Monthly outlook for Marcelline, IL: average high 68.9°, average low 52.4°. That is 3.9° above the climate normal for October. Precipitation is expected on 3 days (about 0.4 inches), against a normal of 4 days and 1.4 inches. The warmest day looks like 28 October (75.7°), the coolest 17 October (39.4°).
68.9°/52.4°
Average high / low
+3.9°
Above normal
3 / 4
Wet days / normal
0.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
15 October – 24 October
67.5°
63.2°
+2.4°
25 October – 3 November
71.2°
58.9°
+6.8°
4 November – 13 November
at normal
53.7°
—
October records over 66 years
90.7°10 October 1963All-time high
26.2°29 October 1980All-time low
Climate normals and records are computed from the nearest reference point — La Grange (9 mi).
Fri, 1655° / 46°0.02
55 °
Marcelline, Friday, 16 October
Light rain. High 55°, low 46°.
Pressure30.24 inHg
Wind18.9 mph NW
Humidity61%
Visibility6.2 mi
Dew point41°
Sat, 1757° / 39°0
57 °
Marcelline, Saturday, 17 October
Clear. High 57°, low 39°.
Pressure30.59 inHg
Wind1.2 mph S
Humidity45%
Visibility6.2 mi
Dew point32°
Sun, 1863° / 43°0
63 °
Marcelline, Sunday, 18 October
Clear. High 63°, low 43°.
Pressure30.45 inHg
Wind11.4 mph S
Humidity50%
Visibility6.2 mi
Dew point41°
Mon, 1966° / 44°0
66 °
Marcelline, Monday, 19 October
Partly cloudy. High 66°, low 44°.
Pressure30.36 inHg
Wind6.1 mph S
Humidity52%
Visibility6.2 mi
Dew point43°
Tue, 2070° / 47°0
70 °
Marcelline, Tuesday, 20 October
Clear. High 70°, low 47°.
Pressure30.30 inHg
Wind6.2 mph S
Humidity44%
Visibility—
Dew point43°
Wed, 2172° / 51°0
72 °
Marcelline, Wednesday, 21 October
Partly cloudy. High 72°, low 51°.
Pressure30.30 inHg
Wind7.7 mph SE
Humidity42%
Visibility—
Dew point44°
Thu, 2273° / 56°0
73 °
Marcelline, Thursday, 22 October
Overcast. High 73°, low 56°.
Pressure30.21 inHg
Wind10.1 mph S
Humidity39%
Visibility—
Dew point44°
Fri, 2373° / 61°0
73 °
Marcelline, Friday, 23 October
Overcast. High 73°, low 61°.
Pressure30.12 inHg
Wind13.4 mph S
Humidity42%
Visibility—
Dew point44°
Sat, 2476° / 60°0.04
76 °
Marcelline, Saturday, 24 October
Light rain. High 76°, low 60°.
Pressure30.15 inHg
Wind14.4 mph S
Humidity50%
Visibility—
Dew point53°
Sun, 2571° / 54°0
71 °
Marcelline, Sunday, 25 October
Clear. High 71°, low 54°.
Pressure30.42 inHg
Wind9.8 mph NE
Humidity41%
Visibility—
Dew point44°
Mon, 2675° / 56°0
75 °
Marcelline, Monday, 26 October
Overcast. High 75°, low 56°.
Pressure30.39 inHg
Wind11.3 mph E
Humidity46%
Visibility—
Dew point49°
Tue, 2771° / 59°0
71 °
Marcelline, Tuesday, 27 October
Overcast. High 71°, low 59°.
Pressure30.21 inHg
Wind11.8 mph S
Humidity36%
Visibility—
Dew point41°
Wed, 2876° / 61°0
76 °
Marcelline, Wednesday, 28 October
Overcast. High 76°, low 61°.
Pressure30.21 inHg
Wind12.4 mph S
Humidity45%
Visibility—
Dew point42°
Thu, 2974° / 58°0.11
74 °
Marcelline, Thursday, 29 October
Light rain. High 74°, low 58°.
Pressure30.03 inHg
Wind16.3 mph SW
Humidity52%
Visibility—
Dew point53°
Fri, 3060° / 48°0.04
60 °
Marcelline, Friday, 30 October
Light rain. High 60°, low 48°.
Pressure30.33 inHg
Wind10.9 mph N
Humidity38%
Visibility—
Dew point30°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 3159° / 45°0.19
59 °
Marcelline, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high59°
Average low45°
Average precipitation0.19 in
Chance of precipitation42%
Record high77° (1968)
Record low27° (1993)
Sun, 0159° / 44°0.2
59 °
Marcelline, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high59°
Average low44°
Average precipitation0.2 in
Chance of precipitation30%
Record high78° (2000)
Record low25° (1993)
Mon, 0257° / 42°0.1
57 °
Marcelline, Monday, 2 November
Climate normal for this date — 60-year average.
Average high57°
Average low42°
Average precipitation0.1 in
Chance of precipitation32%
Record high76° (1964)
Record low24° (1991)
Tue, 0356° / 42°0.14
56 °
Marcelline, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high56°
Average low42°
Average precipitation0.14 in
Chance of precipitation30%
Record high75° (1987)
Record low17° (1991)
Wed, 0456° / 42°0.1
56 °
Marcelline, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high56°
Average low42°
Average precipitation0.1 in
Chance of precipitation28%
Record high75° (1978)
Record low15° (1991)
Thu, 0555° / 41°0.1
55 °
Marcelline, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high55°
Average low41°
Average precipitation0.1 in
Chance of precipitation28%
Record high73° (1978)
Record low23° (1991)
Fri, 0655° / 40°0.09
55 °
Marcelline, Friday, 6 November
Climate normal for this date — 60-year average.
Average high55°
Average low40°
Average precipitation0.09 in
Chance of precipitation23%
Record high73° (2020)
Record low24° (1991)
Sat, 0755° / 40°0.02
55 °
Marcelline, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high55°
Average low40°
Average precipitation0.02 in
Chance of precipitation13%
Record high73° (1966)
Record low10° (1991)
Sun, 0855° / 40°0.06
55 °
Marcelline, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high55°
Average low40°
Average precipitation0.06 in
Chance of precipitation20%
Record high77° (1999)
Record low-4° (1991)
Mon, 0956° / 41°0.12
56 °
Marcelline, Monday, 9 November
Climate normal for this date — 60-year average.
Average high56°
Average low41°
Average precipitation0.12 in
Chance of precipitation30%
Record high76° (2022)
Record low5° (1991)
Tue, 1053° / 38°0.13
53 °
Marcelline, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high53°
Average low38°
Average precipitation0.13 in
Chance of precipitation32%
Record high75° (2022)
Record low17° (1991)
Wed, 1151° / 36°0.07
51 °
Marcelline, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high51°
Average low36°
Average precipitation0.07 in
Chance of precipitation27%
Record high75° (1964)
Record low18° (2019)
Thu, 1250° / 35°0.06
50 °
Marcelline, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high50°
Average low35°
Average precipitation0.06 in
Chance of precipitation25%
Record high70° (1999)
Record low9° (2019)
Fri, 1351° / 35°0.05
51 °
Marcelline, Friday, 13 November
Climate normal for this date — 60-year average.
Average high51°
Average low35°
Average precipitation0.05 in
Chance of precipitation13%
Record high75° (1999)
Record low10° (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 Marcelline, 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 Marcelline, 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.