As of 11:11 CDT

Weather in Merriam, IL

52°

Merriam, Saturday, 17 October, 11:11

Clear. Feels like 49°. High 55°, low 43°.

Pressure30.56 inHg

Wind8.1 mph NE

Humidity54%

Visibility6.2 mi

Dew point34°

See detailed hourly forecast

Sun, 1863° / 40°

63 °

Merriam, Sunday, 18 October

Clear. High 63°, low 40°.

Pressure30.50 inHg

Wind6.5 mph SE

Humidity49%

Visibility6.2 mi

Dew point40°

Mon, 1967° / 42°

67 °

Merriam, Monday, 19 October

Clear. High 67°, low 42°.

Pressure30.42 inHg

Wind0.8 mph SE

Humidity46%

Visibility6.2 mi

Dew point43°

Tue, 2070° / 44°

70 °

Merriam, Tuesday, 20 October

Clear. High 70°, low 44°.

Pressure30.36 inHg

Wind2.3 mph E

Humidity48%

Visibility6.2 mi

Dew point47°

Wed, 2171° / 45°

71 °

Merriam, Wednesday, 21 October

Mostly clear. High 71°, low 45°.

Pressure30.27 inHg

Wind4.4 mph E

Humidity39%

Visibility—

Dew point41°

Thu, 2272° / 48°

72 °

Merriam, Thursday, 22 October

Clear. High 72°, low 48°.

Pressure30.24 inHg

Wind4.6 mph NE

Humidity39%

Visibility—

Dew point42°

Fri, 2375° / 53°

75 °

Merriam, Friday, 23 October

Clear. High 75°, low 53°.

Pressure30.18 inHg

Wind8.3 mph SE

Humidity31%

Visibility—

Dew point38°

Sat, 2474° / 53°

74 °

Merriam, Saturday, 24 October

Overcast. High 74°, low 53°.

Pressure30.18 inHg

Wind9.4 mph SE

Humidity29%

Visibility—

Dew point36°

Sun, 2580° / 60°

80 °

Merriam, Sunday, 25 October

Overcast. High 80°, low 60°.

Pressure30.12 inHg

Wind12.9 mph SW

Humidity35%

Visibility—

Dew point46°

Mon, 2678° / 61°

78 °

Merriam, Monday, 26 October

Clear. High 78°, low 61°.

Pressure30.15 inHg

Wind7.6 mph E

Humidity49%

Visibility—

Dew point54°

Tue, 2776° / 62°

76 °

Merriam, Tuesday, 27 October

Overcast. High 76°, low 62°.

Pressure30.12 inHg

Wind13.6 mph S

Humidity34%

Visibility—

Dew point43°

Wed, 2869° / 59°

0.07

69 °

Merriam, Wednesday, 28 October

Light rain. High 69°, low 59°.

Pressure30.03 inHg

Wind15.3 mph S

Humidity43%

Visibility—

Dew point44°

Thu, 2964° / 61°

0.09

64 °

Merriam, Thursday, 29 October

Light rain. High 64°, low 61°.

Pressure30.09 inHg

Wind13.7 mph SW

Humidity83%

Visibility—

Dew point58°

Fri, 3077° / 62°

0.08

77 °

Merriam, Friday, 30 October

Light rain. High 77°, low 62°.

Pressure29.85 inHg

Wind20 mph S

Humidity60%

Visibility—

Dew point61°

Sat, 3173° / 53°

0.27

73 °

Merriam, Saturday, 31 October

Light rain. High 73°, low 53°.

Pressure29.80 inHg

Wind23.4 mph SW

Humidity84%

Visibility—

Dew point66°

Sun, 0167° / 47°

67 °

Merriam, Sunday, 1 November

Clear. High 67°, low 47°.

Pressure30.15 inHg

Wind6.9 mph E

Humidity34%

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.