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As of 03:13 CDT

Weather in Petersburg, MO

78°Current weather

Petersburg, Sunday, 9 August, 03:13

Overcast. Feels like 80°. High 99°, low 76°.

Pressure29.91 inHg
Wind10.1 mph S
Humidity86%
Visibility6.2 mi
Dew point73°
Mon, 1099° / 78°0Mostly clear
99 °Mostly clear

Petersburg, Monday, 10 August

Mostly clear. High 99°, low 78°.

Pressure29.88 inHg
Wind16.4 mph SW
Humidity41%
Visibility6.2 mi
Dew point67°
Tue, 11103° / 73°0.03Light rain
103 °Light rain

Petersburg, Tuesday, 11 August

Light rain. High 103°, low 73°.

Pressure29.83 inHg
Wind18.1 mph SW
Humidity38%
Visibility6.2 mi
Dew point66°
Wed, 1295° / 75°0Overcast
95 °Overcast

Petersburg, Wednesday, 12 August

Overcast. High 95°, low 75°.

Pressure29.80 inHg
Wind9.3 mph SW
Humidity41%
Visibility6.2 mi
Dew point66°
Thu, 13103° / 73°0Light rain
103 °Light rain

Petersburg, Thursday, 13 August

Light rain. High 103°, low 73°.

Pressure29.80 inHg
Wind13.8 mph E
Humidity36%
Visibility—
Dew point61°
Fri, 1490° / 71°0Light rain
90 °Light rain

Petersburg, Friday, 14 August

Light rain. High 90°, low 71°.

Pressure29.91 inHg
Wind18.3 mph NE
Humidity47%
Visibility—
Dew point65°
Sat, 1595° / 67°0.01Light rain
95 °Light rain

Petersburg, Saturday, 15 August

Light rain. High 95°, low 67°.

Pressure30.03 inHg
Wind12.5 mph E
Humidity48%
Visibility—
Dew point64°
Sun, 1696° / 72°0Partly cloudy
96 °Partly cloudy

Petersburg, Sunday, 16 August

Partly cloudy. High 96°, low 72°.

Pressure30.06 inHg
Wind11.4 mph N
Humidity48%
Visibility—
Dew point67°
Mon, 1791° / 72°0.04Light rain
91 °Light rain

Petersburg, Monday, 17 August

Light rain. High 91°, low 72°.

Pressure30.00 inHg
Wind10.6 mph NE
Humidity51%
Visibility—
Dew point68°
Tue, 18110° / 73°0Mostly clear
110 °Mostly clear

Petersburg, Tuesday, 18 August

Mostly clear. High 110°, low 73°.

Pressure29.85 inHg
Wind11.1 mph S
Humidity22%
Visibility—
Dew point54°
Wed, 19114° / 83°0Clear
114 °Clear

Petersburg, Wednesday, 19 August

Clear. High 114°, low 83°.

Pressure29.83 inHg
Wind16 mph SW
Humidity14%
Visibility—
Dew point48°
Thu, 20116° / 86°0Clear
116 °Clear

Petersburg, Thursday, 20 August

Clear. High 116°, low 86°.

Pressure29.80 inHg
Wind15.4 mph SW
Humidity13%
Visibility—
Dew point47°
Fri, 21113° / 81°0Clear
113 °Clear

Petersburg, Friday, 21 August

Clear. High 113°, low 81°.

Pressure29.83 inHg
Wind9.1 mph SW
Humidity18%
Visibility—
Dew point52°
Sat, 22113° / 82°0Mostly clear
113 °Mostly clear

Petersburg, Saturday, 22 August

Mostly clear. High 113°, low 82°.

Pressure29.80 inHg
Wind14.7 mph SW
Humidity17%
Visibility—
Dew point52°
Sun, 23109° / 75°0.06Light rain
109 °Light rain

Petersburg, Sunday, 23 August

Light rain. High 109°, low 75°.

Pressure29.83 inHg
Wind23.2 mph SW
Humidity24%
Visibility—
Dew point58°
Mon, 24105° / 71°0.06Light rain
105 °Light rain

Petersburg, Monday, 24 August

Light rain. High 105°, low 71°.

Pressure29.94 inHg
Wind10.2 mph E
Humidity26%
Visibility—
Dew point56°

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, MO 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, MO 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.