As of 02:20 CDT

Weather in St. Johns, IL

67°

St. Johns, Tuesday, 13 October, 02:20

Clear. Feels like 67°. High 93°, low 65°.

Pressure29.91 inHg

Wind9.3 mph SW

Humidity74%

Visibility6.2 mi

Dew point58°

See detailed hourly forecast

Wed, 1484° / 68°

0.09

84 °

St. Johns, Wednesday, 14 October

Light rain. High 84°, low 68°.

Pressure30.03 inHg

Wind4.6 mph W

Humidity76%

Visibility4.1 mi

Dew point72°

Thu, 1585° / 70°

0.16

85 °

St. Johns, Thursday, 15 October

Rain. High 85°, low 70°.

Pressure30.03 inHg

Wind8.4 mph SW

Humidity91%

Visibility3.0 mi

Dew point73°

Fri, 1673° / 53°

0.01

73 °

St. Johns, Friday, 16 October

Light rain. High 73°, low 53°.

Pressure30.30 inHg

Wind19.1 mph NW

Humidity39%

Visibility6.2 mi

Dew point34°

Sat, 1762° / 45°

62 °

St. Johns, Saturday, 17 October

Clear. High 62°, low 45°.

Pressure30.50 inHg

Wind10 mph N

Humidity44%

Visibility—

Dew point36°

Sun, 1869° / 44°

69 °

St. Johns, Sunday, 18 October

Clear. High 69°, low 44°.

Pressure30.33 inHg

Wind8.8 mph S

Humidity35%

Visibility—

Dew point34°

Mon, 1973° / 51°

73 °

St. Johns, Monday, 19 October

Overcast. High 73°, low 51°.

Pressure30.21 inHg

Wind10.8 mph S

Humidity46%

Visibility—

Dew point48°

Tue, 2075° / 60°

75 °

St. Johns, Tuesday, 20 October

Light rain. High 75°, low 60°.

Pressure30.15 inHg

Wind11.2 mph S

Humidity60%

Visibility—

Dew point58°

Wed, 2171° / 58°

71 °

St. Johns, Wednesday, 21 October

Overcast. High 71°, low 58°.

Pressure30.18 inHg

Wind11.3 mph SE

Humidity66%

Visibility—

Dew point56°

Thu, 2281° / 60°

81 °

St. Johns, Thursday, 22 October

Overcast. High 81°, low 60°.

Pressure30.06 inHg

Wind20 mph S

Humidity40%

Visibility—

Dew point52°

Fri, 2372° / 61°

0.11

72 °

St. Johns, Friday, 23 October

Light rain. High 72°, low 61°.

Pressure30.09 inHg

Wind21.8 mph S

Humidity75%

Visibility—

Dew point58°

Sat, 2467° / 49°

67 °

St. Johns, Saturday, 24 October

Overcast. High 67°, low 49°.

Pressure30.30 inHg

Wind10.6 mph NE

Humidity35%

Visibility—

Dew point36°

Sun, 2563° / 47°

63 °

St. Johns, Sunday, 25 October

Overcast. High 63°, low 47°.

Pressure30.27 inHg

Wind12.7 mph N

Humidity31%

Visibility—

Dew point30°

Mon, 2657° / 42°

0.01

57 °

St. Johns, Monday, 26 October

Light rain. High 57°, low 42°.

Pressure30.12 inHg

Wind7.1 mph W

Humidity45%

Visibility—

Dew point34°

Tue, 2769° / 42°

69 °

St. Johns, Tuesday, 27 October

Clear. High 69°, low 42°.

Pressure29.77 inHg

Wind15.7 mph NW

Humidity34%

Visibility—

Dew point35°

Wed, 2862° / 49°

62 °

St. Johns, Wednesday, 28 October

Clear. High 62°, low 49°.

Pressure29.88 inHg

Wind15.1 mph NW

Humidity32%

Visibility—

Dew point30°

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.