As of 20:34 CDT

Weather in Third Lake, IL

79°Current weather

Third Lake, Monday, 12 October, 20:34

Partly cloudy. Feels like 79°. High 86°, low 61°.

Pressure29.71 inHg
Wind12.7 mph SW
Humidity60%
Visibility6.2 mi
Dew point64°

Monthly outlook for Third Lake, IL: average high 63.1°, average low 50.1°. That is 2.9° above the climate normal for October. Precipitation is expected on 6 days (about 1.8 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 12 October (86.2°), the coolest 25 October (38.1°).

63.1°/50.1°
Average high / low
+2.9°
Above normal
6 / 5
Wet days / normal
1.8 in
Precipitation this month

Ten-day blocks vs climate normal

PeriodForecast highNormalDifference
12 October – 21 October65.1°58.9°+3.4°
22 October – 31 October59.8°55.3°+2.5°
1 November – 10 Novemberat normal50.8°—

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 (4 mi).

Tue, 1379° / 65°0.16Rain
79 °Rain

Third Lake, Tuesday, 13 October

Rain. High 79°, low 65°.

Pressure29.83 inHg
Wind9.3 mph W
Humidity67%
Visibility6.2 mi
Dew point60°
Wed, 1473° / 57°0.07Rain
73 °Rain

Third Lake, Wednesday, 14 October

Rain. High 73°, low 57°.

Pressure30.09 inHg
Wind8 mph NE
Humidity64%
Visibility6.2 mi
Dew point55°
Thu, 1559° / 55°0.86Heavy rain
59 °Heavy rain

Third Lake, Thursday, 15 October

Heavy rain. High 59°, low 55°.

Pressure30.09 inHg
Wind9.4 mph E
Humidity88%
Visibility5.4 mi
Dew point55°
Fri, 1655° / 46°0.04Light rain
55 °Light rain

Third Lake, Friday, 16 October

Light rain. High 55°, low 46°.

Pressure30.15 inHg
Wind22.6 mph NW
Humidity60%
Visibility6.2 mi
Dew point39°
Sat, 1757° / 41°0Clear
57 °Clear

Third Lake, Saturday, 17 October

Clear. High 57°, low 41°.

Pressure30.45 inHg
Wind12.1 mph SW
Humidity43%
Visibility—
Dew point31°
Sun, 1860° / 47°0Overcast
60 °Overcast

Third Lake, Sunday, 18 October

Overcast. High 60°, low 47°.

Pressure30.21 inHg
Wind15.4 mph SW
Humidity51%
Visibility—
Dew point40°
Mon, 1957° / 45°0.02Light rain
57 °Light rain

Third Lake, Monday, 19 October

Light rain. High 57°, low 45°.

Pressure30.24 inHg
Wind8.6 mph SW
Humidity55%
Visibility—
Dew point39°
Tue, 2058° / 52°0.36Rain
58 °Rain

Third Lake, Tuesday, 20 October

Rain. High 58°, low 52°.

Pressure30.21 inHg
Wind12.2 mph SE
Humidity93%
Visibility—
Dew point55°
Wed, 2166° / 56°0.04Light rain
66 °Light rain

Third Lake, Wednesday, 21 October

Light rain. High 66°, low 56°.

Pressure30.21 inHg
Wind10.6 mph S
Humidity78%
Visibility—
Dew point57°
Thu, 2272° / 60°0Overcast
72 °Overcast

Third Lake, Thursday, 22 October

Overcast. High 72°, low 60°.

Pressure30.00 inHg
Wind20.4 mph S
Humidity64%
Visibility—
Dew point56°
Fri, 2369° / 51°0.21Rain
69 °Rain

Third Lake, Friday, 23 October

Rain. High 69°, low 51°.

Pressure29.97 inHg
Wind24.5 mph S
Humidity58%
Visibility—
Dew point46°
Sat, 2455° / 44°0Mostly clear
55 °Mostly clear

Third Lake, Saturday, 24 October

Mostly clear. High 55°, low 44°.

Pressure30.30 inHg
Wind14.3 mph NW
Humidity42%
Visibility—
Dew point31°
Sun, 2551° / 38°0Partly cloudy
51 °Partly cloudy

Third Lake, Sunday, 25 October

Partly cloudy. High 51°, low 38°.

Pressure30.30 inHg
Wind8.6 mph NW
Humidity48%
Visibility—
Dew point30°
Mon, 2654° / 41°0Light rain
54 °Light rain

Third Lake, Monday, 26 October

Light rain. High 54°, low 41°.

Pressure30.03 inHg
Wind10.1 mph W
Humidity49%
Visibility—
Dew point33°
Tue, 2757° / 44°0.06Light rain
57 °Light rain

Third Lake, Tuesday, 27 October

Light rain. High 57°, low 44°.

Pressure29.53 inHg
Wind17 mph NW
Humidity59%
Visibility—
Dew point41°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 2854° / 43°0.05Climate normal
54 °Climate normal

Third Lake, 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°0.06Climate normal
54 °Climate normal

Third Lake, 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°0.09Climate normal
56 °Climate normal

Third Lake, 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°0.12Climate normal
54 °Climate normal

Third Lake, 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°0.16Climate normal
53 °Climate normal

Third Lake, 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°0.14Climate normal
52 °Climate normal

Third Lake, 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°0.06Climate normal
51 °Climate normal

Third Lake, 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°0.1Climate normal
51 °Climate normal

Third Lake, 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°0.12Climate normal
51 °Climate normal

Third Lake, 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°0.09Climate normal
51 °Climate normal

Third Lake, 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°0.05Climate normal
50 °Climate normal

Third Lake, 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)
Sun, 0850° / 38°0.04Climate normal
50 °Climate normal

Third Lake, Sunday, 8 November

Climate normal for this date — 60-year average.

Average high50°
Average low38°
Average precipitation0.04 in
Chance of precipitation18%
Record high73° (2020)
Record low15° (1991)
Mon, 0950° / 38°0.11Climate normal
50 °Climate normal

Third Lake, Monday, 9 November

Climate normal for this date — 60-year average.

Average high50°
Average low38°
Average precipitation0.11 in
Chance of precipitation33%
Record high73° (2020)
Record low20° (1991)
Tue, 1049° / 37°0.11Climate normal
49 °Climate normal

Third Lake, Tuesday, 10 November

Climate normal for this date — 60-year average.

Average high49°
Average low37°
Average precipitation0.11 in
Chance of precipitation38%
Record high72° (2022)
Record low16° (2017)

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 Third Lake, 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 Third Lake, 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.