As of 15:50 CDT

Weather in Washington, IL

85°

Washington, Saturday, 8 August, 15:50

Clear. Feels like 89°. High 85°, low 69°.

Pressure30.03 inHg

Wind4 mph W

Humidity60%

Visibility6.2 mi

Dew point70°

See detailed hourly forecast

Monthly outlook for Washington, IL: average high 81.1°, average low 63.9°. That is 0.3° below the climate normal for August. Precipitation is expected on 6 days (about 0.9 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 9 August (92.7°), the coolest 23 August (49°).

81.1°/63.9°

Average high / low

−0.3°

Below normal

6 / 5

Wet days / normal

0.9 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
8 August – 17 August	81.7°	81.6°	+0°
18 August – 27 August	80.2°	81.7°	-0.9°
28 August – 6 September	at normal	80.2°	—

August records over 66 years

97.7°1 August 1988All-time high

47.1°29 August 1986All-time low

Climate normals and records are computed from the nearest reference point — Peoria (10 mi).

Sun, 0993° / 68°

93 °

Washington, Sunday, 9 August

Overcast. High 93°, low 68°.

Pressure29.91 inHg

Wind16.4 mph S

Humidity69%

Visibility6.2 mi

Dew point74°

Mon, 1092° / 76°

0.02

92 °

Washington, Monday, 10 August

Light rain. High 92°, low 76°.

Pressure29.88 inHg

Wind11.5 mph SW

Humidity55%

Visibility6.2 mi

Dew point72°

Tue, 1192° / 71°

0.07

92 °

Washington, Tuesday, 11 August

Light rain. High 92°, low 71°.

Pressure29.83 inHg

Wind6.9 mph SW

Humidity59%

Visibility6.2 mi

Dew point71°

Wed, 1279° / 68°

0.03

79 °

Washington, Wednesday, 12 August

Light rain. High 79°, low 68°.

Pressure29.88 inHg

Wind10.2 mph NE

Humidity76%

Visibility6.2 mi

Dew point71°

Thu, 1370° / 64°

0.4

70 °

Washington, Thursday, 13 August

Rain. High 70°, low 64°.

Pressure29.91 inHg

Wind10.8 mph NE

Humidity96%

Visibility—

Dew point68°

Fri, 1475° / 55°

75 °

Washington, Friday, 14 August

Clear. High 75°, low 55°.

Pressure30.18 inHg

Wind8 mph NE

Humidity59%

Visibility—

Dew point56°

Sat, 1574° / 55°

74 °

Washington, Saturday, 15 August

Overcast. High 74°, low 55°.

Pressure30.30 inHg

Wind8 mph SE

Humidity53%

Visibility—

Dew point52°

Sun, 1679° / 56°

79 °

Washington, Sunday, 16 August

Overcast. High 79°, low 56°.

Pressure30.18 inHg

Wind12.5 mph S

Humidity66%

Visibility—

Dew point59°

Mon, 1780° / 66°

0.04

80 °

Washington, Monday, 17 August

Light rain. High 80°, low 66°.

Pressure29.94 inHg

Wind10.4 mph S

Humidity80%

Visibility—

Dew point71°

Tue, 1883° / 69°

0.01

83 °

Washington, Tuesday, 18 August

Light rain. High 83°, low 69°.

Pressure30.00 inHg

Wind8.3 mph NE

Humidity67%

Visibility—

Dew point69°

Wed, 1987° / 67°

0.13

87 °

Washington, Wednesday, 19 August

Light rain. High 87°, low 67°.

Pressure29.91 inHg

Wind9.3 mph S

Humidity63%

Visibility—

Dew point69°

Thu, 2081° / 67°

0.17

81 °

Washington, Thursday, 20 August

Light rain. High 81°, low 67°.

Pressure29.88 inHg

Wind9.2 mph N

Humidity66%

Visibility—

Dew point67°

Fri, 2181° / 62°

81 °

Washington, Friday, 21 August

Mostly clear. High 81°, low 62°.

Pressure29.94 inHg

Wind8.2 mph NE

Humidity60%

Visibility—

Dew point62°

Sat, 2282° / 60°

0.01

82 °

Washington, Saturday, 22 August

Light rain. High 82°, low 60°.

Pressure29.91 inHg

Wind17.5 mph NE

Humidity57%

Visibility—

Dew point63°

Sun, 2368° / 49°

68 °

Washington, Sunday, 23 August

Mostly clear. High 68°, low 49°.

Pressure30.21 inHg

Wind13.5 mph E

Humidity48%

Visibility—

Dew point44°

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

Mon, 2482° / 65°

0.1

82 °

Washington, Monday, 24 August

Climate normal for this date — 60-year average.

Average high82°

Average low65°

Average precipitation0.1 in

Chance of precipitation32%

Record high97° (2023)

Record low53° (1966)

Tue, 2582° / 65°

0.1

82 °

Washington, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high82°

Average low65°

Average precipitation0.1 in

Chance of precipitation33%

Record high94° (2014)

Record low54° (1966)

Wed, 2682° / 66°

0.14

82 °

Washington, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high82°

Average low66°

Average precipitation0.14 in

Chance of precipitation35%

Record high92° (2003)

Record low53° (1964)

Thu, 2782° / 66°

0.09

82 °

Washington, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high82°

Average low66°

Average precipitation0.09 in

Chance of precipitation23%

Record high94° (2024)

Record low54° (1968)

Fri, 2882° / 65°

0.12

82 °

Washington, Friday, 28 August

Climate normal for this date — 60-year average.

Average high82°

Average low65°

Average precipitation0.12 in

Chance of precipitation27%

Record high93° (2013)

Record low49° (1986)

Sat, 2982° / 65°

0.11

82 °

Washington, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high82°

Average low65°

Average precipitation0.11 in

Chance of precipitation35%

Record high94° (1984)

Record low47° (1986)

Sun, 3081° / 65°

0.06

81 °

Washington, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high81°

Average low65°

Average precipitation0.06 in

Chance of precipitation28%

Record high96° (2013)

Record low52° (1986)

Mon, 3180° / 64°

0.08

80 °

Washington, Monday, 31 August

Climate normal for this date — 60-year average.

Average high80°

Average low64°

Average precipitation0.08 in

Chance of precipitation23%

Record high92° (2011)

Record low50° (2009)

Tue, 0180° / 64°

0.17

80 °

Washington, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high80°

Average low64°

Average precipitation0.17 in

Chance of precipitation28%

Record high98° (2011)

Record low48° (1967)

Wed, 0280° / 64°

0.06

80 °

Washington, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high80°

Average low64°

Average precipitation0.06 in

Chance of precipitation22%

Record high95° (2011)

Record low49° (1967)

Thu, 0380° / 64°

0.09

80 °

Washington, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high80°

Average low64°

Average precipitation0.09 in

Chance of precipitation28%

Record high92° (1964)

Record low47° (1974)

Fri, 0479° / 62°

0.11

79 °

Washington, Friday, 4 September

Climate normal for this date — 60-year average.

Average high79°

Average low62°

Average precipitation0.11 in

Chance of precipitation32%

Record high91° (2007)

Record low44° (1974)

Sat, 0579° / 62°

0.04

79 °

Washington, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high79°

Average low62°

Average precipitation0.04 in

Chance of precipitation17%

Record high92° (1990)

Record low50° (1974)

Sun, 0678° / 62°

0.1

78 °

Washington, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high78°

Average low62°

Average precipitation0.1 in

Chance of precipitation33%

Record high92° (2015)

Record low46° (1962)

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 Washington, 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 Washington, 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.