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As of 16:22 CDT

Weather in South Jacksonville, IL

91°Current weather

South Jacksonville, Sunday, 9 August, 16:22

Overcast. Feels like 103°. High 91°, low 71°.

Pressure29.88 inHg
Wind15.5 mph S
Humidity65%
Visibility6.2 mi
Dew point77°
Mon, 1098° / 74°0.01Light rain
98 °Light rain

South Jacksonville, Monday, 10 August

Light rain. High 98°, low 74°.

Pressure29.91 inHg
Wind13.1 mph SW
Humidity41%
Visibility6.2 mi
Dew point67°
Tue, 11102° / 76°0.05Light rain
102 °Light rain

South Jacksonville, Tuesday, 11 August

Light rain. High 102°, low 76°.

Pressure29.83 inHg
Wind16.1 mph SW
Humidity38%
Visibility6.2 mi
Dew point67°
Wed, 1292° / 70°1.23Heavy rain
92 °Heavy rain

South Jacksonville, Wednesday, 12 August

Heavy rain. High 92°, low 70°.

Pressure29.85 inHg
Wind7.4 mph SE
Humidity60%
Visibility6.2 mi
Dew point73°
Thu, 1388° / 68°0.1Light rain
88 °Light rain

South Jacksonville, Thursday, 13 August

Light rain. High 88°, low 68°.

Pressure29.91 inHg
Wind11.1 mph S
Humidity73%
Visibility6.2 mi
Dew point72°
Fri, 1490° / 72°0Overcast
90 °Overcast

South Jacksonville, Friday, 14 August

Overcast. High 90°, low 72°.

Pressure29.91 inHg
Wind11.8 mph SE
Humidity58%
Visibility—
Dew point71°
Sat, 15102° / 74°0.01Light rain
102 °Light rain

South Jacksonville, Saturday, 15 August

Light rain. High 102°, low 74°.

Pressure29.91 inHg
Wind14 mph S
Humidity28%
Visibility—
Dew point59°
Sun, 1690° / 74°0Partly cloudy
90 °Partly cloudy

South Jacksonville, Sunday, 16 August

Partly cloudy. High 90°, low 74°.

Pressure29.97 inHg
Wind16.6 mph SW
Humidity56%
Visibility—
Dew point67°
Mon, 1791° / 66°0.08Light rain
91 °Light rain

South Jacksonville, Monday, 17 August

Light rain. High 91°, low 66°.

Pressure29.94 inHg
Wind18.1 mph SE
Humidity63%
Visibility—
Dew point69°
Tue, 1897° / 76°0Overcast
97 °Overcast

South Jacksonville, Tuesday, 18 August

Overcast. High 97°, low 76°.

Pressure29.88 inHg
Wind15.8 mph S
Humidity44%
Visibility—
Dew point66°
Wed, 1992° / 75°0.05Light rain
92 °Light rain

South Jacksonville, Wednesday, 19 August

Light rain. High 92°, low 75°.

Pressure30.00 inHg
Wind17.9 mph SE
Humidity43%
Visibility—
Dew point62°
Thu, 2097° / 71°0Partly cloudy
97 °Partly cloudy

South Jacksonville, Thursday, 20 August

Partly cloudy. High 97°, low 71°.

Pressure29.80 inHg
Wind9.4 mph NW
Humidity42%
Visibility—
Dew point65°
Fri, 2195° / 71°0Partly cloudy
95 °Partly cloudy

South Jacksonville, Friday, 21 August

Partly cloudy. High 95°, low 71°.

Pressure29.85 inHg
Wind17.1 mph N
Humidity46%
Visibility—
Dew point65°
Sat, 2289° / 60°0Clear
89 °Clear

South Jacksonville, Saturday, 22 August

Clear. High 89°, low 60°.

Pressure29.97 inHg
Wind7.9 mph E
Humidity47%
Visibility—
Dew point59°
Sun, 2391° / 66°0Partly cloudy
91 °Partly cloudy

South Jacksonville, Sunday, 23 August

Partly cloudy. High 91°, low 66°.

Pressure29.97 inHg
Wind8.7 mph SE
Humidity43%
Visibility—
Dew point61°
Mon, 24100° / 70°0.01Light rain
100 °Light rain

South Jacksonville, Monday, 24 August

Light rain. High 100°, low 70°.

Pressure29.97 inHg
Wind7.7 mph N
Humidity34%
Visibility—
Dew point60°

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 South Jacksonville, 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 South Jacksonville, 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.