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As of 12:21 CDT

Weather in Sinclair, IL

83°Current weather

Sinclair, Saturday, 8 August, 12:21

Clear. Feels like 82°. High 87°, low 70°.

Pressure30.06 inHg
Wind6.2 mph NW
Humidity39%
Visibility6.2 mi
Dew point58°
Sun, 0992° / 70°0Clear
92 °Clear

Sinclair, Sunday, 9 August

Clear. High 92°, low 70°.

Pressure29.94 inHg
Wind15.6 mph S
Humidity60%
Visibility6.2 mi
Dew point72°
Mon, 1098° / 75°0Overcast
98 °Overcast

Sinclair, Monday, 10 August

Overcast. High 98°, low 75°.

Pressure29.91 inHg
Wind12.9 mph SW
Humidity51%
Visibility6.2 mi
Dew point70°
Tue, 11100° / 75°0.02Light rain
100 °Light rain

Sinclair, Tuesday, 11 August

Light rain. High 100°, low 75°.

Pressure29.83 inHg
Wind18.3 mph SW
Humidity45%
Visibility6.2 mi
Dew point68°
Wed, 1286° / 73°0.09Light rain
86 °Light rain

Sinclair, Wednesday, 12 August

Light rain. High 86°, low 73°.

Pressure29.83 inHg
Wind13.9 mph E
Humidity58%
Visibility6.2 mi
Dew point67°
Thu, 1373° / 64°0.84Heavy rain
73 °Heavy rain

Sinclair, Thursday, 13 August

Heavy rain. High 73°, low 64°.

Pressure29.88 inHg
Wind11.7 mph N
Humidity98%
Visibility—
Dew point69°
Fri, 1477° / 57°0Mostly clear
77 °Mostly clear

Sinclair, Friday, 14 August

Mostly clear. High 77°, low 57°.

Pressure30.18 inHg
Wind7.2 mph SE
Humidity47%
Visibility—
Dew point51°
Sat, 1578° / 58°0Overcast
78 °Overcast

Sinclair, Saturday, 15 August

Overcast. High 78°, low 58°.

Pressure30.18 inHg
Wind9 mph SE
Humidity53%
Visibility—
Dew point56°
Sun, 1671° / 65°0.31Rain
71 °Rain

Sinclair, Sunday, 16 August

Rain. High 71°, low 65°.

Pressure30.06 inHg
Wind15.2 mph SE
Humidity97%
Visibility—
Dew point68°
Mon, 1777° / 68°0.05Light rain
77 °Light rain

Sinclair, Monday, 17 August

Light rain. High 77°, low 68°.

Pressure29.97 inHg
Wind10.9 mph E
Humidity86%
Visibility—
Dew point70°
Tue, 1888° / 69°0.01Light rain
88 °Light rain

Sinclair, Tuesday, 18 August

Light rain. High 88°, low 69°.

Pressure29.91 inHg
Wind11 mph W
Humidity58%
Visibility—
Dew point67°
Wed, 1980° / 64°0.05Light rain
80 °Light rain

Sinclair, Wednesday, 19 August

Light rain. High 80°, low 64°.

Pressure29.97 inHg
Wind14.4 mph N
Humidity75%
Visibility—
Dew point67°
Thu, 2073° / 51°0Mostly clear
73 °Mostly clear

Sinclair, Thursday, 20 August

Mostly clear. High 73°, low 51°.

Pressure30.24 inHg
Wind12.5 mph NE
Humidity41%
Visibility—
Dew point44°
Fri, 2174° / 49°0Clear
74 °Clear

Sinclair, Friday, 21 August

Clear. High 74°, low 49°.

Pressure30.24 inHg
Wind7 mph E
Humidity40%
Visibility—
Dew point43°
Sat, 2277° / 53°0Clear
77 °Clear

Sinclair, Saturday, 22 August

Clear. High 77°, low 53°.

Pressure30.15 inHg
Wind7.3 mph S
Humidity43%
Visibility—
Dew point48°
Sun, 2380° / 55°0Clear
80 °Clear

Sinclair, Sunday, 23 August

Clear. High 80°, low 55°.

Pressure30.12 inHg
Wind8.4 mph S
Humidity39%
Visibility—
Dew point48°

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 Sinclair, 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 Sinclair, 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.