As of 03:05 CDT

Weather in St. Peter, IL

46°

St. Peter, Saturday, 17 October, 03:05

Clear. Feels like 41°. High 57°, low 43°.

Pressure30.42 inHg

Wind10 mph N

Humidity82%

Visibility6.2 mi

Dew point40°

See detailed hourly forecast

Sun, 1863° / 40°

63 °

St. Peter, Sunday, 18 October

Clear. High 63°, low 40°.

Pressure30.50 inHg

Wind6.8 mph S

Humidity43%

Visibility6.2 mi

Dew point37°

Mon, 1968° / 42°

68 °

St. Peter, Monday, 19 October

Clear. High 68°, low 42°.

Pressure30.42 inHg

Wind2.3 mph S

Humidity44%

Visibility6.2 mi

Dew point42°

Tue, 2069° / 44°

69 °

St. Peter, Tuesday, 20 October

Clear. High 69°, low 44°.

Pressure30.36 inHg

Wind1.4 mph E

Humidity47%

Visibility6.2 mi

Dew point45°

Wed, 2171° / 46°

71 °

St. Peter, Wednesday, 21 October

Partly cloudy. High 71°, low 46°.

Pressure30.27 inHg

Wind3.8 mph E

Humidity41%

Visibility—

Dew point42°

Thu, 2275° / 50°

75 °

St. Peter, Thursday, 22 October

Partly cloudy. High 75°, low 50°.

Pressure30.18 inHg

Wind5 mph E

Humidity34%

Visibility—

Dew point40°

Fri, 2377° / 54°

77 °

St. Peter, Friday, 23 October

Partly cloudy. High 77°, low 54°.

Pressure30.21 inHg

Wind7.8 mph SE

Humidity25%

Visibility—

Dew point35°

Sat, 2478° / 54°

78 °

St. Peter, Saturday, 24 October

Overcast. High 78°, low 54°.

Pressure30.21 inHg

Wind7.4 mph SE

Humidity21%

Visibility—

Dew point30°

Sun, 2573° / 57°

73 °

St. Peter, Sunday, 25 October

Overcast. High 73°, low 57°.

Pressure30.24 inHg

Wind10.8 mph NE

Humidity39%

Visibility—

Dew point44°

Mon, 2672° / 52°

72 °

St. Peter, Monday, 26 October

Overcast. High 72°, low 52°.

Pressure30.27 inHg

Wind10.4 mph NE

Humidity40%

Visibility—

Dew point42°

Tue, 2779° / 58°

79 °

St. Peter, Tuesday, 27 October

Overcast. High 79°, low 58°.

Pressure30.15 inHg

Wind9.9 mph W

Humidity30%

Visibility—

Dew point42°

Wed, 2863° / 52°

0.16

63 °

St. Peter, Wednesday, 28 October

Light rain. High 63°, low 52°.

Pressure30.09 inHg

Wind8.8 mph NE

Humidity89%

Visibility—

Dew point56°

Thu, 2960° / 47°

0.58

60 °

St. Peter, Thursday, 29 October

Rain. High 60°, low 47°.

Pressure29.94 inHg

Wind15.3 mph SE

Humidity91%

Visibility—

Dew point47°

Fri, 3073° / 53°

0.06

73 °

St. Peter, Friday, 30 October

Light rain. High 73°, low 53°.

Pressure29.62 inHg

Wind19.3 mph W

Humidity50%

Visibility—

Dew point53°

Sat, 3158° / 47°

58 °

St. Peter, Saturday, 31 October

Partly cloudy. High 58°, low 47°.

Pressure30.12 inHg

Wind17 mph NW

Humidity44%

Visibility—

Dew point35°

Sun, 0161° / 42°

61 °

St. Peter, Sunday, 1 November

Clear. High 61°, low 42°.

Pressure30.15 inHg

Wind7.1 mph NW

Humidity44%

Visibility—

Dew point37°

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 St. Peter, IL 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 St. Peter, IL 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.