Monthly outlook for Shamrock, MO: average high 86.5°, average low 68.8°. That is 0.7° above the climate normal for August. Precipitation is expected on 7 days (about 1.6 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 11 August (102.9°), the coolest 21 August (57.4°).
86.5°/68.8°
Average high / low
+0.7°
Above normal
7 / 5
Wet days / normal
1.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
87.9°
85.2°
+1.5°
18 August – 27 August
84°
85.4°
-0.7°
28 August – 6 September
at normal
83.3°
—
August records over 66 years
104.2°14 August 2007All-time high
50.7°29 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Martinsburg (7 mi).
Sun, 0995° / 73°0
95 °
Shamrock, Sunday, 9 August
Overcast. High 95°, low 73°.
Pressure29.91 inHg
Wind14.9 mph SW
Humidity49%
Visibility6.2 mi
Dew point69°
Mon, 10100° / 76°0
100 °
Shamrock, Monday, 10 August
Light rain. High 100°, low 76°.
Pressure29.91 inHg
Wind13.4 mph SW
Humidity45%
Visibility6.2 mi
Dew point69°
Tue, 11103° / 79°0
103 °
Shamrock, Tuesday, 11 August
Overcast. High 103°, low 79°.
Pressure29.83 inHg
Wind16.2 mph SW
Humidity39%
Visibility6.2 mi
Dew point67°
Wed, 1289° / 72°0.2
89 °
Shamrock, Wednesday, 12 August
Rain. High 89°, low 72°.
Pressure29.85 inHg
Wind6.8 mph NW
Humidity57%
Visibility6.2 mi
Dew point71°
Thu, 1382° / 71°0.6
82 °
Shamrock, Thursday, 13 August
Rain. High 82°, low 71°.
Pressure29.85 inHg
Wind16.5 mph NE
Humidity72%
Visibility—
Dew point70°
Fri, 1475° / 68°0.27
75 °
Shamrock, Friday, 14 August
Light rain. High 75°, low 68°.
Pressure30.03 inHg
Wind12.6 mph E
Humidity91%
Visibility—
Dew point70°
Sat, 1585° / 68°0.18
85 °
Shamrock, Saturday, 15 August
Light rain. High 85°, low 68°.
Pressure30.12 inHg
Wind13.7 mph E
Humidity78%
Visibility—
Dew point68°
Sun, 1677° / 69°0
77 °
Shamrock, Sunday, 16 August
Overcast. High 77°, low 69°.
Pressure30.09 inHg
Wind10 mph E
Humidity84%
Visibility—
Dew point69°
Mon, 1784° / 68°0.09
84 °
Shamrock, Monday, 17 August
Light rain. High 84°, low 68°.
Pressure30.03 inHg
Wind8.8 mph NE
Humidity69%
Visibility—
Dew point70°
Tue, 1884° / 69°0.08
84 °
Shamrock, Tuesday, 18 August
Light rain. High 84°, low 69°.
Pressure29.97 inHg
Wind5.5 mph E
Humidity89%
Visibility—
Dew point70°
Wed, 1987° / 68°0
87 °
Shamrock, Wednesday, 19 August
Overcast. High 87°, low 68°.
Pressure29.91 inHg
Wind12.6 mph NE
Humidity57%
Visibility—
Dew point68°
Thu, 2078° / 60°0
78 °
Shamrock, Thursday, 20 August
Mostly clear. High 78°, low 60°.
Pressure30.03 inHg
Wind13 mph E
Humidity49%
Visibility—
Dew point54°
Fri, 2174° / 57°0.16
74 °
Shamrock, Friday, 21 August
Light rain. High 74°, low 57°.
Pressure30.03 inHg
Wind13.2 mph E
Humidity59%
Visibility—
Dew point56°
Sat, 2287° / 63°0.01
87 °
Shamrock, Saturday, 22 August
Light rain. High 87°, low 63°.
Pressure29.83 inHg
Wind13.6 mph SE
Humidity56%
Visibility—
Dew point65°
Sun, 2394° / 69°0
94 °
Shamrock, Sunday, 23 August
Clear. High 94°, low 69°.
Pressure29.94 inHg
Wind7.8 mph NE
Humidity47%
Visibility—
Dew point66°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2485° / 68°0.08
85 °
Shamrock, Monday, 24 August
Climate normal for this date — 60-year average.
Average high85°
Average low68°
Average precipitation0.08 in
Chance of precipitation23%
Record high100° (2023)
Record low56° (2015)
Tue, 2586° / 68°0.09
86 °
Shamrock, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high86°
Average low68°
Average precipitation0.09 in
Chance of precipitation25%
Record high100° (2003)
Record low56° (2025)
Wed, 2686° / 69°0.17
86 °
Shamrock, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high86°
Average low69°
Average precipitation0.17 in
Chance of precipitation27%
Record high100° (2003)
Record low53° (2025)
Thu, 2785° / 69°0.09
85 °
Shamrock, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high85°
Average low69°
Average precipitation0.09 in
Chance of precipitation30%
Record high97° (1983)
Record low54° (2025)
Fri, 2885° / 68°0.1
85 °
Shamrock, Friday, 28 August
Climate normal for this date — 60-year average.
Average high85°
Average low68°
Average precipitation0.1 in
Chance of precipitation28%
Record high99° (2000)
Record low52° (1986)
Sat, 2985° / 68°0.07
85 °
Shamrock, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high85°
Average low68°
Average precipitation0.07 in
Chance of precipitation25%
Record high100° (1984)
Record low51° (1986)
Sun, 3084° / 67°0.1
84 °
Shamrock, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high84°
Average low67°
Average precipitation0.1 in
Chance of precipitation27%
Record high98° (2013)
Record low55° (1986)
Mon, 3183° / 67°0.1
83 °
Shamrock, Monday, 31 August
Climate normal for this date — 60-year average.
Average high83°
Average low67°
Average precipitation0.1 in
Chance of precipitation32%
Record high98° (2013)
Record low55° (1967)
Tue, 0183° / 67°0.12
83 °
Shamrock, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high83°
Average low67°
Average precipitation0.12 in
Chance of precipitation25%
Record high99° (2011)
Record low52° (1967)
Wed, 0283° / 66°0.13
83 °
Shamrock, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.13 in
Chance of precipitation33%
Record high96° (2011)
Record low51° (1974)
Thu, 0383° / 66°0.08
83 °
Shamrock, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.08 in
Chance of precipitation27%
Record high94° (2000)
Record low48° (1974)
Fri, 0482° / 65°0.09
82 °
Shamrock, Friday, 4 September
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.09 in
Chance of precipitation17%
Record high95° (1990)
Record low46° (1974)
Sat, 0582° / 65°0.05
82 °
Shamrock, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.05 in
Chance of precipitation22%
Record high98° (1998)
Record low51° (1974)
Sun, 0682° / 65°0.05
82 °
Shamrock, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.05 in
Chance of precipitation23%
Record high99° (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 Shamrock, MO 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 Shamrock, MO 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.