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As of 07:03 CDT

Weather in Port Byron, IL

69°Current weather

Port Byron, Sunday, 9 August, 07:03

Overcast. Feels like 70°. High 91°, low 65°.

Pressure29.94 inHg
Wind6 mph S
Humidity86%
Visibility6.2 mi
Dew point65°

10-day forecast for Port Byron, IL: 61° to 91°, with precipitation expected on 5 days. The table below breaks each day into morning, afternoon, evening and overnight.

90°
Best day: Tuesday, August 11
75° · 0.42 in
Worst day: Thursday, August 13

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

Mon, 1090° / 70°0.02Light rain
MorningClear77°feels 78°
AfternoonOvercast89°feels 99°
EveningOvercast78°feels 80°
OvernightOvercast77°feels 78°
90 °Light rain

Port Byron, Monday, 10 August

Light rain. High 90°, low 70°.

Pressure29.88 inHg
Wind2.1 mph E
Humidity73%
Visibility6.2 mi
Dew point75°
Tue, 1190° / 70°0Light rain
MorningOvercast74°feels 75°
AfternoonOvercast83°feels 89°
EveningClear79°feels 79°
OvernightClear72°feels 73°
90 °Light rain

Port Byron, Tuesday, 11 August

Light rain. High 90°, low 70°.

Pressure29.80 inHg
Wind7 mph S
Humidity71%
Visibility6.2 mi
Dew point72°
Wed, 1284° / 68°0.04Light rain
MorningOvercast73°feels 74°
AfternoonOvercast83°feels 88°
EveningMostly clear73°feels 73°
OvernightClear72°feels 73°
84 °Light rain

Port Byron, Wednesday, 12 August

Light rain. High 84°, low 68°.

Pressure29.83 inHg
Wind8.6 mph NE
Humidity66%
Visibility6.2 mi
Dew point71°
Thu, 1375° / 62°0.42Rain
MorningRain66°feels 66°
AfternoonRain73°feels 74°
EveningRain65°feels 66°
OvernightOvercast65°feels 65°
75 °Rain

Port Byron, Thursday, 13 August

Rain. High 75°, low 62°.

Pressure30.03 inHg
Wind10.5 mph NE
Humidity72%
Visibility—
Dew point64°
Fri, 1473° / 62°0.33Rain
MorningRain65°feels 65°
AfternoonRain71°feels 71°
EveningRain68°feels 68°
OvernightRain66°feels 66°
73 °Rain

Port Byron, Friday, 14 August

Rain. High 73°, low 62°.

Pressure30.15 inHg
Wind11.8 mph E
Humidity63%
Visibility—
Dew point57°
Sat, 1574° / 61°0.06Light rain
MorningLight rain65°feels 64°
AfternoonLight rain74°feels 74°
EveningLight rain69°feels 70°
OvernightLight rain67°feels 67°
74 °Light rain

Port Byron, Saturday, 15 August

Light rain. High 74°, low 61°.

Pressure30.21 inHg
Wind10.9 mph SE
Humidity65%
Visibility—
Dew point60°
Sun, 1677° / 66°0.03Light rain
MorningLight rain69°feels 69°
AfternoonLight rain75°feels 76°
EveningLight rain74°feels 76°
OvernightLight rain69°feels 69°
77 °Light rain

Port Byron, Sunday, 16 August

Light rain. High 77°, low 66°.

Pressure30.09 inHg
Wind5.3 mph E
Humidity83%
Visibility—
Dew point68°
Mon, 1782° / 65°0Overcast
MorningOvercast70°feels 71°
AfternoonOvercast80°feels 83°
EveningOvercast76°feels 77°
OvernightOvercast68°feels 69°
82 °Overcast

Port Byron, Monday, 17 August

Overcast. High 82°, low 65°.

Pressure30.09 inHg
Wind5.7 mph W
Humidity62%
Visibility—
Dew point65°
Tue, 1883° / 64°0Overcast
MorningOvercast70°feels 71°
AfternoonOvercast80°feels 83°
EveningOvercast78°feels 78°
OvernightOvercast70°feels 71°
83 °Overcast

Port Byron, Tuesday, 18 August

Overcast. High 83°, low 64°.

Pressure29.97 inHg
Wind11.8 mph S
Humidity68%
Visibility—
Dew point67°

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 Port Byron, 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.