As of 10:14 CDT

Weather in St. Peter, IL

66°

St. Peter, Sunday, 11 October, 10:14

Clear. Feels like 66°. High 82°, low 55°.

Pressure30.00 inHg

Wind3.1 mph N

Humidity76%

Visibility6.2 mi

Dew point58°

See detailed hourly forecast

Mon, 1289° / 61°

89 °

St. Peter, Monday, 12 October

Clear. High 89°, low 61°.

Pressure29.94 inHg

Wind10.4 mph SW

Humidity49%

Visibility6.2 mi

Dew point61°

Tue, 1388° / 68°

88 °

St. Peter, Tuesday, 13 October

Clear. High 88°, low 68°.

Pressure29.94 inHg

Wind10 mph SW

Humidity52%

Visibility6.2 mi

Dew point64°

Wed, 1477° / 71°

0.07

77 °

St. Peter, Wednesday, 14 October

Light rain. High 77°, low 71°.

Pressure30.03 inHg

Wind7.3 mph SW

Humidity95%

Visibility4.7 mi

Dew point73°

Thu, 1580° / 69°

0.46

80 °

St. Peter, Thursday, 15 October

Rain. High 80°, low 69°.

Pressure30.03 inHg

Wind10.8 mph SW

Humidity74%

Visibility—

Dew point69°

Fri, 1672° / 53°

0.09

72 °

St. Peter, Friday, 16 October

Light rain. High 72°, low 53°.

Pressure30.30 inHg

Wind18.1 mph N

Humidity45%

Visibility—

Dew point41°

Sat, 1747° / 36°

47 °

St. Peter, Saturday, 17 October

Clear. High 47°, low 36°.

Pressure30.53 inHg

Wind14 mph N

Humidity23%

Visibility—

Dew point9°

Sun, 1855° / 31°

55 °

St. Peter, Sunday, 18 October

Clear. High 55°, low 31°.

Pressure30.56 inHg

Wind12.8 mph S

Humidity23%

Visibility—

Dew point13°

Mon, 1965° / 37°

65 °

St. Peter, Monday, 19 October

Clear. High 65°, low 37°.

Pressure30.42 inHg

Wind13.6 mph SW

Humidity18%

Visibility—

Dew point16°

Tue, 2067° / 43°

67 °

St. Peter, Tuesday, 20 October

Overcast. High 67°, low 43°.

Pressure30.36 inHg

Wind8.9 mph S

Humidity23%

Visibility—

Dew point25°

Wed, 2172° / 49°

72 °

St. Peter, Wednesday, 21 October

Overcast. High 72°, low 49°.

Pressure30.27 inHg

Wind9.8 mph S

Humidity27%

Visibility—

Dew point31°

Thu, 2275° / 50°

75 °

St. Peter, Thursday, 22 October

Partly cloudy. High 75°, low 50°.

Pressure30.24 inHg

Wind6.5 mph S

Humidity27%

Visibility—

Dew point33°

Fri, 2377° / 55°

77 °

St. Peter, Friday, 23 October

Mostly clear. High 77°, low 55°.

Pressure30.18 inHg

Wind7.3 mph SW

Humidity28%

Visibility—

Dew point38°

Sat, 2479° / 58°

79 °

St. Peter, Saturday, 24 October

Clear. High 79°, low 58°.

Pressure30.12 inHg

Wind6.4 mph W

Humidity42%

Visibility—

Dew point50°

Sun, 2580° / 62°

0.14

80 °

St. Peter, Sunday, 25 October

Rain. High 80°, low 62°.

Pressure29.97 inHg

Wind16.1 mph W

Humidity50%

Visibility—

Dew point56°

Mon, 2659° / 46°

59 °

St. Peter, Monday, 26 October

Overcast. High 59°, low 46°.

Pressure29.94 inHg

Wind16.7 mph NW

Humidity49%

Visibility—

Dew point34°

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.