Monthly outlook for Valley Mission, IL: average high 97.7°, average low 73.3°. That is 6.1° above the climate normal for August. Precipitation is expected on 3 days (about 1.2 inches), against a normal of 4 days and 1.6 inches. The warmest day looks like 20 August (103.6°), the coolest 23 August (68°).
97.7°/73.3°
Average high / low
+6.1°
Above normal
3 / 4
Wet days / normal
1.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
97.1°
86.6°
+5.8°
19 August – 28 August
98.8°
87°
+6.6°
29 August – 7 September
at normal
84.8°
—
August records over 66 years
104°16 August 2007All-time high
53.4°29 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Scott City (14 mi).
Mon, 1096° / 74°0
96 °
Valley Mission, Monday, 10 August
Clear. High 96°, low 74°.
Pressure30.03 inHg
Wind12.9 mph SW
Humidity52%
Visibility6.2 mi
Dew point71°
Tue, 1197° / 76°0
97 °
Valley Mission, Tuesday, 11 August
Clear. High 97°, low 76°.
Pressure29.94 inHg
Wind12.4 mph SW
Humidity48%
Visibility6.2 mi
Dew point70°
Wed, 1298° / 71°1.04
98 °
Valley Mission, Wednesday, 12 August
Heavy rain. High 98°, low 71°.
Pressure29.88 inHg
Wind4.9 mph W
Humidity51%
Visibility6.2 mi
Dew point71°
Thu, 1388° / 70°0.05
88 °
Valley Mission, Thursday, 13 August
Light rain. High 88°, low 70°.
Pressure29.97 inHg
Wind7 mph S
Humidity73%
Visibility6.2 mi
Dew point72°
Fri, 1497° / 75°0
97 °
Valley Mission, Friday, 14 August
Partly cloudy. High 97°, low 75°.
Pressure29.97 inHg
Wind10.6 mph S
Humidity46%
Visibility—
Dew point68°
Sat, 15100° / 75°0
100 °
Valley Mission, Saturday, 15 August
Clear. High 100°, low 75°.
Pressure30.03 inHg
Wind10.8 mph SW
Humidity40%
Visibility—
Dew point64°
Sun, 16101° / 76°0.08
101 °
Valley Mission, Sunday, 16 August
Light rain. High 101°, low 76°.
Pressure29.97 inHg
Wind9.3 mph W
Humidity43%
Visibility—
Dew point66°
Mon, 1799° / 74°0
99 °
Valley Mission, Monday, 17 August
Partly cloudy. High 99°, low 74°.
Pressure29.97 inHg
Wind7.8 mph S
Humidity50%
Visibility—
Dew point70°
Tue, 18103° / 76°0
103 °
Valley Mission, Tuesday, 18 August
Clear. High 103°, low 76°.
Pressure29.94 inHg
Wind11.3 mph SW
Humidity33%
Visibility—
Dew point62°
Wed, 19102° / 77°0
102 °
Valley Mission, Wednesday, 19 August
Clear. High 102°, low 77°.
Pressure29.97 inHg
Wind8.1 mph SE
Humidity34%
Visibility—
Dew point64°
Thu, 20104° / 74°0.03
104 °
Valley Mission, Thursday, 20 August
Light rain. High 104°, low 74°.
Pressure29.85 inHg
Wind12 mph SW
Humidity32%
Visibility—
Dew point62°
Fri, 2199° / 74°0
99 °
Valley Mission, Friday, 21 August
Clear. High 99°, low 74°.
Pressure29.83 inHg
Wind10.2 mph SW
Humidity36%
Visibility—
Dew point63°
Sat, 2292° / 70°0
92 °
Valley Mission, Saturday, 22 August
Mostly clear. High 92°, low 70°.
Pressure29.91 inHg
Wind9.4 mph N
Humidity40%
Visibility—
Dew point59°
Sun, 2396° / 68°0
96 °
Valley Mission, Sunday, 23 August
Clear. High 96°, low 68°.
Pressure29.97 inHg
Wind6.4 mph NE
Humidity38%
Visibility—
Dew point60°
Mon, 2499° / 72°0.01
99 °
Valley Mission, Monday, 24 August
Light rain. High 99°, low 72°.
Pressure30.00 inHg
Wind9.7 mph SE
Humidity32%
Visibility—
Dew point60°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2587° / 70°0.04
87 °
Valley Mission, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high87°
Average low70°
Average precipitation0.04 in
Chance of precipitation18%
Record high100° (2023)
Record low59° (2015)
Wed, 2688° / 71°0.06
88 °
Valley Mission, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high88°
Average low71°
Average precipitation0.06 in
Chance of precipitation20%
Record high100° (1983)
Record low56° (2025)
Thu, 2787° / 71°0.1
87 °
Valley Mission, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high87°
Average low71°
Average precipitation0.1 in
Chance of precipitation25%
Record high97° (2024)
Record low58° (2025)
Fri, 2887° / 70°0.09
87 °
Valley Mission, Friday, 28 August
Climate normal for this date — 60-year average.
Average high87°
Average low70°
Average precipitation0.09 in
Chance of precipitation25%
Record high97° (1983)
Record low56° (1967)
Sat, 2986° / 70°0.11
86 °
Valley Mission, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high86°
Average low70°
Average precipitation0.11 in
Chance of precipitation33%
Record high100° (2000)
Record low53° (1986)
Sun, 3086° / 69°0.11
86 °
Valley Mission, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high86°
Average low69°
Average precipitation0.11 in
Chance of precipitation22%
Record high96° (1984)
Record low55° (1986)
Mon, 3186° / 69°0.06
86 °
Valley Mission, Monday, 31 August
Climate normal for this date — 60-year average.
Average high86°
Average low69°
Average precipitation0.06 in
Chance of precipitation35%
Record high96° (2011)
Record low58° (2009)
Tue, 0185° / 69°0.08
85 °
Valley Mission, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high85°
Average low69°
Average precipitation0.08 in
Chance of precipitation28%
Record high97° (2011)
Record low55° (1967)
Wed, 0285° / 69°0.13
85 °
Valley Mission, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high85°
Average low69°
Average precipitation0.13 in
Chance of precipitation25%
Record high96° (2011)
Record low57° (1965)
Thu, 0384° / 69°0.09
84 °
Valley Mission, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high84°
Average low69°
Average precipitation0.09 in
Chance of precipitation30%
Record high99° (2011)
Record low56° (1974)
Fri, 0484° / 68°0.09
84 °
Valley Mission, Friday, 4 September
Climate normal for this date — 60-year average.
Average high84°
Average low68°
Average precipitation0.09 in
Chance of precipitation27%
Record high97° (1999)
Record low54° (1974)
Sat, 0583° / 67°0.11
83 °
Valley Mission, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high83°
Average low67°
Average precipitation0.11 in
Chance of precipitation27%
Record high97° (1999)
Record low54° (1997)
Sun, 0684° / 67°0.03
84 °
Valley Mission, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high84°
Average low67°
Average precipitation0.03 in
Chance of precipitation18%
Record high96° (1990)
Record low54° (1988)
Mon, 0784° / 67°0.05
84 °
Valley Mission, Monday, 7 September
Climate normal for this date — 60-year average.
Average high84°
Average low67°
Average precipitation0.05 in
Chance of precipitation20%
Record high98° (1990)
Record low51° (1988)
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 Valley Mission, 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 Valley Mission, 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.