Monthly outlook for Fort Branch, IN: average high 85.6°, average low 68.8°. That is 0.2° above the climate normal for August. Precipitation is expected on 6 days (about 1.4 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 12 August (94.3°), the coolest 21 August (57.7°).
85.6°/68.8°
Average high / low
+0.2°
Above normal
6 / 5
Wet days / normal
1.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
87.2°
85.3°
+1.1°
19 August – 28 August
82.9°
85.5°
-1.4°
29 August – 7 September
at normal
83.6°
—
August records over 66 years
102.2°15 August 2007All-time high
51.8°29 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Lynnville (14 mi).
Mon, 1094° / 76°0
94 °
Fort Branch, Monday, 10 August
Clear. High 94°, low 76°.
Pressure30.00 inHg
Wind14.5 mph SW
Humidity64%
Visibility6.2 mi
Dew point74°
Tue, 1194° / 76°0
94 °
Fort Branch, Tuesday, 11 August
Overcast. High 94°, low 76°.
Pressure29.94 inHg
Wind11.7 mph SW
Humidity62%
Visibility6.2 mi
Dew point74°
Wed, 1294° / 73°0.33
94 °
Fort Branch, Wednesday, 12 August
Rain. High 94°, low 73°.
Pressure29.83 inHg
Wind11.5 mph SW
Humidity61%
Visibility6.2 mi
Dew point74°
Thu, 1387° / 70°0.38
87 °
Fort Branch, Thursday, 13 August
Rain. High 87°, low 70°.
Pressure29.94 inHg
Wind13 mph NE
Humidity70%
Visibility—
Dew point71°
Fri, 1474° / 66°0.27
74 °
Fort Branch, Friday, 14 August
Rain. High 74°, low 66°.
Pressure30.06 inHg
Wind14.1 mph E
Humidity91%
Visibility—
Dew point66°
Sat, 1579° / 65°0.21
79 °
Fort Branch, Saturday, 15 August
Light rain. High 79°, low 65°.
Pressure30.18 inHg
Wind10.7 mph E
Humidity80%
Visibility—
Dew point69°
Sun, 1687° / 67°0
87 °
Fort Branch, Sunday, 16 August
Overcast. High 87°, low 67°.
Pressure30.03 inHg
Wind9.2 mph N
Humidity66%
Visibility—
Dew point72°
Mon, 1785° / 70°0
85 °
Fort Branch, Monday, 17 August
Partly cloudy. High 85°, low 70°.
Pressure30.03 inHg
Wind7.1 mph N
Humidity65%
Visibility—
Dew point69°
Tue, 1885° / 70°0.12
85 °
Fort Branch, Tuesday, 18 August
Light rain. High 85°, low 70°.
Pressure30.00 inHg
Wind7.3 mph E
Humidity68%
Visibility—
Dew point71°
Wed, 1986° / 70°0
86 °
Fort Branch, Wednesday, 19 August
Overcast. High 86°, low 70°.
Pressure29.91 inHg
Wind13.6 mph N
Humidity66%
Visibility—
Dew point71°
Thu, 2076° / 59°0
76 °
Fort Branch, Thursday, 20 August
Clear. High 76°, low 59°.
Pressure30.00 inHg
Wind12 mph N
Humidity61%
Visibility—
Dew point58°
Fri, 2177° / 58°0
77 °
Fort Branch, Friday, 21 August
Overcast. High 77°, low 58°.
Pressure30.06 inHg
Wind9.4 mph NE
Humidity52%
Visibility—
Dew point54°
Sat, 2286° / 62°0.11
86 °
Fort Branch, Saturday, 22 August
Light rain. High 86°, low 62°.
Pressure29.85 inHg
Wind13.2 mph S
Humidity63%
Visibility—
Dew point67°
Sun, 2391° / 73°0
91 °
Fort Branch, Sunday, 23 August
Light rain. High 91°, low 73°.
Pressure29.94 inHg
Wind9.1 mph W
Humidity57%
Visibility—
Dew point70°
Mon, 2481° / 73°0.01
81 °
Fort Branch, Monday, 24 August
Light rain. High 81°, low 73°.
Pressure30.03 inHg
Wind5.8 mph SW
Humidity75%
Visibility—
Dew point71°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2586° / 69°0.06
86 °
Fort Branch, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high86°
Average low69°
Average precipitation0.06 in
Chance of precipitation23%
Record high98° (2023)
Record low58° (2015)
Wed, 2686° / 69°0.07
86 °
Fort Branch, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high86°
Average low69°
Average precipitation0.07 in
Chance of precipitation20%
Record high95° (2003)
Record low55° (2025)
Thu, 2786° / 70°0.11
86 °
Fort Branch, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high86°
Average low70°
Average precipitation0.11 in
Chance of precipitation33%
Record high95° (2024)
Record low53° (2025)
Fri, 2886° / 69°0.16
86 °
Fort Branch, Friday, 28 August
Climate normal for this date — 60-year average.
Average high86°
Average low69°
Average precipitation0.16 in
Chance of precipitation33%
Record high96° (2007)
Record low56° (1986)
Sat, 2985° / 69°0.1
85 °
Fort Branch, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high85°
Average low69°
Average precipitation0.1 in
Chance of precipitation27%
Record high98° (2024)
Record low52° (1986)
Sun, 3084° / 68°0.15
84 °
Fort Branch, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high84°
Average low68°
Average precipitation0.15 in
Chance of precipitation22%
Record high95° (2024)
Record low53° (1986)
Mon, 3184° / 68°0.06
84 °
Fort Branch, Monday, 31 August
Climate normal for this date — 60-year average.
Average high84°
Average low68°
Average precipitation0.06 in
Chance of precipitation37%
Record high96° (1995)
Record low58° (2009)
Tue, 0184° / 68°0.12
84 °
Fort Branch, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high84°
Average low68°
Average precipitation0.12 in
Chance of precipitation30%
Record high97° (2011)
Record low54° (1967)
Wed, 0284° / 68°0.14
84 °
Fort Branch, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high84°
Average low68°
Average precipitation0.14 in
Chance of precipitation30%
Record high97° (2011)
Record low56° (1965)
Thu, 0383° / 68°0.13
83 °
Fort Branch, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high83°
Average low68°
Average precipitation0.13 in
Chance of precipitation32%
Record high98° (2011)
Record low55° (1974)
Fri, 0483° / 67°0.09
83 °
Fort Branch, Friday, 4 September
Climate normal for this date — 60-year average.
Average high83°
Average low67°
Average precipitation0.09 in
Chance of precipitation27%
Record high96° (2007)
Record low53° (1974)
Sat, 0583° / 67°0.11
83 °
Fort Branch, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high83°
Average low67°
Average precipitation0.11 in
Chance of precipitation27%
Record high95° (1998)
Record low53° (1974)
Sun, 0683° / 66°0.03
83 °
Fort Branch, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.03 in
Chance of precipitation18%
Record high96° (1998)
Record low55° (1988)
Mon, 0783° / 66°0.03
83 °
Fort Branch, Monday, 7 September
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.03 in
Chance of precipitation20%
Record high96° (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 Fort Branch, 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 Fort Branch, 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.