As of 06:23 CDT

Weather in Petersville, IA

67°

Petersville, Sunday, 9 August, 06:23

Overcast. Feels like 67°. High 87°, low 65°.

Pressure29.94 inHg

Wind5.3 mph S

Humidity92%

Visibility6.2 mi

Dew point64°

See detailed hourly forecast

Monthly outlook for Petersville, IA: average high 83.7°, average low 67°. That is 1.9° above the climate normal for August. Precipitation is expected on 6 days (about 1.6 inches), against a normal of 5 days and 1.9 inches. The warmest day looks like 22 August (93.9°), the coolest 14 August (60.5°).

83.7°/67°

Average high / low

+1.9°

Above normal

6 / 5

Wet days / normal

1.6 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
9 August – 18 August	80.6°	80.4°	+0.1°
19 August – 28 August	89°	80.4°	+4.8°
29 August – 7 September	at normal	78.6°	—

August records over 66 years

102.2°16 August 1988All-time high

45.1°29 August 1986All-time low

Climate normals and records are computed from the nearest reference point — Goose Lake (8 mi).

Mon, 1087° / 71°

0.09

87 °

Petersville, Monday, 10 August

Rain. High 87°, low 71°.

Pressure29.91 inHg

Wind5 mph E

Humidity85%

Visibility6.2 mi

Dew point74°

Tue, 1187° / 69°

0.01

87 °

Petersville, Tuesday, 11 August

Light rain. High 87°, low 69°.

Pressure29.77 inHg

Wind7.8 mph S

Humidity80%

Visibility6.2 mi

Dew point69°

Wed, 1283° / 68°

83 °

Petersville, Wednesday, 12 August

Overcast. High 83°, low 68°.

Pressure29.85 inHg

Wind7.4 mph N

Humidity76%

Visibility6.2 mi

Dew point71°

Thu, 1375° / 61°

0.57

75 °

Petersville, Thursday, 13 August

Rain. High 75°, low 61°.

Pressure30.03 inHg

Wind8.9 mph E

Humidity67%

Visibility—

Dew point61°

Fri, 1473° / 61°

0.02

73 °

Petersville, Friday, 14 August

Light rain. High 73°, low 61°.

Pressure30.15 inHg

Wind14.4 mph E

Humidity61%

Visibility—

Dew point57°

Sat, 1574° / 61°

0.04

74 °

Petersville, Saturday, 15 August

Light rain. High 74°, low 61°.

Pressure30.21 inHg

Wind12.5 mph E

Humidity65%

Visibility—

Dew point59°

Sun, 1678° / 65°

0.04

78 °

Petersville, Sunday, 16 August

Light rain. High 78°, low 65°.

Pressure30.09 inHg

Wind6.7 mph NW

Humidity82%

Visibility—

Dew point68°

Mon, 1781° / 64°

81 °

Petersville, Monday, 17 August

Overcast. High 81°, low 64°.

Pressure30.09 inHg

Wind5.7 mph NW

Humidity66%

Visibility—

Dew point65°

Tue, 1882° / 62°

82 °

Petersville, Tuesday, 18 August

Overcast. High 82°, low 62°.

Pressure29.97 inHg

Wind11.4 mph S

Humidity76%

Visibility—

Dew point68°

Wed, 1990° / 70°

90 °

Petersville, Wednesday, 19 August

Overcast. High 90°, low 70°.

Pressure29.83 inHg

Wind13.1 mph SE

Humidity65%

Visibility—

Dew point71°

Thu, 2092° / 75°

92 °

Petersville, Thursday, 20 August

Overcast. High 92°, low 75°.

Pressure29.77 inHg

Wind7.1 mph N

Humidity53%

Visibility—

Dew point69°

Fri, 2187° / 71°

87 °

Petersville, Friday, 21 August

Partly cloudy. High 87°, low 71°.

Pressure29.94 inHg

Wind11.5 mph NE

Humidity56%

Visibility—

Dew point66°

Sat, 2294° / 67°

94 °

Petersville, Saturday, 22 August

Clear. High 94°, low 67°.

Pressure29.83 inHg

Wind12.7 mph SE

Humidity61%

Visibility—

Dew point71°

Sun, 2388° / 75°

88 °

Petersville, Sunday, 23 August

Light rain. High 88°, low 75°.

Pressure29.80 inHg

Wind14 mph NE

Humidity55%

Visibility—

Dew point68°

Mon, 2483° / 66°

0.67

83 °

Petersville, Monday, 24 August

Rain. High 83°, low 66°.

Pressure30.03 inHg

Wind11.3 mph NE

Humidity73%

Visibility—

Dew point70°

From day 17 onward the outlook is built from 60-year climate statistics

Tue, 2581° / 64°

0.13

81 °

Petersville, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high81°

Average low64°

Average precipitation0.13 in

Chance of precipitation30%

Record high93° (2003)

Record low52° (2025)

Wed, 2681° / 64°

0.17

81 °

Petersville, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high81°

Average low64°

Average precipitation0.17 in

Chance of precipitation30%

Record high94° (2003)

Record low50° (1964)

Thu, 2780° / 65°

0.11

80 °

Petersville, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high80°

Average low65°

Average precipitation0.11 in

Chance of precipitation27%

Record high95° (2024)

Record low52° (1968)

Fri, 2880° / 64°

0.19

80 °

Petersville, Friday, 28 August

Climate normal for this date — 60-year average.

Average high80°

Average low64°

Average precipitation0.19 in

Chance of precipitation37%

Record high93° (1984)

Record low46° (1986)

Sat, 2980° / 64°

0.12

80 °

Petersville, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high80°

Average low64°

Average precipitation0.12 in

Chance of precipitation27%

Record high93° (1984)

Record low45° (1986)

Sun, 3079° / 63°

0.07

79 °

Petersville, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high79°

Average low63°

Average precipitation0.07 in

Chance of precipitation25%

Record high94° (2013)

Record low53° (2009)

Mon, 3179° / 62°

0.07

79 °

Petersville, Monday, 31 August

Climate normal for this date — 60-year average.

Average high79°

Average low62°

Average precipitation0.07 in

Chance of precipitation23%

Record high93° (2000)

Record low47° (2009)

Tue, 0179° / 62°

0.12

79 °

Petersville, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high79°

Average low62°

Average precipitation0.12 in

Chance of precipitation27%

Record high94° (1984)

Record low47° (1967)

Wed, 0279° / 62°

0.07

79 °

Petersville, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high79°

Average low62°

Average precipitation0.07 in

Chance of precipitation27%

Record high92° (1960)

Record low47° (1967)

Thu, 0378° / 62°

0.13

78 °

Petersville, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high78°

Average low62°

Average precipitation0.13 in

Chance of precipitation32%

Record high93° (2023)

Record low48° (1974)

Fri, 0478° / 61°

0.09

78 °

Petersville, Friday, 4 September

Climate normal for this date — 60-year average.

Average high78°

Average low61°

Average precipitation0.09 in

Chance of precipitation30%

Record high92° (2023)

Record low46° (2025)

Sat, 0578° / 60°

0.09

78 °

Petersville, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high78°

Average low60°

Average precipitation0.09 in

Chance of precipitation18%

Record high91° (2023)

Record low48° (1974)

Sun, 0678° / 60°

0.08

78 °

Petersville, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high78°

Average low60°

Average precipitation0.08 in

Chance of precipitation30%

Record high92° (1960)

Record low45° (1962)

Mon, 0778° / 60°

0.11

78 °

Petersville, Monday, 7 September

Climate normal for this date — 60-year average.

Average high78°

Average low60°

Average precipitation0.11 in

Chance of precipitation27%

Record high92° (1960)

Record low45° (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 Petersville, IA 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 Petersville, IA 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.