Monthly outlook for Heyworth, IL: average high 81.4°, average low 65.3°. That is 0.2° above the climate normal for August. Precipitation is expected on 8 days (about 3.2 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 10 August (94.7°), the coolest 23 August (58.4°).
81.4°/65.3°
Average high / low
+0.2°
Above normal
8 / 5
Wet days / normal
3.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
82.5°
81°
+0.8°
19 August – 28 August
79.7°
81.4°
-0.9°
29 August – 7 September
at normal
79.8°
—
August records over 66 years
97°17 August 1988All-time high
45.1°29 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Bloomington (11 mi).
Mon, 1095° / 77°0
95 °
Heyworth, Monday, 10 August
Overcast. High 95°, low 77°.
Pressure29.91 inHg
Wind11.8 mph SW
Humidity60%
Visibility6.2 mi
Dew point72°
Tue, 1192° / 72°0.15
92 °
Heyworth, Tuesday, 11 August
Rain. High 92°, low 72°.
Pressure29.88 inHg
Wind15.6 mph SW
Humidity59%
Visibility6.2 mi
Dew point71°
Wed, 1286° / 72°0.07
86 °
Heyworth, Wednesday, 12 August
Light rain. High 86°, low 72°.
Pressure29.85 inHg
Wind4.6 mph N
Humidity70%
Visibility6.2 mi
Dew point73°
Thu, 1373° / 66°1.83
73 °
Heyworth, Thursday, 13 August
Heavy rain. High 73°, low 66°.
Pressure29.91 inHg
Wind17.6 mph NE
Humidity94%
Visibility—
Dew point71°
Fri, 1475° / 65°0.76
75 °
Heyworth, Friday, 14 August
Rain. High 75°, low 65°.
Pressure30.06 inHg
Wind16.2 mph E
Humidity79%
Visibility—
Dew point67°
Sat, 1576° / 66°0.22
76 °
Heyworth, Saturday, 15 August
Light rain. High 76°, low 66°.
Pressure30.15 inHg
Wind15.8 mph SE
Humidity81%
Visibility—
Dew point68°
Sun, 1679° / 69°0
79 °
Heyworth, Sunday, 16 August
Overcast. High 79°, low 69°.
Pressure30.00 inHg
Wind12.8 mph N
Humidity82%
Visibility—
Dew point72°
Mon, 1776° / 61°0
76 °
Heyworth, Monday, 17 August
Partly cloudy. High 76°, low 61°.
Pressure30.09 inHg
Wind9.6 mph N
Humidity65%
Visibility—
Dew point61°
Tue, 1881° / 61°0
81 °
Heyworth, Tuesday, 18 August
Overcast. High 81°, low 61°.
Pressure29.88 inHg
Wind10.4 mph S
Humidity70%
Visibility—
Dew point65°
Wed, 1979° / 66°0.04
79 °
Heyworth, Wednesday, 19 August
Light rain. High 79°, low 66°.
Pressure29.85 inHg
Wind13.2 mph NW
Humidity60%
Visibility—
Dew point63°
Thu, 2077° / 60°0.06
77 °
Heyworth, Thursday, 20 August
Light rain. High 77°, low 60°.
Pressure29.97 inHg
Wind6.2 mph N
Humidity65%
Visibility—
Dew point62°
Fri, 2181° / 61°0.02
81 °
Heyworth, Friday, 21 August
Light rain. High 81°, low 61°.
Pressure29.85 inHg
Wind13.5 mph S
Humidity65%
Visibility—
Dew point63°
Sat, 2285° / 65°0.05
85 °
Heyworth, Saturday, 22 August
Light rain. High 85°, low 65°.
Pressure29.83 inHg
Wind13.2 mph NW
Humidity52%
Visibility—
Dew point63°
Sun, 2377° / 58°0
77 °
Heyworth, Sunday, 23 August
Clear. High 77°, low 58°.
Pressure30.15 inHg
Wind8.1 mph N
Humidity50%
Visibility—
Dew point54°
Mon, 2479° / 59°0
79 °
Heyworth, Monday, 24 August
Clear. High 79°, low 59°.
Pressure30.21 inHg
Wind6.8 mph SE
Humidity53%
Visibility—
Dew point57°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2582° / 65°0.12
82 °
Heyworth, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.12 in
Chance of precipitation30%
Record high92° (2014)
Record low55° (1966)
Wed, 2682° / 66°0.13
82 °
Heyworth, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.13 in
Chance of precipitation37%
Record high92° (2003)
Record low53° (1964)
Thu, 2782° / 66°0.09
82 °
Heyworth, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.09 in
Chance of precipitation25%
Record high94° (2024)
Record low52° (1968)
Fri, 2882° / 65°0.12
82 °
Heyworth, Friday, 28 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.12 in
Chance of precipitation28%
Record high93° (2013)
Record low48° (1986)
Sat, 2981° / 65°0.13
81 °
Heyworth, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.13 in
Chance of precipitation33%
Record high94° (1984)
Record low45° (1986)
Sun, 3080° / 64°0.08
80 °
Heyworth, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.08 in
Chance of precipitation27%
Record high94° (2013)
Record low50° (1986)
Mon, 3180° / 64°0.08
80 °
Heyworth, Monday, 31 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.08 in
Chance of precipitation30%
Record high93° (2011)
Record low50° (2009)
Tue, 0180° / 64°0.15
80 °
Heyworth, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.15 in
Chance of precipitation25%
Record high99° (2011)
Record low49° (1967)
Wed, 0280° / 64°0.07
80 °
Heyworth, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.07 in
Chance of precipitation22%
Record high97° (2011)
Record low49° (2017)
Thu, 0380° / 64°0.07
80 °
Heyworth, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.07 in
Chance of precipitation25%
Record high94° (2011)
Record low47° (1974)
Fri, 0479° / 62°0.11
79 °
Heyworth, Friday, 4 September
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.11 in
Chance of precipitation30%
Record high92° (1960)
Record low46° (1974)
Sat, 0579° / 62°0.04
79 °
Heyworth, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.04 in
Chance of precipitation23%
Record high91° (1990)
Record low50° (1997)
Sun, 0679° / 62°0.09
79 °
Heyworth, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.09 in
Chance of precipitation30%
Record high93° (1960)
Record low46° (1962)
Mon, 0779° / 62°0.07
79 °
Heyworth, Monday, 7 September
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.07 in
Chance of precipitation27%
Record high93° (1960)
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 Heyworth, 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 Heyworth, 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.