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

Now · 4:28 PM

Chillicothe Weather & Hourly Forecast

United States · Illinois · 61523

73°F

Mostly cloudy

Feels like: 68°F

💧 Humidity 48% 🌡 Pressure 30.06 inHg 💨 Wind 11 mph 👁 Visibility 25.3 mi ☁ Clouds 91% ☀️ UV index 2.2 · Low 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Chillicothe

Today

5:00 PM

Mostly sunny

74° 💧 None 💨 10 mph H 49%30.03 inHg

8:00 PM

Clear night

72° 💧 None 💨 11 mph H 56%30.00 inHg

11:00 PM

Overcast night

72° 💧 None 💨 13 mph H 60%30.00 inHg

Tomorrow

2:00 AM

Mostly clear night

72° 💧 None 💨 13 mph H 63%29.97 inHg

5:00 AM

Mostly clear night

72° 💧 None 💨 12 mph H 71%29.97 inHg

8:00 AM

Sunny

74° 💧 0.004 in 💨 11 mph H 75%30.00 inHg

11:00 AM

Sunny

81° 💧 0.003 in 💨 10 mph H 71%30.03 inHg

2:00 PM

Strong thunderstorm

87° 💧 0.009 in 💨 8 mph H 63%30.00 inHg

5:00 PM

Light thunderstorms

79° 💧 0.165 in 💨 9 mph H 86%30.06 inHg

8:00 PM

Light thunderstorms

73° 💧 0.023 in 💨 3 mph H 97%30.09 inHg

11:00 PM

Overcast night

72° 💧 0.140 in 💨 6 mph H 99%30.15 inHg

Wednesday

2:00 AM

Thunderstorms

71° 💧 0.244 in 💨 8 mph H 99%30.18 inHg

5:00 AM

Overcast night

68° 💧 0.002 in 💨 8 mph H 98%30.18 inHg

8:00 AM

Overcast

70° 💧 0.001 in 💨 8 mph H 96%30.24 inHg

11:00 AM

Overcast

77° 💧 0.041 in 💨 7 mph H 83%30.24 inHg

2:00 PM

Mostly cloudy

82° 💧 0.001 in 💨 5 mph H 76%30.18 inHg

Today

5:00 PM

Mostly sunny

74° 💧 None 💨 10 mph H 49%30.03 inHg

6:00 PM

Partly cloudy

73° 💧 None 💨 9 mph H 55%30.00 inHg

7:00 PM

Mostly sunny

72° 💧 None 💨 10 mph H 57%30.00 inHg

8:00 PM

Clear night

72° 💧 None 💨 11 mph H 56%30.00 inHg

9:00 PM

Clear night

72° 💧 None 💨 11 mph H 58%30.00 inHg

10:00 PM

Clear night

72° 💧 None 💨 11 mph H 59%30.03 inHg

11:00 PM

Overcast night

72° 💧 None 💨 13 mph H 60%30.00 inHg

Tomorrow

12:00 AM

Overcast night

72° 💧 None 💨 12 mph H 61%30.00 inHg

1:00 AM

Mostly cloudy night

72° 💧 None 💨 14 mph H 62%29.97 inHg

2:00 AM

Mostly clear night

72° 💧 None 💨 13 mph H 63%29.97 inHg

3:00 AM

Partly cloudy night

72° 💧 None 💨 13 mph H 66%29.97 inHg

4:00 AM

Mostly clear night

72° 💧 None 💨 13 mph H 69%29.97 inHg

5:00 AM

Mostly clear night

72° 💧 None 💨 12 mph H 71%29.97 inHg

6:00 AM

Partly cloudy night

72° 💧 None 💨 13 mph H 73%29.97 inHg

7:00 AM

Partly cloudy

72° 💧 None 💨 12 mph H 74%29.97 inHg

8:00 AM

Sunny

74° 💧 None 💨 11 mph H 75%30.00 inHg

9:00 AM

Mostly sunny

76° 💧 0.002 in 💨 6 mph H 74%30.06 inHg

10:00 AM

Mostly sunny

78° 💧 0.002 in 💨 7 mph H 72%30.03 inHg

11:00 AM

Sunny

81° 💧 0.003 in 💨 10 mph H 71%30.03 inHg

12:00 PM

Sunny

84° 💧 0.000 in 💨 10 mph H 67%30.03 inHg

1:00 PM

Sunny

86° 💧 None 💨 9 mph H 64%30.00 inHg

2:00 PM

Strong thunderstorm

87° 💧 0.001 in 💨 8 mph H 63%30.00 inHg

3:00 PM

Light thunderstorms

87° 💧 0.003 in 💨 7 mph H 63%30.00 inHg

4:00 PM

Light thunderstorms

86° 💧 0.004 in 💨 6 mph H 64%30.00 inHg

5:00 PM

Light thunderstorms

79° 💧 0.076 in 💨 9 mph H 86%30.06 inHg

6:00 PM

Light thunderstorms

77° 💧 0.046 in 💨 2 mph H 95%30.06 inHg

7:00 PM

Light thunderstorms

75° 💧 0.042 in 💨 1 mph H 95%30.09 inHg

8:00 PM

Light thunderstorms

73° 💧 0.021 in 💨 3 mph H 97%30.09 inHg

9:00 PM

Mostly clear night

73° 💧 0.001 in 💨 3 mph H 98%30.09 inHg

10:00 PM

Partly cloudy night

73° 💧 0.001 in 💨 5 mph H 99%30.12 inHg

11:00 PM

Overcast night

72° 💧 None 💨 6 mph H 99%30.15 inHg

Wednesday

12:00 AM

Light thunderstorms

71° 💧 0.026 in 💨 6 mph H 99%30.15 inHg

1:00 AM

Thunderstorms

71° 💧 0.114 in 💨 6 mph H 99%30.15 inHg

2:00 AM

Thunderstorms

71° 💧 0.150 in 💨 8 mph H 99%30.18 inHg

3:00 AM

Light thunderstorms

70° 💧 0.058 in 💨 4 mph H 98%30.18 inHg

4:00 AM

Light rain

69° 💧 0.036 in 💨 7 mph H 99%30.18 inHg

5:00 AM

Overcast night

68° 💧 0.002 in 💨 8 mph H 98%30.18 inHg

6:00 AM

Overcast night

68° 💧 None 💨 7 mph H 98%30.21 inHg

7:00 AM

Overcast

69° 💧 None 💨 7 mph H 98%30.21 inHg

8:00 AM

Overcast

70° 💧 None 💨 8 mph H 96%30.24 inHg

9:00 AM

Overcast

72° 💧 None 💨 8 mph H 93%30.24 inHg

10:00 AM

Overcast

75° 💧 0.001 in 💨 7 mph H 87%30.24 inHg

11:00 AM

Overcast

77° 💧 0.002 in 💨 7 mph H 83%30.24 inHg

12:00 PM

Light rain

77° 💧 0.019 in 💨 4 mph H 85%30.24 inHg

1:00 PM

Light thunderstorms

78° 💧 0.020 in 💨 5 mph H 88%30.24 inHg

2:00 PM

Mostly cloudy

82° 💧 0.000 in 💨 5 mph H 76%30.18 inHg

3:00 PM

Mostly cloudy

84° 💧 0.000 in 💨 6 mph H 72%30.18 inHg

4:00 PM

Strong thunderstorm

85° 💧 0.001 in 💨 3 mph H 68%30.15 inHg

5:00 PM

Light thunderstorms

81° 💧 0.020 in 💨 2 mph H 84%30.15 inHg

6:00 PM

Overcast

79° 💧 0.001 in 💨 4 mph H 92%30.15 inHg

7:00 PM

Mostly cloudy

77° 💧 None 💨 6 mph H 92%30.12 inHg

8:00 PM

Mostly cloudy night

76° 💧 None 💨 6 mph H 93%30.15 inHg

9:00 PM

Mostly cloudy night

75° 💧 None 💨 6 mph H 94%30.18 inHg

10:00 PM

Mostly cloudy night

75° 💧 None 💨 5 mph H 94%30.15 inHg

11:00 PM

Clear night

75° 💧 None 💨 5 mph H 94%30.15 inHg

Thursday

12:00 AM

Clear night

75° 💧 None 💨 4 mph H 93%30.12 inHg

1:00 AM

Clear night

75° 💧 None 💨 4 mph H 91%30.12 inHg

2:00 AM

Clear night

75° 💧 None 💨 6 mph H 89%30.12 inHg

3:00 AM

Overcast night

75° 💧 None 💨 6 mph H 88%30.12 inHg

4:00 AM

Mostly cloudy night

75° 💧 None 💨 6 mph H 88%30.12 inHg

5:00 AM

Mostly cloudy night

75° 💧 None 💨 5 mph H 88%30.12 inHg

6:00 AM

Mostly cloudy night

73° 💧 None 💨 2 mph H 92%30.12 inHg

7:00 AM

Mostly cloudy

73° 💧 None 💨 5 mph H 91%30.15 inHg

10:00 AM

Mostly cloudy

80° 💧 None 💨 3 mph H 81%30.18 inHg

1:00 PM

Mostly cloudy

85° 💧 None 💨 5 mph H 72%30.15 inHg

4:00 PM

Mostly sunny

85° 💧 None 💨 6 mph H 69%30.12 inHg

7:00 PM

Mostly sunny

79° 💧 None 💨 6 mph H 83%30.12 inHg

10:00 PM

Mostly clear night

74° 💧 None 💨 9 mph H 90%30.18 inHg

Friday

1:00 AM

Overcast night

70° 💧 None 💨 8 mph H 87%30.21 inHg

4:00 AM

Overcast night

69° 💧 None 💨 7 mph H 82%30.21 inHg

7:00 AM

Overcast

69° 💧 None 💨 7 mph H 82%30.21 inHg

10:00 AM

Overcast

72° 💧 None 💨 7 mph H 81%30.21 inHg

1:00 PM

Overcast

77° 💧 None 💨 8 mph H 75%30.15 inHg

4:00 PM

Mostly cloudy

82° 💧 None 💨 8 mph H 66%30.06 inHg

7:00 PM

Light rain

73° 💧 None 💨 1 mph H 97%30.06 inHg

10:00 PM

Partly cloudy night

71° 💧 None 💨 7 mph H 96%30.06 inHg

Saturday

1:00 AM

Partly cloudy night

70° 💧 None 💨 9 mph H 93%30.00 inHg

4:00 AM

Mostly clear night

70° 💧 None 💨 7 mph H 94%29.97 inHg

7:00 AM

Partly cloudy

72° 💧 None 💨 9 mph H 97%29.94 inHg

10:00 AM

Mostly cloudy

80° 💧 None 💨 10 mph H 82%29.91 inHg

1:00 PM

Mostly sunny

87° 💧 None 💨 8 mph H 64%29.85 inHg

4:00 PM

Partly cloudy

86° 💧 None 💨 9 mph H 63%29.83 inHg

7:00 PM

Mostly cloudy

80° 💧 None 💨 6 mph H 74%29.80 inHg

10:00 PM

Mostly cloudy night

77° 💧 None 💨 5 mph H 80%29.83 inHg

Sunday

1:00 AM

Light rain

72° 💧 None 💨 3 mph H 98%29.85 inHg

4:00 AM

Moderate rain

71° 💧 None 💨 6 mph H 99%29.85 inHg

7:00 AM

Light rain

71° 💧 None 💨 7 mph H 98%29.85 inHg

1:00 PM

Overcast

75° 💧 None 💨 7 mph H 73%29.91 inHg

7:00 PM

Partly cloudy night

72° 💧 None 💨 7 mph H 74%29.94 inHg

Monday

1:00 AM

Overcast night

66° 💧 None 💨 8 mph H 91%30.00 inHg

7:00 AM

Overcast

60° 💧 None 💨 8 mph H 90%30.03 inHg

1:00 PM

Overcast

68° 💧 None 💨 11 mph H 73%30.09 inHg

7:00 PM

Mostly cloudy night

65° 💧 None 💨 11 mph H 62%30.09 inHg

Tuesday

1:00 AM

Overcast night

59° 💧 None 💨 10 mph H 81%30.15 inHg

7:00 AM

Overcast

57° 💧 None 💨 10 mph H 77%30.21 inHg

1:00 PM

Overcast

68° 💧 None 💨 11 mph H 58%30.24 inHg

7:00 PM

Overcast night

63° 💧 None 💨 12 mph H 60%30.21 inHg

Wednesday

1:00 AM

Overcast night

61° 💧 None 💨 10 mph H 73%30.27 inHg

7:00 AM

Mostly cloudy

56° 💧 None 💨 9 mph H 77%30.30 inHg

1:00 PM

Overcast

69° 💧 None 💨 10 mph H 61%30.27 inHg

7:00 PM

Clear night

66° 💧 None 💨 10 mph H 69%30.24 inHg

Thursday

1:00 AM

Overcast night

63° 💧 None 💨 6 mph H 70%30.27 inHg

7:00 AM

Overcast

63° 💧 None 💨 6 mph H 75%30.27 inHg

1:00 PM

Overcast

73° 💧 None 💨 4 mph H 66%30.27 inHg

7:00 PM

Mostly cloudy night

70° 💧 None 💨 3 mph H 78%30.21 inHg

Friday

1:00 AM

Overcast night

68° 💧 None 💨 3 mph H 82%30.24 inHg

7:00 AM

Overcast

67° 💧 None 💨 3 mph H 87%30.27 inHg

1:00 PM

Partly cloudy

77° 💧 None 💨 4 mph H 65%30.24 inHg

7:00 PM

Overcast night

73° 💧 None 💨 2 mph H 79%30.18 inHg

Saturday

1:00 AM

Partly cloudy night

65° 💧 None 💨 3 mph H 87%30.18 inHg

7:00 AM

Overcast

64° 💧 None 💨 2 mph H 90%30.21 inHg

1:00 PM

Mostly sunny

78° 💧 None 💨 4 mph H 58%30.15 inHg

7:00 PM

Overcast night

71° 💧 None 💨 3 mph H 74%30.06 inHg

Sunday

1:00 AM

Partly cloudy night

64° 💧 None 💨 4 mph H 80%30.03 inHg

7:00 AM

Mostly sunny

63° 💧 None 💨 4 mph H 88%30.00 inHg

1:00 PM

Sunny

77° 💧 None 💨 8 mph H 59%29.94 inHg

7:00 PM

Mostly clear night

74° 💧 None 💨 8 mph H 65%29.85 inHg

Monday

1:00 AM

Clear night

71° 💧 None 💨 9 mph H 62%29.83 inHg

7:00 AM

Partly cloudy

65° 💧 None 💨 7 mph H 87%29.85 inHg

1:00 PM

Mostly sunny

82° 💧 None 💨 6 mph H 62%29.85 inHg

7:00 PM

Clear night

74° 💧 None 💨 4 mph H 79%29.85 inHg

Tuesday

1:00 AM

Clear night

66° 💧 None 💨 1 mph H 94%29.91 inHg

7:00 AM

Mostly sunny

63° 💧 None 💨 2 mph H 98%29.97 inHg

In Chillicothe and, more broadly, across the state of Illinois: The late afternoon will feature a mix of sun and clouds, with temperatures remaining mild to warm between 69 and 77 degrees Fahrenheit. Winds will be from the southeast at around 14 mph, with gusts reaching up to 35 mph. As evening approaches, skies will remain partly cloudy, and no precipitation is expected. Winds may slightly diminish but will continue to be moderate, providing a gentle breeze as temperatures gradually cool. Overall, conditions are expected to stay dry and comfortable through the evening hours.

15-Day Weather Outlook for Chillicothe

TomorrowTomorrow

Strong thunderstorm 87°/72° 💧 None 💨 14 mph

Wednesday, Sep 16Wed Sep 16

Light thunderstorms 85°/68° 💧 None 💨 8 mph

Thursday, Sep 17Thu Sep 17

Mostly sunny 85°/73° 💧 0.713 in 💨 9 mph

Friday, Sep 18Fri Sep 18

Light rain 82°/69° 💧 0.256 in 💨 8 mph

Saturday, Sep 19Sat Sep 19

Partly cloudy 87°/70° 💧 0.013 in 💨 10 mph

Sunday, Sep 20Sun Sep 20

Moderate rain 75°/71° 💧 1.010 in 💨 7 mph

Monday, Sep 21Mon Sep 21

Overcast 68°/60° 💧 0.008 in 💨 11 mph

Tuesday, Sep 22Tue Sep 22

Overcast 68°/57° 💧 None 💨 12 mph

Wednesday, Sep 23Wed Sep 23

Overcast 69°/56° 💧 None 💨 10 mph

Thursday, Sep 24Thu Sep 24

Overcast 73°/63° 💧 None 💨 6 mph

Friday, Sep 25Fri Sep 25

Partly cloudy 77°/67° 💧 0.020 in 💨 4 mph

Saturday, Sep 26Sat Sep 26

Partly cloudy 78°/64° 💧 None 💨 4 mph

Sunday, Sep 27Sun Sep 27

Partly cloudy 77°/63° 💧 0.011 in 💨 8 mph

Monday, Sep 28Mon Sep 28

Partly cloudy 82°/65° 💧 0.029 in 💨 9 mph

Tuesday, Sep 29Tue Sep 29

Mostly sunny 66°/63° 💧 None 💨 2 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Chillicothe

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Chillicothe

Hourly forecast · Updated every 2 hours

Moderate

Nearest forecast value 5:00 PM

PM2.5 Fine particles Good 4,9µg/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 5,2µg/m³

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

O₃ Ozone Moderate 106,2µg/m³

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

NO₂ Nitrogen dioxide Good 1,4µg/m³

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

Sensitive people should reduce strenuous and prolonged outdoor exertion.

UV & HEALTH

UV, Sun & Health Outlook in Chillicothe

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 4,2Moderate 😐Moderate

Tomorrow UV 5,9Moderate 🙂Fair

Wednesday UV 4,0Moderate 🙂Fair

Thursday UV 5,0Moderate 🙂Fair

Friday UV 7,0High 😐Moderate

Saturday UV 7,0High —Unavailable

Sunday UV 4,0Moderate —Unavailable

Hourly UV index today

5:00 PMUV 1,3 6:00 PMUV 0,4 7:00 PMUV 0,0

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

Moderate UV risk

Sunglasses and sun protection are recommended for prolonged exposure.

Caution for sensitive people

People with respiratory or cardiovascular conditions should reduce prolonged outdoor exertion.

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 Chillicothe

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · CHILLICOTHE, ILLINOIS

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 9:00 PM–10:00 PM.

100/100Best-hour score

BEST TIME TONIGHT 9:00 PM–10:00 PM Astronomical darkness: 8:42 PM–5:05 AM

☁ Cloud cover 0% Real hourly forecast for the best viewing hour.

☾ Moonlight 11% Waxing Crescent · Moon below the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 11° high at the best hour.

✦ Estimated visible meteors 0–1/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min27%

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 Chillicothe were last refreshed today at 4:28 PM. The current forecast period extends through 16/09/2026 at 2:00 PM. 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.