As of 06:17 CDT

Weather in Merriam, IL

41°

Merriam, Monday, 19 October, 06:17

Clear. Feels like 41°. High 71°, low 41°.

Pressure30.42 inHg

Wind0 mph N

Humidity93%

Visibility6.2 mi

Dew point39°

See detailed hourly forecast

Tue, 2073° / 43°

73 °

Merriam, Tuesday, 20 October

Clear. High 73°, low 43°.

Pressure30.36 inHg

Wind1.7 mph N

Humidity43%

Visibility6.2 mi

Dew point44°

Wed, 2171° / 45°

71 °

Merriam, Wednesday, 21 October

Clear. High 71°, low 45°.

Pressure30.27 inHg

Wind1.2 mph NE

Humidity46%

Visibility6.2 mi

Dew point47°

Thu, 2271° / 48°

71 °

Merriam, Thursday, 22 October

Clear. High 71°, low 48°.

Pressure30.30 inHg

Wind4.6 mph NE

Humidity47%

Visibility6.2 mi

Dew point48°

Fri, 2369° / 49°

69 °

Merriam, Friday, 23 October

Clear. High 69°, low 49°.

Pressure30.30 inHg

Wind7.1 mph E

Humidity48%

Visibility—

Dew point46°

Sat, 2471° / 48°

71 °

Merriam, Saturday, 24 October

Overcast. High 71°, low 48°.

Pressure30.39 inHg

Wind7 mph E

Humidity44%

Visibility—

Dew point42°

Sun, 2576° / 55°

76 °

Merriam, Sunday, 25 October

Overcast. High 76°, low 55°.

Pressure30.33 inHg

Wind13.2 mph SW

Humidity33%

Visibility—

Dew point40°

Mon, 2674° / 57°

74 °

Merriam, Monday, 26 October

Overcast. High 74°, low 57°.

Pressure30.24 inHg

Wind10.8 mph SW

Humidity32%

Visibility—

Dew point39°

Tue, 2774° / 55°

74 °

Merriam, Tuesday, 27 October

Overcast. High 74°, low 55°.

Pressure30.09 inHg

Wind12.1 mph SW

Humidity31%

Visibility—

Dew point39°

Wed, 2856° / 44°

0.07

56 °

Merriam, Wednesday, 28 October

Light rain. High 56°, low 44°.

Pressure30.30 inHg

Wind13.8 mph NE

Humidity66%

Visibility—

Dew point38°

Thu, 2953° / 34°

53 °

Merriam, Thursday, 29 October

Partly cloudy. High 53°, low 34°.

Pressure30.30 inHg

Wind12.4 mph NE

Humidity28%

Visibility—

Dew point17°

Fri, 3055° / 32°

55 °

Merriam, Friday, 30 October

Clear. High 55°, low 32°.

Pressure30.42 inHg

Wind11.5 mph NE

Humidity23%

Visibility—

Dew point13°

Sat, 3161° / 34°

61 °

Merriam, Saturday, 31 October

Overcast. High 61°, low 34°.

Pressure30.45 inHg

Wind11 mph SE

Humidity19%

Visibility—

Dew point12°

Sun, 0166° / 42°

66 °

Merriam, Sunday, 1 November

Overcast. High 66°, low 42°.

Pressure30.42 inHg

Wind13.1 mph S

Humidity21%

Visibility—

Dew point20°

Mon, 0270° / 45°

70 °

Merriam, Monday, 2 November

Overcast. High 70°, low 45°.

Pressure30.30 inHg

Wind14.7 mph S

Humidity26%

Visibility—

Dew point28°

Tue, 0358° / 50°

0.09

58 °

Merriam, Tuesday, 3 November

Light rain. High 58°, low 50°.

Pressure30.24 inHg

Wind10.9 mph S

Humidity40%

Visibility—

Dew point33°

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 Merriam, 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 Merriam, 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.