Monthly outlook for West Harrison, IN: average high 83.6°, average low 66.3°. That is 0.5° above the climate normal for August. Precipitation is expected on 5 days (about 2.2 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 10 August (93.5°), the coolest 21 August (57°).
83.6°/66.3°
Average high / low
+0.5°
Above normal
5 / 5
Wet days / normal
2.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
84.2°
82.7°
+0.9°
19 August – 28 August
82.6°
82.7°
-0.1°
29 August – 7 September
at normal
80.9°
—
August records over 66 years
99.3°17 August 1988All-time high
48.6°29 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Brookville (15 mi).
Mon, 1093° / 75°0
93 °
West Harrison, Monday, 10 August
Light rain. High 93°, low 75°.
Pressure30.03 inHg
Wind11.6 mph W
Humidity58%
Visibility6.2 mi
Dew point70°
Tue, 1191° / 69°1.28
91 °
West Harrison, Tuesday, 11 August
Heavy rain. High 91°, low 69°.
Pressure29.97 inHg
Wind15.3 mph S
Humidity96%
Visibility6.2 mi
Dew point69°
Wed, 1287° / 72°0.29
87 °
West Harrison, Wednesday, 12 August
Rain. High 87°, low 72°.
Pressure29.80 inHg
Wind6.3 mph W
Humidity68%
Visibility6.2 mi
Dew point73°
Thu, 1382° / 65°0.02
82 °
West Harrison, Thursday, 13 August
Light rain. High 82°, low 65°.
Pressure30.00 inHg
Wind6.7 mph NE
Humidity50%
Visibility—
Dew point59°
Fri, 1475° / 65°0.38
75 °
West Harrison, Friday, 14 August
Rain. High 75°, low 65°.
Pressure30.12 inHg
Wind5.5 mph NE
Humidity89%
Visibility—
Dew point64°
Sat, 1579° / 60°0.02
79 °
West Harrison, Saturday, 15 August
Light rain. High 79°, low 60°.
Pressure30.24 inHg
Wind6 mph E
Humidity47%
Visibility—
Dew point55°
Sun, 1681° / 66°0
81 °
West Harrison, Sunday, 16 August
Overcast. High 81°, low 66°.
Pressure30.12 inHg
Wind6.2 mph NE
Humidity48%
Visibility—
Dew point57°
Mon, 1779° / 68°0.08
79 °
West Harrison, Monday, 17 August
Light rain. High 79°, low 68°.
Pressure30.03 inHg
Wind4.6 mph N
Humidity66%
Visibility—
Dew point65°
Tue, 1884° / 65°0
84 °
West Harrison, Tuesday, 18 August
Partly cloudy. High 84°, low 65°.
Pressure30.00 inHg
Wind4.5 mph E
Humidity58%
Visibility—
Dew point65°
Wed, 1987° / 68°0.07
87 °
West Harrison, Wednesday, 19 August
Light rain. High 87°, low 68°.
Pressure29.88 inHg
Wind9.7 mph W
Humidity54%
Visibility—
Dew point66°
Thu, 2072° / 58°0
72 °
West Harrison, Thursday, 20 August
Mostly clear. High 72°, low 58°.
Pressure30.00 inHg
Wind13.4 mph N
Humidity63%
Visibility—
Dew point56°
Fri, 2175° / 57°0
75 °
West Harrison, Friday, 21 August
Overcast. High 75°, low 57°.
Pressure30.06 inHg
Wind6.6 mph N
Humidity48%
Visibility—
Dew point51°
Sat, 2282° / 59°0.02
82 °
West Harrison, Saturday, 22 August
Light rain. High 82°, low 59°.
Pressure29.94 inHg
Wind9.7 mph S
Humidity53%
Visibility—
Dew point58°
Sun, 2391° / 71°0.02
91 °
West Harrison, Sunday, 23 August
Light rain. High 91°, low 71°.
Pressure29.94 inHg
Wind10 mph W
Humidity47%
Visibility—
Dew point65°
Mon, 2488° / 70°0
88 °
West Harrison, Monday, 24 August
Overcast. High 88°, low 70°.
Pressure30.00 inHg
Wind4 mph NW
Humidity53%
Visibility—
Dew point67°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2583° / 66°0.06
83 °
West Harrison, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.06 in
Chance of precipitation32%
Record high93° (1998)
Record low56° (1984)
Wed, 2683° / 66°0.09
83 °
West Harrison, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.09 in
Chance of precipitation30%
Record high91° (2003)
Record low52° (2025)
Thu, 2783° / 67°0.1
83 °
West Harrison, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high83°
Average low67°
Average precipitation0.1 in
Chance of precipitation35%
Record high94° (2024)
Record low51° (2025)
Fri, 2883° / 67°0.16
83 °
West Harrison, Friday, 28 August
Climate normal for this date — 60-year average.
Average high83°
Average low67°
Average precipitation0.16 in
Chance of precipitation40%
Record high93° (2024)
Record low53° (1986)
Sat, 2982° / 66°0.12
82 °
West Harrison, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.12 in
Chance of precipitation35%
Record high94° (2007)
Record low49° (1986)
Sun, 3081° / 65°0.13
81 °
West Harrison, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.13 in
Chance of precipitation28%
Record high94° (2024)
Record low51° (1986)
Mon, 3181° / 65°0.07
81 °
West Harrison, Monday, 31 August
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.07 in
Chance of precipitation30%
Record high91° (1995)
Record low53° (2009)
Tue, 0181° / 65°0.08
81 °
West Harrison, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.08 in
Chance of precipitation30%
Record high95° (2011)
Record low51° (1967)
Wed, 0281° / 65°0.11
81 °
West Harrison, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.11 in
Chance of precipitation33%
Record high96° (2011)
Record low52° (1967)
Thu, 0381° / 65°0.11
81 °
West Harrison, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.11 in
Chance of precipitation30%
Record high96° (2011)
Record low53° (1974)
Fri, 0481° / 64°0.06
81 °
West Harrison, Friday, 4 September
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.06 in
Chance of precipitation23%
Record high92° (2007)
Record low51° (1997)
Sat, 0580° / 64°0.08
80 °
West Harrison, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.08 in
Chance of precipitation27%
Record high94° (2007)
Record low51° (1997)
Sun, 0680° / 63°0.04
80 °
West Harrison, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.04 in
Chance of precipitation17%
Record high94° (1998)
Record low50° (1962)
Mon, 0780° / 63°0.05
80 °
West Harrison, Monday, 7 September
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.05 in
Chance of precipitation23%
Record high94° (2002)
Record low49° (2017)
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 West Harrison, 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 West Harrison, 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.