Monthly outlook for Emerald Park, IL: average high 61.9°, average low 46.8°. That is 1.5° above the climate normal for October. Precipitation is expected on 5 days (about 1.8 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 12 October (81.1°), the coolest 18 October (30.5°).
61.9°/46.8°
Average high / low
+1.5°
Above normal
5 / 5
Wet days / normal
1.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 October – 18 October
64.9°
60.3°
+2.6°
19 October – 28 October
56.9°
56.3°
+0.3°
29 October – 7 November
at normal
52.3°
—
October records over 66 years
86.9°3 October 2025All-time high
26.1°30 October 1988All-time low
Climate normals and records are computed from the nearest reference point — Round Lake Beach (10 mi).
Sat, 1077° / 60°0
77 °
Emerald Park, Saturday, 10 October
Overcast. High 77°, low 60°.
Pressure30.06 inHg
Wind9.6 mph S
Humidity58%
Visibility6.2 mi
Dew point56°
Sun, 1174° / 55°0
74 °
Emerald Park, Sunday, 11 October
Clear. High 74°, low 55°.
Pressure29.91 inHg
Wind3 mph SE
Humidity69%
Visibility6.2 mi
Dew point59°
Mon, 1281° / 62°0.01
81 °
Emerald Park, Monday, 12 October
Light rain. High 81°, low 62°.
Pressure29.77 inHg
Wind12.2 mph SW
Humidity60%
Visibility6.2 mi
Dew point62°
Tue, 1369° / 59°0.05
69 °
Emerald Park, Tuesday, 13 October
Light rain. High 69°, low 59°.
Pressure29.85 inHg
Wind7.7 mph N
Humidity85%
Visibility6.2 mi
Dew point61°
Wed, 1462° / 53°0
62 °
Emerald Park, Wednesday, 14 October
Overcast. High 62°, low 53°.
Pressure30.09 inHg
Wind10.8 mph E
Humidity70%
Visibility—
Dew point51°
Thu, 1563° / 52°0.29
63 °
Emerald Park, Thursday, 15 October
Rain. High 63°, low 52°.
Pressure30.03 inHg
Wind12.2 mph S
Humidity50%
Visibility—
Dew point42°
Fri, 1663° / 41°0.79
63 °
Emerald Park, Friday, 16 October
Heavy rain. High 63°, low 41°.
Pressure29.77 inHg
Wind25.3 mph W
Humidity55%
Visibility—
Dew point37°
Sat, 1745° / 34°0
45 °
Emerald Park, Saturday, 17 October
Partly cloudy. High 45°, low 34°.
Pressure30.30 inHg
Wind23 mph W
Humidity45%
Visibility—
Dew point23°
Sun, 1848° / 30°0
48 °
Emerald Park, Sunday, 18 October
Overcast. High 48°, low 30°.
Pressure30.33 inHg
Wind11.3 mph S
Humidity44%
Visibility—
Dew point24°
Mon, 1959° / 36°0
59 °
Emerald Park, Monday, 19 October
Overcast. High 59°, low 36°.
Pressure30.18 inHg
Wind12.4 mph SW
Humidity51%
Visibility—
Dew point36°
Tue, 2063° / 42°0
63 °
Emerald Park, Tuesday, 20 October
Clear. High 63°, low 42°.
Pressure30.33 inHg
Wind8.2 mph S
Humidity47%
Visibility—
Dew point39°
Wed, 2164° / 50°0.01
64 °
Emerald Park, Wednesday, 21 October
Light rain. High 64°, low 50°.
Pressure30.21 inHg
Wind13.9 mph SW
Humidity49%
Visibility—
Dew point43°
Thu, 2258° / 52°0.61
58 °
Emerald Park, Thursday, 22 October
Rain. High 58°, low 52°.
Pressure29.94 inHg
Wind15 mph S
Humidity94%
Visibility—
Dew point53°
Fri, 2353° / 39°0.02
53 °
Emerald Park, Friday, 23 October
Light rain. High 53°, low 39°.
Pressure29.94 inHg
Wind19.1 mph W
Humidity72%
Visibility—
Dew point35°
Sat, 2445° / 33°0
45 °
Emerald Park, Saturday, 24 October
Partly cloudy. High 45°, low 33°.
Pressure30.18 inHg
Wind14.4 mph N
Humidity50%
Visibility—
Dew point25°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 2556° / 44°0.1
56 °
Emerald Park, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high56°
Average low44°
Average precipitation0.1 in
Chance of precipitation33%
Record high72° (2012)
Record low30° (1962)
Mon, 2655° / 44°0.13
55 °
Emerald Park, Monday, 26 October
Climate normal for this date — 60-year average.
Average high55°
Average low44°
Average precipitation0.13 in
Chance of precipitation28%
Record high76° (1963)
Record low26° (1962)
Tue, 2755° / 43°0.08
55 °
Emerald Park, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high55°
Average low43°
Average precipitation0.08 in
Chance of precipitation33%
Record high73° (2014)
Record low30° (1980)
Wed, 2854° / 43°0.05
54 °
Emerald Park, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high54°
Average low43°
Average precipitation0.05 in
Chance of precipitation22%
Record high68° (1999)
Record low30° (1976)
Thu, 2954° / 42°0.06
54 °
Emerald Park, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high54°
Average low42°
Average precipitation0.06 in
Chance of precipitation20%
Record high78° (2024)
Record low28° (1988)
Fri, 3056° / 43°0.09
56 °
Emerald Park, Friday, 30 October
Climate normal for this date — 60-year average.
Average high56°
Average low43°
Average precipitation0.09 in
Chance of precipitation30%
Record high76° (2024)
Record low26° (1988)
Sat, 3154° / 43°0.12
54 °
Emerald Park, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high54°
Average low43°
Average precipitation0.12 in
Chance of precipitation42%
Record high71° (1974)
Record low28° (2019)
Sun, 0153° / 42°0.16
53 °
Emerald Park, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high53°
Average low42°
Average precipitation0.16 in
Chance of precipitation45%
Record high71° (2016)
Record low20° (2019)
Mon, 0252° / 41°0.14
52 °
Emerald Park, Monday, 2 November
Climate normal for this date — 60-year average.
Average high52°
Average low41°
Average precipitation0.14 in
Chance of precipitation37%
Record high72° (1961)
Record low23° (1991)
Tue, 0351° / 40°0.06
51 °
Emerald Park, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high51°
Average low40°
Average precipitation0.06 in
Chance of precipitation30%
Record high70° (1987)
Record low17° (1991)
Wed, 0451° / 41°0.1
51 °
Emerald Park, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high51°
Average low41°
Average precipitation0.1 in
Chance of precipitation32%
Record high69° (2022)
Record low15° (1991)
Thu, 0551° / 40°0.12
51 °
Emerald Park, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high51°
Average low40°
Average precipitation0.12 in
Chance of precipitation28%
Record high71° (1978)
Record low20° (1991)
Fri, 0651° / 38°0.09
51 °
Emerald Park, Friday, 6 November
Climate normal for this date — 60-year average.
Average high51°
Average low38°
Average precipitation0.09 in
Chance of precipitation30%
Record high70° (2020)
Record low22° (1991)
Sat, 0750° / 38°0.05
50 °
Emerald Park, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high50°
Average low38°
Average precipitation0.05 in
Chance of precipitation18%
Record high68° (2020)
Record low14° (1991)
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 Emerald Park, 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 Emerald Park, 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.