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Marissa IL Weather - Clear - 69°F
Clear
69°F
Updated 6:46 am
Feels Like 75°F
Humidity 100%
Wind N 0 mph
Barometer  30.03 in
Dew Point 69°F
Marissa IL Weather - Clear - 21°C
Clear
21°C
Updated 6:46 am
Feels Like 24°C
Humidity 100%
Wind N 0 km/h
Barometer  101.6 kPa
Dew Point 21°C
Marissa, IL Weather and Current Conditionsmarissa il weather forecast

Marissa, IL Weather Forecast

Marissa Illinois WeatherMarissa, Illinois Weather Weather Forecast
14 day API weather forecast for Marissa, Illinois. Note: The 7-day weather forecast for Marissa, IL is the most reliable and accurate weather forecast. This model should only be used as a likely scenario. It is difficult to predict weather more than 7 days ahead.
Marissa, IL Weather Forecast Dated: 646 AM Sun Sep 13 2026
Expect a very warm period with a mix of sun and clouds and frequent chances of rain over the coming period. generally humid conditions and no major pressure swings will dominate. Isolated storms at times.

Sunday, September 13, 2026

Mid-Morning
Marissa Weather - 2026-09-13 - Morning - Overcast
76°F 24°C
Overcast
Mid-Afternoon
Marissa Weather - 2026-09-13 - Afternoon - Partly Cloudy
95°F 35°C
Partly Cloudy
Early-Evening
Marissa Weather - 2026-09-13 - Evening - Scattered Showers
80°F 27°C
Scattered Showers
Very hot with temperatures reaching 95°F 35°C, periods of heavy rain and gusty conditions, with steady humidity and steady pressure. Winds turning from the WSW to the NNE at 8 mph 13 km/h.

Monday, September 14, 2026

Mid-Morning
Marissa Weather - 2026-09-14 - Morning - Cloudy
68°F 20°C
Cloudy
Mid-Afternoon
Marissa Weather - 2026-09-14 - Afternoon - Sunny
88°F 31°C
Sunny
Early-Evening
Marissa Weather - 2026-09-14 - Evening - Overcast
84°F 29°C
Overcast
Balmy with temperatures reaching 88°F 31°C, cloudy in the morning, sunny in the afternoon, and cloudy this evening, with lower humidity and barometric pressure falling. Winds switching from the E to the SE at 11 mph 18 km/h. Gusts up to 21 mph 34 km/h.

Tuesday, September 15, 2026

Mid-Morning
Marissa Weather - 2026-09-15 - Morning - Sunny
82°F 28°C
Sunny
Mid-Afternoon
Marissa Weather - 2026-09-15 - Afternoon - Overcast
101°F 38°C
Overcast
Early-Evening
Marissa Weather - 2026-09-15 - Evening - Scattered Showers
83°F 28°C
Scattered Showers
Dangerously hot temperatures around 101°F 38°C, locally heavy downpours at times, with increasing humidity and steady pressure. Winds moving from the SSW to the N at 10 mph 17 km/h.

Wednesday, September 16, 2026

Mid-Morning
Marissa Weather - 2026-09-16 - Morning - Overcast
77°F 25°C
Overcast
Mid-Afternoon
Marissa Weather - 2026-09-16 - Afternoon - Sunny
96°F 35°C
Sunny
Early-Evening
Marissa Weather - 2026-09-16 - Evening - Sunny
88°F 31°C
Sunny
Sizzling hot near 96°F 35°C with a heat index reaching 101°F 38°C, overcast in the morning, sunny in the afternoon, and cloudy this evening, with lower humidity and steady pressure.

Thursday, September 17, 2026

Mid-Morning
Marissa Weather - 2026-09-17 - Morning - Sunny
83°F 28°C
Sunny
Mid-Afternoon
Marissa Weather - 2026-09-17 - Afternoon - Sunny
97°F 36°C
Sunny
Early-Evening
Marissa Weather - 2026-09-17 - Evening - Sunny
90°F 32°C
Sunny
Hot and sweltering around 97°F 36°C (heat index 100°F 38°C), sunny through the afternoon, turning partly cloudy this evening, with steady humidity and steady pressure. Winds swinging from the SW to the SSE at 6 mph 10 km/h.

Friday, September 18, 2026

Mid-Morning
Marissa Weather - 2026-09-18 - Morning - Light Fog
77°F 25°C
Light Fog
Mid-Afternoon
Marissa Weather - 2026-09-18 - Afternoon - Sunny
91°F 33°C
Sunny
Early-Evening
Marissa Weather - 2026-09-18 - Evening - Cloudy
81°F 28°C
Cloudy
Very hot with a high of 91°F 33°C, feeling closer to 95°F 35°C in the humidity, overcast in the morning, becoming cloudy through the afternoon and evening, with steady humidity and steady pressure. Winds shifting from the NE to the ENE at 8 mph 13 km/h.

Saturday, September 19, 2026

Mid-Morning
Marissa Weather - 2026-09-19 - Morning - Light Fog
77°F 25°C
Light Fog
Mid-Afternoon
Marissa Weather - 2026-09-19 - Afternoon - Nearby Thunderstorms
95°F 35°C
Nearby Thunderstorms
Early-Evening
Marissa Weather - 2026-09-19 - Evening - Nearby Thunderstorms
82°F 28°C
Nearby Thunderstorms
Sizzling hot near 95°F 35°C with a heat index reaching 99°F 37°C, periods of heavy thunderstorms, with steady humidity and barometric pressure falling. Winds turning from the SSE to the S at 13 mph 20 km/h.

Sunday, September 20, 2026

Mid-Morning
Marissa Weather - 2026-09-20 - Morning - Light Fog
73°F 23°C
Light Fog
Mid-Afternoon
Marissa Weather - 2026-09-20 - Afternoon - Scattered Showers
76°F 25°C
Scattered Showers
Early-Evening
Marissa Weather - 2026-09-20 - Evening - Overcast
72°F 23°C
Overcast
Enjoyable around 76°F 25°C, scattered downpours possible, with steady humidity and steady pressure. Winds switching from the WNW to the ESE at 10 mph 15 km/h.

Monday, September 21, 2026

Mid-Morning
Marissa Weather - 2026-09-21 - Morning - Overcast
64°F 18°C
Overcast
Mid-Afternoon
Marissa Weather - 2026-09-21 - Afternoon - Light Showers
63°F 17°C
Light Showers
Early-Evening
Marissa Weather - 2026-09-21 - Evening - Scattered Showers
62°F 17°C
Scattered Showers
Refreshing around 63°F 17°C, locally heavy downpours at times, with steady humidity and steady pressure. Winds moving from the NNE to the NE at 12 mph 19 km/h. Gusts up to 22 mph 36 km/h.

Tuesday, September 22, 2026

Mid-Morning
Marissa Weather - 2026-09-22 - Morning - Light Showers
65°F 18°C
Light Showers
Mid-Afternoon
Marissa Weather - 2026-09-22 - Afternoon - Light Showers
68°F 20°C
Light Showers
Early-Evening
Marissa Weather - 2026-09-22 - Evening - Light Showers
67°F 20°C
Light Showers
Mild with a high of 68°F 20°C, rounds of showers expected off and on all day, with steady humidity and steady pressure. Winds swinging from the ENE to the N at 9 mph 14 km/h.

Wednesday, September 23, 2026

Mid-Morning
Marissa Weather - 2026-09-23 - Morning - Heavy Rain Showers
67°F 19°C
Heavy Rain Showers
Mid-Afternoon
Marissa Weather - 2026-09-23 - Afternoon - Light Showers
66°F 19°C
Light Showers
Early-Evening
Marissa Weather - 2026-09-23 - Evening - Light Fog
67°F 20°C
Light Fog
Comfortable at 66°F 19°C, showers lingering into the afternoon before clearing, with steady humidity and steady pressure. Winds shifting from the SSE to the ENE at 4 mph 7 km/h.

Thursday, September 24, 2026

Mid-Morning
Marissa Weather - 2026-09-24 - Morning - Fog
69°F 21°C
Fog
Mid-Afternoon
Marissa Weather - 2026-09-24 - Afternoon - Scattered Showers
77°F 25°C
Scattered Showers
Early-Evening
Marissa Weather - 2026-09-24 - Evening - Scattered Showers
75°F 24°C
Scattered Showers
Comfortable with temperatures reaching 77°F 25°C, locally heavy downpours at times, with steady humidity and steady pressure.

Friday, September 25, 2026

Mid-Morning
Marissa Weather - 2026-09-25 - Morning - Light Fog
74°F 23°C
Light Fog
Mid-Afternoon
Marissa Weather - 2026-09-25 - Afternoon - Sunny
83°F 28°C
Sunny
Early-Evening
Marissa Weather - 2026-09-25 - Evening - Sunny
79°F 26°C
Sunny
Quite warm around 83°F 28°C, partly cloudy in the morning, becoming sunny through the afternoon and evening, with steady humidity and steady pressure.

Saturday, September 26, 2026

Mid-Morning
Marissa Weather - 2026-09-26 - Morning - Light Fog
74°F 23°C
Light Fog
Mid-Afternoon
Marissa Weather - 2026-09-26 - Afternoon - Sunny
83°F 28°C
Sunny
Early-Evening
Marissa Weather - 2026-09-26 - Evening - Sunny
78°F 26°C
Sunny
Quite warm reaching 83°F 28°C, feeling like 86°F 30°C during peak afternoon, sunny throughout the day, with steady humidity and steady pressure.

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Weather by the Numbers

Sun, 13th
Marissa IL Weather - Sunday, Sep 13, 2026 - Overcast
Hi: 95°F 35°C
Lo: 65°F 19°C
Sunrise 06:39 AM
Sunset 07:10 PM
Wind S 4 mph6 km/h
Dew Point 58°F15°C
uv Index 7
Barometric Pressure 29.97 in1015 mb
POP 10% *
Humidity 36%
Mon, 14th
Marissa IL Weather - Monday, Sep 14, 2026 - Sunny
Hi: 89°F 32°C
Lo: 61°F 16°C
Sunrise 06:40 AM
Sunset 07:09 PM
Wind ESE 11 mph18 km/h
Dew Point 58°F15°C
uv Index 4
Barometric Pressure 30.12 in1020 mb
POP 1% *
Humidity 46%
Tue, 15th
Marissa IL Weather - Tuesday, Sep 15, 2026 - Sunny
Hi: 102°F 39°C
Lo: 75°F 24°C
Sunrise 06:41 AM
Sunset 07:07 PM
Wind SW 13 mph21 km/h
Dew Point 62°F17°C
uv Index 7
Barometric Pressure 30 in1016 mb
POP 0% *
Humidity 31%
Wed, 16th
Marissa IL Weather - Wednesday, Sep 16, 2026 - Overcast
Hi: 96°F 35°C
Lo: 73°F 23°C
Sunrise 06:42 AM
Sunset 07:05 PM
Wind N 7 mph12 km/h
Dew Point 68°F20°C
uv Index 7
Barometric Pressure 30.18 in1022 mb
POP 11% *
Humidity 50%
Thu, 17th
Marissa IL Weather - Thursday, Sep 17, 2026 - Cloudy
Hi: 98°F 37°C
Lo: 76°F 24°C
Sunrise 06:42 AM
Sunset 07:04 PM
Wind W 13 mph21 km/h
Dew Point 61°F16°C
uv Index 8
Barometric Pressure 30.06 in1018 mb
POP 6% *
Humidity 29%
Fri, 18th
Marissa IL Weather - Friday, Sep 18, 2026 - Overcast
Hi: 91°F 33°C
Lo: 71°F 22°C
Sunrise 06:43 AM
Sunset 07:02 PM
Wind NE 8 mph13 km/h
Dew Point 67°F20°C
uv Index 7
Barometric Pressure 30.06 in1018 mb
POP 4% *
Humidity 53%
Sat, 19th
Marissa IL Weather - Saturday, Sep 19, 2026 - Cloudy
Hi: 97°F 36°C
Lo: 72°F 22°C
Sunrise 06:44 AM
Sunset 07:01 PM
Wind SSW 7 mph11 km/h
Dew Point 68°F20°C
uv Index 7
Barometric Pressure 29.91 in1013 mb
POP 6% *
Humidity 54%
Sun, 20th
Marissa IL Weather - Sunday, Sep 20, 2026 - Patchy Rain Nearby
Hi: 76°F 25°C
Lo: 67°F 19°C
Sunrise 06:45 AM
Sunset 06:59 PM
Wind NW 9 mph14 km/h
Dew Point 69°F21°C
uv Index 5
Barometric Pressure 29.88 in1012 mb
POP 19% *
Humidity 80%
Mon, 21st
Marissa IL Weather - Monday, Sep 21, 2026 - Moderate Or Heavy Rain Shower
Hi: 66°F 19°C
Lo: 61°F 16°C
Sunrise 06:46 AM
Sunset 06:57 PM
Wind NE 10 mph16 km/h
Dew Point 62°F17°C
uv Index 4
Barometric Pressure 29.88 in1012 mb
POP 80% *
Humidity 97%
Tue, 22nd
Marissa IL Weather - Tuesday, Sep 22, 2026 - Light Rain Shower
Hi: 69°F 21°C
Lo: 62°F 17°C
Sunrise 06:47 AM
Sunset 06:56 PM
Wind NE 6 mph10 km/h
Dew Point 66°F19°C
uv Index 4
Barometric Pressure 29.8 in1009 mb
POP 48% *
Humidity 94%
Wed, 23rd
Marissa IL Weather - Wednesday, Sep 23, 2026 - Patchy Rain Nearby
Hi: 68°F 20°C
Lo: 64°F 18°C
Sunrise 06:48 AM
Sunset 06:54 PM
Wind ENE 9 mph15 km/h
Dew Point 66°F19°C
uv Index 4
Barometric Pressure 29.8 in1009 mb
POP 50% *
Humidity 97%
Thu, 24th
Marissa IL Weather - Thursday, Sep 24, 2026 - Patchy Rain Nearby
Hi: 78°F 26°C
Lo: 66°F 19°C
Sunrise 06:49 AM
Sunset 06:53 PM
Wind ESE 6 mph9 km/h
Dew Point 66°F19°C
uv Index 5
Barometric Pressure 29.91 in1013 mb
POP 18% *
Humidity 76%
Fri, 25th
Marissa IL Weather - Friday, Sep 25, 2026 - Sunny
Hi: 83°F 29°C
Lo: 70°F 21°C
Sunrise 06:49 AM
Sunset 06:51 PM
Wind SSW 5 mph8 km/h
Dew Point 67°F19°C
uv Index 7
Barometric Pressure 30.03 in1017 mb
POP 5% *
Humidity 65%
Sat, 26th
Marissa IL Weather - Saturday, Sep 26, 2026 - Sunny
Hi: 84°F 29°C
Lo: 70°F 21°C
Sunrise 06:50 AM
Sunset 06:49 PM
Wind SE 6 mph10 km/h
Dew Point 66°F19°C
uv Index 7
Barometric Pressure 30.09 in1019 mb
POP 4% *
Humidity 63%
* POP = Probability of Precipitation. Data for 12:00 PM.