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As of 21:30 CDT

Weather in Williamson, IL

78°Current weather

Williamson, Saturday, 8 August, 21:30

Clear. Feels like 80°. High 89°, low 70°.

Pressure30.00 inHg
Wind8.1 mph SE
Humidity81%
Visibility6.2 mi
Dew point72°

Two-week outlook for Williamson, IL: week one averages a high of 88.1° and week two 77.5°, so week two runs 10.6° cooler than week one. Around 3.8 inches of precipitation are expected over the 14 days, across 8 wet days. The nearest weekend, August 8: 89°, dry.

Week one vs week two

WeekHighLowPrecipitationVs normal
1st (August 8 – August 14)88.1°70.4°3.0 in / 4 d—
2nd (August 15 – August 21)77.5°63.7°0.8 in / 4 d—

Weekend weather

Sat, August 8
Clear
89°70°
no precip.
Sun, August 9
Overcast
95°73°
no precip.
Sat, August 15
Rain
75°67°
0.23 in
Sun, August 16
Light rain
77°65°
0.31 in
Sun, 0995° / 73°0Overcast
95 °Overcast

Williamson, Sunday, 9 August

Overcast. High 95°, low 73°.

Pressure29.97 inHg
Wind13.9 mph S
Humidity70%
Visibility6.2 mi
Dew point74°
Mon, 1094° / 74°0.02Light rain
94 °Light rain

Williamson, Monday, 10 August

Light rain. High 94°, low 74°.

Pressure29.94 inHg
Wind11.4 mph SW
Humidity61%
Visibility6.2 mi
Dew point74°
Tue, 1196° / 72°0.08Rain
96 °Rain

Williamson, Tuesday, 11 August

Rain. High 96°, low 72°.

Pressure29.88 inHg
Wind11.8 mph S
Humidity62%
Visibility6.2 mi
Dew point75°
Wed, 1286° / 72°0.15Light rain
86 °Light rain

Williamson, Wednesday, 12 August

Light rain. High 86°, low 72°.

Pressure29.85 inHg
Wind6.2 mph W
Humidity73%
Visibility6.2 mi
Dew point72°
Thu, 1382° / 66°2.07Heavy rain
82 °Heavy rain

Williamson, Thursday, 13 August

Heavy rain. High 82°, low 66°.

Pressure29.91 inHg
Wind15.3 mph E
Humidity76%
Visibility—
Dew point72°
Fri, 1475° / 66°0.65Rain
75 °Rain

Williamson, Friday, 14 August

Rain. High 75°, low 66°.

Pressure30.06 inHg
Wind10.8 mph E
Humidity93%
Visibility—
Dew point68°
Sat, 1575° / 67°0.23Rain
75 °Rain

Williamson, Saturday, 15 August

Rain. High 75°, low 67°.

Pressure30.18 inHg
Wind14.2 mph SE
Humidity81%
Visibility—
Dew point66°
Sun, 1677° / 65°0.31Light rain
77 °Light rain

Williamson, Sunday, 16 August

Light rain. High 77°, low 65°.

Pressure30.06 inHg
Wind10.5 mph E
Humidity84%
Visibility—
Dew point69°
Mon, 1779° / 67°0.19Light rain
79 °Light rain

Williamson, Monday, 17 August

Light rain. High 79°, low 67°.

Pressure30.03 inHg
Wind6.9 mph NE
Humidity87%
Visibility—
Dew point70°
Tue, 1880° / 67°0.07Light rain
80 °Light rain

Williamson, Tuesday, 18 August

Light rain. High 80°, low 67°.

Pressure30.03 inHg
Wind6.2 mph SW
Humidity81%
Visibility—
Dew point72°
Wed, 1983° / 68°0Overcast
83 °Overcast

Williamson, Wednesday, 19 August

Overcast. High 83°, low 68°.

Pressure29.91 inHg
Wind13.2 mph N
Humidity71%
Visibility—
Dew point71°
Thu, 2074° / 57°0Overcast
74 °Overcast

Williamson, Thursday, 20 August

Overcast. High 74°, low 57°.

Pressure30.03 inHg
Wind14.1 mph NE
Humidity65%
Visibility—
Dew point57°
Fri, 2173° / 55°0.01Light rain
73 °Light rain

Williamson, Friday, 21 August

Light rain. High 73°, low 55°.

Pressure30.03 inHg
Wind10.6 mph SE
Humidity64%
Visibility—
Dew point56°

About this forecast

Can I plan a trip on a 2-week forecast?

Week one is solid for planning — accuracy is high. Week two shows the trend: go by the averages and the comparison with normal, and check the details closer to the date.

What does the "Vs normal" column mean?

It is the gap between the forecast and the climate normal for those same dates in Williamson, IL, computed over 60 years. A positive value means the week runs warmer than usual.

Why are weekends shown separately?

Saturday and Sunday plans are what people check most, so we give them their own cards with temperature and precipitation.