As of 08:35 CDT

Weather in Merriam, IL

70°

Merriam, Thursday, 15 October, 08:35

Overcast. Feels like 71°. High 80°, low 69°.

Pressure30.03 inHg

Wind4.6 mph SE

Humidity100%

Visibility0.1 mi

Dew point70°

See detailed hourly forecast

Fri, 1670° / 52°

0.03

70 °

Merriam, Friday, 16 October

Light rain. High 70°, low 52°.

Pressure30.15 inHg

Wind17.9 mph NW

Humidity44%

Visibility6.2 mi

Dew point38°

Sat, 1759° / 45°

59 °

Merriam, Saturday, 17 October

Clear. High 59°, low 45°.

Pressure30.56 inHg

Wind6.9 mph NE

Humidity49%

Visibility6.2 mi

Dew point37°

Sun, 1864° / 42°

64 °

Merriam, Sunday, 18 October

Clear. High 64°, low 42°.

Pressure30.50 inHg

Wind6.9 mph SE

Humidity43%

Visibility6.2 mi

Dew point37°

Mon, 1968° / 45°

68 °

Merriam, Monday, 19 October

Partly cloudy. High 68°, low 45°.

Pressure30.39 inHg

Wind6.8 mph S

Humidity41%

Visibility—

Dew point40°

Tue, 2072° / 47°

72 °

Merriam, Tuesday, 20 October

Overcast. High 72°, low 47°.

Pressure30.33 inHg

Wind4.5 mph SE

Humidity46%

Visibility—

Dew point46°

Wed, 2175° / 53°

75 °

Merriam, Wednesday, 21 October

Clear. High 75°, low 53°.

Pressure30.30 inHg

Wind6.1 mph E

Humidity33%

Visibility—

Dew point40°

Thu, 2275° / 53°

75 °

Merriam, Thursday, 22 October

Clear. High 75°, low 53°.

Pressure30.24 inHg

Wind7.2 mph E

Humidity29%

Visibility—

Dew point37°

Fri, 2377° / 54°

77 °

Merriam, Friday, 23 October

Overcast. High 77°, low 54°.

Pressure30.21 inHg

Wind10 mph SE

Humidity30%

Visibility—

Dew point39°

Sat, 2477° / 54°

77 °

Merriam, Saturday, 24 October

Overcast. High 77°, low 54°.

Pressure30.21 inHg

Wind15 mph S

Humidity32%

Visibility—

Dew point42°

Sun, 2575° / 57°

75 °

Merriam, Sunday, 25 October

Clear. High 75°, low 57°.

Pressure30.42 inHg

Wind10 mph NE

Humidity49%

Visibility—

Dew point51°

Mon, 2676° / 53°

76 °

Merriam, Monday, 26 October

Partly cloudy. High 76°, low 53°.

Pressure30.39 inHg

Wind9.1 mph NE

Humidity43%

Visibility—

Dew point48°

Tue, 2779° / 58°

79 °

Merriam, Tuesday, 27 October

Overcast. High 79°, low 58°.

Pressure30.21 inHg

Wind15.5 mph SW

Humidity32%

Visibility—

Dew point44°

Wed, 2877° / 59°

77 °

Merriam, Wednesday, 28 October

Overcast. High 77°, low 59°.

Pressure30.12 inHg

Wind17.2 mph SW

Humidity23%

Visibility—

Dew point35°

Thu, 2979° / 61°

0.1

79 °

Merriam, Thursday, 29 October

Light rain. High 79°, low 61°.

Pressure30.06 inHg

Wind16.3 mph SW

Humidity61%

Visibility—

Dew point54°

Fri, 3076° / 65°

0.74

76 °

Merriam, Friday, 30 October

Rain. High 76°, low 65°.

Pressure29.85 inHg

Wind18.1 mph S

Humidity86%

Visibility—

Dew point64°

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.