As of 06:32 CDT

Weather in Hillsdale, IL

67°Current weather

Hillsdale, Sunday, 9 August, 06:32

Overcast. Feels like 67°. High 90°, low 65°.

Pressure29.97 inHg
Wind6 mph S
Humidity69%
Visibility6.2 mi
Dew point57°

Monthly outlook for Hillsdale, IL: average high 84.9°, average low 67.7°. That is 2.3° above the climate normal for August. Precipitation is expected on 6 days (about 1.6 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 22 August (94°), the coolest 15 August (61°).

84.9°/67.7°
Average high / low
+2.3°
Above normal
6 / 5
Wet days / normal
1.6 in
Precipitation this month

Ten-day blocks vs climate normal

PeriodForecast highNormalDifference
9 August – 18 August81.6°80.8°+0.4°
19 August – 28 August90.5°81°+5.3°
29 August – 7 Septemberat normal79.2°

August records over 66 years

101.5°16 August 1988All-time high
46.8°29 August 1986All-time low

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

Mon, 1089° / 71°0.02Light rain
89 °Light rain

Hillsdale, Monday, 10 August

Light rain. High 89°, low 71°.

Pressure29.88 inHg
Wind2.4 mph SE
Humidity76%
Visibility6.2 mi
Dew point75°
Tue, 1189° / 69°0Overcast
89 °Overcast

Hillsdale, Tuesday, 11 August

Overcast. High 89°, low 69°.

Pressure29.80 inHg
Wind6.7 mph S
Humidity70%
Visibility6.2 mi
Dew point72°
Wed, 1284° / 68°0.05Light rain
84 °Light rain

Hillsdale, Wednesday, 12 August

Light rain. High 84°, low 68°.

Pressure29.83 inHg
Wind8.9 mph NE
Humidity69%
Visibility6.2 mi
Dew point71°
Thu, 1375° / 62°0.45Rain
75 °Rain

Hillsdale, Thursday, 13 August

Rain. High 75°, low 62°.

Pressure30.03 inHg
Wind10.1 mph NE
Humidity73%
Visibility
Dew point64°
Fri, 1473° / 61°0.28Rain
73 °Rain

Hillsdale, Friday, 14 August

Rain. High 73°, low 61°.

Pressure30.15 inHg
Wind11.8 mph E
Humidity63%
Visibility
Dew point57°
Sat, 1574° / 61°0.06Light rain
74 °Light rain

Hillsdale, Saturday, 15 August

Light rain. High 74°, low 61°.

Pressure30.21 inHg
Wind10.8 mph SE
Humidity66%
Visibility
Dew point60°
Sun, 1677° / 66°0.03Light rain
77 °Light rain

Hillsdale, Sunday, 16 August

Light rain. High 77°, low 66°.

Pressure30.09 inHg
Wind5.5 mph E
Humidity83%
Visibility
Dew point68°
Mon, 1782° / 65°0Overcast
82 °Overcast

Hillsdale, Monday, 17 August

Overcast. High 82°, low 65°.

Pressure30.09 inHg
Wind5.4 mph W
Humidity64%
Visibility
Dew point65°
Tue, 1882° / 64°0Overcast
82 °Overcast

Hillsdale, Tuesday, 18 August

Overcast. High 82°, low 64°.

Pressure29.97 inHg
Wind11.3 mph S
Humidity70%
Visibility
Dew point68°
Wed, 1992° / 70°0Overcast
92 °Overcast

Hillsdale, Wednesday, 19 August

Overcast. High 92°, low 70°.

Pressure29.83 inHg
Wind12.2 mph S
Humidity65%
Visibility
Dew point72°
Thu, 2093° / 77°0Overcast
93 °Overcast

Hillsdale, Thursday, 20 August

Overcast. High 93°, low 77°.

Pressure29.77 inHg
Wind9.5 mph S
Humidity47%
Visibility
Dew point66°
Fri, 2187° / 73°0Mostly clear
87 °Mostly clear

Hillsdale, Friday, 21 August

Mostly clear. High 87°, low 73°.

Pressure29.91 inHg
Wind13 mph NE
Humidity57%
Visibility
Dew point67°
Sat, 2294° / 67°0Light rain
94 °Light rain

Hillsdale, Saturday, 22 August

Light rain. High 94°, low 67°.

Pressure29.83 inHg
Wind11.7 mph S
Humidity57%
Visibility
Dew point71°
Sun, 2392° / 76°0.02Light rain
92 °Light rain

Hillsdale, Sunday, 23 August

Light rain. High 92°, low 76°.

Pressure29.80 inHg
Wind18.8 mph S
Humidity47%
Visibility
Dew point67°
Mon, 2486° / 68°0.56Rain
86 °Rain

Hillsdale, Monday, 24 August

Rain. High 86°, low 68°.

Pressure30.03 inHg
Wind12.3 mph NE
Humidity69%
Visibility
Dew point70°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2581° / 65°0.12Climate normal
81 °Climate normal

Hillsdale, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high81°
Average low65°
Average precipitation0.12 in
Chance of precipitation32%
Record high94° (2003)
Record low53° (2025)
Wed, 2681° / 65°0.19Climate normal
81 °Climate normal

Hillsdale, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high81°
Average low65°
Average precipitation0.19 in
Chance of precipitation30%
Record high94° (2003)
Record low51° (1964)
Thu, 2781° / 66°0.12Climate normal
81 °Climate normal

Hillsdale, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high81°
Average low66°
Average precipitation0.12 in
Chance of precipitation25%
Record high96° (2024)
Record low54° (1968)
Fri, 2881° / 65°0.17Climate normal
81 °Climate normal

Hillsdale, Friday, 28 August

Climate normal for this date — 60-year average.

Average high81°
Average low65°
Average precipitation0.17 in
Chance of precipitation35%
Record high94° (1984)
Record low47° (1986)
Sat, 2981° / 64°0.09Climate normal
81 °Climate normal

Hillsdale, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high81°
Average low64°
Average precipitation0.09 in
Chance of precipitation22%
Record high94° (1984)
Record low47° (1986)
Sun, 3080° / 64°0.07Climate normal
80 °Climate normal

Hillsdale, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high80°
Average low64°
Average precipitation0.07 in
Chance of precipitation22%
Record high96° (2013)
Record low53° (2009)
Mon, 3180° / 63°0.09Climate normal
80 °Climate normal

Hillsdale, Monday, 31 August

Climate normal for this date — 60-year average.

Average high80°
Average low63°
Average precipitation0.09 in
Chance of precipitation23%
Record high94° (2000)
Record low47° (2009)
Tue, 0180° / 63°0.1Climate normal
80 °Climate normal

Hillsdale, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high80°
Average low63°
Average precipitation0.1 in
Chance of precipitation30%
Record high95° (1984)
Record low47° (1967)
Wed, 0280° / 63°0.06Climate normal
80 °Climate normal

Hillsdale, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high80°
Average low63°
Average precipitation0.06 in
Chance of precipitation28%
Record high92° (2000)
Record low49° (1967)
Thu, 0379° / 63°0.13Climate normal
79 °Climate normal

Hillsdale, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high79°
Average low63°
Average precipitation0.13 in
Chance of precipitation33%
Record high93° (2023)
Record low49° (1974)
Fri, 0478° / 62°0.1Climate normal
78 °Climate normal

Hillsdale, Friday, 4 September

Climate normal for this date — 60-year average.

Average high78°
Average low62°
Average precipitation0.1 in
Chance of precipitation27%
Record high92° (2023)
Record low46° (1974)
Sat, 0578° / 61°0.07Climate normal
78 °Climate normal

Hillsdale, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high78°
Average low61°
Average precipitation0.07 in
Chance of precipitation22%
Record high92° (1990)
Record low49° (1974)
Sun, 0678° / 62°0.12Climate normal
78 °Climate normal

Hillsdale, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high78°
Average low62°
Average precipitation0.12 in
Chance of precipitation28%
Record high93° (1960)
Record low46° (1962)
Mon, 0778° / 62°0.11Climate normal
78 °Climate normal

Hillsdale, Monday, 7 September

Climate normal for this date — 60-year average.

Average high78°
Average low62°
Average precipitation0.11 in
Chance of precipitation32%
Record high93° (1960)
Record low46° (2025)

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 Hillsdale, 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 Hillsdale, 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.