63 °
Griswold, Monday, 19 October
Overcast. High 63°, low 47°.
Pressure30.27 inHg
Wind11.4 mph S
Humidity61%
Visibility6.2 mi
Dew point45°
Tue, 2068° / 48°0.04
68 °
Griswold, Tuesday, 20 October
Light rain. High 68°, low 48°.
Pressure30.24 inHg
Wind12.6 mph S
Humidity50%
Visibility—
Dew point45°
Wed, 2169° / 53°0.05
69 °
Griswold, Wednesday, 21 October
Light rain. High 69°, low 53°.
Pressure30.18 inHg
Wind12.3 mph S
Humidity50%
Visibility—
Dew point47°
Thu, 2275° / 55°0
75 °
Griswold, Thursday, 22 October
Clear. High 75°, low 55°.
Pressure30.09 inHg
Wind8.3 mph S
Humidity60%
Visibility—
Dew point55°
Fri, 2378° / 58°0
78 °
Griswold, Friday, 23 October
Clear. High 78°, low 58°.
Pressure30.00 inHg
Wind16.4 mph S
Humidity57%
Visibility—
Dew point58°
Sat, 2474° / 64°0.03
74 °
Griswold, Saturday, 24 October
Light rain. High 74°, low 64°.
Pressure29.94 inHg
Wind20.3 mph S
Humidity41%
Visibility—
Dew point48°
Sun, 2559° / 52°0.06
59 °
Griswold, Sunday, 25 October
Light rain. High 59°, low 52°.
Pressure30.18 inHg
Wind16.1 mph NE
Humidity66%
Visibility—
Dew point45°
Mon, 2656° / 44°0.61
56 °
Griswold, Monday, 26 October
Rain. High 56°, low 44°.
Pressure29.77 inHg
Wind16.8 mph W
Humidity96%
Visibility—
Dew point53°
Tue, 2760° / 42°0
60 °
Griswold, Tuesday, 27 October
Partly cloudy. High 60°, low 42°.
Pressure29.91 inHg
Wind15.4 mph W
Humidity50%
Visibility—
Dew point37°
Wed, 2865° / 47°0
65 °
Griswold, Wednesday, 28 October
Mostly clear. High 65°, low 47°.
Pressure29.83 inHg
Wind15.5 mph S
Humidity53%
Visibility—
Dew point44°
Thu, 2961° / 56°0.04
61 °
Griswold, Thursday, 29 October
Light rain. High 61°, low 56°.
Pressure29.68 inHg
Wind11.7 mph S
Humidity86%
Visibility—
Dew point55°
Fri, 3058° / 41°0.32
58 °
Griswold, Friday, 30 October
Rain. High 58°, low 41°.
Pressure29.71 inHg
Wind22 mph NW
Humidity76%
Visibility—
Dew point38°
Sat, 3154° / 36°0
54 °
Griswold, Saturday, 31 October
Mostly clear. High 54°, low 36°.
Pressure30.00 inHg
Wind9.3 mph W
Humidity53%
Visibility—
Dew point32°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 0155° / 39°0.16
55 °
Griswold, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high55°
Average low39°
Average precipitation0.16 in
Chance of precipitation32%
Record high76° (1990)
Record low21° (1991)
Mon, 0253° / 38°0.08
53 °
Griswold, Monday, 2 November
Climate normal for this date — 60-year average.
Average high53°
Average low38°
Average precipitation0.08 in
Chance of precipitation23%
Record high74° (1964)
Record low9° (1991)
Tue, 0354° / 38°0.09
54 °
Griswold, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high54°
Average low38°
Average precipitation0.09 in
Chance of precipitation22%
Record high76° (2022)
Record low6° (1991)
Wed, 0453° / 37°0.07
53 °
Griswold, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high53°
Average low37°
Average precipitation0.07 in
Chance of precipitation15%
Record high70° (1978)
Record low1° (1991)
Thu, 0553° / 37°0.05
53 °
Griswold, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high53°
Average low37°
Average precipitation0.05 in
Chance of precipitation22%
Record high72° (2015)
Record low19° (1967)
Fri, 0653° / 37°0.06
53 °
Griswold, Friday, 6 November
Climate normal for this date — 60-year average.
Average high53°
Average low37°
Average precipitation0.06 in
Chance of precipitation17%
Record high73° (1980)
Record low13° (1991)
Sat, 0753° / 36°0.02
53 °
Griswold, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high53°
Average low36°
Average precipitation0.02 in
Chance of precipitation12%
Record high71° (2001)
Record low-3° (1991)
Sun, 0853° / 36°0.04
53 °
Griswold, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high53°
Average low36°
Average precipitation0.04 in
Chance of precipitation18%
Record high77° (1999)
Record low-2° (1991)
Mon, 0952° / 36°0.13
52 °
Griswold, Monday, 9 November
Climate normal for this date — 60-year average.
Average high52°
Average low36°
Average precipitation0.13 in
Chance of precipitation32%
Record high73° (1999)
Record low18° (2018)
Tue, 1049° / 33°0.08
49 °
Griswold, 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 low11° (2018)
Wed, 1148° / 31°0.07
48 °
Griswold, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high48°
Average low31°
Average precipitation0.07 in
Chance of precipitation17%
Record high72° (1964)
Record low7° (1986)
Thu, 1247° / 31°0.07
47 °
Griswold, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high47°
Average low31°
Average precipitation0.07 in
Chance of precipitation23%
Record high71° (2005)
Record low0° (1968)
Fri, 1349° / 32°0.07
49 °
Griswold, Friday, 13 November
Climate normal for this date — 60-year average.
Average high49°
Average low32°
Average precipitation0.07 in
Chance of precipitation18%
Record high77° (1999)
Record low4° (1986)
Sat, 1448° / 33°0.02
48 °
Griswold, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high48°
Average low33°
Average precipitation0.02 in
Chance of precipitation12%
Record high71° (2025)
Record low11° (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 Griswold, 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 Griswold, 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.