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As of 21:59 CDT

Weather in Merriam, IL

48°Current weather

Merriam, Sunday, 18 October, 21:59

Clear. Feels like 48°. High 66°, low 37°.

Pressure30.39 inHg
Wind0 mph N
Humidity71%
Visibility6.2 mi
Dew point39°
Mon, 1970° / 40°0Clear
70 °Clear

Merriam, Monday, 19 October

Clear. High 70°, low 40°.

Pressure30.39 inHg
Wind1.3 mph SE
Humidity50%
Visibility6.2 mi
Dew point46°
Tue, 2069° / 46°0Clear
69 °Clear

Merriam, Tuesday, 20 October

Clear. High 69°, low 46°.

Pressure30.36 inHg
Wind2.9 mph NE
Humidity45%
Visibility6.2 mi
Dew point45°
Wed, 2170° / 45°0Clear
70 °Clear

Merriam, Wednesday, 21 October

Clear. High 70°, low 45°.

Pressure30.30 inHg
Wind0.7 mph N
Humidity48%
Visibility6.2 mi
Dew point47°
Thu, 2270° / 47°0Clear
70 °Clear

Merriam, Thursday, 22 October

Clear. High 70°, low 47°.

Pressure30.30 inHg
Wind5.1 mph NE
Humidity53%
Visibility6.2 mi
Dew point49°
Fri, 2369° / 48°0Clear
69 °Clear

Merriam, Friday, 23 October

Clear. High 69°, low 48°.

Pressure30.33 inHg
Wind7.2 mph E
Humidity48%
Visibility—
Dew point45°
Sat, 2474° / 48°0Overcast
74 °Overcast

Merriam, Saturday, 24 October

Overcast. High 74°, low 48°.

Pressure30.36 inHg
Wind8.8 mph S
Humidity45%
Visibility—
Dew point45°
Sun, 2569° / 58°0Overcast
69 °Overcast

Merriam, Sunday, 25 October

Overcast. High 69°, low 58°.

Pressure30.30 inHg
Wind12.8 mph W
Humidity45%
Visibility—
Dew point46°
Mon, 2673° / 53°0Overcast
73 °Overcast

Merriam, Monday, 26 October

Overcast. High 73°, low 53°.

Pressure30.24 inHg
Wind10.1 mph S
Humidity36%
Visibility—
Dew point40°
Tue, 2768° / 54°0Overcast
68 °Overcast

Merriam, Tuesday, 27 October

Overcast. High 68°, low 54°.

Pressure30.12 inHg
Wind8.7 mph SW
Humidity38%
Visibility—
Dew point40°
Wed, 2868° / 57°0Overcast
68 °Overcast

Merriam, Wednesday, 28 October

Overcast. High 68°, low 57°.

Pressure30.12 inHg
Wind8.1 mph E
Humidity51%
Visibility—
Dew point46°
Thu, 2974° / 60°0.07Light rain
74 °Light rain

Merriam, Thursday, 29 October

Light rain. High 74°, low 60°.

Pressure30.00 inHg
Wind13.1 mph SE
Humidity61%
Visibility—
Dew point57°
Fri, 3069° / 67°0.2Light rain
69 °Light rain

Merriam, Friday, 30 October

Light rain. High 69°, low 67°.

Pressure29.94 inHg
Wind15.9 mph S
Humidity86%
Visibility—
Dew point64°
Sat, 3168° / 61°3.67Heavy rain
68 °Heavy rain

Merriam, Saturday, 31 October

Heavy rain. High 68°, low 61°.

Pressure30.00 inHg
Wind16.9 mph SE
Humidity97%
Visibility—
Dew point64°
Sun, 0166° / 49°1.59Heavy rain
66 °Heavy rain

Merriam, Sunday, 1 November

Heavy rain. High 66°, low 49°.

Pressure29.97 inHg
Wind25.3 mph W
Humidity58%
Visibility—
Dew point42°
Mon, 0262° / 45°0Clear
62 °Clear

Merriam, Monday, 2 November

Clear. High 62°, low 45°.

Pressure30.06 inHg
Wind9.7 mph SW
Humidity44%
Visibility—
Dew point36°

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.