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Current weather in Marietta is clear sky.

Where can I find the hourly weather forecast for Marietta?

This page shows hourly weather forecast for Marietta, including temperature, wind, precipitation, humidity and cloud cover.

Is the weather forecast for Marietta updated regularly?

Weather data for Marietta is updated regularly with the latest available observations and forecasts.

Now · 7:09 AM

Marietta Weather & Hourly Forecast

United States · Illinois · 61459

65°F

Sunny

Feels like: 65°F

💧 Humidity 80% 🌡 Pressure 30.09 inHg 💨 Wind 7 mph 👁 Visibility 18.5 mi ☁ Clouds 1% ☀️ UV index 0.0 · Low 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Marietta

Today

8:00 AM

Sunny

69° 💧 None 💨 7 mph H 77%30.09 inHg

11:00 AM

Mostly cloudy

81° 💧 None 💨 8 mph H 53%30.09 inHg

2:00 PM

Partly cloudy

88° 💧 None 💨 9 mph H 43%30.03 inHg

5:00 PM

Mostly sunny

89° 💧 None 💨 9 mph H 44%30.00 inHg

8:00 PM

Clear night

81° 💧 None 💨 7 mph H 61%30.00 inHg

11:00 PM

Clear night

79° 💧 None 💨 10 mph H 61%30.00 inHg

Tomorrow

2:00 AM

Clear night

78° 💧 None 💨 9 mph H 58%30.00 inHg

5:00 AM

Clear night

77° 💧 0.001 in 💨 10 mph H 59%29.97 inHg

8:00 AM

Mostly sunny

77° 💧 0.014 in 💨 3 mph H 69%30.03 inHg

11:00 AM

Partly cloudy

84° 💧 0.008 in 💨 2 mph H 59%30.03 inHg

2:00 PM

Mostly cloudy

90° 💧 0.000 in 💨 8 mph H 50%29.97 inHg

5:00 PM

Light rain

83° 💧 0.072 in 💨 6 mph H 74%29.94 inHg

8:00 PM

Light thunderstorms

75° 💧 0.077 in 💨 1 mph H 97%29.97 inHg

11:00 PM

Light thunderstorms

72° 💧 0.113 in 💨 6 mph H 99%30.00 inHg

Thursday

2:00 AM

Light thunderstorms

70° 💧 0.225 in 💨 6 mph H 99%29.97 inHg

5:00 AM

Overcast night

69° 💧 0.001 in 💨 5 mph H 98%29.97 inHg

Today

8:00 AM

Sunny

69° 💧 None 💨 7 mph H 77%30.09 inHg

9:00 AM

Mostly cloudy

73° 💧 None 💨 7 mph H 68%30.09 inHg

10:00 AM

Overcast

77° 💧 None 💨 7 mph H 60%30.09 inHg

11:00 AM

Mostly cloudy

81° 💧 None 💨 8 mph H 53%30.09 inHg

12:00 PM

Mostly sunny

84° 💧 None 💨 8 mph H 48%30.09 inHg

1:00 PM

Partly cloudy

86° 💧 None 💨 9 mph H 45%30.06 inHg

2:00 PM

Partly cloudy

88° 💧 None 💨 9 mph H 43%30.03 inHg

3:00 PM

Mostly sunny

89° 💧 None 💨 9 mph H 42%30.03 inHg

4:00 PM

Mostly sunny

89° 💧 None 💨 10 mph H 42%30.00 inHg

5:00 PM

Mostly sunny

89° 💧 None 💨 9 mph H 44%30.00 inHg

6:00 PM

Sunny

87° 💧 None 💨 8 mph H 49%30.00 inHg

7:00 PM

Sunny

84° 💧 None 💨 7 mph H 57%29.97 inHg

8:00 PM

Clear night

81° 💧 None 💨 7 mph H 61%30.00 inHg

9:00 PM

Clear night

80° 💧 None 💨 8 mph H 62%30.03 inHg

10:00 PM

Clear night

79° 💧 None 💨 8 mph H 61%30.03 inHg

11:00 PM

Clear night

79° 💧 None 💨 10 mph H 61%30.00 inHg

Tomorrow

12:00 AM

Clear night

79° 💧 None 💨 10 mph H 61%30.00 inHg

1:00 AM

Clear night

79° 💧 None 💨 10 mph H 59%30.00 inHg

2:00 AM

Clear night

78° 💧 None 💨 9 mph H 58%30.00 inHg

3:00 AM

Clear night

78° 💧 None 💨 9 mph H 58%29.97 inHg

4:00 AM

Clear night

77° 💧 None 💨 10 mph H 58%29.97 inHg

5:00 AM

Clear night

77° 💧 None 💨 10 mph H 59%29.97 inHg

6:00 AM

Clear night

77° 💧 None 💨 10 mph H 60%29.97 inHg

7:00 AM

Mostly sunny

75° 💧 0.001 in 💨 4 mph H 69%30.03 inHg

8:00 AM

Mostly sunny

77° 💧 0.001 in 💨 3 mph H 69%30.03 inHg

9:00 AM

Light rain

80° 💧 0.010 in 💨 3 mph H 66%30.06 inHg

10:00 AM

Light rain

82° 💧 0.004 in 💨 1 mph H 62%30.03 inHg

11:00 AM

Partly cloudy

84° 💧 0.003 in 💨 2 mph H 59%30.03 inHg

12:00 PM

Light rain

86° 💧 0.004 in 💨 4 mph H 56%30.03 inHg

1:00 PM

Sunny

87° 💧 None 💨 6 mph H 54%30.00 inHg

2:00 PM

Mostly cloudy

90° 💧 0.000 in 💨 8 mph H 50%29.97 inHg

3:00 PM

Mostly cloudy

89° 💧 None 💨 7 mph H 52%29.97 inHg

4:00 PM

Strong thunderstorm

88° 💧 0.000 in 💨 7 mph H 56%29.97 inHg

5:00 PM

Light rain

83° 💧 0.021 in 💨 6 mph H 74%29.94 inHg

6:00 PM

Light rain

79° 💧 0.027 in 💨 7 mph H 89%29.97 inHg

7:00 PM

Light rain

77° 💧 0.025 in 💨 5 mph H 96%29.97 inHg

8:00 PM

Light thunderstorms

75° 💧 0.006 in 💨 1 mph H 97%29.97 inHg

9:00 PM

Light thunderstorms

75° 💧 0.036 in 💨 3 mph H 98%29.97 inHg

10:00 PM

Light rain

74° 💧 0.034 in 💨 1 mph H 98%29.97 inHg

11:00 PM

Light thunderstorms

72° 💧 0.080 in 💨 6 mph H 99%30.00 inHg

Thursday

12:00 AM

Light thunderstorms

72° 💧 0.029 in 💨 5 mph H 98%29.97 inHg

1:00 AM

Light rain

72° 💧 0.004 in 💨 2 mph H 98%29.97 inHg

2:00 AM

Light thunderstorms

70° 💧 0.054 in 💨 6 mph H 99%29.97 inHg

3:00 AM

Thunderstorms

70° 💧 0.118 in 💨 6 mph H 99%29.97 inHg

4:00 AM

Light rain

69° 💧 0.053 in 💨 5 mph H 99%29.97 inHg

5:00 AM

Overcast night

69° 💧 0.001 in 💨 5 mph H 98%29.97 inHg

6:00 AM

Overcast night

70° 💧 None 💨 3 mph H 98%29.97 inHg

7:00 AM

Overcast

70° 💧 None 💨 4 mph H 99%29.97 inHg

8:00 AM

Overcast

71° 💧 None 💨 6 mph H 98%29.97 inHg

9:00 AM

Mostly cloudy

71° 💧 None 💨 8 mph H 93%30.00 inHg

10:00 AM

Mostly cloudy

74° 💧 None 💨 7 mph H 82%30.00 inHg

11:00 AM

Overcast

77° 💧 None 💨 7 mph H 70%30.00 inHg

12:00 PM

Mostly cloudy

79° 💧 None 💨 8 mph H 60%30.00 inHg

1:00 PM

Mostly cloudy

80° 💧 None 💨 8 mph H 52%30.00 inHg

2:00 PM

Sunny

81° 💧 None 💨 7 mph H 48%29.97 inHg

3:00 PM

Sunny

81° 💧 None 💨 8 mph H 47%29.97 inHg

4:00 PM

Sunny

81° 💧 None 💨 8 mph H 46%29.94 inHg

5:00 PM

Sunny

79° 💧 None 💨 9 mph H 46%29.94 inHg

6:00 PM

Sunny

77° 💧 None 💨 7 mph H 52%29.94 inHg

7:00 PM

Sunny

72° 💧 None 💨 6 mph H 60%29.94 inHg

10:00 PM

Clear night

65° 💧 None 💨 4 mph H 74%30.00 inHg

Friday

1:00 AM

Clear night

62° 💧 None 💨 4 mph H 86%30.00 inHg

4:00 AM

Clear night

60° 💧 None 💨 4 mph H 90%30.00 inHg

7:00 AM

Sunny

59° 💧 None 💨 3 mph H 94%30.03 inHg

10:00 AM

Sunny

71° 💧 None 💨 5 mph H 76%30.00 inHg

1:00 PM

Sunny

79° 💧 None 💨 7 mph H 53%29.94 inHg

4:00 PM

Sunny

81° 💧 None 💨 7 mph H 50%29.88 inHg

7:00 PM

Sunny

75° 💧 None 💨 4 mph H 71%29.85 inHg

10:00 PM

Mostly clear night

69° 💧 None 💨 5 mph H 86%29.85 inHg

Saturday

1:00 AM

Partly cloudy night

69° 💧 None 💨 8 mph H 80%29.85 inHg

4:00 AM

Clear night

68° 💧 None 💨 9 mph H 84%29.83 inHg

7:00 AM

Partly cloudy

69° 💧 None 💨 8 mph H 93%29.83 inHg

10:00 AM

Overcast

76° 💧 None 💨 6 mph H 82%29.88 inHg

1:00 PM

Overcast

82° 💧 None 💨 8 mph H 70%29.83 inHg

4:00 PM

Overcast

83° 💧 None 💨 9 mph H 65%29.85 inHg

7:00 PM

Partly cloudy

79° 💧 None 💨 3 mph H 78%29.85 inHg

10:00 PM

Light rain

76° 💧 None 💨 7 mph H 87%29.91 inHg

Sunday

1:00 AM

Overcast night

72° 💧 None 💨 5 mph H 95%29.97 inHg

4:00 AM

Mostly clear night

69° 💧 None 💨 9 mph H 79%30.00 inHg

7:00 AM

Mostly cloudy

63° 💧 None 💨 7 mph H 82%30.06 inHg

10:00 AM

Partly cloudy

70° 💧 None 💨 8 mph H 61%30.09 inHg

1:00 PM

Mostly cloudy

78° 💧 None 💨 6 mph H 45%30.06 inHg

4:00 PM

Sunny

80° 💧 None 💨 6 mph H 42%30.03 inHg

7:00 PM

Mostly sunny

73° 💧 None 💨 4 mph H 59%30.03 inHg

Monday

1:00 AM

Mostly cloudy night

68° 💧 None 💨 6 mph H 67%30.06 inHg

7:00 AM

Mostly cloudy

66° 💧 None 💨 9 mph H 70%30.06 inHg

1:00 PM

Overcast

87° 💧 None 💨 10 mph H 63%29.94 inHg

7:00 PM

Sunny

86° 💧 None 💨 12 mph H 64%29.80 inHg

Tuesday

1:00 AM

Light rain

74° 💧 None 💨 4 mph H 95%29.94 inHg

7:00 AM

Overcast

70° 💧 None 💨 11 mph H 92%30.03 inHg

1:00 PM

Mostly cloudy

77° 💧 None 💨 5 mph H 52%30.12 inHg

7:00 PM

Overcast

72° 💧 None 💨 3 mph H 59%30.15 inHg

Wednesday

1:00 AM

Light rain

65° 💧 None 💨 5 mph H 86%30.21 inHg

7:00 AM

Moderate rain

63° 💧 None 💨 6 mph H 92%30.27 inHg

1:00 PM

Light thunderstorms

71° 💧 None 💨 5 mph H 80%30.27 inHg

7:00 PM

Moderate rain

69° 💧 None 💨 7 mph H 93%30.21 inHg

Thursday

1:00 AM

Light rain

66° 💧 None 💨 6 mph H 92%30.18 inHg

7:00 AM

Mostly cloudy

65° 💧 None 💨 5 mph H 97%30.18 inHg

1:00 PM

Light rain

72° 💧 None 💨 9 mph H 89%30.18 inHg

7:00 PM

Mostly sunny

70° 💧 None 💨 11 mph H 77%30.24 inHg

Friday

1:00 AM

Clear night

61° 💧 None 💨 10 mph H 83%30.36 inHg

7:00 AM

Sunny

55° 💧 None 💨 10 mph H 82%30.47 inHg

1:00 PM

Sunny

64° 💧 None 💨 9 mph H 56%30.47 inHg

7:00 PM

Sunny

60° 💧 None 💨 5 mph H 68%30.39 inHg

Saturday

1:00 AM

Clear night

52° 💧 None 💨 4 mph H 85%30.39 inHg

7:00 AM

Mostly cloudy

48° 💧 None 💨 3 mph H 93%30.36 inHg

1:00 PM

Sunny

65° 💧 None 💨 6 mph H 49%30.30 inHg

7:00 PM

Sunny

60° 💧 None 💨 4 mph H 70%30.15 inHg

Sunday

1:00 AM

Clear night

55° 💧 None 💨 7 mph H 79%30.12 inHg

7:00 AM

Sunny

51° 💧 None 💨 6 mph H 82%30.12 inHg

1:00 PM

Sunny

73° 💧 None 💨 8 mph H 48%30.06 inHg

7:00 PM

Mostly sunny

68° 💧 None 💨 7 mph H 62%30.00 inHg

Monday

1:00 AM

Overcast night

66° 💧 None 💨 7 mph H 59%30.03 inHg

7:00 AM

Overcast

65° 💧 None 💨 4 mph H 66%30.06 inHg

1:00 PM

Partly cloudy

78° 💧 None 💨 7 mph H 55%30.06 inHg

7:00 PM

Overcast

71° 💧 None 💨 6 mph H 61%30.06 inHg

Tuesday

1:00 AM

Mostly clear night

63° 💧 None 💨 6 mph H 74%30.12 inHg

7:00 AM

Sunny

57° 💧 None 💨 5 mph H 88%30.15 inHg

1:00 PM

Sunny

73° 💧 None 💨 6 mph H 46%30.12 inHg

7:00 PM

Sunny

67° 💧 None 💨 4 mph H 70%30.03 inHg

In Marietta and, more broadly, across the state of Illinois: This morning, the sky will be mostly cloudy with warm temperatures ranging from 60 to 90 degrees Fahrenheit. Winds will be light, coming from the south at around 9 mph, with occasional gusts up to 17 mph. As the day progresses into the afternoon, conditions will remain mostly cloudy, but temperatures are expected to stay steady within the same range. No precipitation is forecasted, so outdoor plans can proceed without concern for rain. Winds will continue to be gentle, maintaining a southward flow with similar speeds. Overall, it will be a warm and partly cloudy day with calm winds and no threat of rain.

15-Day Weather Outlook for Marietta

TomorrowTomorrow

Strong thunderstorm 90°/75° 💧 None 💨 10 mph

Thursday, Sep 10Thu Sep 10

Light thunderstorms 81°/69° 💧 None 💨 9 mph

Friday, Sep 11Fri Sep 11

Sunny 81°/58° 💧 None 💨 7 mph

Saturday, Sep 12Sat Sep 12

Mostly cloudy 88°/68° 💧 0.002 in 💨 8 mph

Sunday, Sep 13Sun Sep 13

Light rain 83°/68° 💧 0.086 in 💨 7 mph

Monday, Sep 14Mon Sep 14

Partly cloudy 88°/74° 💧 0.001 in 💨 9 mph

Tuesday, Sep 15Tue Sep 15

Moderate rain 90°/64° 💧 0.412 in 💨 13 mph

Wednesday, Sep 16Wed Sep 16

Sunny 75°/56° 💧 None 💨 10 mph

Thursday, Sep 17Thu Sep 17

Sunny 73°/57° 💧 None 💨 6 mph

Friday, Sep 18Fri Sep 18

Mostly sunny 78°/63° 💧 None 💨 9 mph

Saturday, Sep 19Sat Sep 19

Moderate rain 79°/67° 💧 0.423 in 💨 5 mph

Sunday, Sep 20Sun Sep 20

Overcast 74°/62° 💧 0.443 in 💨 7 mph

Monday, Sep 21Mon Sep 21

Partly cloudy 76°/60° 💧 0.001 in 💨 6 mph

Tuesday, Sep 22Tue Sep 22

Light rain 69°/65° 💧 0.503 in 💨 11 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Marietta

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Marietta

Hourly forecast · Updated every 2 hours

Good

Nearest forecast value 8:00 AM

PM2.5 Fine particles Good 7,9µg/m³

Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.

PM10 Particulate matter Good 8,7µg/m³

Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.

O₃ Ozone Good 43,9µg/m³

Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.

NO₂ Nitrogen dioxide Good 6,3µg/m³

A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.

Air quality is favorable for outdoor activities.

UV & HEALTH

UV, Sun & Health Outlook in Marietta

Maximum daily UV Today, tomorrow and the following day show the maximum UV index forecast for each day.

0–2 Low 3–5 Moderate 6–7 High 8–10 Very high 11+ Extreme

Today UV 7,5High 😊Good

Tomorrow UV 7,5High 🙂Fair

Thursday UV 5,7Moderate 🙂Fair

Friday UV 6,7High 🙂Fair

Saturday UV 8,0Very high 😊Good

Sunday UV 9,0Very high —Unavailable

Monday UV 8,0Very high —Unavailable

Hourly UV index today

8:00 AMUV 0,5 9:00 AMUV 1,5 10:00 AMUV 3,3 11:00 AMUV 5,2 12:00 PMUV 7,1 1:00 PMUV 7,5 2:00 PMUV 7,1 3:00 PMUV 5,6 4:00 PMUV 3,5 5:00 PMUV 1,7 6:00 PMUV 0,5 7:00 PMUV 0,0

Today's weather health advice Open today's recommendations.

Strong UV exposure

Protect exposed skin with SPF 30+ sunscreen, wear sunglasses, and try to limit direct midday sun.

Good air quality

Air quality is good and outdoor activities can be enjoyed normally.

Comfortable temperature conditions

Temperatures should feel comfortable for most people, with no particular heat or cold precautions needed.

Good conditions for outdoor activities

Outdoor activities can generally be enjoyed normally, with sun protection adjusted to the UV level.

WIND OUTLOOK

Hourly Wind Forecast for Marietta

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · MARIETTA, ILLINOIS

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 4:00 AM–5:00 AM.

99/100Best-hour score

BEST TIME TONIGHT 4:00 AM–5:00 AM Astronomical darkness: 8:56 PM–5:02 AM

☁ Cloud cover 1% Real hourly forecast for the best viewing hour.

☾ Moonlight 7% Waning Crescent · Moon below the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 79° high at the best hour.

✦ Estimated visible meteors 2–5/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min80%

UPCOMING METEOR PERIODSStart, peak and end dates · weather should be checked closer to the peak.

SEP 5–SEP 21

September ε-PerseidsStart SEP 5 · Peak SEP 9 · End SEP 21 · ZHR 8 · 6% Moon at peak

ACTIVE NOW

SEP 20–NOV 20

Southern TauridsStart SEP 20 · Peak NOV 5 · End NOV 20 · ZHR 7 · 20% Moon at peak

UPCOMING

OCT 2–NOV 7

OrionidsStart OCT 2 · Peak OCT 21 · End NOV 7 · ZHR 20 · 77% Moon at peak

UPCOMING

OCT 20–DEC 10

Northern TauridsStart OCT 20 · Peak NOV 12 · End DEC 10 · ZHR 5 · 7% Moon at peak

UPCOMING

Experimental local observing estimate. Weather values come from the hourly forecast already used on this page. Moon position and astronomical darkness are calculated locally from time and coordinates. Meteor-shower ZHR describes ideal conditions and is not the number of meteors a person should expect to see locally.

DISCOVER WEATHER NEARBY Weather in other cities

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Forecast data for Marietta were last refreshed today at 7:09 AM. The current forecast period extends through 10/09/2026 at 5:00 AM. Weather, air-quality and UV-index data are provided through WEATHER-INFO.COM. Forecasts are produced automatically from the latest available data and are subject to periodic technical checks. This service is intended for general weather information.