Monthly outlook for Park City, IL: average high 79.8°, average low 66.6°. That is 1.1° above the climate normal for August. Precipitation is expected on 7 days (about 3.2 inches), against a normal of 6 days and 1.8 inches. The warmest day looks like 20 August (91.5°), the coolest 14 August (61.1°).
79.8°/66.6°
Average high / low
+1.1°
Above normal
7 / 6
Wet days / normal
3.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
77.6°
77.9°
-0.1°
19 August – 28 August
83.3°
77.8°
+3.1°
29 August – 7 September
at normal
76.1°
—
August records over 66 years
98.6°24 August 2023All-time high
52.5°22 August 2024All-time low
Climate normals and records are computed from the nearest reference point — Highwood (11 mi).
Mon, 1088° / 71°0.39
88 °
Park City, Monday, 10 August
Rain. High 88°, low 71°.
Pressure29.91 inHg
Wind3.8 mph NE
Humidity73%
Visibility6.2 mi
Dew point70°
Tue, 1181° / 67°1.48
81 °
Park City, Tuesday, 11 August
Heavy rain. High 81°, low 67°.
Pressure29.83 inHg
Wind7.7 mph SE
Humidity69%
Visibility6.2 mi
Dew point69°
Wed, 1283° / 65°0
83 °
Park City, Wednesday, 12 August
Clear. High 83°, low 65°.
Pressure29.85 inHg
Wind3.8 mph N
Humidity64%
Visibility6.2 mi
Dew point66°
Thu, 1372° / 65°0.02
72 °
Park City, Thursday, 13 August
Light rain. High 72°, low 65°.
Pressure29.97 inHg
Wind7.6 mph E
Humidity69%
Visibility—
Dew point60°
Fri, 1471° / 61°0
71 °
Park City, Friday, 14 August
Partly cloudy. High 71°, low 61°.
Pressure30.18 inHg
Wind9.9 mph NE
Humidity54%
Visibility—
Dew point52°
Sat, 1574° / 62°0
74 °
Park City, Saturday, 15 August
Overcast. High 74°, low 62°.
Pressure30.24 inHg
Wind11.3 mph E
Humidity53%
Visibility—
Dew point55°
Sun, 1672° / 65°0.04
72 °
Park City, Sunday, 16 August
Light rain. High 72°, low 65°.
Pressure30.09 inHg
Wind8.5 mph SE
Humidity70%
Visibility—
Dew point60°
Mon, 1776° / 65°0.04
76 °
Park City, Monday, 17 August
Light rain. High 76°, low 65°.
Pressure30.09 inHg
Wind10.4 mph NE
Humidity71%
Visibility—
Dew point64°
Tue, 1876° / 64°0
76 °
Park City, Tuesday, 18 August
Overcast. High 76°, low 64°.
Pressure30.03 inHg
Wind5.8 mph SE
Humidity68%
Visibility—
Dew point59°
Wed, 1984° / 68°0.22
84 °
Park City, Wednesday, 19 August
Light rain. High 84°, low 68°.
Pressure29.88 inHg
Wind14.7 mph S
Humidity64%
Visibility—
Dew point66°
Thu, 2091° / 74°0
91 °
Park City, Thursday, 20 August
Overcast. High 91°, low 74°.
Pressure29.77 inHg
Wind5.6 mph S
Humidity63%
Visibility—
Dew point71°
Fri, 2179° / 70°0
79 °
Park City, Friday, 21 August
Clear. High 79°, low 70°.
Pressure29.94 inHg
Wind13.2 mph NE
Humidity61%
Visibility—
Dew point64°
Sat, 2287° / 68°0.02
87 °
Park City, Saturday, 22 August
Light rain. High 87°, low 68°.
Pressure29.88 inHg
Wind8.4 mph NE
Humidity56%
Visibility—
Dew point64°
Sun, 2384° / 69°0
84 °
Park City, Sunday, 23 August
Overcast. High 84°, low 69°.
Pressure29.83 inHg
Wind13.4 mph N
Humidity60%
Visibility—
Dew point68°
Mon, 2474° / 68°0.05
74 °
Park City, Monday, 24 August
Light rain. High 74°, low 68°.
Pressure30.06 inHg
Wind15.7 mph NE
Humidity82%
Visibility—
Dew point65°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2578° / 68°0.07
78 °
Park City, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high78°
Average low68°
Average precipitation0.07 in
Chance of precipitation25%
Record high91° (2024)
Record low54° (2017)
Wed, 2679° / 68°0.14
79 °
Park City, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high79°
Average low68°
Average precipitation0.14 in
Chance of precipitation35%
Record high94° (2024)
Record low54° (2025)
Thu, 2778° / 69°0.1
78 °
Park City, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high78°
Average low69°
Average precipitation0.1 in
Chance of precipitation32%
Record high96° (2024)
Record low55° (2025)
Fri, 2878° / 68°0.12
78 °
Park City, Friday, 28 August
Climate normal for this date — 60-year average.
Average high78°
Average low68°
Average precipitation0.12 in
Chance of precipitation35%
Record high92° (2021)
Record low54° (1986)
Sat, 2978° / 68°0.13
78 °
Park City, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high78°
Average low68°
Average precipitation0.13 in
Chance of precipitation28%
Record high89° (1984)
Record low54° (1965)
Sun, 3077° / 67°0.09
77 °
Park City, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high77°
Average low67°
Average precipitation0.09 in
Chance of precipitation27%
Record high91° (2013)
Record low57° (2023)
Mon, 3176° / 67°0.06
76 °
Park City, Monday, 31 August
Climate normal for this date — 60-year average.
Average high76°
Average low67°
Average precipitation0.06 in
Chance of precipitation20%
Record high89° (2012)
Record low56° (2025)
Tue, 0176° / 67°0.1
76 °
Park City, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high76°
Average low67°
Average precipitation0.1 in
Chance of precipitation28%
Record high89° (1960)
Record low57° (2017)
Wed, 0277° / 67°0.04
77 °
Park City, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high77°
Average low67°
Average precipitation0.04 in
Chance of precipitation25%
Record high87° (2023)
Record low50° (2017)
Thu, 0376° / 66°0.09
76 °
Park City, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high76°
Average low66°
Average precipitation0.09 in
Chance of precipitation27%
Record high92° (2023)
Record low54° (1974)
Fri, 0475° / 66°0.08
75 °
Park City, Friday, 4 September
Climate normal for this date — 60-year average.
Average high75°
Average low66°
Average precipitation0.08 in
Chance of precipitation30%
Record high91° (2023)
Record low49° (2025)
Sat, 0575° / 65°0.08
75 °
Park City, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high75°
Average low65°
Average precipitation0.08 in
Chance of precipitation25%
Record high89° (2023)
Record low55° (2017)
Sun, 0675° / 65°0.09
75 °
Park City, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high75°
Average low65°
Average precipitation0.09 in
Chance of precipitation33%
Record high90° (1990)
Record low49° (2025)
Mon, 0775° / 65°0.07
75 °
Park City, Monday, 7 September
Climate normal for this date — 60-year average.
Average high75°
Average low65°
Average precipitation0.07 in
Chance of precipitation28%
Record high89° (1960)
Record low48° (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 Park City, 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 Park City, 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.