As of 12:42 EDT

Weather in Harriettsville, OH

83°Current weather

Harriettsville, Sunday, 9 August, 12:42

Partly cloudy. Feels like 87°. High 86°, low 68°.

Pressure30.09 inHg
Wind5.1 mph W
Humidity67%
Visibility6.2 mi
Dew point70°

Monthly outlook for Harriettsville, OH: average high 81°, average low 61.1°. That is 0.6° below the climate normal for August. Precipitation is expected on 8 days (about 3.3 inches), against a normal of 6 days and 2.0 inches. The warmest day looks like 10 August (86.3°), the coolest 21 August (53°).

81°/61.1°
Average high / low
−0.6°
Below normal
8 / 6
Wet days / normal
3.3 in
Precipitation this month

Ten-day blocks vs climate normal

PeriodForecast highNormalDifference
9 August – 18 August81.7°82.2°-0.3°
19 August – 28 August79.7°82.1°-1.3°
29 August – 7 Septemberat normal80.7°

August records over 66 years

101.1°17 August 1988All-time high
48.7°29 August 1986All-time low

Climate normals and records are computed from the nearest reference point — Marietta (15 mi).

Mon, 1086° / 69°0.54Heavy rain
86 °Heavy rain

Harriettsville, Monday, 10 August

Heavy rain. High 86°, low 69°.

Pressure30.03 inHg
Wind6.5 mph S
Humidity73%
Visibility6.2 mi
Dew point68°
Tue, 1185° / 67°0.61Heavy rain
85 °Heavy rain

Harriettsville, Tuesday, 11 August

Heavy rain. High 85°, low 67°.

Pressure30.00 inHg
Wind7.5 mph W
Humidity65%
Visibility6.2 mi
Dew point68°
Wed, 1283° / 66°1.32Heavy rain
83 °Heavy rain

Harriettsville, Wednesday, 12 August

Heavy rain. High 83°, low 66°.

Pressure29.83 inHg
Wind11.5 mph SW
Humidity81%
Visibility6.2 mi
Dew point70°
Thu, 1385° / 67°0Partly cloudy
85 °Partly cloudy

Harriettsville, Thursday, 13 August

Partly cloudy. High 85°, low 67°.

Pressure29.97 inHg
Wind3.2 mph NE
Humidity48%
Visibility6.2 mi
Dew point59°
Fri, 1475° / 60°0.28Rain
75 °Rain

Harriettsville, Friday, 14 August

Rain. High 75°, low 60°.

Pressure30.06 inHg
Wind5.7 mph NE
Humidity90%
Visibility
Dew point61°
Sat, 1578° / 54°0Overcast
78 °Overcast

Harriettsville, Saturday, 15 August

Overcast. High 78°, low 54°.

Pressure30.24 inHg
Wind6.6 mph NE
Humidity38%
Visibility
Dew point47°
Sun, 1680° / 56°0.08Light rain
80 °Light rain

Harriettsville, Sunday, 16 August

Light rain. High 80°, low 56°.

Pressure30.06 inHg
Wind4.6 mph E
Humidity68%
Visibility
Dew point60°
Mon, 1778° / 63°0.01Light rain
78 °Light rain

Harriettsville, Monday, 17 August

Light rain. High 78°, low 63°.

Pressure30.00 inHg
Wind6.8 mph NW
Humidity58%
Visibility
Dew point60°
Tue, 1883° / 59°0Partly cloudy
83 °Partly cloudy

Harriettsville, Tuesday, 18 August

Partly cloudy. High 83°, low 59°.

Pressure29.94 inHg
Wind4.1 mph NE
Humidity42%
Visibility
Dew point55°
Wed, 1982° / 63°0.16Light rain
82 °Light rain

Harriettsville, Wednesday, 19 August

Light rain. High 82°, low 63°.

Pressure29.74 inHg
Wind8.9 mph NW
Humidity75%
Visibility
Dew point69°
Thu, 2077° / 58°0.01Light rain
77 °Light rain

Harriettsville, Thursday, 20 August

Light rain. High 77°, low 58°.

Pressure29.88 inHg
Wind6.4 mph W
Humidity71%
Visibility
Dew point60°
Fri, 2179° / 53°0Mostly clear
79 °Mostly clear

Harriettsville, Friday, 21 August

Mostly clear. High 79°, low 53°.

Pressure29.91 inHg
Wind4 mph SE
Humidity40%
Visibility
Dew point49°
Sat, 2284° / 59°0.2Rain
84 °Rain

Harriettsville, Saturday, 22 August

Rain. High 84°, low 59°.

Pressure29.83 inHg
Wind10.4 mph SW
Humidity47%
Visibility
Dew point59°
Sun, 2378° / 59°0.06Light rain
78 °Light rain

Harriettsville, Sunday, 23 August

Light rain. High 78°, low 59°.

Pressure30.03 inHg
Wind8.7 mph NW
Humidity48%
Visibility
Dew point55°
Mon, 2477° / 55°0Clear
77 °Clear

Harriettsville, Monday, 24 August

Clear. High 77°, low 55°.

Pressure30.21 inHg
Wind6.8 mph NE
Humidity39%
Visibility
Dew point48°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2582° / 65°0.07Climate normal
82 °Climate normal

Harriettsville, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high82°
Average low65°
Average precipitation0.07 in
Chance of precipitation27%
Record high93° (2024)
Record low55° (1977)
Wed, 2683° / 65°0.09Climate normal
83 °Climate normal

Harriettsville, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high83°
Average low65°
Average precipitation0.09 in
Chance of precipitation30%
Record high94° (2024)
Record low55° (2025)
Thu, 2783° / 66°0.13Climate normal
83 °Climate normal

Harriettsville, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high83°
Average low66°
Average precipitation0.13 in
Chance of precipitation35%
Record high96° (2024)
Record low52° (2025)
Fri, 2883° / 66°0.13Climate normal
83 °Climate normal

Harriettsville, Friday, 28 August

Climate normal for this date — 60-year average.

Average high83°
Average low66°
Average precipitation0.13 in
Chance of precipitation28%
Record high97° (2024)
Record low52° (2025)
Sat, 2982° / 65°0.1Climate normal
82 °Climate normal

Harriettsville, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high82°
Average low65°
Average precipitation0.1 in
Chance of precipitation33%
Record high93° (2024)
Record low49° (1986)
Sun, 3082° / 65°0.1Climate normal
82 °Climate normal

Harriettsville, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high82°
Average low65°
Average precipitation0.1 in
Chance of precipitation32%
Record high96° (2024)
Record low49° (1986)
Mon, 3181° / 64°0.11Climate normal
81 °Climate normal

Harriettsville, Monday, 31 August

Climate normal for this date — 60-year average.

Average high81°
Average low64°
Average precipitation0.11 in
Chance of precipitation30%
Record high94° (1993)
Record low52° (1976)
Tue, 0181° / 64°0.09Climate normal
81 °Climate normal

Harriettsville, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high81°
Average low64°
Average precipitation0.09 in
Chance of precipitation33%
Record high93° (2010)
Record low51° (1967)
Wed, 0281° / 64°0.11Climate normal
81 °Climate normal

Harriettsville, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high81°
Average low64°
Average precipitation0.11 in
Chance of precipitation37%
Record high95° (2010)
Record low51° (1967)
Thu, 0381° / 64°0.09Climate normal
81 °Climate normal

Harriettsville, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high81°
Average low64°
Average precipitation0.09 in
Chance of precipitation32%
Record high94° (2011)
Record low51° (1967)
Fri, 0480° / 64°0.07Climate normal
80 °Climate normal

Harriettsville, Friday, 4 September

Climate normal for this date — 60-year average.

Average high80°
Average low64°
Average precipitation0.07 in
Chance of precipitation23%
Record high91° (2018)
Record low51° (1997)
Sat, 0580° / 63°0.11Climate normal
80 °Climate normal

Harriettsville, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high80°
Average low63°
Average precipitation0.11 in
Chance of precipitation32%
Record high93° (2007)
Record low51° (1997)
Sun, 0680° / 62°0.11Climate normal
80 °Climate normal

Harriettsville, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high80°
Average low62°
Average precipitation0.11 in
Chance of precipitation28%
Record high95° (2007)
Record low50° (1984)
Mon, 0780° / 62°0.08Climate normal
80 °Climate normal

Harriettsville, Monday, 7 September

Climate normal for this date — 60-year average.

Average high80°
Average low62°
Average precipitation0.08 in
Chance of precipitation22%
Record high92° (2010)
Record low49° (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 Harriettsville, OH 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 Harriettsville, OH 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.