Monthly outlook for Mount Zion, IN: average high 83.6°, average low 65.7°. That is 2° above the climate normal for August. Precipitation is expected on 7 days (about 2.6 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 23 August (94.5°), the coolest 14 August (55°).
83.6°/65.7°
Average high / low
+2°
Above normal
7 / 5
Wet days / normal
2.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
80.2°
80.1°
+0.1°
19 August – 28 August
89.4°
80.1°
+5.2°
29 August – 7 September
at normal
78.9°
—
August records over 66 years
95.7°17 August 1988All-time high
43.3°29 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Rochester (4 mi).
Mon, 1092° / 72°0.89
92 °
Mount Zion, Monday, 10 August
Heavy rain. High 92°, low 72°.
Pressure29.91 inHg
Wind12.3 mph SW
Humidity72%
Visibility6.2 mi
Dew point73°
Tue, 1187° / 68°1.04
87 °
Mount Zion, Tuesday, 11 August
Heavy rain. High 87°, low 68°.
Pressure29.88 inHg
Wind11.2 mph SW
Humidity75%
Visibility6.2 mi
Dew point74°
Wed, 1281° / 69°0.18
81 °
Mount Zion, Wednesday, 12 August
Rain. High 81°, low 69°.
Pressure29.80 inHg
Wind4.8 mph N
Humidity73%
Visibility6.2 mi
Dew point70°
Thu, 1374° / 62°0
74 °
Mount Zion, Thursday, 13 August
Overcast. High 74°, low 62°.
Pressure30.00 inHg
Wind9.4 mph N
Humidity64%
Visibility—
Dew point60°
Fri, 1473° / 55°0.05
73 °
Mount Zion, Friday, 14 August
Light rain. High 73°, low 55°.
Pressure30.15 inHg
Wind8.5 mph E
Humidity57%
Visibility—
Dew point54°
Sat, 1573° / 59°0
73 °
Mount Zion, Saturday, 15 August
Overcast. High 73°, low 59°.
Pressure30.27 inHg
Wind9.7 mph SE
Humidity65%
Visibility—
Dew point57°
Sun, 1676° / 59°0.1
76 °
Mount Zion, Sunday, 16 August
Light rain. High 76°, low 59°.
Pressure30.09 inHg
Wind9 mph SE
Humidity68%
Visibility—
Dew point61°
Mon, 1779° / 63°0.01
79 °
Mount Zion, Monday, 17 August
Light rain. High 79°, low 63°.
Pressure30.06 inHg
Wind6.9 mph N
Humidity62%
Visibility—
Dew point62°
Tue, 1879° / 64°0
79 °
Mount Zion, Tuesday, 18 August
Mostly clear. High 79°, low 64°.
Pressure30.06 inHg
Wind5.4 mph S
Humidity64%
Visibility—
Dew point64°
Wed, 1983° / 65°0.02
83 °
Mount Zion, Wednesday, 19 August
Light rain. High 83°, low 65°.
Pressure30.03 inHg
Wind12.5 mph S
Humidity71%
Visibility—
Dew point67°
Thu, 2092° / 71°0
92 °
Mount Zion, Thursday, 20 August
Overcast. High 92°, low 71°.
Pressure29.83 inHg
Wind13 mph SW
Humidity62%
Visibility—
Dew point72°
Fri, 2191° / 72°0
91 °
Mount Zion, Friday, 21 August
Clear. High 91°, low 72°.
Pressure29.88 inHg
Wind10.8 mph NE
Humidity58%
Visibility—
Dew point71°
Sat, 2289° / 70°0
89 °
Mount Zion, Saturday, 22 August
Mostly clear. High 89°, low 70°.
Pressure29.91 inHg
Wind11.1 mph SE
Humidity60%
Visibility—
Dew point70°
Sun, 2395° / 72°0.04
95 °
Mount Zion, Sunday, 23 August
Light rain. High 95°, low 72°.
Pressure29.83 inHg
Wind13.3 mph S
Humidity43%
Visibility—
Dew point67°
Mon, 2487° / 69°0.23
87 °
Mount Zion, Monday, 24 August
Rain. High 87°, low 69°.
Pressure30.03 inHg
Wind9.4 mph E
Humidity67%
Visibility—
Dew point68°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2580° / 63°0.07
80 °
Mount Zion, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.07 in
Chance of precipitation27%
Record high91° (2003)
Record low51° (2017)
Wed, 2681° / 64°0.11
81 °
Mount Zion, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.11 in
Chance of precipitation30%
Record high92° (2020)
Record low52° (2025)
Thu, 2781° / 65°0.12
81 °
Mount Zion, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.12 in
Chance of precipitation35%
Record high93° (2024)
Record low51° (2025)
Fri, 2880° / 64°0.13
80 °
Mount Zion, Friday, 28 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.13 in
Chance of precipitation38%
Record high90° (2022)
Record low47° (1986)
Sat, 2980° / 63°0.11
80 °
Mount Zion, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.11 in
Chance of precipitation38%
Record high91° (1991)
Record low43° (1986)
Sun, 3079° / 63°0.07
79 °
Mount Zion, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high79°
Average low63°
Average precipitation0.07 in
Chance of precipitation37%
Record high91° (2024)
Record low47° (1986)
Mon, 3179° / 62°0.07
79 °
Mount Zion, Monday, 31 August
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.07 in
Chance of precipitation28%
Record high91° (2012)
Record low47° (2009)
Tue, 0179° / 62°0.15
79 °
Mount Zion, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.15 in
Chance of precipitation25%
Record high95° (2011)
Record low47° (1967)
Wed, 0279° / 62°0.07
79 °
Mount Zion, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.07 in
Chance of precipitation27%
Record high95° (2011)
Record low47° (1965)
Thu, 0379° / 62°0.08
79 °
Mount Zion, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.08 in
Chance of precipitation27%
Record high93° (2011)
Record low47° (1974)
Fri, 0478° / 61°0.07
78 °
Mount Zion, Friday, 4 September
Climate normal for this date — 60-year average.
Average high78°
Average low61°
Average precipitation0.07 in
Chance of precipitation27%
Record high91° (1999)
Record low47° (1997)
Sat, 0578° / 61°0.04
78 °
Mount Zion, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high78°
Average low61°
Average precipitation0.04 in
Chance of precipitation27%
Record high91° (2007)
Record low47° (1974)
Sun, 0678° / 61°0.07
78 °
Mount Zion, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high78°
Average low61°
Average precipitation0.07 in
Chance of precipitation25%
Record high91° (1990)
Record low47° (1962)
Mon, 0778° / 60°0.12
78 °
Mount Zion, Monday, 7 September
Climate normal for this date — 60-year average.
Average high78°
Average low60°
Average precipitation0.12 in
Chance of precipitation35%
Record high90° (2002)
Record low45° (1962)
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 Mount Zion, IN 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 Mount Zion, IN 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.