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As of 00:20 CDT

Weather in St. Johns, IL

74°Current weather

St. Johns, Sunday, 9 August, 00:20

Clear. Feels like 75°. High 93°, low 73°.

Pressure30.03 inHg
Wind7.3 mph S
Humidity89%
Visibility6.2 mi
Dew point69°

10-day forecast for St. Johns, IL: 67° to 100°, with precipitation expected on 7 days. The table below breaks each day into morning, afternoon, evening and overnight.

100°
Best day: Tuesday, August 11
81° · 1.92 in
Worst day: Thursday, August 13

Tap any day below to see morning, afternoon, evening and overnight.

Mon, 1095° / 75°0Overcast
MorningPartly cloudy78°feels 79°
AfternoonClear95°feels 101°
EveningMostly clear87°feels 91°
OvernightClear80°feels 80°
95 °Overcast

St. Johns, Monday, 10 August

Overcast. High 95°, low 75°.

Pressure30.00 inHg
Wind13.7 mph SW
Humidity52%
Visibility6.2 mi
Dew point71°
Tue, 11100° / 76°0Clear
MorningPartly cloudy79°feels 79°
AfternoonClear99°feels 104°
EveningOvercast90°feels 95°
OvernightOvercast82°feels 84°
100 °Clear

St. Johns, Tuesday, 11 August

Clear. High 100°, low 76°.

Pressure29.91 inHg
Wind12.8 mph SW
Humidity41%
Visibility6.2 mi
Dew point69°
Wed, 1289° / 74°0.13Light rain
MorningOvercast77°feels 78°
AfternoonLight rain76°feels 78°
EveningLight rain79°feels 79°
OvernightOvercast86°feels 88°
89 °Light rain

St. Johns, Wednesday, 12 August

Light rain. High 89°, low 74°.

Pressure29.85 inHg
Wind5.2 mph SW
Humidity67%
Visibility6.2 mi
Dew point70°
Thu, 1381° / 71°1.92Heavy rain
MorningHeavy rain73°feels 74°
AfternoonHeavy rain74°feels 75°
EveningHeavy rain74°feels 75°
OvernightHeavy rain72°feels 74°
81 °Heavy rain

St. Johns, Thursday, 13 August

Heavy rain. High 81°, low 71°.

Pressure29.91 inHg
Wind14.1 mph E
Humidity94%
Visibility—
Dew point72°
Fri, 1480° / 71°0.17Light rain
MorningLight rain73°feels 74°
AfternoonLight rain78°feels 78°
EveningLight rain73°feels 74°
OvernightLight rain71°feels 72°
80 °Light rain

St. Johns, Friday, 14 August

Light rain. High 80°, low 71°.

Pressure30.00 inHg
Wind11.7 mph E
Humidity82%
Visibility—
Dew point72°
Sat, 1581° / 67°0.15Light rain
MorningLight rain69°feels 70°
AfternoonLight rain74°feels 75°
EveningLight rain75°feels 76°
OvernightLight rain70°feels 71°
81 °Light rain

St. Johns, Saturday, 15 August

Light rain. High 81°, low 67°.

Pressure30.18 inHg
Wind13 mph SE
Humidity81%
Visibility—
Dew point67°
Sun, 1687° / 67°0.06Light rain
MorningLight rain73°feels 75°
AfternoonLight rain85°feels 92°
EveningLight rain80°feels 85°
OvernightLight rain73°feels 74°
87 °Light rain

St. Johns, Sunday, 16 August

Light rain. High 87°, low 67°.

Pressure30.03 inHg
Wind9.7 mph E
Humidity70%
Visibility—
Dew point72°
Mon, 1786° / 70°0.1Light rain
MorningLight rain73°feels 76°
AfternoonLight rain81°feels 86°
EveningLight rain79°feels 84°
OvernightLight rain73°feels 74°
86 °Light rain

St. Johns, Monday, 17 August

Light rain. High 86°, low 70°.

Pressure30.03 inHg
Wind8.7 mph NE
Humidity81%
Visibility—
Dew point73°
Tue, 1886° / 70°0.13Light rain
MorningLight rain75°feels 78°
AfternoonLight rain84°feels 92°
EveningLight rain77°feels 79°
OvernightLight rain72°feels 73°
86 °Light rain

St. Johns, Tuesday, 18 August

Light rain. High 86°, low 70°.

Pressure30.00 inHg
Wind7.6 mph E
Humidity70%
Visibility—
Dew point73°

About this forecast

How reliable is a 10-day forecast?

The first 3–5 days are the most reliable, typically within 2–4°. From day six to ten the models show the trend: the direction of change is right more often than the exact numbers.

What does the time-of-day table show?

Temperature in St. Johns, IL around 8am, 2pm, 8pm and 2am each day — handy for planning a walk, a drive or work outdoors.

How is the best day chosen?

We weigh the daytime high against precipitation: a warm, dry day scores highest.