As of 03:35 CDT

Weather in Cortland, IL

50°

Cortland, Thursday, 22 October, 03:35

Clear. Feels like 49°. High 74°, low 48°.

Pressure30.21 inHg

Wind0 mph N

Humidity81%

Visibility6.2 mi

Dew point45°

See detailed hourly forecast

Monthly outlook for Cortland, IL: average high 60.9°, average low 46.6°. That is 3.2° above the climate normal for October. Precipitation is expected on 4 days (about 1.4 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 22 October (73.7°), the coolest 3 November (39.5°).

60.9°/46.6°

Average high / low

+3.2°

Above normal

4 / 5

Wet days / normal

1.4 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
22 October – 31 October	64.9°	56.6°	+4.6°
1 November – 10 November	54.2°	51.7°	+1.4°
11 November – 20 November	at normal	46.4°	—

October records over 66 years

87.1°3 October 2025All-time high

22.1°24 October 1981All-time low

Climate normals and records are computed from the nearest reference point — Sycamore (5 mi).

Fri, 2372° / 46°

72 °

Cortland, Friday, 23 October

Overcast. High 72°, low 46°.

Pressure30.33 inHg

Wind8 mph S

Humidity52%

Visibility6.2 mi

Dew point49°

Sat, 2468° / 49°

68 °

Cortland, Saturday, 24 October

Overcast. High 68°, low 49°.

Pressure30.36 inHg

Wind7.7 mph S

Humidity61%

Visibility6.2 mi

Dew point49°

Sun, 2571° / 51°

71 °

Cortland, Sunday, 25 October

Partly cloudy. High 71°, low 51°.

Pressure30.39 inHg

Wind5.7 mph SW

Humidity54%

Visibility6.2 mi

Dew point51°

Mon, 2667° / 50°

67 °

Cortland, Monday, 26 October

Overcast. High 67°, low 50°.

Pressure30.36 inHg

Wind8.9 mph NE

Humidity70%

Visibility—

Dew point55°

Tue, 2764° / 51°

0.05

64 °

Cortland, Tuesday, 27 October

Light rain. High 64°, low 51°.

Pressure30.30 inHg

Wind9 mph NE

Humidity66%

Visibility—

Dew point50°

Wed, 2858° / 48°

58 °

Cortland, Wednesday, 28 October

Overcast. High 58°, low 48°.

Pressure30.18 inHg

Wind5 mph NE

Humidity74%

Visibility—

Dew point48°

Thu, 2957° / 48°

0.11

57 °

Cortland, Thursday, 29 October

Light rain. High 57°, low 48°.

Pressure30.15 inHg

Wind5.7 mph NW

Humidity69%

Visibility—

Dew point46°

Fri, 3060° / 53°

0.26

60 °

Cortland, Friday, 30 October

Rain. High 60°, low 53°.

Pressure29.85 inHg

Wind16.1 mph SE

Humidity88%

Visibility—

Dew point53°

Sat, 3158° / 50°

0.95

58 °

Cortland, Saturday, 31 October

Rain. High 58°, low 50°.

Pressure29.71 inHg

Wind12.4 mph S

Humidity97%

Visibility—

Dew point57°

Sun, 0160° / 47°

60 °

Cortland, Sunday, 1 November

Clear. High 60°, low 47°.

Pressure29.94 inHg

Wind8 mph W

Humidity54%

Visibility—

Dew point41°

Mon, 0254° / 42°

54 °

Cortland, Monday, 2 November

Overcast. High 54°, low 42°.

Pressure30.21 inHg

Wind14.3 mph N

Humidity54%

Visibility—

Dew point36°

Tue, 0354° / 39°

54 °

Cortland, Tuesday, 3 November

Overcast. High 54°, low 39°.

Pressure30.39 inHg

Wind10.3 mph NE

Humidity47%

Visibility—

Dew point32°

Wed, 0452° / 40°

52 °

Cortland, Wednesday, 4 November

Overcast. High 52°, low 40°.

Pressure30.45 inHg

Wind15.8 mph E

Humidity58%

Visibility—

Dew point36°

Thu, 0552° / 42°

52 °

Cortland, Thursday, 5 November

Overcast. High 52°, low 42°.

Pressure30.33 inHg

Wind15.7 mph E

Humidity41%

Visibility—

Dew point27°

Fri, 0654° / 41°

54 °

Cortland, Friday, 6 November

Partly cloudy. High 54°, low 41°.

Pressure30.21 inHg

Wind6.7 mph E

Humidity71%

Visibility—

Dew point43°

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

Sat, 0751° / 37°

0.03

51 °

Cortland, Saturday, 7 November

Climate normal for this date — 60-year average.

Average high51°

Average low37°

Average precipitation0.03 in

Chance of precipitation20%

Record high67° (2009)

Record low13° (1991)

Sun, 0851° / 37°

0.05

51 °

Cortland, Sunday, 8 November

Climate normal for this date — 60-year average.

Average high51°

Average low37°

Average precipitation0.05 in

Chance of precipitation13%

Record high72° (2020)

Record low12° (1991)

Mon, 0951° / 37°

0.12

51 °

Cortland, Monday, 9 November

Climate normal for this date — 60-year average.

Average high51°

Average low37°

Average precipitation0.12 in

Chance of precipitation33%

Record high73° (1999)

Record low17° (1991)

Tue, 1049° / 35°

0.1

49 °

Cortland, Tuesday, 10 November

Climate normal for this date — 60-year average.

Average high49°

Average low35°

Average precipitation0.1 in

Chance of precipitation33%

Record high72° (2022)

Record low15° (2017)

Wed, 1147° / 33°

0.07

47 °

Cortland, Wednesday, 11 November

Climate normal for this date — 60-year average.

Average high47°

Average low33°

Average precipitation0.07 in

Chance of precipitation25%

Record high70° (1964)

Record low13° (2019)

Thu, 1246° / 32°

0.06

46 °

Cortland, Thursday, 12 November

Climate normal for this date — 60-year average.

Average high46°

Average low32°

Average precipitation0.06 in

Chance of precipitation23%

Record high65° (1964)

Record low1° (2019)

Fri, 1346° / 32°

0.04

46 °

Cortland, Friday, 13 November

Climate normal for this date — 60-year average.

Average high46°

Average low32°

Average precipitation0.04 in

Chance of precipitation20%

Record high70° (1999)

Record low1° (2019)

Sat, 1447° / 32°

0.07

47 °

Cortland, Saturday, 14 November

Climate normal for this date — 60-year average.

Average high47°

Average low32°

Average precipitation0.07 in

Chance of precipitation30%

Record high69° (1971)

Record low13° (1986)

Sun, 1546° / 33°

0.08

46 °

Cortland, Sunday, 15 November

Climate normal for this date — 60-year average.

Average high46°

Average low33°

Average precipitation0.08 in

Chance of precipitation23%

Record high69° (2025)

Record low14° (2019)

Mon, 1647° / 33°

0.05

47 °

Cortland, Monday, 16 November

Climate normal for this date — 60-year average.

Average high47°

Average low33°

Average precipitation0.05 in

Chance of precipitation15%

Record high63° (1988)

Record low18° (1997)

Tue, 1747° / 33°

0.1

47 °

Cortland, Tuesday, 17 November

Climate normal for this date — 60-year average.

Average high47°

Average low33°

Average precipitation0.1 in

Chance of precipitation28%

Record high71° (2016)

Record low14° (2014)

Wed, 1847° / 34°

0.1

47 °

Cortland, Wednesday, 18 November

Climate normal for this date — 60-year average.

Average high47°

Average low34°

Average precipitation0.1 in

Chance of precipitation25%

Record high68° (1999)

Record low11° (2014)

Thu, 1946° / 33°

0.07

46 °

Cortland, Thursday, 19 November

Climate normal for this date — 60-year average.

Average high46°

Average low33°

Average precipitation0.07 in

Chance of precipitation28%

Record high64° (1983)

Record low11° (2018)

Fri, 2045° / 32°

0.08

45 °

Cortland, Friday, 20 November

Climate normal for this date — 60-year average.

Average high45°

Average low32°

Average precipitation0.08 in

Chance of precipitation35%

Record high63° (2003)

Record low13° (2022)

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 Cortland, 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 Cortland, 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.