Monthly outlook for Petersburg, KY: average high 90.4°, average low 69.8°. That is 4.5° above the climate normal for August. Precipitation is expected on 4 days (about 1.7 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 23 August (105°), the coolest 15 August (61.6°).
90.4°/69.8°
Average high / low
+4.5°
Above normal
4 / 5
Wet days / normal
1.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
85.5°
82.3°
+1.8°
19 August – 28 August
98.6°
82.4°
+9°
29 August – 7 September
at normal
80.6°
—
August records over 66 years
99°17 August 1988All-time high
48.9°29 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Moores Hill (13 mi).
Mon, 1093° / 74°0
93 °
Petersburg, Monday, 10 August
Clear. High 93°, low 74°.
Pressure30.00 inHg
Wind10.2 mph SW
Humidity54%
Visibility6.2 mi
Dew point70°
Tue, 1196° / 72°0.19
96 °
Petersburg, Tuesday, 11 August
Rain. High 96°, low 72°.
Pressure29.94 inHg
Wind10 mph SW
Humidity52%
Visibility6.2 mi
Dew point68°
Wed, 1290° / 66°0.13
90 °
Petersburg, Wednesday, 12 August
Light rain. High 90°, low 66°.
Pressure29.80 inHg
Wind6.2 mph W
Humidity59%
Visibility6.2 mi
Dew point70°
Thu, 1386° / 65°0
86 °
Petersburg, Thursday, 13 August
Clear. High 86°, low 65°.
Pressure29.94 inHg
Wind8.9 mph NE
Humidity38%
Visibility—
Dew point55°
Fri, 1470° / 63°1.34
70 °
Petersburg, Friday, 14 August
Heavy rain. High 70°, low 63°.
Pressure30.12 inHg
Wind7.1 mph E
Humidity97%
Visibility—
Dew point63°
Sat, 1577° / 62°0
77 °
Petersburg, Saturday, 15 August
Overcast. High 77°, low 62°.
Pressure30.27 inHg
Wind8.3 mph E
Humidity56%
Visibility—
Dew point53°
Sun, 1683° / 62°0.06
83 °
Petersburg, Sunday, 16 August
Light rain. High 83°, low 62°.
Pressure30.09 inHg
Wind5.3 mph E
Humidity56%
Visibility—
Dew point60°
Mon, 1783° / 67°0.01
83 °
Petersburg, Monday, 17 August
Light rain. High 83°, low 67°.
Pressure30.06 inHg
Wind5.4 mph N
Humidity57%
Visibility—
Dew point63°
Tue, 1885° / 65°0
85 °
Petersburg, Tuesday, 18 August
Clear. High 85°, low 65°.
Pressure30.03 inHg
Wind4.9 mph NE
Humidity44%
Visibility—
Dew point58°
Wed, 1991° / 65°0
91 °
Petersburg, Wednesday, 19 August
Clear. High 91°, low 65°.
Pressure30.03 inHg
Wind4.2 mph S
Humidity39%
Visibility—
Dew point59°
Thu, 20100° / 72°0
100 °
Petersburg, Thursday, 20 August
Overcast. High 100°, low 72°.
Pressure29.91 inHg
Wind10.4 mph SW
Humidity54%
Visibility—
Dew point69°
Fri, 2199° / 77°0
99 °
Petersburg, Friday, 21 August
Partly cloudy. High 99°, low 77°.
Pressure29.83 inHg
Wind8.2 mph W
Humidity35%
Visibility—
Dew point64°
Sat, 22100° / 76°0
100 °
Petersburg, Saturday, 22 August
Partly cloudy. High 100°, low 76°.
Pressure29.91 inHg
Wind5.4 mph E
Humidity42%
Visibility—
Dew point67°
Sun, 23105° / 79°0
105 °
Petersburg, Sunday, 23 August
Partly cloudy. High 105°, low 79°.
Pressure29.88 inHg
Wind5.7 mph SW
Humidity32%
Visibility—
Dew point64°
Mon, 2497° / 79°0
97 °
Petersburg, Monday, 24 August
Overcast. High 97°, low 79°.
Pressure30.00 inHg
Wind10 mph N
Humidity55%
Visibility—
Dew point71°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2583° / 66°0.07
83 °
Petersburg, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.07 in
Chance of precipitation30%
Record high92° (1998)
Record low56° (1984)
Wed, 2683° / 66°0.08
83 °
Petersburg, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.08 in
Chance of precipitation35%
Record high91° (1983)
Record low53° (2025)
Thu, 2783° / 67°0.09
83 °
Petersburg, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high83°
Average low67°
Average precipitation0.09 in
Chance of precipitation35%
Record high94° (2024)
Record low52° (2025)
Fri, 2883° / 66°0.13
83 °
Petersburg, Friday, 28 August
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.13 in
Chance of precipitation32%
Record high94° (2024)
Record low52° (1986)
Sat, 2982° / 66°0.13
82 °
Petersburg, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.13 in
Chance of precipitation42%
Record high94° (2007)
Record low49° (1986)
Sun, 3081° / 65°0.12
81 °
Petersburg, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.12 in
Chance of precipitation33%
Record high96° (2024)
Record low51° (1986)
Mon, 3181° / 65°0.08
81 °
Petersburg, Monday, 31 August
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.08 in
Chance of precipitation28%
Record high91° (1995)
Record low54° (2009)
Tue, 0181° / 64°0.09
81 °
Petersburg, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.09 in
Chance of precipitation28%
Record high94° (2011)
Record low51° (1967)
Wed, 0281° / 65°0.13
81 °
Petersburg, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.13 in
Chance of precipitation33%
Record high94° (2011)
Record low52° (2017)
Thu, 0381° / 64°0.12
81 °
Petersburg, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.12 in
Chance of precipitation27%
Record high96° (2011)
Record low53° (1974)
Fri, 0480° / 64°0.07
80 °
Petersburg, Friday, 4 September
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.07 in
Chance of precipitation27%
Record high92° (2007)
Record low51° (1997)
Sat, 0580° / 63°0.11
80 °
Petersburg, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.11 in
Chance of precipitation32%
Record high94° (2007)
Record low52° (1997)
Sun, 0680° / 63°0.04
80 °
Petersburg, 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 low51° (1962)
Mon, 0780° / 63°0.03
80 °
Petersburg, Monday, 7 September
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.03 in
Chance of precipitation17%
Record high92° (2002)
Record low50° (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 Petersburg, KY 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 Petersburg, KY 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.