Monthly outlook for Thornton, IA: average high 59.7°, average low 44.9°. That is 1.8° above the climate normal for October. Precipitation is expected on 3 days (about 0.6 inches), against a normal of 4 days and 1.2 inches. The warmest day looks like 22 October (73.3°), the coolest 17 October (33.5°).
59.7°/44.9°
Average high / low
+1.8°
Above normal
3 / 4
Wet days / normal
0.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
15 October – 24 October
62.1°
57.6°
+2.5°
25 October – 3 November
55.7°
53.2°
+1.4°
4 November – 13 November
at normal
47.2°
—
October records over 66 years
86.7°1 October 2023All-time high
16.9°27 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Meservey (5 mi).
Fri, 1650° / 40°0.04
50 °
Thornton, Friday, 16 October
Light rain. High 50°, low 40°.
Pressure30.39 inHg
Wind23.6 mph N
Humidity58%
Visibility6.2 mi
Dew point32°
Sat, 1757° / 34°0
57 °
Thornton, Saturday, 17 October
Clear. High 57°, low 34°.
Pressure30.50 inHg
Wind12.7 mph SW
Humidity45%
Visibility6.2 mi
Dew point30°
Sun, 1862° / 42°0
62 °
Thornton, Sunday, 18 October
Clear. High 62°, low 42°.
Pressure30.30 inHg
Wind13.9 mph SW
Humidity53%
Visibility6.2 mi
Dew point38°
Mon, 1961° / 44°0
61 °
Thornton, Monday, 19 October
Overcast. High 61°, low 44°.
Pressure30.30 inHg
Wind8.8 mph S
Humidity59%
Visibility—
Dew point44°
Tue, 2065° / 43°0
65 °
Thornton, Tuesday, 20 October
Overcast. High 65°, low 43°.
Pressure30.27 inHg
Wind11.8 mph SE
Humidity51%
Visibility—
Dew point42°
Wed, 2163° / 53°0.01
63 °
Thornton, Wednesday, 21 October
Light rain. High 63°, low 53°.
Pressure30.18 inHg
Wind15.3 mph S
Humidity68%
Visibility—
Dew point51°
Thu, 2273° / 62°0.01
73 °
Thornton, Thursday, 22 October
Light rain. High 73°, low 62°.
Pressure30.00 inHg
Wind19.4 mph S
Humidity55%
Visibility—
Dew point53°
Fri, 2371° / 56°0.06
71 °
Thornton, Friday, 23 October
Light rain. High 71°, low 56°.
Pressure29.74 inHg
Wind24.9 mph S
Humidity53%
Visibility—
Dew point52°
Sat, 2462° / 49°0.02
62 °
Thornton, Saturday, 24 October
Light rain. High 62°, low 49°.
Pressure30.21 inHg
Wind13.2 mph NW
Humidity45%
Visibility—
Dew point38°
Sun, 2551° / 42°0.03
51 °
Thornton, Sunday, 25 October
Light rain. High 51°, low 42°.
Pressure30.33 inHg
Wind10.2 mph N
Humidity34%
Visibility—
Dew point22°
Mon, 2655° / 38°0
55 °
Thornton, Monday, 26 October
Mostly clear. High 55°, low 38°.
Pressure30.03 inHg
Wind12.7 mph NW
Humidity48%
Visibility—
Dew point32°
Tue, 2753° / 42°0
53 °
Thornton, Tuesday, 27 October
Clear. High 53°, low 42°.
Pressure30.15 inHg
Wind10.2 mph W
Humidity52%
Visibility—
Dew point34°
Wed, 2860° / 44°0
60 °
Thornton, Wednesday, 28 October
Mostly clear. High 60°, low 44°.
Pressure29.77 inHg
Wind20.4 mph SW
Humidity45%
Visibility—
Dew point35°
Thu, 2955° / 43°0
55 °
Thornton, Thursday, 29 October
Clear. High 55°, low 43°.
Pressure30.06 inHg
Wind14.7 mph NW
Humidity36%
Visibility—
Dew point27°
Fri, 3060° / 42°0
60 °
Thornton, Friday, 30 October
Overcast. High 60°, low 42°.
Pressure29.80 inHg
Wind24 mph S
Humidity49%
Visibility—
Dew point39°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 3153° / 38°0.1
53 °
Thornton, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high53°
Average low38°
Average precipitation0.1 in
Chance of precipitation28%
Record high74° (1968)
Record low20° (1993)
Sun, 0152° / 37°0.11
52 °
Thornton, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high52°
Average low37°
Average precipitation0.11 in
Chance of precipitation25%
Record high71° (2022)
Record low21° (2002)
Mon, 0251° / 36°0.04
51 °
Thornton, Monday, 2 November
Climate normal for this date — 60-year average.
Average high51°
Average low36°
Average precipitation0.04 in
Chance of precipitation15%
Record high72° (2022)
Record low14° (1991)
Tue, 0350° / 36°0.06
50 °
Thornton, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high50°
Average low36°
Average precipitation0.06 in
Chance of precipitation25%
Record high71° (2008)
Record low11° (1991)
Wed, 0450° / 35°0.05
50 °
Thornton, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high50°
Average low35°
Average precipitation0.05 in
Chance of precipitation22%
Record high70° (2008)
Record low5° (1991)
Thu, 0550° / 35°0.07
50 °
Thornton, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high50°
Average low35°
Average precipitation0.07 in
Chance of precipitation23%
Record high70° (2015)
Record low18° (1967)
Fri, 0649° / 35°0.07
49 °
Thornton, Friday, 6 November
Climate normal for this date — 60-year average.
Average high49°
Average low35°
Average precipitation0.07 in
Chance of precipitation22%
Record high70° (2020)
Record low6° (1991)
Sat, 0749° / 33°0.01
49 °
Thornton, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high49°
Average low33°
Average precipitation0.01 in
Chance of precipitation8%
Record high72° (2001)
Record low-8° (1991)
Sun, 0849° / 33°0.04
49 °
Thornton, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high49°
Average low33°
Average precipitation0.04 in
Chance of precipitation17%
Record high75° (1999)
Record low-2° (1991)
Mon, 0948° / 33°0.12
48 °
Thornton, Monday, 9 November
Climate normal for this date — 60-year average.
Average high48°
Average low33°
Average precipitation0.12 in
Chance of precipitation32%
Record high71° (2022)
Record low15° (2018)
Tue, 1045° / 31°0.1
45 °
Thornton, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high45°
Average low31°
Average precipitation0.1 in
Chance of precipitation32%
Record high73° (2012)
Record low9° (2018)
Wed, 1144° / 29°0.07
44 °
Thornton, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high44°
Average low29°
Average precipitation0.07 in
Chance of precipitation25%
Record high67° (1964)
Record low6° (1986)
Thu, 1243° / 28°0.08
43 °
Thornton, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high43°
Average low28°
Average precipitation0.08 in
Chance of precipitation25%
Record high66° (2005)
Record low4° (2019)
Fri, 1344° / 29°0.06
44 °
Thornton, Friday, 13 November
Climate normal for this date — 60-year average.
Average high44°
Average low29°
Average precipitation0.06 in
Chance of precipitation25%
Record high71° (1999)
Record low3° (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 Thornton, 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 Thornton, 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.