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As of 12:18 CDT

Weather in Marissa, IL

86°Current weather

Marissa, Saturday, 8 August, 12:18

Clear. Feels like 96°. High 88°, low 70°.

Pressure30.09 inHg
Wind3.7 mph SW
Humidity71%
Visibility6.2 mi
Dew point77°
Sun, 0992° / 71°0Mostly clear
92 °Mostly clear

Marissa, Sunday, 9 August

Mostly clear. High 92°, low 71°.

Pressure30.00 inHg
Wind9.6 mph S
Humidity53%
Visibility6.2 mi
Dew point69°
Mon, 1099° / 73°0Partly cloudy
99 °Partly cloudy

Marissa, Monday, 10 August

Partly cloudy. High 99°, low 73°.

Pressure29.97 inHg
Wind12.6 mph SW
Humidity46%
Visibility6.2 mi
Dew point70°
Tue, 11101° / 76°0Mostly clear
101 °Mostly clear

Marissa, Tuesday, 11 August

Mostly clear. High 101°, low 76°.

Pressure29.88 inHg
Wind12.8 mph SW
Humidity39%
Visibility6.2 mi
Dew point67°
Wed, 1293° / 75°0.04Light rain
93 °Light rain

Marissa, Wednesday, 12 August

Light rain. High 93°, low 75°.

Pressure29.83 inHg
Wind11.4 mph NW
Humidity46%
Visibility6.2 mi
Dew point69°
Thu, 1378° / 70°0.27Light rain
78 °Light rain

Marissa, Thursday, 13 August

Light rain. High 78°, low 70°.

Pressure29.88 inHg
Wind9.9 mph NW
Humidity93%
Visibility—
Dew point72°
Fri, 1479° / 61°0Overcast
79 °Overcast

Marissa, Friday, 14 August

Overcast. High 79°, low 61°.

Pressure30.15 inHg
Wind7 mph NE
Humidity52%
Visibility—
Dew point56°
Sat, 1581° / 60°0.01Light rain
81 °Light rain

Marissa, Saturday, 15 August

Light rain. High 81°, low 60°.

Pressure30.18 inHg
Wind7.8 mph S
Humidity52%
Visibility—
Dew point58°
Sun, 1681° / 67°1.29Heavy rain
81 °Heavy rain

Marissa, Sunday, 16 August

Heavy rain. High 81°, low 67°.

Pressure30.06 inHg
Wind14.6 mph SE
Humidity93%
Visibility—
Dew point70°
Mon, 1788° / 74°0Partly cloudy
88 °Partly cloudy

Marissa, Monday, 17 August

Partly cloudy. High 88°, low 74°.

Pressure29.91 inHg
Wind15.9 mph S
Humidity65%
Visibility—
Dew point73°
Tue, 1890° / 71°0.02Light rain
90 °Light rain

Marissa, Tuesday, 18 August

Light rain. High 90°, low 71°.

Pressure29.91 inHg
Wind8.1 mph NW
Humidity58%
Visibility—
Dew point69°
Wed, 1991° / 68°1.05Heavy rain
91 °Heavy rain

Marissa, Wednesday, 19 August

Heavy rain. High 91°, low 68°.

Pressure29.91 inHg
Wind17.2 mph N
Humidity55%
Visibility—
Dew point70°
Thu, 2072° / 58°0Clear
72 °Clear

Marissa, Thursday, 20 August

Clear. High 72°, low 58°.

Pressure30.18 inHg
Wind14.4 mph N
Humidity49%
Visibility—
Dew point50°
Fri, 2173° / 52°0Clear
73 °Clear

Marissa, Friday, 21 August

Clear. High 73°, low 52°.

Pressure30.21 inHg
Wind7.1 mph NE
Humidity52%
Visibility—
Dew point50°
Sat, 2275° / 53°0Partly cloudy
75 °Partly cloudy

Marissa, Saturday, 22 August

Partly cloudy. High 75°, low 53°.

Pressure30.15 inHg
Wind5.7 mph E
Humidity48%
Visibility—
Dew point50°
Sun, 2378° / 55°0Clear
78 °Clear

Marissa, Sunday, 23 August

Clear. High 78°, low 55°.

Pressure30.12 inHg
Wind6.8 mph SE
Humidity48%
Visibility—
Dew point52°

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 Marissa, 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 Marissa, 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.