Monthly outlook for Wood River, IL: average high 94.9°, average low 73.3°. That is 5.3° above the climate normal for August. Precipitation is expected on 6 days (about 1.0 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 20 August (112.6°), the coolest 15 August (65.5°).
94.9°/73.3°
Average high / low
+5.3°
Above normal
6 / 5
Wet days / normal
1.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
89.4°
85.4°
+2.2°
19 August – 28 August
104°
85.6°
+10.3°
29 August – 7 September
at normal
83.3°
—
August records over 66 years
102.9°15 August 2007All-time high
51.8°29 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Edwardsville (7 mi).
Mon, 10100° / 71°0.2
100 °
Wood River, Monday, 10 August
Rain. High 100°, low 71°.
Pressure29.91 inHg
Wind11.1 mph SW
Humidity46%
Visibility6.2 mi
Dew point70°
Tue, 11100° / 72°0.06
100 °
Wood River, Tuesday, 11 August
Rain. High 100°, low 72°.
Pressure29.88 inHg
Wind11.9 mph SW
Humidity48%
Visibility6.2 mi
Dew point71°
Wed, 1292° / 75°0.13
92 °
Wood River, Wednesday, 12 August
Rain. High 92°, low 75°.
Pressure29.83 inHg
Wind8.8 mph NW
Humidity57%
Visibility6.2 mi
Dew point71°
Thu, 1384° / 71°0.32
84 °
Wood River, Thursday, 13 August
Light rain. High 84°, low 71°.
Pressure29.91 inHg
Wind13.6 mph E
Humidity70%
Visibility—
Dew point71°
Fri, 1472° / 66°0.15
72 °
Wood River, Friday, 14 August
Light rain. High 72°, low 66°.
Pressure30.06 inHg
Wind14.9 mph E
Humidity84%
Visibility—
Dew point64°
Sat, 1585° / 65°0.1
85 °
Wood River, Saturday, 15 August
Light rain. High 85°, low 65°.
Pressure30.12 inHg
Wind11.8 mph SE
Humidity79%
Visibility—
Dew point69°
Sun, 1688° / 70°0
88 °
Wood River, Sunday, 16 August
Overcast. High 88°, low 70°.
Pressure30.03 inHg
Wind9.8 mph E
Humidity68%
Visibility—
Dew point73°
Mon, 1785° / 71°0
85 °
Wood River, Monday, 17 August
Partly cloudy. High 85°, low 71°.
Pressure30.06 inHg
Wind6.5 mph E
Humidity64%
Visibility—
Dew point69°
Tue, 1890° / 68°0.01
90 °
Wood River, Tuesday, 18 August
Light rain. High 90°, low 68°.
Pressure29.97 inHg
Wind10.5 mph SE
Humidity61%
Visibility—
Dew point68°
Wed, 19105° / 76°0
105 °
Wood River, Wednesday, 19 August
Partly cloudy. High 105°, low 76°.
Pressure29.88 inHg
Wind11.3 mph SE
Humidity37%
Visibility—
Dew point66°
Thu, 20113° / 81°0
113 °
Wood River, Thursday, 20 August
Mostly clear. High 113°, low 81°.
Pressure29.80 inHg
Wind12.2 mph W
Humidity25%
Visibility—
Dew point61°
Fri, 2197° / 81°0
97 °
Wood River, Friday, 21 August
Clear. High 97°, low 81°.
Pressure29.85 inHg
Wind8.8 mph N
Humidity41%
Visibility—
Dew point67°
Sat, 22106° / 79°0
106 °
Wood River, Saturday, 22 August
Clear. High 106°, low 79°.
Pressure29.83 inHg
Wind8.4 mph SE
Humidity26%
Visibility—
Dew point60°
Sun, 23107° / 79°0.01
107 °
Wood River, Sunday, 23 August
Light rain. High 107°, low 79°.
Pressure29.85 inHg
Wind9.6 mph SW
Humidity32%
Visibility—
Dew point64°
Mon, 2496° / 76°0.03
96 °
Wood River, Monday, 24 August
Light rain. High 96°, low 76°.
Pressure30.00 inHg
Wind8.9 mph E
Humidity53%
Visibility—
Dew point70°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2586° / 69°0.06
86 °
Wood River, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high86°
Average low69°
Average precipitation0.06 in
Chance of precipitation23%
Record high98° (2023)
Record low58° (1966)
Wed, 2686° / 69°0.11
86 °
Wood River, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high86°
Average low69°
Average precipitation0.11 in
Chance of precipitation32%
Record high97° (1983)
Record low54° (2025)
Thu, 2786° / 69°0.14
86 °
Wood River, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high86°
Average low69°
Average precipitation0.14 in
Chance of precipitation30%
Record high97° (1983)
Record low56° (2025)
Fri, 2886° / 69°0.09
86 °
Wood River, Friday, 28 August
Climate normal for this date — 60-year average.
Average high86°
Average low69°
Average precipitation0.09 in
Chance of precipitation28%
Record high97° (1990)
Record low55° (1986)
Sat, 2985° / 68°0.07
85 °
Wood River, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high85°
Average low68°
Average precipitation0.07 in
Chance of precipitation28%
Record high97° (1984)
Record low52° (1986)
Sun, 3084° / 68°0.12
84 °
Wood River, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high84°
Average low68°
Average precipitation0.12 in
Chance of precipitation27%
Record high97° (2013)
Record low52° (1986)
Mon, 3184° / 68°0.11
84 °
Wood River, Monday, 31 August
Climate normal for this date — 60-year average.
Average high84°
Average low68°
Average precipitation0.11 in
Chance of precipitation32%
Record high101° (2013)
Record low56° (1967)
Tue, 0184° / 68°0.12
84 °
Wood River, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high84°
Average low68°
Average precipitation0.12 in
Chance of precipitation32%
Record high99° (2011)
Record low53° (1967)
Wed, 0283° / 67°0.1
83 °
Wood River, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high83°
Average low67°
Average precipitation0.1 in
Chance of precipitation33%
Record high98° (2011)
Record low53° (1974)
Thu, 0383° / 67°0.09
83 °
Wood River, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high83°
Average low67°
Average precipitation0.09 in
Chance of precipitation28%
Record high95° (2011)
Record low51° (1974)
Fri, 0482° / 66°0.12
82 °
Wood River, Friday, 4 September
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.12 in
Chance of precipitation30%
Record high96° (1960)
Record low53° (1974)
Sat, 0583° / 66°0.04
83 °
Wood River, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.04 in
Chance of precipitation13%
Record high97° (1998)
Record low53° (1974)
Sun, 0683° / 66°0.05
83 °
Wood River, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.05 in
Chance of precipitation20%
Record high97° (1990)
Record low54° (1988)
Mon, 0783° / 65°0.08
83 °
Wood River, Monday, 7 September
Climate normal for this date — 60-year average.
Average high83°
Average low65°
Average precipitation0.08 in
Chance of precipitation25%
Record high96° (1960)
Record low51° (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 Wood River, 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 Wood River, 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.