Monthly outlook for Arlington Heights, OH: average high 66.4°, average low 48.5°. That is 3.7° above the climate normal for October. Precipitation is expected on 2 days (about 0.6 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 30 October (75.7°), the coolest 4 November (39.9°).
66.4°/48.5°
Average high / low
+3.7°
Above normal
2 / 5
Wet days / normal
0.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
23 October – 1 November
70.9°
61.3°
+5.3°
2 November – 11 November
59°
56.6°
+1.4°
12 November – 21 November
at normal
51.8°
—
October records over 66 years
92.1°2 October 2019All-time high
26.2°26 October 1962All-time low
Climate normals and records are computed from the nearest reference point — Golf Manor (2 mi).
Sat, 2471° / 44°0
71 °
Arlington Heights, Saturday, 24 October
Mostly clear. High 71°, low 44°.
Pressure30.42 inHg
Wind2.3 mph E
Humidity53%
Visibility6.2 mi
Dew point46°
Sun, 2572° / 47°0
72 °
Arlington Heights, Sunday, 25 October
Partly cloudy. High 72°, low 47°.
Pressure30.45 inHg
Wind2 mph SE
Humidity55%
Visibility6.2 mi
Dew point48°
Mon, 2673° / 48°0
73 °
Arlington Heights, Monday, 26 October
Overcast. High 73°, low 48°.
Pressure30.36 inHg
Wind0.9 mph S
Humidity45%
Visibility6.2 mi
Dew point44°
Tue, 2771° / 49°0
71 °
Arlington Heights, Tuesday, 27 October
Overcast. High 71°, low 49°.
Pressure30.27 inHg
Wind5.7 mph E
Humidity43%
Visibility—
Dew point44°
Wed, 2873° / 53°0
73 °
Arlington Heights, Wednesday, 28 October
Overcast. High 73°, low 53°.
Pressure30.15 inHg
Wind6 mph SW
Humidity55%
Visibility—
Dew point49°
Thu, 2974° / 54°0
74 °
Arlington Heights, Thursday, 29 October
Partly cloudy. High 74°, low 54°.
Pressure30.27 inHg
Wind7.1 mph SW
Humidity28%
Visibility—
Dew point36°
Fri, 3076° / 55°0
76 °
Arlington Heights, Friday, 30 October
Partly cloudy. High 76°, low 55°.
Pressure30.15 inHg
Wind9.8 mph SW
Humidity41%
Visibility—
Dew point47°
Sat, 3165° / 62°0.28
65 °
Arlington Heights, Saturday, 31 October
Light rain. High 65°, low 62°.
Pressure30.03 inHg
Wind8.3 mph SE
Humidity93%
Visibility—
Dew point60°
Sun, 0165° / 55°0.27
65 °
Arlington Heights, Sunday, 1 November
Rain. High 65°, low 55°.
Pressure29.91 inHg
Wind9.3 mph W
Humidity91%
Visibility—
Dew point61°
Mon, 0254° / 45°0
54 °
Arlington Heights, Monday, 2 November
Light rain. High 54°, low 45°.
Pressure30.09 inHg
Wind11.7 mph W
Humidity61%
Visibility—
Dew point36°
Tue, 0355° / 40°0
55 °
Arlington Heights, Tuesday, 3 November
Clear. High 55°, low 40°.
Pressure30.24 inHg
Wind8 mph W
Humidity36%
Visibility—
Dew point26°
Wed, 0458° / 40°0
58 °
Arlington Heights, Wednesday, 4 November
Clear. High 58°, low 40°.
Pressure30.21 inHg
Wind7.2 mph NW
Humidity36%
Visibility—
Dew point28°
Thu, 0561° / 42°0
61 °
Arlington Heights, Thursday, 5 November
Clear. High 61°, low 42°.
Pressure30.30 inHg
Wind3.8 mph S
Humidity37%
Visibility—
Dew point31°
Fri, 0664° / 44°0
64 °
Arlington Heights, Friday, 6 November
Clear. High 64°, low 44°.
Pressure30.21 inHg
Wind5.4 mph S
Humidity32%
Visibility—
Dew point30°
Sat, 0763° / 50°0
63 °
Arlington Heights, Saturday, 7 November
Overcast. High 63°, low 50°.
Pressure30.06 inHg
Wind6.7 mph E
Humidity44%
Visibility—
Dew point39°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 0856° / 40°0.04
56 °
Arlington Heights, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high56°
Average low40°
Average precipitation0.04 in
Chance of precipitation18%
Record high78° (2023)
Record low22° (2019)
Mon, 0957° / 41°0.11
57 °
Arlington Heights, Monday, 9 November
Climate normal for this date — 60-year average.
Average high57°
Average low41°
Average precipitation0.11 in
Chance of precipitation33%
Record high75° (2020)
Record low22° (1991)
Tue, 1056° / 41°0.17
56 °
Arlington Heights, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high56°
Average low41°
Average precipitation0.17 in
Chance of precipitation35%
Record high76° (2020)
Record low22° (2018)
Wed, 1153° / 39°0.14
53 °
Arlington Heights, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high53°
Average low39°
Average precipitation0.14 in
Chance of precipitation28%
Record high70° (1964)
Record low23° (2025)
Thu, 1252° / 37°0.11
52 °
Arlington Heights, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high52°
Average low37°
Average precipitation0.11 in
Chance of precipitation30%
Record high70° (1985)
Record low11° (2019)
Fri, 1352° / 37°0.07
52 °
Arlington Heights, Friday, 13 November
Climate normal for this date — 60-year average.
Average high52°
Average low37°
Average precipitation0.07 in
Chance of precipitation25%
Record high72° (2010)
Record low6° (2019)
Sat, 1452° / 37°0.07
52 °
Arlington Heights, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high52°
Average low37°
Average precipitation0.07 in
Chance of precipitation23%
Record high73° (2011)
Record low20° (1986)
Sun, 1552° / 38°0.16
52 °
Arlington Heights, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high52°
Average low38°
Average precipitation0.16 in
Chance of precipitation35%
Record high71° (1964)
Record low22° (1969)
Mon, 1652° / 38°0.09
52 °
Arlington Heights, Monday, 16 November
Climate normal for this date — 60-year average.
Average high52°
Average low38°
Average precipitation0.09 in
Chance of precipitation28%
Record high70° (1987)
Record low26° (1967)
Tue, 1752° / 38°0.13
52 °
Arlington Heights, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high52°
Average low38°
Average precipitation0.13 in
Chance of precipitation27%
Record high71° (1971)
Record low18° (2014)
Wed, 1853° / 38°0.1
53 °
Arlington Heights, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high53°
Average low38°
Average precipitation0.1 in
Chance of precipitation27%
Record high74° (2016)
Record low11° (2014)
Thu, 1953° / 38°0.11
53 °
Arlington Heights, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high53°
Average low38°
Average precipitation0.11 in
Chance of precipitation32%
Record high74° (1985)
Record low4° (2014)
Fri, 2052° / 38°0.09
52 °
Arlington Heights, Friday, 20 November
Climate normal for this date — 60-year average.
Average high52°
Average low38°
Average precipitation0.09 in
Chance of precipitation28%
Record high68° (1985)
Record low15° (1984)
Sat, 2149° / 37°0.1
49 °
Arlington Heights, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high49°
Average low37°
Average precipitation0.1 in
Chance of precipitation33%
Record high68° (1979)
Record low16° (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 Arlington Heights, OH 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 Arlington Heights, OH 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.