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Chatham IL Weather - Mostly Cloudy - 82°F
Mostly Cloudy
82°F
Updated 2:23 pm
Feels Like 82°F
Humidity 43%
Wind WSW 3 mph
Barometer  30.11 in
Dew Point 58°F
Chatham IL Weather - Mostly Cloudy - 28°C
Mostly Cloudy
28°C
Updated 2:23 pm
Feels Like 28°C
Humidity 43%
Wind WSW 5 km/h
Barometer  101.9 kPa
Dew Point 14°C
Chatham, IL Weather and Current Conditionschatham il weather forecast

Chatham, IL Weather Forecast

Chatham Illinois WeatherChatham, Illinois Weather Weather Forecast
14 day API forecast for Chatham, Illinois. Note. The 7-day weather forecast for Chatham, IL is the most reliable and accurate forecast. This model should only be used as a likely scenario. It is difficult to predict weather more than 7 days in advance.
Chatham, IL Weather Forecast Dated: 223 PM Tue Sep 08 2026
Expect a mild stretch with a mix of sun and clouds and frequent chances of rain over the coming period. moderate humidity and no major pressure swings will dominate.

Tuesday, September 8, 2026

Mid-Morning
Chatham Weather - 2026-09-08 - Morning - Overcast
69°F 21°C
Overcast
Mid-Afternoon
Chatham Weather - 2026-09-08 - Afternoon - Overcast
87°F 30°C
Overcast
Early-Evening
Chatham Weather - 2026-09-08 - Evening - Overcast
79°F 26°C
Overcast
Warm and summery near 87°F 30°C, overcast through the afternoon, turning cloudy this evening, with steady humidity and barometric pressure falling.

Wednesday, September 9, 2026

Mid-Morning
Chatham Weather - 2026-09-09 - Morning - Light Rain
72°F 22°C
Light Rain
Mid-Afternoon
Chatham Weather - 2026-09-09 - Afternoon - Partly Cloudy
72°F 22°C
Partly Cloudy
Early-Evening
Chatham Weather - 2026-09-09 - Evening - Overcast
75°F 24°C
Overcast
Comfortable with temperatures reaching 72°F 22°C, scattered morning showers before drying out later, with steady humidity and steady pressure.

Thursday, September 10, 2026

Mid-Morning
Chatham Weather - 2026-09-10 - Morning - Overcast
71°F 22°C
Overcast
Mid-Afternoon
Chatham Weather - 2026-09-10 - Afternoon - Sunny
76°F 24°C
Sunny
Early-Evening
Chatham Weather - 2026-09-10 - Evening - Sunny
69°F 21°C
Sunny
Enjoyable around 76°F 24°C, overcast in the morning, becoming sunny through the afternoon and evening, with steady humidity and steady pressure. Winds turning from the NE to the ENE at 6 mph 10 km/h.

Friday, September 11, 2026

Mid-Morning
Chatham Weather - 2026-09-11 - Morning - Sunny
66°F 19°C
Sunny
Mid-Afternoon
Chatham Weather - 2026-09-11 - Afternoon - Sunny
83°F 28°C
Sunny
Early-Evening
Chatham Weather - 2026-09-11 - Evening - Sunny
76°F 25°C
Sunny
Warm temperatures up to 83°F 28°C, sunny throughout the day, with increasing humidity and steady pressure.

Saturday, September 12, 2026

Mid-Morning
Chatham Weather - 2026-09-12 - Morning - Overcast
73°F 23°C
Overcast
Mid-Afternoon
Chatham Weather - 2026-09-12 - Afternoon - Overcast
85°F 29°C
Overcast
Early-Evening
Chatham Weather - 2026-09-12 - Evening - Light Showers
72°F 22°C
Light Showers
Very warm with a high of 85°F 29°C, mainly dry until evening showers arrive, with increasing humidity and steady pressure. Winds switching from the WSW to the S at 4 mph 7 km/h.

Sunday, September 13, 2026

Mid-Morning
Chatham Weather - 2026-09-13 - Morning - Light Fog
72°F 22°C
Light Fog
Mid-Afternoon
Chatham Weather - 2026-09-13 - Afternoon - Overcast
78°F 26°C
Overcast
Early-Evening
Chatham Weather - 2026-09-13 - Evening - Overcast
77°F 25°C
Overcast
Pleasant near 78°F 26°C, overcast throughout the day, with lower humidity and steady pressure.

Monday, September 14, 2026

Mid-Morning
Chatham Weather - 2026-09-14 - Morning - Overcast
69°F 21°C
Overcast
Mid-Afternoon
Chatham Weather - 2026-09-14 - Afternoon - Overcast
76°F 25°C
Overcast
Early-Evening
Chatham Weather - 2026-09-14 - Evening - Sunny
78°F 26°C
Sunny
Comfortable with temperatures reaching 76°F 25°C, overcast in the morning, becoming partly cloudy through the afternoon and evening, with lower humidity and barometric pressure falling.

Tuesday, September 15, 2026

Mid-Morning
Chatham Weather - 2026-09-15 - Morning - Overcast
69°F 21°C
Overcast
Mid-Afternoon
Chatham Weather - 2026-09-15 - Afternoon - Scattered Showers
75°F 24°C
Scattered Showers
Early-Evening
Chatham Weather - 2026-09-15 - Evening - Partly Cloudy
69°F 20°C
Partly Cloudy
Enjoyable around 75°F 24°C, scattered downpours possible, with lower humidity and barometric pressure rising. Winds moving from the W to the NNW at 7 mph 11 km/h.

Wednesday, September 16, 2026

Mid-Morning
Chatham Weather - 2026-09-16 - Morning - Sunny
66°F 19°C
Sunny
Mid-Afternoon
Chatham Weather - 2026-09-16 - Afternoon - Sunny
74°F 23°C
Sunny
Early-Evening
Chatham Weather - 2026-09-16 - Evening - Sunny
68°F 20°C
Sunny
Mild temperatures up to 74°F 23°C, sunny throughout the day, with steady humidity and steady pressure.

Thursday, September 17, 2026

Mid-Morning
Chatham Weather - 2026-09-17 - Morning - Sunny
63°F 17°C
Sunny
Mid-Afternoon
Chatham Weather - 2026-09-17 - Afternoon - Sunny
70°F 21°C
Sunny
Early-Evening
Chatham Weather - 2026-09-17 - Evening - Sunny
66°F 19°C
Sunny
Mild with a high of 70°F 21°C, sunny throughout the day, with steady humidity and steady pressure.

Friday, September 18, 2026

Mid-Morning
Chatham Weather - 2026-09-18 - Morning - Partly Cloudy
63°F 17°C
Partly Cloudy
Mid-Afternoon
Chatham Weather - 2026-09-18 - Afternoon - Overcast
69°F 21°C
Overcast
Early-Evening
Chatham Weather - 2026-09-18 - Evening - Overcast
61°F 17°C
Overcast
Pleasant near 69°F 21°C, cloudy in the morning, becoming overcast through the afternoon and evening, with increasing humidity and barometric pressure falling. Winds swinging from the SSW to the SE at 6 mph 9 km/h.

Saturday, September 19, 2026

Mid-Morning
Chatham Weather - 2026-09-19 - Morning - Scattered Showers
57°F 14°C
Scattered Showers
Mid-Afternoon
Chatham Weather - 2026-09-19 - Afternoon - Overcast
59°F 15°C
Overcast
Early-Evening
Chatham Weather - 2026-09-19 - Evening - Overcast
56°F 13°C
Overcast
Cool with a high near 59°F 15°C, locally heavy downpours at times, with lower humidity and barometric pressure rising. Winds shifting from the N to the NNE at 10 mph 17 km/h.

Sunday, September 20, 2026

Mid-Morning
Chatham Weather - 2026-09-20 - Morning - Sunny
51°F 10°C
Sunny
Mid-Afternoon
Chatham Weather - 2026-09-20 - Afternoon - Overcast
61°F 16°C
Overcast
Early-Evening
Chatham Weather - 2026-09-20 - Evening - Sunny
57°F 14°C
Sunny
Refreshing around 61°F 16°C, sunny in the morning, partly cloudy in the afternoon, and sunny this evening, with steady humidity and barometric pressure falling.

Monday, September 21, 2026

Mid-Morning
Chatham Weather - 2026-09-21 - Morning - Sunny
56°F 13°C
Sunny
Mid-Afternoon
Chatham Weather - 2026-09-21 - Afternoon - Sunny
69°F 21°C
Sunny
Early-Evening
Chatham Weather - 2026-09-21 - Evening - Sunny
64°F 18°C
Sunny
Mild temperatures up to 69°F 21°C, sunny throughout the day, with steady humidity and steady pressure.

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Weather by the Numbers

Tue, 8th
Chatham IL Weather - Tuesday, Sep 8, 2026 - Partly Cloudy
Hi: 87°F 30°C
Lo: 59°F 15°C
Sunrise 06:23 AM
Sunset 07:11 PM
Wind SSW 5 mph8 km/h
Dew Point 59°F15°C
uv Index 7
Barometric Pressure 30.12 in1020 mb
POP 4% *
Humidity 43%
Wed, 9th
Chatham IL Weather - Wednesday, Sep 9, 2026 - Overcast
Hi: 78°F 26°C
Lo: 70°F 21°C
Sunrise 06:24 AM
Sunset 07:10 PM
Wind SW 7 mph11 km/h
Dew Point 64°F18°C
uv Index 1
Barometric Pressure 29.97 in1015 mb
POP 16% *
Humidity 66%
Thu, 10th
Chatham IL Weather - Thursday, Sep 10, 2026 - Overcast
Hi: 77°F 25°C
Lo: 66°F 19°C
Sunrise 06:25 AM
Sunset 07:08 PM
Wind NNE 7 mph11 km/h
Dew Point 57°F14°C
uv Index 3
Barometric Pressure 30 in1016 mb
POP 14% *
Humidity 58%
Fri, 11th
Chatham IL Weather - Friday, Sep 11, 2026 - Sunny
Hi: 83°F 28°C
Lo: 60°F 15°C
Sunrise 06:26 AM
Sunset 07:06 PM
Wind S 7 mph12 km/h
Dew Point 55°F13°C
uv Index 6
Barometric Pressure 29.91 in1013 mb
POP 2% *
Humidity 47%
Sat, 12th
Chatham IL Weather - Saturday, Sep 12, 2026 - Overcast
Hi: 85°F 29°C
Lo: 67°F 19°C
Sunrise 06:27 AM
Sunset 07:05 PM
Wind SSW 7 mph12 km/h
Dew Point 58°F14°C
uv Index 6
Barometric Pressure 29.94 in1014 mb
POP 11% *
Humidity 51%
Sun, 13th
Chatham IL Weather - Sunday, Sep 13, 2026 - Overcast
Hi: 79°F 26°C
Lo: 68°F 20°C
Sunrise 06:28 AM
Sunset 07:03 PM
Wind SSW 5 mph8 km/h
Dew Point 67°F19°C
uv Index 5
Barometric Pressure 30.03 in1017 mb
POP 19% *
Humidity 73%
Mon, 14th
Chatham IL Weather - Monday, Sep 14, 2026 - Light Rain Shower
Hi: 79°F 26°C
Lo: 68°F 20°C
Sunrise 06:29 AM
Sunset 07:01 PM
Wind SW 5 mph8 km/h
Dew Point 68°F20°C
uv Index 5
Barometric Pressure 29.94 in1014 mb
POP 46% *
Humidity 91%
Tue, 15th
Chatham IL Weather - Tuesday, Sep 15, 2026 - Patchy Rain Nearby
Hi: 75°F 24°C
Lo: 66°F 19°C
Sunrise 06:30 AM
Sunset 06:59 PM
Wind WNW 11 mph17 km/h
Dew Point 61°F16°C
uv Index 5
Barometric Pressure 30.06 in1018 mb
POP 22% *
Humidity 68%
Wed, 16th
Chatham IL Weather - Wednesday, Sep 16, 2026 - Sunny
Hi: 74°F 23°C
Lo: 61°F 16°C
Sunrise 06:31 AM
Sunset 06:58 PM
Wind E 4 mph7 km/h
Dew Point 51°F11°C
uv Index 6
Barometric Pressure 30.36 in1028 mb
POP 2% *
Humidity 49%
Thu, 17th
Chatham IL Weather - Thursday, Sep 17, 2026 - Sunny
Hi: 70°F 21°C
Lo: 60°F 16°C
Sunrise 06:32 AM
Sunset 06:56 PM
Wind SSW 5 mph8 km/h
Dew Point 43°F6°C
uv Index 5
Barometric Pressure 30.39 in1029 mb
POP 1% *
Humidity 42%
Fri, 18th
Chatham IL Weather - Friday, Sep 18, 2026 - Overcast
Hi: 69°F 21°C
Lo: 58°F 14°C
Sunrise 06:33 AM
Sunset 06:54 PM
Wind SSW 9 mph14 km/h
Dew Point 47°F8°C
uv Index 5
Barometric Pressure 30.15 in1021 mb
POP 11% *
Humidity 46%
Sat, 19th
Chatham IL Weather - Saturday, Sep 19, 2026 - Overcast
Hi: 61°F 16°C
Lo: 53°F 12°C
Sunrise 06:34 AM
Sunset 06:52 PM
Wind ESE 14 mph23 km/h
Dew Point 43°F6°C
uv Index 4
Barometric Pressure 30.21 in1023 mb
POP 13% *
Humidity 56%
Sun, 20th
Chatham IL Weather - Sunday, Sep 20, 2026 - Sunny
Hi: 62°F 17°C
Lo: 45°F 7°C
Sunrise 06:35 AM
Sunset 06:51 PM
Wind E 5 mph8 km/h
Dew Point 33°F1°C
uv Index 4
Barometric Pressure 30.3 in1026 mb
POP 6% *
Humidity 39%
Mon, 21st
Chatham IL Weather - Monday, Sep 21, 2026 - Sunny
Hi: 69°F 21°C
Lo: 50°F 10°C
Sunrise 06:36 AM
Sunset 06:49 PM
Wind SSE 3 mph5 km/h
Dew Point 38°F3°C
uv Index 5
Barometric Pressure 30.27 in1025 mb
POP 1% *
Humidity 37%
* POP = Probability of Precipitation. Data for 12:00 PM.