EN
English Español

As of 21:26 CDT

Weather in McHenry, IL

69°Current weather

McHenry, Saturday, 8 August, 21:26

Clear. Feels like 69°. High 82°, low 68°.

Pressure30.03 inHg
Wind3.2 mph W
Humidity82%
Visibility6.2 mi
Dew point63°
Sun, 0983° / 63°0.95Heavy rain
83 °Heavy rain

McHenry, Sunday, 9 August

Heavy rain. High 83°, low 63°.

Pressure29.94 inHg
Wind11.1 mph S
Humidity88%
Visibility6.2 mi
Dew point71°
Mon, 1084° / 69°0.83Heavy rain
84 °Heavy rain

McHenry, Monday, 10 August

Heavy rain. High 84°, low 69°.

Pressure29.91 inHg
Wind4.6 mph SE
Humidity74%
Visibility6.2 mi
Dew point68°
Tue, 1183° / 67°0.63Heavy rain
83 °Heavy rain

McHenry, Tuesday, 11 August

Heavy rain. High 83°, low 67°.

Pressure29.77 inHg
Wind2.9 mph SE
Humidity88%
Visibility6.2 mi
Dew point73°
Wed, 1280° / 64°0.01Light rain
80 °Light rain

McHenry, Wednesday, 12 August

Light rain. High 80°, low 64°.

Pressure29.85 inHg
Wind6.5 mph W
Humidity72%
Visibility6.2 mi
Dew point69°
Thu, 1369° / 60°0Overcast
69 °Overcast

McHenry, Thursday, 13 August

Overcast. High 69°, low 60°.

Pressure30.03 inHg
Wind8.4 mph E
Humidity70%
Visibility—
Dew point58°
Fri, 1478° / 56°0Clear
78 °Clear

McHenry, Friday, 14 August

Clear. High 78°, low 56°.

Pressure30.12 inHg
Wind6.6 mph E
Humidity53%
Visibility—
Dew point55°
Sat, 1575° / 58°0Overcast
75 °Overcast

McHenry, Saturday, 15 August

Overcast. High 75°, low 58°.

Pressure30.27 inHg
Wind10.2 mph SW
Humidity55%
Visibility—
Dew point56°
Sun, 1675° / 57°0Overcast
75 °Overcast

McHenry, Sunday, 16 August

Overcast. High 75°, low 57°.

Pressure30.15 inHg
Wind4.3 mph NE
Humidity66%
Visibility—
Dew point58°
Mon, 1780° / 63°0.02Light rain
80 °Light rain

McHenry, Monday, 17 August

Light rain. High 80°, low 63°.

Pressure30.03 inHg
Wind4.9 mph W
Humidity63%
Visibility—
Dew point62°
Tue, 1882° / 65°0Overcast
82 °Overcast

McHenry, Tuesday, 18 August

Overcast. High 82°, low 65°.

Pressure29.97 inHg
Wind13.4 mph SW
Humidity66%
Visibility—
Dew point66°
Wed, 1973° / 58°0.01Light rain
73 °Light rain

McHenry, Wednesday, 19 August

Light rain. High 73°, low 58°.

Pressure29.94 inHg
Wind17.6 mph NW
Humidity77%
Visibility—
Dew point58°
Thu, 2067° / 52°0Overcast
67 °Overcast

McHenry, Thursday, 20 August

Overcast. High 67°, low 52°.

Pressure30.06 inHg
Wind9.8 mph N
Humidity59%
Visibility—
Dew point50°
Fri, 2173° / 53°0Clear
73 °Clear

McHenry, Friday, 21 August

Clear. High 73°, low 53°.

Pressure30.09 inHg
Wind9.1 mph E
Humidity52%
Visibility—
Dew point52°
Sat, 2267° / 55°0.05Light rain
67 °Light rain

McHenry, Saturday, 22 August

Light rain. High 67°, low 55°.

Pressure29.88 inHg
Wind8.4 mph E
Humidity91%
Visibility—
Dew point57°
Sun, 2379° / 64°0.01Light rain
79 °Light rain

McHenry, Sunday, 23 August

Light rain. High 79°, low 64°.

Pressure29.88 inHg
Wind15.6 mph W
Humidity48%
Visibility—
Dew point56°

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 McHenry, 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 McHenry, 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.