As of 05:52 CDT

Weather in Oswego, IL

71°Current weather

Oswego, Tuesday, 13 October, 05:52

Clear. Feels like 71°. High 82°, low 66°.

Pressure29.77 inHg
Wind11.5 mph SW
Humidity71%
Visibility6.2 mi
Dew point61°

Monthly outlook for Oswego, IL: average high 62.8°, average low 49.9°. That is 2° above the climate normal for October. Precipitation is expected on 6 days (about 2.3 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 13 October (82.2°), the coolest 17 October (38°).

62.8°/49.9°
Average high / low
+2°
Above normal
6 / 5
Wet days / normal
2.3 in
Precipitation this month

Ten-day blocks vs climate normal

PeriodForecast highNormalDifference
13 October – 22 October66°60.5°+3°
23 October – 1 November57.4°56.8°+0.3°
2 November – 11 Novemberat normal51.9°—

October records over 66 years

87.6°3 October 2025All-time high
21.9°24 October 1981All-time low

Climate normals and records are computed from the nearest reference point — Boulder Hill (2 mi).

Wed, 1476° / 59°0.36Heavy rain
76 °Heavy rain

Oswego, Wednesday, 14 October

Heavy rain. High 76°, low 59°.

Pressure30.06 inHg
Wind7.2 mph NE
Humidity67%
Visibility6.2 mi
Dew point59°
Thu, 1562° / 57°1.49Heavy rain
62 °Heavy rain

Oswego, Thursday, 15 October

Heavy rain. High 62°, low 57°.

Pressure30.03 inHg
Wind5.9 mph NE
Humidity97%
Visibility1.2 mi
Dew point59°
Fri, 1658° / 47°0.02Light rain
58 °Light rain

Oswego, Friday, 16 October

Light rain. High 58°, low 47°.

Pressure30.15 inHg
Wind22.4 mph NW
Humidity54%
Visibility6.2 mi
Dew point38°
Sat, 1757° / 38°0Clear
57 °Clear

Oswego, Saturday, 17 October

Clear. High 57°, low 38°.

Pressure30.50 inHg
Wind8.7 mph SW
Humidity41%
Visibility—
Dew point30°
Sun, 1862° / 45°0Partly cloudy
62 °Partly cloudy

Oswego, Sunday, 18 October

Partly cloudy. High 62°, low 45°.

Pressure30.27 inHg
Wind13 mph SW
Humidity50%
Visibility—
Dew point40°
Mon, 1953° / 50°0.08Light rain
53 °Light rain

Oswego, Monday, 19 October

Light rain. High 53°, low 50°.

Pressure30.24 inHg
Wind7.4 mph S
Humidity64%
Visibility—
Dew point41°
Tue, 2066° / 51°0.04Light rain
66 °Light rain

Oswego, Tuesday, 20 October

Light rain. High 66°, low 51°.

Pressure30.24 inHg
Wind8.7 mph SE
Humidity89%
Visibility—
Dew point58°
Wed, 2173° / 57°0Partly cloudy
73 °Partly cloudy

Oswego, Wednesday, 21 October

Partly cloudy. High 73°, low 57°.

Pressure30.21 inHg
Wind11.4 mph S
Humidity68%
Visibility—
Dew point58°
Thu, 2271° / 61°0.02Light rain
71 °Light rain

Oswego, Thursday, 22 October

Light rain. High 71°, low 61°.

Pressure30.03 inHg
Wind17.2 mph S
Humidity72%
Visibility—
Dew point58°
Fri, 2368° / 55°0.2Rain
68 °Rain

Oswego, Friday, 23 October

Rain. High 68°, low 55°.

Pressure29.91 inHg
Wind20.6 mph SW
Humidity78%
Visibility—
Dew point59°
Sat, 2456° / 45°0Overcast
56 °Overcast

Oswego, Saturday, 24 October

Overcast. High 56°, low 45°.

Pressure30.24 inHg
Wind12.3 mph W
Humidity52%
Visibility—
Dew point37°
Sun, 2555° / 39°0Clear
55 °Clear

Oswego, Sunday, 25 October

Clear. High 55°, low 39°.

Pressure30.18 inHg
Wind6.8 mph NW
Humidity50%
Visibility—
Dew point34°
Mon, 2655° / 41°0Clear
55 °Clear

Oswego, Monday, 26 October

Clear. High 55°, low 41°.

Pressure30.33 inHg
Wind8.7 mph N
Humidity45%
Visibility—
Dew point31°
Tue, 2757° / 41°0Overcast
57 °Overcast

Oswego, Tuesday, 27 October

Overcast. High 57°, low 41°.

Pressure30.21 inHg
Wind11.6 mph W
Humidity57%
Visibility—
Dew point39°
Wed, 2854° / 46°0Partly cloudy
54 °Partly cloudy

Oswego, Wednesday, 28 October

Partly cloudy. High 54°, low 46°.

Pressure30.00 inHg
Wind17.3 mph NW
Humidity50%
Visibility—
Dew point34°
From day 17 onward the outlook is built from 60-year climate statistics
Thu, 2956° / 41°0.06Climate normal
56 °Climate normal

Oswego, Thursday, 29 October

Climate normal for this date — 60-year average.

Average high56°
Average low41°
Average precipitation0.06 in
Chance of precipitation20%
Record high79° (2024)
Record low24° (1980)
Fri, 3058° / 42°0.11Climate normal
58 °Climate normal

Oswego, Friday, 30 October

Climate normal for this date — 60-year average.

Average high58°
Average low42°
Average precipitation0.11 in
Chance of precipitation27%
Record high78° (1971)
Record low23° (1988)
Sat, 3156° / 43°0.13Climate normal
56 °Climate normal

Oswego, Saturday, 31 October

Climate normal for this date — 60-year average.

Average high56°
Average low43°
Average precipitation0.13 in
Chance of precipitation37%
Record high74° (1974)
Record low27° (2019)
Sun, 0155° / 41°0.17Climate normal
55 °Climate normal

Oswego, Sunday, 1 November

Climate normal for this date — 60-year average.

Average high55°
Average low41°
Average precipitation0.17 in
Chance of precipitation35%
Record high74° (2016)
Record low17° (2019)
Mon, 0254° / 40°0.11Climate normal
54 °Climate normal

Oswego, Monday, 2 November

Climate normal for this date — 60-year average.

Average high54°
Average low40°
Average precipitation0.11 in
Chance of precipitation35%
Record high75° (1961)
Record low23° (1991)
Tue, 0353° / 38°0.07Climate normal
53 °Climate normal

Oswego, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high53°
Average low38°
Average precipitation0.07 in
Chance of precipitation27%
Record high73° (1987)
Record low17° (1991)
Wed, 0453° / 40°0.09Climate normal
53 °Climate normal

Oswego, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high53°
Average low40°
Average precipitation0.09 in
Chance of precipitation23%
Record high71° (2015)
Record low16° (1991)
Thu, 0553° / 39°0.11Climate normal
53 °Climate normal

Oswego, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high53°
Average low39°
Average precipitation0.11 in
Chance of precipitation28%
Record high75° (1978)
Record low18° (1991)
Fri, 0653° / 37°0.07Climate normal
53 °Climate normal

Oswego, Friday, 6 November

Climate normal for this date — 60-year average.

Average high53°
Average low37°
Average precipitation0.07 in
Chance of precipitation27%
Record high72° (1975)
Record low23° (1991)
Sat, 0752° / 37°0.05Climate normal
52 °Climate normal

Oswego, Saturday, 7 November

Climate normal for this date — 60-year average.

Average high52°
Average low37°
Average precipitation0.05 in
Chance of precipitation20%
Record high69° (2020)
Record low16° (1991)
Sun, 0851° / 37°0.06Climate normal
51 °Climate normal

Oswego, Sunday, 8 November

Climate normal for this date — 60-year average.

Average high51°
Average low37°
Average precipitation0.06 in
Chance of precipitation20%
Record high74° (2020)
Record low12° (1991)
Mon, 0952° / 38°0.11Climate normal
52 °Climate normal

Oswego, Monday, 9 November

Climate normal for this date — 60-year average.

Average high52°
Average low38°
Average precipitation0.11 in
Chance of precipitation33%
Record high73° (1999)
Record low16° (1991)
Tue, 1050° / 37°0.12Climate normal
50 °Climate normal

Oswego, Tuesday, 10 November

Climate normal for this date — 60-year average.

Average high50°
Average low37°
Average precipitation0.12 in
Chance of precipitation38%
Record high72° (2020)
Record low17° (2017)
Wed, 1148° / 34°0.06Climate normal
48 °Climate normal

Oswego, Wednesday, 11 November

Climate normal for this date — 60-year average.

Average high48°
Average low34°
Average precipitation0.06 in
Chance of precipitation27%
Record high71° (1964)
Record low16° (2019)

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 Oswego, 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 Oswego, 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.