Monthly outlook for Rensselaer, MO: average high 97.4°, average low 72.5°. That is 7.2° above the climate normal for August. Precipitation is expected on 7 days (about 1.0 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 20 August (115.3°), the coolest 14 August (63.1°).
97.4°/72.5°
Average high / low
+7.2°
Above normal
7 / 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
90.3°
84.5°
+3.2°
19 August – 28 August
109.1°
84.5°
+13.7°
29 August – 7 September
at normal
82.3°
—
August records over 66 years
102°15 August 2007All-time high
48.6°29 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Palmyra (9 mi).
Mon, 1097° / 78°0
97 °
Rensselaer, Monday, 10 August
Overcast. High 97°, low 78°.
Pressure29.91 inHg
Wind11.9 mph W
Humidity44%
Visibility6.2 mi
Dew point67°
Tue, 11102° / 74°0.04
102 °
Rensselaer, Tuesday, 11 August
Light rain. High 102°, low 74°.
Pressure29.83 inHg
Wind18.1 mph SW
Humidity39%
Visibility6.2 mi
Dew point67°
Wed, 1297° / 71°0.28
97 °
Rensselaer, Wednesday, 12 August
Heavy rain. High 97°, low 71°.
Pressure29.80 inHg
Wind5.8 mph N
Humidity46%
Visibility6.2 mi
Dew point67°
Thu, 1384° / 69°0.24
84 °
Rensselaer, Thursday, 13 August
Light rain. High 84°, low 69°.
Pressure29.91 inHg
Wind15.6 mph E
Humidity56%
Visibility—
Dew point65°
Fri, 1471° / 63°0.16
71 °
Rensselaer, Friday, 14 August
Light rain. High 71°, low 63°.
Pressure30.06 inHg
Wind16.8 mph E
Humidity78%
Visibility—
Dew point62°
Sat, 1586° / 65°0.16
86 °
Rensselaer, Saturday, 15 August
Light rain. High 86°, low 65°.
Pressure30.09 inHg
Wind13.8 mph SE
Humidity68%
Visibility—
Dew point66°
Sun, 1691° / 70°0
91 °
Rensselaer, Sunday, 16 August
Overcast. High 91°, low 70°.
Pressure30.06 inHg
Wind10.4 mph N
Humidity56%
Visibility—
Dew point68°
Mon, 1787° / 68°0
87 °
Rensselaer, Monday, 17 August
Partly cloudy. High 87°, low 68°.
Pressure30.06 inHg
Wind7.4 mph NE
Humidity47%
Visibility—
Dew point62°
Tue, 1894° / 68°0.02
94 °
Rensselaer, Tuesday, 18 August
Light rain. High 94°, low 68°.
Pressure29.94 inHg
Wind11.7 mph SE
Humidity50%
Visibility—
Dew point67°
Wed, 19113° / 74°0
113 °
Rensselaer, Wednesday, 19 August
Overcast. High 113°, low 74°.
Pressure29.83 inHg
Wind14.3 mph W
Humidity19%
Visibility—
Dew point53°
Thu, 20115° / 85°0
115 °
Rensselaer, Thursday, 20 August
Clear. High 115°, low 85°.
Pressure29.77 inHg
Wind17 mph SW
Humidity17%
Visibility—
Dew point53°
Fri, 21105° / 76°0
105 °
Rensselaer, Friday, 21 August
Clear. High 105°, low 76°.
Pressure29.85 inHg
Wind15 mph NE
Humidity35%
Visibility—
Dew point65°
Sat, 22115° / 76°0.06
115 °
Rensselaer, Saturday, 22 August
Light rain. High 115°, low 76°.
Pressure29.77 inHg
Wind13.8 mph SW
Humidity14%
Visibility—
Dew point49°
Sun, 23108° / 76°0.05
108 °
Rensselaer, Sunday, 23 August
Light rain. High 108°, low 76°.
Pressure29.83 inHg
Wind16 mph SW
Humidity25%
Visibility—
Dew point57°
Mon, 2499° / 75°0.03
99 °
Rensselaer, Monday, 24 August
Light rain. High 99°, low 75°.
Pressure29.94 inHg
Wind11.1 mph SE
Humidity41%
Visibility—
Dew point64°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2585° / 68°0.12
85 °
Rensselaer, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high85°
Average low68°
Average precipitation0.12 in
Chance of precipitation25%
Record high98° (2003)
Record low55° (2015)
Wed, 2685° / 68°0.15
85 °
Rensselaer, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high85°
Average low68°
Average precipitation0.15 in
Chance of precipitation28%
Record high100° (2003)
Record low54° (2025)
Thu, 2785° / 69°0.07
85 °
Rensselaer, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high85°
Average low69°
Average precipitation0.07 in
Chance of precipitation28%
Record high96° (1983)
Record low55° (2025)
Fri, 2884° / 68°0.11
84 °
Rensselaer, Friday, 28 August
Climate normal for this date — 60-year average.
Average high84°
Average low68°
Average precipitation0.11 in
Chance of precipitation28%
Record high96° (1984)
Record low52° (1986)
Sat, 2984° / 68°0.05
84 °
Rensselaer, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high84°
Average low68°
Average precipitation0.05 in
Chance of precipitation20%
Record high96° (1984)
Record low49° (1986)
Sun, 3083° / 67°0.09
83 °
Rensselaer, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high83°
Average low67°
Average precipitation0.09 in
Chance of precipitation27%
Record high98° (2013)
Record low54° (2009)
Mon, 3183° / 67°0.11
83 °
Rensselaer, Monday, 31 August
Climate normal for this date — 60-year average.
Average high83°
Average low67°
Average precipitation0.11 in
Chance of precipitation25%
Record high96° (2013)
Record low54° (1967)
Tue, 0183° / 67°0.12
83 °
Rensselaer, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high83°
Average low67°
Average precipitation0.12 in
Chance of precipitation28%
Record high98° (2011)
Record low49° (1967)
Wed, 0282° / 66°0.1
82 °
Rensselaer, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.1 in
Chance of precipitation27%
Record high94° (2011)
Record low52° (1974)
Thu, 0382° / 66°0.1
82 °
Rensselaer, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.1 in
Chance of precipitation23%
Record high94° (1960)
Record low49° (1974)
Fri, 0481° / 65°0.07
81 °
Rensselaer, Friday, 4 September
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.07 in
Chance of precipitation17%
Record high94° (1960)
Record low44° (1974)
Sat, 0582° / 65°0.03
82 °
Rensselaer, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.03 in
Chance of precipitation18%
Record high95° (1990)
Record low50° (1974)
Sun, 0681° / 65°0.06
81 °
Rensselaer, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.06 in
Chance of precipitation25%
Record high96° (1990)
Record low49° (1974)
Mon, 0782° / 64°0.1
82 °
Rensselaer, Monday, 7 September
Climate normal for this date — 60-year average.
Average high82°
Average low64°
Average precipitation0.1 in
Chance of precipitation23%
Record high94° (2013)
Record low48° (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 Rensselaer, 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 Rensselaer, 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.