Monthly outlook for North Quincy, IL: average high 84.4°, average low 67°. That is 0.1° above the climate normal for August. Precipitation is expected on 6 days (about 3.6 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 11 August (103°), the coolest 21 August (53.1°).
84.4°/67°
Average high / low
+0.1°
Above normal
6 / 5
Wet days / normal
3.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
86.2°
84.2°
+1.1°
19 August – 28 August
81.5°
84.2°
-1.5°
29 August – 7 September
at normal
82°
—
August records over 66 years
101.5°15 August 2007All-time high
48.7°29 August 1986All-time low
Climate normals and records are computed from the nearest reference point — La Grange (8 mi).
Mon, 10100° / 75°0
100 °
North Quincy, Monday, 10 August
Overcast. High 100°, low 75°.
Pressure29.85 inHg
Wind12.7 mph SW
Humidity41%
Visibility6.2 mi
Dew point67°
Tue, 11103° / 82°0
103 °
North Quincy, Tuesday, 11 August
Overcast. High 103°, low 82°.
Pressure29.80 inHg
Wind12.6 mph SW
Humidity42%
Visibility6.2 mi
Dew point66°
Wed, 1290° / 71°0.28
90 °
North Quincy, Wednesday, 12 August
Rain. High 90°, low 71°.
Pressure29.88 inHg
Wind7.4 mph NW
Humidity86%
Visibility6.2 mi
Dew point70°
Thu, 1380° / 66°2.56
80 °
North Quincy, Thursday, 13 August
Heavy rain. High 80°, low 66°.
Pressure29.88 inHg
Wind12.8 mph E
Humidity77%
Visibility—
Dew point69°
Fri, 1475° / 64°0.26
75 °
North Quincy, Friday, 14 August
Light rain. High 75°, low 64°.
Pressure30.06 inHg
Wind12.7 mph E
Humidity79%
Visibility—
Dew point67°
Sat, 1574° / 67°0.29
74 °
North Quincy, Saturday, 15 August
Light rain. High 74°, low 67°.
Pressure30.15 inHg
Wind17 mph SE
Humidity79%
Visibility—
Dew point66°
Sun, 1678° / 65°0
78 °
North Quincy, Sunday, 16 August
Light rain. High 78°, low 65°.
Pressure30.12 inHg
Wind8.6 mph E
Humidity83%
Visibility—
Dew point66°
Mon, 1782° / 68°0.08
82 °
North Quincy, Monday, 17 August
Light rain. High 82°, low 68°.
Pressure30.06 inHg
Wind5.4 mph NE
Humidity69%
Visibility—
Dew point68°
Tue, 1886° / 67°0
86 °
North Quincy, Tuesday, 18 August
Overcast. High 86°, low 67°.
Pressure30.00 inHg
Wind6.6 mph S
Humidity71%
Visibility—
Dew point70°
Wed, 1981° / 66°0
81 °
North Quincy, Wednesday, 19 August
Overcast. High 81°, low 66°.
Pressure29.91 inHg
Wind11.8 mph NE
Humidity76%
Visibility—
Dew point71°
Thu, 2076° / 57°0
76 °
North Quincy, Thursday, 20 August
Overcast. High 76°, low 57°.
Pressure30.06 inHg
Wind14.4 mph NE
Humidity52%
Visibility—
Dew point53°
Fri, 2172° / 53°0
72 °
North Quincy, Friday, 21 August
Overcast. High 72°, low 53°.
Pressure30.03 inHg
Wind9.6 mph SE
Humidity53%
Visibility—
Dew point51°
Sat, 2285° / 62°0.11
85 °
North Quincy, Saturday, 22 August
Light rain. High 85°, low 62°.
Pressure29.85 inHg
Wind10.9 mph S
Humidity68%
Visibility—
Dew point65°
Sun, 2390° / 66°0
90 °
North Quincy, Sunday, 23 August
Mostly clear. High 90°, low 66°.
Pressure29.94 inHg
Wind6.6 mph SW
Humidity52%
Visibility—
Dew point65°
Mon, 2485° / 71°0
85 °
North Quincy, Monday, 24 August
Overcast. High 85°, low 71°.
Pressure29.97 inHg
Wind11.3 mph SW
Humidity61%
Visibility—
Dew point68°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2585° / 67°0.11
85 °
North Quincy, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high85°
Average low67°
Average precipitation0.11 in
Chance of precipitation28%
Record high98° (2003)
Record low55° (2015)
Wed, 2685° / 68°0.15
85 °
North Quincy, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high85°
Average low68°
Average precipitation0.15 in
Chance of precipitation27%
Record high99° (2003)
Record low55° (2025)
Thu, 2784° / 69°0.06
84 °
North Quincy, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high84°
Average low69°
Average precipitation0.06 in
Chance of precipitation27%
Record high97° (1983)
Record low56° (2025)
Fri, 2884° / 67°0.09
84 °
North Quincy, Friday, 28 August
Climate normal for this date — 60-year average.
Average high84°
Average low67°
Average precipitation0.09 in
Chance of precipitation25%
Record high96° (2013)
Record low51° (1986)
Sat, 2984° / 67°0.07
84 °
North Quincy, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high84°
Average low67°
Average precipitation0.07 in
Chance of precipitation25%
Record high95° (1984)
Record low49° (1986)
Sun, 3083° / 67°0.09
83 °
North Quincy, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high83°
Average low67°
Average precipitation0.09 in
Chance of precipitation23%
Record high99° (2013)
Record low54° (2009)
Mon, 3182° / 66°0.12
82 °
North Quincy, Monday, 31 August
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.12 in
Chance of precipitation25%
Record high95° (2000)
Record low54° (1967)
Tue, 0182° / 66°0.13
82 °
North Quincy, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.13 in
Chance of precipitation28%
Record high98° (2011)
Record low48° (1967)
Wed, 0282° / 66°0.1
82 °
North Quincy, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.1 in
Chance of precipitation27%
Record high94° (2011)
Record low52° (1974)
Thu, 0382° / 65°0.09
82 °
North Quincy, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.09 in
Chance of precipitation22%
Record high94° (1960)
Record low49° (1974)
Fri, 0481° / 64°0.08
81 °
North Quincy, Friday, 4 September
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.08 in
Chance of precipitation18%
Record high95° (1960)
Record low44° (1974)
Sat, 0582° / 64°0.03
82 °
North Quincy, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high82°
Average low64°
Average precipitation0.03 in
Chance of precipitation20%
Record high94° (1990)
Record low49° (1974)
Sun, 0681° / 65°0.07
81 °
North Quincy, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.07 in
Chance of precipitation20%
Record high95° (1990)
Record low49° (1974)
Mon, 0781° / 64°0.11
81 °
North Quincy, Monday, 7 September
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.11 in
Chance of precipitation22%
Record high94° (2013)
Record low49° (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 North Quincy, 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 North Quincy, 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.