Monthly outlook for Garrettsburg, MO: average high 99.9°, average low 69.9°. That is 8.3° above the climate normal for August. Precipitation is expected on 2 days (about 0.4 inches), against a normal of 5 days and 1.9 inches. The warmest day looks like 21 August (112.8°), the coolest 17 August (63°).
99.9°/69.9°
Average high / low
+8.3°
Above normal
2 / 5
Wet days / normal
0.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
99.6°
84.9°
+8.1°
19 August – 28 August
100.4°
85°
+8.6°
29 August – 7 September
at normal
82.6°
—
August records over 66 years
102.7°29 August 1984All-time high
49.8°28 August 1986All-time low
Climate normals and records are computed from the nearest reference point — St. Joseph (8 mi).
Mon, 1099° / 78°0
99 °
Garrettsburg, Monday, 10 August
Overcast. High 99°, low 78°.
Pressure29.85 inHg
Wind14.8 mph SW
Humidity35%
Visibility6.2 mi
Dew point63°
Tue, 11108° / 75°0.02
108 °
Garrettsburg, Tuesday, 11 August
Light rain. High 108°, low 75°.
Pressure29.77 inHg
Wind16.8 mph SW
Humidity29%
Visibility6.2 mi
Dew point62°
Wed, 12101° / 69°0.05
101 °
Garrettsburg, Wednesday, 12 August
Light rain. High 101°, low 69°.
Pressure29.77 inHg
Wind4.6 mph SW
Humidity35%
Visibility6.2 mi
Dew point63°
Thu, 13101° / 72°0.28
101 °
Garrettsburg, Thursday, 13 August
Rain. High 101°, low 72°.
Pressure29.71 inHg
Wind14.9 mph E
Humidity32%
Visibility—
Dew point60°
Fri, 1492° / 69°0.03
92 °
Garrettsburg, Friday, 14 August
Light rain. High 92°, low 69°.
Pressure29.94 inHg
Wind17.2 mph E
Humidity53%
Visibility—
Dew point65°
Sat, 15109° / 71°0
109 °
Garrettsburg, Saturday, 15 August
Overcast. High 109°, low 71°.
Pressure29.94 inHg
Wind14.7 mph N
Humidity30%
Visibility—
Dew point59°
Sun, 1694° / 70°0
94 °
Garrettsburg, Sunday, 16 August
Overcast. High 94°, low 70°.
Pressure30.09 inHg
Wind12.8 mph NE
Humidity42%
Visibility—
Dew point61°
Mon, 1785° / 63°0
85 °
Garrettsburg, Monday, 17 August
Overcast. High 85°, low 63°.
Pressure30.06 inHg
Wind10.4 mph E
Humidity39%
Visibility—
Dew point52°
Tue, 18105° / 65°0.02
105 °
Garrettsburg, Tuesday, 18 August
Light rain. High 105°, low 65°.
Pressure29.74 inHg
Wind12.9 mph N
Humidity32%
Visibility—
Dew point59°
Wed, 1998° / 75°0
98 °
Garrettsburg, Wednesday, 19 August
Clear. High 98°, low 75°.
Pressure29.91 inHg
Wind15.3 mph N
Humidity24%
Visibility—
Dew point51°
Thu, 2098° / 66°0
98 °
Garrettsburg, Thursday, 20 August
Partly cloudy. High 98°, low 66°.
Pressure29.91 inHg
Wind8.2 mph SE
Humidity28%
Visibility—
Dew point53°
Fri, 21113° / 70°0
113 °
Garrettsburg, Friday, 21 August
Clear. High 113°, low 70°.
Pressure29.65 inHg
Wind16.8 mph N
Humidity21%
Visibility—
Dew point53°
Sat, 22101° / 71°0
101 °
Garrettsburg, Saturday, 22 August
Clear. High 101°, low 71°.
Pressure29.88 inHg
Wind14.9 mph N
Humidity23%
Visibility—
Dew point52°
Sun, 2395° / 63°0
95 °
Garrettsburg, Sunday, 23 August
Partly cloudy. High 95°, low 63°.
Pressure30.09 inHg
Wind9.1 mph SE
Humidity22%
Visibility—
Dew point44°
Mon, 2498° / 65°0
98 °
Garrettsburg, Monday, 24 August
Clear. High 98°, low 65°.
Pressure30.09 inHg
Wind14.8 mph S
Humidity24%
Visibility—
Dew point48°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2586° / 68°0.18
86 °
Garrettsburg, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high86°
Average low68°
Average precipitation0.18 in
Chance of precipitation27%
Record high101° (2003)
Record low56° (2025)
Wed, 2685° / 68°0.2
85 °
Garrettsburg, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high85°
Average low68°
Average precipitation0.2 in
Chance of precipitation35%
Record high100° (2003)
Record low55° (2025)
Thu, 2785° / 69°0.11
85 °
Garrettsburg, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high85°
Average low69°
Average precipitation0.11 in
Chance of precipitation30%
Record high97° (1983)
Record low55° (1967)
Fri, 2885° / 67°0.16
85 °
Garrettsburg, Friday, 28 August
Climate normal for this date — 60-year average.
Average high85°
Average low67°
Average precipitation0.16 in
Chance of precipitation25%
Record high101° (1984)
Record low50° (1986)
Sat, 2984° / 67°0.07
84 °
Garrettsburg, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high84°
Average low67°
Average precipitation0.07 in
Chance of precipitation20%
Record high103° (1984)
Record low54° (1974)
Sun, 3083° / 67°0.13
83 °
Garrettsburg, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high83°
Average low67°
Average precipitation0.13 in
Chance of precipitation33%
Record high98° (2013)
Record low53° (2009)
Mon, 3183° / 67°0.15
83 °
Garrettsburg, Monday, 31 August
Climate normal for this date — 60-year average.
Average high83°
Average low67°
Average precipitation0.15 in
Chance of precipitation32%
Record high98° (2000)
Record low54° (1967)
Tue, 0183° / 67°0.14
83 °
Garrettsburg, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high83°
Average low67°
Average precipitation0.14 in
Chance of precipitation30%
Record high100° (2011)
Record low52° (1967)
Wed, 0283° / 66°0.09
83 °
Garrettsburg, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.09 in
Chance of precipitation30%
Record high97° (2000)
Record low52° (1974)
Thu, 0383° / 66°0.07
83 °
Garrettsburg, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.07 in
Chance of precipitation22%
Record high93° (2000)
Record low46° (1974)
Fri, 0482° / 65°0.09
82 °
Garrettsburg, Friday, 4 September
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.09 in
Chance of precipitation23%
Record high93° (1990)
Record low45° (1974)
Sat, 0582° / 65°0.11
82 °
Garrettsburg, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.11 in
Chance of precipitation22%
Record high94° (1990)
Record low47° (1974)
Sun, 0682° / 65°0.09
82 °
Garrettsburg, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.09 in
Chance of precipitation20%
Record high96° (1990)
Record low50° (1988)
Mon, 0781° / 65°0.14
81 °
Garrettsburg, Monday, 7 September
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.14 in
Chance of precipitation30%
Record high97° (2013)
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 Garrettsburg, 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 Garrettsburg, 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.