As of 08:59 EDT

Weather in Harrisburg, IN

73°Current weather

Harrisburg, Sunday, 9 August, 08:59

Partly cloudy. Feels like 74°. High 91°, low 69°.

Pressure30.09 inHg
Wind2 mph SW
Humidity98%
Visibility6.2 mi
Dew point72°

Monthly outlook for Harrisburg, IN: average high 80.3°, average low 62.6°. That is 0.3° below the climate normal for August. Precipitation is expected on 7 days (about 2.4 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 10 August (94.5°), the coolest 24 August (55.3°).

80.3°/62.6°
Average high / low
−0.3°
Below normal
7 / 5
Wet days / normal
2.4 in
Precipitation this month

Ten-day blocks vs climate normal

PeriodForecast highNormalDifference
9 August – 18 August82°81°+0.6°
19 August – 28 August77.5°81.1°-2°
29 August – 7 Septemberat normal79.4°

August records over 66 years

96.4°19 August 1983All-time high
44.8°29 August 1986All-time low

Climate normals and records are computed from the nearest reference point — Milton (7 mi).

Mon, 1095° / 72°0.4Heavy rain
95 °Heavy rain

Harrisburg, Monday, 10 August

Heavy rain. High 95°, low 72°.

Pressure30.00 inHg
Wind13.7 mph SW
Humidity73%
Visibility6.2 mi
Dew point73°
Tue, 1189° / 66°1.14Heavy rain
89 °Heavy rain

Harrisburg, Tuesday, 11 August

Heavy rain. High 89°, low 66°.

Pressure29.97 inHg
Wind10.7 mph S
Humidity86%
Visibility6.2 mi
Dew point73°
Wed, 1283° / 66°0.04Light rain
83 °Light rain

Harrisburg, Wednesday, 12 August

Light rain. High 83°, low 66°.

Pressure29.83 inHg
Wind14.1 mph W
Humidity78%
Visibility6.2 mi
Dew point73°
Thu, 1378° / 64°0.09Light rain
78 °Light rain

Harrisburg, Thursday, 13 August

Light rain. High 78°, low 64°.

Pressure29.94 inHg
Wind10 mph E
Humidity67%
Visibility
Dew point64°
Fri, 1474° / 66°0.22Rain
74 °Rain

Harrisburg, Friday, 14 August

Rain. High 74°, low 66°.

Pressure30.09 inHg
Wind9.7 mph E
Humidity86%
Visibility
Dew point65°
Sat, 1574° / 58°0Overcast
74 °Overcast

Harrisburg, Saturday, 15 August

Overcast. High 74°, low 58°.

Pressure30.24 inHg
Wind12.3 mph E
Humidity61%
Visibility
Dew point56°
Sun, 1684° / 60°0.01Light rain
84 °Light rain

Harrisburg, Sunday, 16 August

Light rain. High 84°, low 60°.

Pressure29.94 inHg
Wind11.2 mph NW
Humidity70%
Visibility
Dew point70°
Mon, 1774° / 63°0.01Light rain
74 °Light rain

Harrisburg, Monday, 17 August

Light rain. High 74°, low 63°.

Pressure30.06 inHg
Wind9.3 mph N
Humidity69%
Visibility
Dew point62°
Tue, 1878° / 60°0.01Light rain
78 °Light rain

Harrisburg, Tuesday, 18 August

Light rain. High 78°, low 60°.

Pressure29.94 inHg
Wind6.6 mph SE
Humidity62%
Visibility
Dew point61°
Wed, 1983° / 65°0.31Rain
83 °Rain

Harrisburg, Wednesday, 19 August

Rain. High 83°, low 65°.

Pressure29.77 inHg
Wind13.3 mph NW
Humidity70%
Visibility
Dew point70°
Thu, 2072° / 57°0Overcast
72 °Overcast

Harrisburg, Thursday, 20 August

Overcast. High 72°, low 57°.

Pressure29.94 inHg
Wind11.1 mph N
Humidity64%
Visibility
Dew point57°
Fri, 2178° / 57°0Light rain
78 °Light rain

Harrisburg, Friday, 21 August

Light rain. High 78°, low 57°.

Pressure29.91 inHg
Wind9.8 mph S
Humidity64%
Visibility
Dew point61°
Sat, 2284° / 64°0.17Light rain
84 °Light rain

Harrisburg, Saturday, 22 August

Light rain. High 84°, low 64°.

Pressure29.80 inHg
Wind17 mph SW
Humidity70%
Visibility
Dew point69°
Sun, 2373° / 58°0Clear
73 °Clear

Harrisburg, Sunday, 23 August

Clear. High 73°, low 58°.

Pressure30.12 inHg
Wind11.8 mph N
Humidity61%
Visibility
Dew point56°
Mon, 2475° / 55°0Clear
75 °Clear

Harrisburg, Monday, 24 August

Clear. High 75°, low 55°.

Pressure30.21 inHg
Wind6.7 mph NE
Humidity55%
Visibility
Dew point55°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2581° / 64°0.05Climate normal
81 °Climate normal

Harrisburg, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high81°
Average low64°
Average precipitation0.05 in
Chance of precipitation30%
Record high91° (1983)
Record low52° (1984)
Wed, 2682° / 64°0.08Climate normal
82 °Climate normal

Harrisburg, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high82°
Average low64°
Average precipitation0.08 in
Chance of precipitation33%
Record high90° (2012)
Record low50° (2025)
Thu, 2782° / 65°0.11Climate normal
82 °Climate normal

Harrisburg, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high82°
Average low65°
Average precipitation0.11 in
Chance of precipitation37%
Record high92° (2024)
Record low49° (2025)
Fri, 2881° / 65°0.16Climate normal
81 °Climate normal

Harrisburg, Friday, 28 August

Climate normal for this date — 60-year average.

Average high81°
Average low65°
Average precipitation0.16 in
Chance of precipitation37%
Record high91° (2024)
Record low50° (1986)
Sat, 2980° / 64°0.1Climate normal
80 °Climate normal

Harrisburg, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high80°
Average low64°
Average precipitation0.1 in
Chance of precipitation37%
Record high91° (2007)
Record low45° (1986)
Sun, 3080° / 64°0.13Climate normal
80 °Climate normal

Harrisburg, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high80°
Average low64°
Average precipitation0.13 in
Chance of precipitation28%
Record high93° (2024)
Record low49° (1986)
Mon, 3180° / 63°0.06Climate normal
80 °Climate normal

Harrisburg, Monday, 31 August

Climate normal for this date — 60-year average.

Average high80°
Average low63°
Average precipitation0.06 in
Chance of precipitation28%
Record high90° (2012)
Record low50° (2009)
Tue, 0180° / 63°0.1Climate normal
80 °Climate normal

Harrisburg, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high80°
Average low63°
Average precipitation0.1 in
Chance of precipitation23%
Record high96° (2011)
Record low49° (1967)
Wed, 0280° / 63°0.11Climate normal
80 °Climate normal

Harrisburg, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high80°
Average low63°
Average precipitation0.11 in
Chance of precipitation30%
Record high97° (2011)
Record low49° (1967)
Thu, 0380° / 63°0.09Climate normal
80 °Climate normal

Harrisburg, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high80°
Average low63°
Average precipitation0.09 in
Chance of precipitation28%
Record high96° (2011)
Record low51° (1974)
Fri, 0479° / 62°0.06Climate normal
79 °Climate normal

Harrisburg, Friday, 4 September

Climate normal for this date — 60-year average.

Average high79°
Average low62°
Average precipitation0.06 in
Chance of precipitation23%
Record high92° (1999)
Record low46° (1974)
Sat, 0579° / 61°0.07Climate normal
79 °Climate normal

Harrisburg, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high79°
Average low61°
Average precipitation0.07 in
Chance of precipitation28%
Record high92° (2007)
Record low48° (1997)
Sun, 0679° / 61°0.04Climate normal
79 °Climate normal

Harrisburg, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high79°
Average low61°
Average precipitation0.04 in
Chance of precipitation20%
Record high92° (1998)
Record low47° (1962)
Mon, 0778° / 61°0.06Climate normal
78 °Climate normal

Harrisburg, Monday, 7 September

Climate normal for this date — 60-year average.

Average high78°
Average low61°
Average precipitation0.06 in
Chance of precipitation28%
Record high91° (2002)
Record low46° (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 Harrisburg, 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 Harrisburg, 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.