As of 03:15 CDT

Weather in Marine, IL

39°

Marine, Sunday, 18 October, 03:15

Clear. Feels like 35°. High 66°, low 39°.

Pressure30.45 inHg

Wind4.9 mph SE

Humidity96%

Visibility6.2 mi

Dew point37°

See detailed hourly forecast

Monthly outlook for Marine, IL: average high 69.8°, average low 51.1°. That is 3.9° above the climate normal for October. Precipitation is expected on 3 days (about 1.7 inches), against a normal of 5 days and 1.9 inches. The warmest day looks like 24 October (78.7°), the coolest 18 October (38.6°).

69.8°/51.1°

Average high / low

+3.9°

Above normal

3 / 5

Wet days / normal

1.7 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
18 October – 27 October	69.3°	63.7°	+3.1°
28 October – 6 November	70.6°	59.8°	+6°
7 November – 16 November	at normal	54.8°	—

October records over 66 years

91.4°1 October 2019All-time high

28.6°24 October 1981All-time low

Climate normals and records are computed from the nearest reference point — Edwardsville (11 mi).

Mon, 1970° / 44°

70 °

Marine, Monday, 19 October

Clear. High 70°, low 44°.

Pressure30.39 inHg

Wind2.8 mph S

Humidity48%

Visibility6.2 mi

Dew point44°

Tue, 2069° / 45°

69 °

Marine, Tuesday, 20 October

Light rain. High 69°, low 45°.

Pressure30.36 inHg

Wind1.5 mph SE

Humidity49%

Visibility6.2 mi

Dew point47°

Wed, 2171° / 47°

71 °

Marine, Wednesday, 21 October

Clear. High 71°, low 47°.

Pressure30.30 inHg

Wind1.5 mph SW

Humidity46%

Visibility6.2 mi

Dew point47°

Thu, 2273° / 49°

73 °

Marine, Thursday, 22 October

Clear. High 73°, low 49°.

Pressure30.27 inHg

Wind5.1 mph NE

Humidity41%

Visibility—

Dew point44°

Fri, 2370° / 52°

70 °

Marine, Friday, 23 October

Clear. High 70°, low 52°.

Pressure30.27 inHg

Wind8.2 mph E

Humidity50%

Visibility—

Dew point47°

Sat, 2479° / 55°

79 °

Marine, Saturday, 24 October

Overcast. High 79°, low 55°.

Pressure30.27 inHg

Wind11.7 mph S

Humidity23%

Visibility—

Dew point33°

Sun, 2564° / 53°

64 °

Marine, Sunday, 25 October

Overcast. High 64°, low 53°.

Pressure30.45 inHg

Wind12.8 mph N

Humidity56%

Visibility—

Dew point43°

Mon, 2660° / 45°

60 °

Marine, Monday, 26 October

Overcast. High 60°, low 45°.

Pressure30.36 inHg

Wind8.7 mph E

Humidity34%

Visibility—

Dew point28°

Tue, 2771° / 54°

71 °

Marine, Tuesday, 27 October

Overcast. High 71°, low 54°.

Pressure30.18 inHg

Wind7.3 mph SW

Humidity41%

Visibility—

Dew point44°

Wed, 2874° / 59°

74 °

Marine, Wednesday, 28 October

Overcast. High 74°, low 59°.

Pressure30.00 inHg

Wind11 mph S

Humidity40%

Visibility—

Dew point46°

Thu, 2964° / 59°

0.11

64 °

Marine, Thursday, 29 October

Light rain. High 64°, low 59°.

Pressure29.80 inHg

Wind8.2 mph S

Humidity83%

Visibility—

Dew point58°

Fri, 3076° / 56°

76 °

Marine, Friday, 30 October

Mostly clear. High 76°, low 56°.

Pressure29.83 inHg

Wind10.2 mph SW

Humidity50%

Visibility—

Dew point51°

Sat, 3171° / 56°

1.43

71 °

Marine, Saturday, 31 October

Heavy rain. High 71°, low 56°.

Pressure29.94 inHg

Wind13.2 mph SE

Humidity68%

Visibility—

Dew point58°

Sun, 0170° / 56°

0.16

70 °

Marine, Sunday, 1 November

Light rain. High 70°, low 56°.

Pressure29.94 inHg

Wind19.8 mph SW

Humidity34%

Visibility—

Dew point40°

Mon, 0269° / 50°

69 °

Marine, Monday, 2 November

Clear. High 69°, low 50°.

Pressure30.09 inHg

Wind9.9 mph SE

Humidity36%

Visibility—

Dew point39°

From day 17 onward the outlook is built from 60-year climate statistics

Tue, 0358° / 44°

0.11

58 °

Marine, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high58°

Average low44°

Average precipitation0.11 in

Chance of precipitation30%

Record high78° (1987)

Record low20° (1991)

Wed, 0457° / 45°

0.16

57 °

Marine, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high57°

Average low45°

Average precipitation0.16 in

Chance of precipitation28%

Record high76° (2022)

Record low20° (1991)

Thu, 0558° / 43°

0.16

58 °

Marine, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high58°

Average low43°

Average precipitation0.16 in

Chance of precipitation30%

Record high76° (1978)

Record low24° (1991)

Fri, 0657° / 42°

0.09

57 °

Marine, Friday, 6 November

Climate normal for this date — 60-year average.

Average high57°

Average low42°

Average precipitation0.09 in

Chance of precipitation33%

Record high77° (2023)

Record low28° (1982)

Sat, 0757° / 42°

0.08

57 °

Marine, Saturday, 7 November

Climate normal for this date — 60-year average.

Average high57°

Average low42°

Average precipitation0.08 in

Chance of precipitation22%

Record high74° (1980)

Record low17° (1991)

Sun, 0857° / 42°

0.04

57 °

Marine, Sunday, 8 November

Climate normal for this date — 60-year average.

Average high57°

Average low42°

Average precipitation0.04 in

Chance of precipitation17%

Record high80° (2023)

Record low4° (1991)

Mon, 0958° / 43°

0.1

58 °

Marine, Monday, 9 November

Climate normal for this date — 60-year average.

Average high58°

Average low43°

Average precipitation0.1 in

Chance of precipitation30%

Record high76° (2022)

Record low8° (1991)

Tue, 1056° / 41°

0.13

56 °

Marine, Tuesday, 10 November

Climate normal for this date — 60-year average.

Average high56°

Average low41°

Average precipitation0.13 in

Chance of precipitation30%

Record high74° (2020)

Record low20° (2018)

Wed, 1154° / 39°

0.11

54 °

Marine, Wednesday, 11 November

Climate normal for this date — 60-year average.

Average high54°

Average low39°

Average precipitation0.11 in

Chance of precipitation27%

Record high74° (1989)

Record low23° (2019)

Thu, 1252° / 37°

0.09

52 °

Marine, Thursday, 12 November

Climate normal for this date — 60-year average.

Average high52°

Average low37°

Average precipitation0.09 in

Chance of precipitation25%

Record high72° (2010)

Record low12° (2019)

Fri, 1353° / 38°

0.06

53 °

Marine, Friday, 13 November

Climate normal for this date — 60-year average.

Average high53°

Average low38°

Average precipitation0.06 in

Chance of precipitation22%

Record high77° (1999)

Record low11° (1986)

Sat, 1454° / 39°

0.1

54 °

Marine, Saturday, 14 November

Climate normal for this date — 60-year average.

Average high54°

Average low39°

Average precipitation0.1 in

Chance of precipitation28%

Record high77° (1971)

Record low16° (1986)

Sun, 1554° / 39°

0.13

54 °

Marine, Sunday, 15 November

Climate normal for this date — 60-year average.

Average high54°

Average low39°

Average precipitation0.13 in

Chance of precipitation32%

Record high76° (2025)

Record low22° (2019)

Mon, 1653° / 38°

0.11

53 °

Marine, Monday, 16 November

Climate normal for this date — 60-year average.

Average high53°

Average low38°

Average precipitation0.11 in

Chance of precipitation23%

Record high71° (2001)

Record low24° (1997)

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 Marine, 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 Marine, 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.