Monthly outlook for Coal Run, OH: average high 86.4°, average low 63.6°. That is 2.4° above the climate normal for August. Precipitation is expected on 4 days (about 4.0 inches), against a normal of 6 days and 2.0 inches. The warmest day looks like 23 August (98.6°), the coolest 16 August (52.8°).
86.4°/63.6°
Average high / low
+2.4°
Above normal
4 / 6
Wet days / normal
4.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
82.3°
82.2°
+0.1°
19 August – 28 August
93.2°
82.1°
+6.1°
29 August – 7 September
at normal
80.7°
—
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 (12 mi).
Mon, 1090° / 68°0.48
90 °
Coal Run, Monday, 10 August
Heavy rain. High 90°, low 68°.
Pressure30.03 inHg
Wind8.5 mph SW
Humidity79%
Visibility6.2 mi
Dew point70°
Tue, 1189° / 65°1.56
89 °
Coal Run, Tuesday, 11 August
Heavy rain. High 89°, low 65°.
Pressure30.00 inHg
Wind5.9 mph SW
Humidity80%
Visibility6.2 mi
Dew point70°
Wed, 1289° / 63°1.89
89 °
Coal Run, Wednesday, 12 August
Heavy rain. High 89°, low 63°.
Pressure29.83 inHg
Wind7 mph SW
Humidity90%
Visibility6.2 mi
Dew point73°
Thu, 1381° / 62°0.02
81 °
Coal Run, Thursday, 13 August
Light rain. High 81°, low 62°.
Pressure29.94 inHg
Wind9.4 mph NW
Humidity48%
Visibility—
Dew point57°
Fri, 1477° / 59°0
77 °
Coal Run, Friday, 14 August
Light rain. High 77°, low 59°.
Pressure30.09 inHg
Wind5.4 mph N
Humidity50%
Visibility—
Dew point54°
Sat, 1577° / 53°0
77 °
Coal Run, Saturday, 15 August
Overcast. High 77°, low 53°.
Pressure30.24 inHg
Wind5.5 mph NE
Humidity40%
Visibility—
Dew point47°
Sun, 1670° / 53°0
70 °
Coal Run, Sunday, 16 August
Overcast. High 70°, low 53°.
Pressure30.18 inHg
Wind5 mph E
Humidity76%
Visibility—
Dew point54°
Mon, 1780° / 56°0
80 °
Coal Run, Monday, 17 August
Overcast. High 80°, low 56°.
Pressure30.03 inHg
Wind5.7 mph NW
Humidity45%
Visibility—
Dew point53°
Tue, 1884° / 59°0
84 °
Coal Run, Tuesday, 18 August
Clear. High 84°, low 59°.
Pressure30.03 inHg
Wind3.8 mph NE
Humidity44%
Visibility—
Dew point57°
Wed, 1986° / 61°0
86 °
Coal Run, Wednesday, 19 August
Partly cloudy. High 86°, low 61°.
Pressure30.06 inHg
Wind3.2 mph E
Humidity41%
Visibility—
Dew point57°
Thu, 2090° / 65°0
90 °
Coal Run, Thursday, 20 August
Overcast. High 90°, low 65°.
Pressure29.94 inHg
Wind7.9 mph SW
Humidity41%
Visibility—
Dew point60°
Fri, 2196° / 74°0
96 °
Coal Run, Friday, 21 August
Overcast. High 96°, low 74°.
Pressure29.83 inHg
Wind8.3 mph NW
Humidity43%
Visibility—
Dew point67°
Sat, 2294° / 68°0
94 °
Coal Run, Saturday, 22 August
Overcast. High 94°, low 68°.
Pressure29.94 inHg
Wind5.3 mph NE
Humidity35%
Visibility—
Dew point58°
Sun, 2399° / 69°0
99 °
Coal Run, Sunday, 23 August
Clear. High 99°, low 69°.
Pressure29.91 inHg
Wind5.2 mph SW
Humidity40%
Visibility—
Dew point65°
Mon, 2494° / 73°0.04
94 °
Coal Run, Monday, 24 August
Light rain. High 94°, low 73°.
Pressure29.97 inHg
Wind5.9 mph NW
Humidity49%
Visibility—
Dew point70°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2582° / 65°0.07
82 °
Coal Run, 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°0.09
83 °
Coal Run, 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°0.13
83 °
Coal Run, 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°0.13
83 °
Coal Run, 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°0.1
82 °
Coal Run, 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°0.1
82 °
Coal Run, 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°0.11
81 °
Coal Run, 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°0.09
81 °
Coal Run, 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°0.11
81 °
Coal Run, 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°0.09
81 °
Coal Run, 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°0.07
80 °
Coal Run, 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°0.11
80 °
Coal Run, 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°0.11
80 °
Coal Run, 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°0.08
80 °
Coal Run, 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 Coal Run, 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 Coal Run, 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.