Monthly outlook for Olympia Fields, IL: average high 63.9°, average low 48.5°. That is 3.1° above the climate normal for October. Precipitation is expected on 2 days (about 0.6 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 23 October (72.9°), the coolest 17 October (38.8°).
63.9°/48.5°
Average high / low
+3.1°
Above normal
2 / 5
Wet days / normal
0.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
16 October – 25 October
65.8°
59.3°
+3.6°
26 October – 4 November
60.7°
55.7°
+2.8°
5 November – 14 November
at normal
50.5°
—
October records over 66 years
87.3°7 October 2007All-time high
22.5°24 October 1981All-time low
Climate normals and records are computed from the nearest reference point — Arbury Hills (8 mi).
Sat, 1756° / 39°0
56 °
Olympia Fields, Saturday, 17 October
Clear. High 56°, low 39°.
Pressure30.53 inHg
Wind2.6 mph W
Humidity55%
Visibility6.2 mi
Dew point37°
Sun, 1861° / 43°0
61 °
Olympia Fields, Sunday, 18 October
Clear. High 61°, low 43°.
Pressure30.47 inHg
Wind10.8 mph SW
Humidity52%
Visibility6.2 mi
Dew point40°
Mon, 1964° / 43°0
64 °
Olympia Fields, Monday, 19 October
Clear. High 64°, low 43°.
Pressure30.42 inHg
Wind4.2 mph S
Humidity56%
Visibility6.2 mi
Dew point43°
Tue, 2066° / 44°0
66 °
Olympia Fields, Tuesday, 20 October
Clear. High 66°, low 44°.
Pressure30.36 inHg
Wind5 mph E
Humidity49%
Visibility—
Dew point43°
Wed, 2168° / 46°0
68 °
Olympia Fields, Wednesday, 21 October
Clear. High 68°, low 46°.
Pressure30.30 inHg
Wind5.4 mph SE
Humidity46%
Visibility—
Dew point42°
Thu, 2272° / 53°0
72 °
Olympia Fields, Thursday, 22 October
Overcast. High 72°, low 53°.
Pressure30.27 inHg
Wind5.9 mph SE
Humidity33%
Visibility—
Dew point37°
Fri, 2373° / 55°0
73 °
Olympia Fields, Friday, 23 October
Partly cloudy. High 73°, low 55°.
Pressure30.21 inHg
Wind8.4 mph SE
Humidity33%
Visibility—
Dew point39°
Sat, 2469° / 55°0
69 °
Olympia Fields, Saturday, 24 October
Overcast. High 69°, low 55°.
Pressure30.24 inHg
Wind8.3 mph SE
Humidity33%
Visibility—
Dew point36°
Sun, 2572° / 55°0
72 °
Olympia Fields, Sunday, 25 October
Overcast. High 72°, low 55°.
Pressure30.27 inHg
Wind5.2 mph SE
Humidity29%
Visibility—
Dew point35°
Mon, 2665° / 56°0
65 °
Olympia Fields, Monday, 26 October
Overcast. High 65°, low 56°.
Pressure30.09 inHg
Wind11.3 mph SE
Humidity48%
Visibility—
Dew point44°
Tue, 2761° / 52°0
61 °
Olympia Fields, Tuesday, 27 October
Clear. High 61°, low 52°.
Pressure30.00 inHg
Wind11.6 mph S
Humidity57%
Visibility—
Dew point44°
Wed, 2862° / 49°0.58
62 °
Olympia Fields, Wednesday, 28 October
Rain. High 62°, low 49°.
Pressure29.74 inHg
Wind19.3 mph S
Humidity68%
Visibility—
Dew point44°
Thu, 2956° / 51°0
56 °
Olympia Fields, Thursday, 29 October
Overcast. High 56°, low 51°.
Pressure29.83 inHg
Wind10.2 mph W
Humidity85%
Visibility—
Dew point49°
Fri, 3060° / 46°0
60 °
Olympia Fields, Friday, 30 October
Mostly clear. High 60°, low 46°.
Pressure30.00 inHg
Wind12.3 mph W
Humidity39%
Visibility—
Dew point34°
Sat, 3160° / 44°0
60 °
Olympia Fields, Saturday, 31 October
Partly cloudy. High 60°, low 44°.
Pressure30.00 inHg
Wind6 mph SW
Humidity41%
Visibility—
Dew point34°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 0155° / 42°0.17
55 °
Olympia Fields, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high55°
Average low42°
Average precipitation0.17 in
Chance of precipitation42%
Record high75° (2016)
Record low23° (2019)
Mon, 0255° / 41°0.12
55 °
Olympia Fields, Monday, 2 November
Climate normal for this date — 60-year average.
Average high55°
Average low41°
Average precipitation0.12 in
Chance of precipitation40%
Record high75° (1961)
Record low24° (1991)
Tue, 0353° / 39°0.07
53 °
Olympia Fields, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high53°
Average low39°
Average precipitation0.07 in
Chance of precipitation22%
Record high73° (1987)
Record low18° (1991)
Wed, 0453° / 41°0.09
53 °
Olympia Fields, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high53°
Average low41°
Average precipitation0.09 in
Chance of precipitation28%
Record high72° (2015)
Record low18° (1991)
Thu, 0553° / 40°0.12
53 °
Olympia Fields, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high53°
Average low40°
Average precipitation0.12 in
Chance of precipitation30%
Record high76° (1978)
Record low18° (1991)
Fri, 0653° / 38°0.08
53 °
Olympia Fields, Friday, 6 November
Climate normal for this date — 60-year average.
Average high53°
Average low38°
Average precipitation0.08 in
Chance of precipitation35%
Record high72° (1975)
Record low24° (1973)
Sat, 0752° / 38°0.06
52 °
Olympia Fields, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high52°
Average low38°
Average precipitation0.06 in
Chance of precipitation20%
Record high69° (2020)
Record low20° (1991)
Sun, 0852° / 38°0.06
52 °
Olympia Fields, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high52°
Average low38°
Average precipitation0.06 in
Chance of precipitation22%
Record high74° (2020)
Record low13° (1991)
Mon, 0952° / 38°0.14
52 °
Olympia Fields, Monday, 9 November
Climate normal for this date — 60-year average.
Average high52°
Average low38°
Average precipitation0.14 in
Chance of precipitation35%
Record high72° (1999)
Record low17° (1991)
Tue, 1051° / 37°0.14
51 °
Olympia Fields, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high51°
Average low37°
Average precipitation0.14 in
Chance of precipitation33%
Record high72° (2020)
Record low17° (2018)
Wed, 1148° / 35°0.07
48 °
Olympia Fields, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high48°
Average low35°
Average precipitation0.07 in
Chance of precipitation32%
Record high71° (1964)
Record low18° (2019)
Thu, 1247° / 34°0.06
47 °
Olympia Fields, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high47°
Average low34°
Average precipitation0.06 in
Chance of precipitation23%
Record high69° (1964)
Record low6° (2019)
Fri, 1347° / 33°0.06
47 °
Olympia Fields, Friday, 13 November
Climate normal for this date — 60-year average.
Average high47°
Average low33°
Average precipitation0.06 in
Chance of precipitation20%
Record high70° (1999)
Record low3° (2019)
Sat, 1449° / 34°0.08
49 °
Olympia Fields, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high49°
Average low34°
Average precipitation0.08 in
Chance of precipitation37%
Record high71° (1971)
Record low12° (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 Olympia Fields, IL 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 Olympia Fields, IL 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.