As of 02:47 CDT

Weather in St. Johns, IL

59°

St. Johns, Friday, 16 October, 02:47

Light rain. Feels like 59°. High 63°, low 52°.

Pressure30.03 inHg

Wind16.2 mph NW

Humidity83%

Visibility6.2 mi

Dew point54°

See detailed hourly forecast

Sat, 1758° / 45°

58 °

St. Johns, Saturday, 17 October

Clear. High 58°, low 45°.

Pressure30.56 inHg

Wind6.4 mph NE

Humidity52%

Visibility6.2 mi

Dew point38°

Sun, 1863° / 42°

63 °

St. Johns, Sunday, 18 October

Clear. High 63°, low 42°.

Pressure30.50 inHg

Wind6.8 mph SE

Humidity46%

Visibility6.2 mi

Dew point38°

Mon, 1968° / 44°

68 °

St. Johns, Monday, 19 October

Clear. High 68°, low 44°.

Pressure30.39 inHg

Wind4.7 mph S

Humidity46%

Visibility6.2 mi

Dew point43°

Tue, 2070° / 46°

70 °

St. Johns, Tuesday, 20 October

Clear. High 70°, low 46°.

Pressure30.33 inHg

Wind5 mph E

Humidity38%

Visibility—

Dew point40°

Wed, 2173° / 47°

73 °

St. Johns, Wednesday, 21 October

Mostly clear. High 73°, low 47°.

Pressure30.27 inHg

Wind5.1 mph E

Humidity37%

Visibility—

Dew point40°

Thu, 2277° / 53°

77 °

St. Johns, Thursday, 22 October

Clear. High 77°, low 53°.

Pressure30.24 inHg

Wind5.7 mph E

Humidity24%

Visibility—

Dew point33°

Fri, 2379° / 55°

79 °

St. Johns, Friday, 23 October

Overcast. High 79°, low 55°.

Pressure30.15 inHg

Wind8.3 mph E

Humidity24%

Visibility—

Dew point35°

Sat, 2478° / 57°

78 °

St. Johns, Saturday, 24 October

Overcast. High 78°, low 57°.

Pressure30.18 inHg

Wind6.9 mph SE

Humidity31%

Visibility—

Dew point41°

Sun, 2577° / 55°

77 °

St. Johns, Sunday, 25 October

Overcast. High 77°, low 55°.

Pressure30.18 inHg

Wind6.7 mph NE

Humidity34%

Visibility—

Dew point42°

Mon, 2679° / 58°

79 °

St. Johns, Monday, 26 October

Overcast. High 79°, low 58°.

Pressure30.03 inHg

Wind13.2 mph S

Humidity33%

Visibility—

Dew point44°

Tue, 2772° / 51°

72 °

St. Johns, Tuesday, 27 October

Partly cloudy. High 72°, low 51°.

Pressure30.06 inHg

Wind8.3 mph SW

Humidity33%

Visibility—

Dew point36°

Wed, 2869° / 53°

0.68

69 °

St. Johns, Wednesday, 28 October

Heavy rain. High 69°, low 53°.

Pressure29.74 inHg

Wind19.9 mph S

Humidity95%

Visibility—

Dew point59°

Thu, 2963° / 44°

63 °

St. Johns, Thursday, 29 October

Partly cloudy. High 63°, low 44°.

Pressure29.97 inHg

Wind15.3 mph NW

Humidity45%

Visibility—

Dew point37°

Fri, 3070° / 48°

70 °

St. Johns, Friday, 30 October

Clear. High 70°, low 48°.

Pressure30.06 inHg

Wind6.3 mph NW

Humidity41%

Visibility—

Dew point40°

Sat, 3174° / 51°

74 °

St. Johns, Saturday, 31 October

Partly cloudy. High 74°, low 51°.

Pressure29.97 inHg

Wind10.2 mph S

Humidity32%

Visibility—

Dew point39°

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. Johns, 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. Johns, 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.