Monthly outlook for Olympia Fields, IL: average high 67.7°, average low 53.7°. That is 4.3° above the climate normal for October. Precipitation is expected on 7 days (about 1.9 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 12 October (86.3°), the coolest 17 October (40.7°).
67.7°/53.7°
Average high / low
+4.3°
Above normal
7 / 5
Wet days / normal
1.9 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
12 October – 21 October
67.2°
61.1°
+3.4°
22 October – 31 October
68.7°
57.6°
+6.2°
1 November – 10 November
at normal
53°
—
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).
Tue, 1382° / 64°0
82 °
Olympia Fields, Tuesday, 13 October
Clear. High 82°, low 64°.
Pressure29.83 inHg
Wind10.4 mph W
Humidity64%
Visibility6.2 mi
Dew point65°
Wed, 1468° / 59°0.56
68 °
Olympia Fields, Wednesday, 14 October
Heavy rain. High 68°, low 59°.
Pressure30.09 inHg
Wind8.5 mph NE
Humidity72%
Visibility6.2 mi
Dew point59°
Thu, 1561° / 58°0.56
61 °
Olympia Fields, Thursday, 15 October
Heavy rain. High 61°, low 58°.
Pressure30.06 inHg
Wind5.8 mph NE
Humidity95%
Visibility1.2 mi
Dew point59°
Fri, 1658° / 47°0
58 °
Olympia Fields, Friday, 16 October
Overcast. High 58°, low 47°.
Pressure30.30 inHg
Wind16.2 mph NW
Humidity54%
Visibility6.2 mi
Dew point39°
Sat, 1759° / 41°0
59 °
Olympia Fields, Saturday, 17 October
Clear. High 59°, low 41°.
Pressure30.47 inHg
Wind8.2 mph SW
Humidity41%
Visibility—
Dew point32°
Sun, 1861° / 42°0
61 °
Olympia Fields, Sunday, 18 October
Clear. High 61°, low 42°.
Pressure30.30 inHg
Wind14.5 mph SW
Humidity31%
Visibility—
Dew point26°
Mon, 1963° / 49°0.06
63 °
Olympia Fields, Monday, 19 October
Light rain. High 63°, low 49°.
Pressure30.21 inHg
Wind12 mph S
Humidity52%
Visibility—
Dew point43°
Tue, 2062° / 54°0.46
62 °
Olympia Fields, Tuesday, 20 October
Rain. High 62°, low 54°.
Pressure30.24 inHg
Wind5.8 mph NE
Humidity73%
Visibility—
Dew point52°
Wed, 2171° / 58°0.03
71 °
Olympia Fields, Wednesday, 21 October
Light rain. High 71°, low 58°.
Pressure30.30 inHg
Wind9 mph SE
Humidity66%
Visibility—
Dew point56°
Thu, 2275° / 57°0
75 °
Olympia Fields, Thursday, 22 October
Partly cloudy. High 75°, low 57°.
Pressure30.33 inHg
Wind11.2 mph SE
Humidity55%
Visibility—
Dew point53°
Fri, 2374° / 63°0.1
74 °
Olympia Fields, Friday, 23 October
Light rain. High 74°, low 63°.
Pressure30.21 inHg
Wind11.9 mph SW
Humidity65%
Visibility—
Dew point59°
Sat, 2476° / 64°0.11
76 °
Olympia Fields, Saturday, 24 October
Light rain. High 76°, low 64°.
Pressure30.00 inHg
Wind16.3 mph S
Humidity54%
Visibility—
Dew point55°
Sun, 2569° / 50°0.04
69 °
Olympia Fields, Sunday, 25 October
Light rain. High 69°, low 50°.
Pressure29.91 inHg
Wind18.7 mph SW
Humidity70%
Visibility—
Dew point46°
Mon, 2656° / 43°0
56 °
Olympia Fields, Monday, 26 October
Clear. High 56°, low 43°.
Pressure30.15 inHg
Wind13.1 mph NW
Humidity36%
Visibility—
Dew point27°
Tue, 2762° / 48°0
62 °
Olympia Fields, Tuesday, 27 October
Overcast. High 62°, low 48°.
Pressure29.74 inHg
Wind17.2 mph N
Humidity50%
Visibility—
Dew point41°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 2856° / 42°0.06
56 °
Olympia Fields, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high56°
Average low42°
Average precipitation0.06 in
Chance of precipitation20%
Record high74° (1999)
Record low26° (1967)
Thu, 2956° / 42°0.06
56 °
Olympia Fields, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high56°
Average low42°
Average precipitation0.06 in
Chance of precipitation20%
Record high78° (2024)
Record low26° (1980)
Fri, 3058° / 43°0.11
58 °
Olympia Fields, Friday, 30 October
Climate normal for this date — 60-year average.
Average high58°
Average low43°
Average precipitation0.11 in
Chance of precipitation30%
Record high77° (1971)
Record low25° (1980)
Sat, 3157° / 44°0.15
57 °
Olympia Fields, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high57°
Average low44°
Average precipitation0.15 in
Chance of precipitation38%
Record high75° (1974)
Record low27° (2023)
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)
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.