Monthly outlook for Petersburg, PA: average high 85.7°, average low 61.5°. That is 4.1° above the climate normal for August. Precipitation is expected on 5 days (about 1.9 inches), against a normal of 6 days and 1.7 inches. The warmest day looks like 23 August (96.9°), the coolest 16 August (50.1°).
85.7°/61.5°
Average high / low
+4.1°
Above normal
5 / 6
Wet days / normal
1.9 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
81.4°
79.1°
+1.3°
19 August – 28 August
93°
77.8°
+8.5°
29 August – 7 September
at normal
76.1°
—
August records over 66 years
94.6°12 August 2021All-time high
41.2°29 August 1982All-time low
Climate normals and records are computed from the nearest reference point — Pine Grove Mills (14 mi).
Mon, 1085° / 67°0.13
85 °
Petersburg, Monday, 10 August
Rain. High 85°, low 67°.
Pressure30.00 inHg
Wind3.2 mph SW
Humidity76%
Visibility6.2 mi
Dew point68°
Tue, 1188° / 62°1.45
88 °
Petersburg, Tuesday, 11 August
Heavy rain. High 88°, low 62°.
Pressure29.94 inHg
Wind8.6 mph NW
Humidity56%
Visibility6.2 mi
Dew point63°
Wed, 1282° / 66°0.02
82 °
Petersburg, Wednesday, 12 August
Light rain. High 82°, low 66°.
Pressure29.80 inHg
Wind5.4 mph W
Humidity84%
Visibility6.2 mi
Dew point67°
Thu, 1380° / 60°0.06
80 °
Petersburg, Thursday, 13 August
Light rain. High 80°, low 60°.
Pressure29.85 inHg
Wind13 mph W
Humidity35%
Visibility—
Dew point48°
Fri, 1476° / 53°0
76 °
Petersburg, Friday, 14 August
Overcast. High 76°, low 53°.
Pressure30.06 inHg
Wind9 mph NW
Humidity35%
Visibility—
Dew point43°
Sat, 1576° / 51°0
76 °
Petersburg, Saturday, 15 August
Mostly clear. High 76°, low 51°.
Pressure30.18 inHg
Wind8.6 mph NW
Humidity32%
Visibility—
Dew point41°
Sun, 1676° / 50°0
76 °
Petersburg, Sunday, 16 August
Overcast. High 76°, low 50°.
Pressure30.15 inHg
Wind2.3 mph S
Humidity35%
Visibility—
Dew point44°
Mon, 1782° / 54°0
82 °
Petersburg, Monday, 17 August
Partly cloudy. High 82°, low 54°.
Pressure30.00 inHg
Wind2.8 mph NW
Humidity42%
Visibility—
Dew point54°
Tue, 1884° / 56°0
84 °
Petersburg, Tuesday, 18 August
Mostly clear. High 84°, low 56°.
Pressure30.03 inHg
Wind2.6 mph W
Humidity40%
Visibility—
Dew point55°
Wed, 1986° / 58°0
86 °
Petersburg, Wednesday, 19 August
Mostly clear. High 86°, low 58°.
Pressure30.06 inHg
Wind2 mph N
Humidity41%
Visibility—
Dew point56°
Thu, 2091° / 62°0
91 °
Petersburg, Thursday, 20 August
Partly cloudy. High 91°, low 62°.
Pressure29.97 inHg
Wind6.3 mph S
Humidity38%
Visibility—
Dew point57°
Fri, 2195° / 66°0.1
95 °
Petersburg, Friday, 21 August
Light rain. High 95°, low 66°.
Pressure29.80 inHg
Wind7.1 mph W
Humidity46%
Visibility—
Dew point68°
Sat, 2293° / 70°0
93 °
Petersburg, Saturday, 22 August
Clear. High 93°, low 70°.
Pressure29.94 inHg
Wind4.1 mph N
Humidity30%
Visibility—
Dew point53°
Sun, 2397° / 65°0
97 °
Petersburg, Sunday, 23 August
Clear. High 97°, low 65°.
Pressure29.91 inHg
Wind5.5 mph W
Humidity33%
Visibility—
Dew point60°
Mon, 2496° / 73°0.19
96 °
Petersburg, Monday, 24 August
Rain. High 96°, low 73°.
Pressure29.94 inHg
Wind8.7 mph NE
Humidity44%
Visibility—
Dew point68°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2578° / 59°0.04
78 °
Petersburg, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high78°
Average low59°
Average precipitation0.04 in
Chance of precipitation22%
Record high88° (2020)
Record low46° (1987)
Wed, 2679° / 60°0.05
79 °
Petersburg, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high79°
Average low60°
Average precipitation0.05 in
Chance of precipitation23%
Record high91° (2021)
Record low49° (1963)
Thu, 2779° / 61°0.1
79 °
Petersburg, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high79°
Average low61°
Average precipitation0.1 in
Chance of precipitation43%
Record high91° (1993)
Record low48° (2025)
Fri, 2879° / 61°0.18
79 °
Petersburg, Friday, 28 August
Climate normal for this date — 60-year average.
Average high79°
Average low61°
Average precipitation0.18 in
Chance of precipitation45%
Record high90° (2016)
Record low45° (1968)
Sat, 2978° / 61°0.12
78 °
Petersburg, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high78°
Average low61°
Average precipitation0.12 in
Chance of precipitation33%
Record high89° (1991)
Record low41° (1982)
Sun, 3077° / 59°0.09
77 °
Petersburg, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high77°
Average low59°
Average precipitation0.09 in
Chance of precipitation37%
Record high90° (1991)
Record low45° (1965)
Mon, 3177° / 59°0.13
77 °
Petersburg, Monday, 31 August
Climate normal for this date — 60-year average.
Average high77°
Average low59°
Average precipitation0.13 in
Chance of precipitation30%
Record high91° (2010)
Record low44° (1976)
Tue, 0175° / 58°0.13
75 °
Petersburg, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high75°
Average low58°
Average precipitation0.13 in
Chance of precipitation23%
Record high92° (2010)
Record low44° (1967)
Wed, 0276° / 58°0.11
76 °
Petersburg, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high76°
Average low58°
Average precipitation0.11 in
Chance of precipitation35%
Record high93° (2010)
Record low45° (1970)
Thu, 0376° / 58°0.11
76 °
Petersburg, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high76°
Average low58°
Average precipitation0.11 in
Chance of precipitation27%
Record high91° (2010)
Record low43° (1967)
Fri, 0476° / 59°0.1
76 °
Petersburg, Friday, 4 September
Climate normal for this date — 60-year average.
Average high76°
Average low59°
Average precipitation0.1 in
Chance of precipitation32%
Record high89° (2023)
Record low46° (1997)
Sat, 0575° / 58°0.09
75 °
Petersburg, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high75°
Average low58°
Average precipitation0.09 in
Chance of precipitation25%
Record high88° (2023)
Record low44° (1974)
Sun, 0675° / 57°0.17
75 °
Petersburg, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high75°
Average low57°
Average precipitation0.17 in
Chance of precipitation32%
Record high89° (2023)
Record low43° (1984)
Mon, 0775° / 57°0.15
75 °
Petersburg, Monday, 7 September
Climate normal for this date — 60-year average.
Average high75°
Average low57°
Average precipitation0.15 in
Chance of precipitation23%
Record high90° (2016)
Record low42° (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 Petersburg, PA 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, PA 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.