As of 14:08 CDT

Weather in Swift, IL

83°

Swift, Saturday, 8 August, 14:08

Clear. Feels like 85°. High 84°, low 68°.

Pressure30.00 inHg

Wind5 mph SW

Humidity55%

Visibility6.2 mi

Dew point65°

See detailed hourly forecast

Monthly outlook for Swift, IL: average high 79°, average low 65°. That is 0.5° below the climate normal for August. Precipitation is expected on 5 days (about 2.1 inches), against a normal of 6 days and 1.8 inches. The warmest day looks like 8 August (84°), the coolest 23 August (56.9°).

79°/65°

Average high / low

−0.5°

Below normal

5 / 6

Wet days / normal

2.1 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
8 August – 17 August	79.8°	80.1°	-0.1°
18 August – 27 August	77.5°	79.9°	-1.3°
28 August – 6 September	at normal	78.4°	—

August records over 66 years

99.3°24 August 2023All-time high

45.1°29 August 1965All-time low

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

Sun, 0984° / 65°

1.35

84 °

Swift, Sunday, 9 August

Heavy rain. High 84°, low 65°.

Pressure29.88 inHg

Wind9.4 mph E

Humidity97%

Visibility6.2 mi

Dew point66°

Mon, 1083° / 72°

0.08

83 °

Swift, Monday, 10 August

Rain. High 83°, low 72°.

Pressure29.88 inHg

Wind5.3 mph SE

Humidity70%

Visibility6.2 mi

Dew point69°

Tue, 1183° / 71°

0.25

83 °

Swift, Tuesday, 11 August

Rain. High 83°, low 71°.

Pressure29.80 inHg

Wind8.9 mph W

Humidity72%

Visibility6.2 mi

Dew point71°

Wed, 1283° / 68°

0.01

83 °

Swift, Wednesday, 12 August

Light rain. High 83°, low 68°.

Pressure29.85 inHg

Wind4 mph N

Humidity73%

Visibility6.2 mi

Dew point66°

Thu, 1373° / 63°

0.05

73 °

Swift, Thursday, 13 August

Light rain. High 73°, low 63°.

Pressure29.94 inHg

Wind11.9 mph E

Humidity62%

Visibility—

Dew point59°

Fri, 1476° / 60°

76 °

Swift, Friday, 14 August

Clear. High 76°, low 60°.

Pressure30.18 inHg

Wind7.5 mph N

Humidity42%

Visibility—

Dew point49°

Sat, 1576° / 59°

76 °

Swift, Saturday, 15 August

Overcast. High 76°, low 59°.

Pressure30.33 inHg

Wind7 mph SW

Humidity48%

Visibility—

Dew point51°

Sun, 1678° / 60°

78 °

Swift, Sunday, 16 August

Partly cloudy. High 78°, low 60°.

Pressure30.18 inHg

Wind9.9 mph S

Humidity54%

Visibility—

Dew point56°

Mon, 1778° / 67°

0.03

78 °

Swift, Monday, 17 August

Light rain. High 78°, low 67°.

Pressure30.00 inHg

Wind5.8 mph S

Humidity80%

Visibility—

Dew point66°

Tue, 1884° / 70°

84 °

Swift, Tuesday, 18 August

Overcast. High 84°, low 70°.

Pressure30.00 inHg

Wind8.6 mph NE

Humidity52%

Visibility—

Dew point62°

Wed, 1982° / 67°

0.33

82 °

Swift, Wednesday, 19 August

Rain. High 82°, low 67°.

Pressure29.91 inHg

Wind9.6 mph SW

Humidity64%

Visibility—

Dew point67°

Thu, 2076° / 68°

0.02

76 °

Swift, Thursday, 20 August

Light rain. High 76°, low 68°.

Pressure29.88 inHg

Wind8.2 mph N

Humidity66%

Visibility—

Dew point63°

Fri, 2181° / 65°

0.01

81 °

Swift, Friday, 21 August

Light rain. High 81°, low 65°.

Pressure29.94 inHg

Wind7.1 mph E

Humidity50%

Visibility—

Dew point58°

Sat, 2274° / 60°

0.01

74 °

Swift, Saturday, 22 August

Light rain. High 74°, low 60°.

Pressure29.97 inHg

Wind14.2 mph NE

Humidity75%

Visibility—

Dew point61°

Sun, 2367° / 57°

67 °

Swift, Sunday, 23 August

Clear. High 67°, low 57°.

Pressure30.24 inHg

Wind12.1 mph NE

Humidity43%

Visibility—

Dew point43°

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

Mon, 2480° / 64°

0.13

80 °

Swift, Monday, 24 August

Climate normal for this date — 60-year average.

Average high80°

Average low64°

Average precipitation0.13 in

Chance of precipitation27%

Record high99° (2023)

Record low53° (1967)

Tue, 2580° / 64°

0.07

80 °

Swift, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high80°

Average low64°

Average precipitation0.07 in

Chance of precipitation25%

Record high92° (2003)

Record low52° (2017)

Wed, 2681° / 65°

0.15

81 °

Swift, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high81°

Average low65°

Average precipitation0.15 in

Chance of precipitation32%

Record high95° (2024)

Record low51° (1964)

Thu, 2780° / 66°

0.11

80 °

Swift, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high80°

Average low66°

Average precipitation0.11 in

Chance of precipitation30%

Record high97° (2024)

Record low54° (2015)

Fri, 2880° / 65°

0.13

80 °

Swift, Friday, 28 August

Climate normal for this date — 60-year average.

Average high80°

Average low65°

Average precipitation0.13 in

Chance of precipitation37%

Record high93° (1984)

Record low48° (1986)

Sat, 2980° / 64°

0.11

80 °

Swift, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high80°

Average low64°

Average precipitation0.11 in

Chance of precipitation30%

Record high94° (1984)

Record low45° (1965)

Sun, 3079° / 63°

0.13

79 °

Swift, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high79°

Average low63°

Average precipitation0.13 in

Chance of precipitation28%

Record high93° (2013)

Record low51° (1986)

Mon, 3178° / 63°

0.08

78 °

Swift, Monday, 31 August

Climate normal for this date — 60-year average.

Average high78°

Average low63°

Average precipitation0.08 in

Chance of precipitation18%

Record high90° (2012)

Record low51° (2009)

Tue, 0178° / 63°

0.12

78 °

Swift, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high78°

Average low63°

Average precipitation0.12 in

Chance of precipitation32%

Record high93° (2011)

Record low47° (2009)

Wed, 0279° / 63°

0.04

79 °

Swift, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high79°

Average low63°

Average precipitation0.04 in

Chance of precipitation22%

Record high92° (2008)

Record low48° (1965)

Thu, 0378° / 63°

0.09

78 °

Swift, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high78°

Average low63°

Average precipitation0.09 in

Chance of precipitation30%

Record high94° (2023)

Record low48° (1974)

Fri, 0477° / 62°

0.09

77 °

Swift, Friday, 4 September

Climate normal for this date — 60-year average.

Average high77°

Average low62°

Average precipitation0.09 in

Chance of precipitation32%

Record high92° (2023)

Record low47° (1974)

Sat, 0577° / 61°

0.08

77 °

Swift, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high77°

Average low61°

Average precipitation0.08 in

Chance of precipitation23%

Record high90° (2023)

Record low50° (2010)

Sun, 0677° / 61°

0.11

77 °

Swift, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high77°

Average low61°

Average precipitation0.11 in

Chance of precipitation37%

Record high91° (1990)

Record low47° (1988)

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 Swift, 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 Swift, 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.