Monthly outlook for Buffalo, IL: average high 84.1°, average low 66.2°. That is 0.5° above the climate normal for August. Precipitation is expected on 3 days (about 1.0 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 11 August (93.6°), the coolest 23 August (54.7°).
84.1°/66.2°
Average high / low
+0.5°
Above normal
3 / 5
Wet days / normal
1.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
84.2°
83.2°
+0.5°
18 August – 27 August
84.1°
83.5°
+0.3°
28 August – 6 September
at normal
81.9°
—
August records over 66 years
99.3°14 August 2007All-time high
47.5°29 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Springfield (14 mi).
Sun, 0992° / 71°0
92 °
Buffalo, Sunday, 9 August
Overcast. High 92°, low 71°.
Pressure29.91 inHg
Wind16.2 mph S
Humidity65%
Visibility6.2 mi
Dew point74°
Mon, 1094° / 75°0
94 °
Buffalo, Monday, 10 August
Partly cloudy. High 94°, low 75°.
Pressure29.91 inHg
Wind13.8 mph SW
Humidity55%
Visibility6.2 mi
Dew point72°
Tue, 1194° / 77°0
94 °
Buffalo, Tuesday, 11 August
Overcast. High 94°, low 77°.
Pressure29.83 inHg
Wind16.4 mph SW
Humidity49%
Visibility6.2 mi
Dew point68°
Wed, 1287° / 73°0
87 °
Buffalo, Wednesday, 12 August
Overcast. High 87°, low 73°.
Pressure29.85 inHg
Wind10.9 mph NE
Humidity68%
Visibility6.2 mi
Dew point74°
Thu, 1373° / 66°0.58
73 °
Buffalo, Thursday, 13 August
Rain. High 73°, low 66°.
Pressure29.91 inHg
Wind10.4 mph NE
Humidity95%
Visibility—
Dew point71°
Fri, 1476° / 56°0
76 °
Buffalo, Friday, 14 August
Clear. High 76°, low 56°.
Pressure30.18 inHg
Wind9.8 mph NE
Humidity50%
Visibility—
Dew point53°
Sat, 1576° / 56°0
76 °
Buffalo, Saturday, 15 August
Partly cloudy. High 76°, low 56°.
Pressure30.30 inHg
Wind7.7 mph SE
Humidity46%
Visibility—
Dew point50°
Sun, 1680° / 57°0
80 °
Buffalo, Sunday, 16 August
Overcast. High 80°, low 57°.
Pressure30.18 inHg
Wind12.7 mph S
Humidity53%
Visibility—
Dew point58°
Mon, 1784° / 67°0.1
84 °
Buffalo, Monday, 17 August
Light rain. High 84°, low 67°.
Pressure29.94 inHg
Wind12.5 mph SW
Humidity68%
Visibility—
Dew point71°
Tue, 1886° / 71°0
86 °
Buffalo, Tuesday, 18 August
Overcast. High 86°, low 71°.
Pressure30.00 inHg
Wind8.4 mph NE
Humidity60%
Visibility—
Dew point69°
Wed, 1991° / 68°0
91 °
Buffalo, Wednesday, 19 August
Overcast. High 91°, low 68°.
Pressure29.91 inHg
Wind9.4 mph S
Humidity56%
Visibility—
Dew point68°
Thu, 2083° / 70°0.31
83 °
Buffalo, Thursday, 20 August
Rain. High 83°, low 70°.
Pressure29.88 inHg
Wind9.8 mph N
Humidity68%
Visibility—
Dew point70°
Fri, 2183° / 66°0
83 °
Buffalo, Friday, 21 August
Partly cloudy. High 83°, low 66°.
Pressure29.94 inHg
Wind10.5 mph NE
Humidity54%
Visibility—
Dew point61°
Sat, 2289° / 62°0.02
89 °
Buffalo, Saturday, 22 August
Light rain. High 89°, low 62°.
Pressure29.91 inHg
Wind20.7 mph NE
Humidity41%
Visibility—
Dew point57°
Sun, 2373° / 55°0.04
73 °
Buffalo, Sunday, 23 August
Light rain. High 73°, low 55°.
Pressure30.18 inHg
Wind13.6 mph E
Humidity43%
Visibility—
Dew point46°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2483° / 66°0.11
83 °
Buffalo, Monday, 24 August
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.11 in
Chance of precipitation25%
Record high97° (2023)
Record low55° (1966)
Tue, 2584° / 67°0.08
84 °
Buffalo, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high84°
Average low67°
Average precipitation0.08 in
Chance of precipitation32%
Record high94° (1983)
Record low56° (1966)
Wed, 2684° / 68°0.11
84 °
Buffalo, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high84°
Average low68°
Average precipitation0.11 in
Chance of precipitation32%
Record high95° (2003)
Record low55° (2025)
Thu, 2784° / 68°0.09
84 °
Buffalo, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high84°
Average low68°
Average precipitation0.09 in
Chance of precipitation32%
Record high94° (1983)
Record low56° (2025)
Fri, 2884° / 67°0.11
84 °
Buffalo, Friday, 28 August
Climate normal for this date — 60-year average.
Average high84°
Average low67°
Average precipitation0.11 in
Chance of precipitation28%
Record high96° (2013)
Record low51° (1986)
Sat, 2983° / 66°0.08
83 °
Buffalo, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.08 in
Chance of precipitation27%
Record high95° (1984)
Record low47° (1986)
Sun, 3082° / 66°0.06
82 °
Buffalo, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.06 in
Chance of precipitation22%
Record high96° (2013)
Record low51° (1986)
Mon, 3182° / 66°0.09
82 °
Buffalo, Monday, 31 August
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.09 in
Chance of precipitation33%
Record high97° (2013)
Record low53° (1967)
Tue, 0182° / 66°0.17
82 °
Buffalo, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.17 in
Chance of precipitation25%
Record high98° (2011)
Record low50° (1967)
Wed, 0282° / 65°0.11
82 °
Buffalo, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.11 in
Chance of precipitation22%
Record high96° (2011)
Record low51° (2017)
Thu, 0382° / 65°0.09
82 °
Buffalo, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.09 in
Chance of precipitation25%
Record high94° (2007)
Record low47° (1974)
Fri, 0481° / 64°0.1
81 °
Buffalo, Friday, 4 September
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.1 in
Chance of precipitation25%
Record high96° (2007)
Record low49° (1974)
Sat, 0581° / 64°0.04
81 °
Buffalo, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.04 in
Chance of precipitation20%
Record high94° (1990)
Record low50° (1974)
Sun, 0681° / 64°0.05
81 °
Buffalo, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.05 in
Chance of precipitation23%
Record high95° (1990)
Record low50° (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 Buffalo, 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 Buffalo, 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.