Current Conditions

Chatham, Illinois

72°F22°C
Rain

Wind

ESE 5 mph8 km/h

Humidity

94%

Cloud Cover

92%

As of Thursday, August 13, 2026 at 5:51 AM CDT

Today's Outlook

Day

Overcast and warm, with a high of 77°F25°C and morning low of 72°F22°C. Breezy from the ESE at 6 to 8 mph9 to 13 km/h. 77% chance of light rain in the afternoon. Heavy, humid air.

Night

Mostly cloudy, with a low around 72°F22°C. Light wind from the E around 5 mph8 km/h. 88% chance of rain in the evening.

7-Day Forecast

DayConditionHigh (°F)Low (°F)Precip (mm)Cloud Cover (%)Wind (mph)
RainHigh 77°F25°CLow 72°F22°CPrecip 0.25 in6.3 mm88%Cloud 85%Wind E 5 mph9 km/hThursday: Overcast and warm, with a high of 77°F25°C and morning low of 72°F22°C. Breezy from the ESE at 6 to 8 mph9 to 13 km/h. 77% chance of light rain in the afternoon. Heavy, humid air. Thursday Night: Mostly cloudy, with a low around 72°F22°C. Light wind from the E around 5 mph8 km/h. 88% chance of rain in the evening.
RainHigh 77°F25°CLow 73°F23°CPrecip 0.64 in16.2 mm86%Cloud 96%Wind E 7 mph11 km/hFriday: Overcast and warm, with a high of 77°F25°C. Breezy from the E at 6 to 7 mph10 to 11 km/h. 86% chance of rain throughout the day. Heavy, humid air. Friday Night: Overcast, with a low around 73°F23°C. Breezy from the ENE at 7 mph11 km/h. 78% chance of rain throughout the night.
RainHigh 79°F26°CLow 73°F23°CPrecip 0.51 in13 mm72%Cloud 91%Wind SE 7 mph11 km/hSaturday: Overcast and warm, with a high of 79°F26°C and morning low of 73°F23°C. Breezy from the SSE at 8 to 9 mph13 to 14 km/h. 72% chance of rain throughout the day. Heavy, humid air. Saturday Night: Overcast, with a low around 74°F23°C. Breezy from the SE at 6 to 7 mph10 to 11 km/h. 41% chance of light rain throughout the night.
Light RainHigh 83°F28°CFeels 89°F32°CLow 75°F24°CPrecip 0.27 in6.8 mm56%Cloud 80%Wind W 8 mph12 km/hSunday: Overcast and warm, with a high of 83°F28°C and morning low of 75°F24°C — feels like 90°F32°C. Breezy from the W at 8 to 9 mph13 to 15 km/h. 47% chance of light rain throughout the day. Heavy, humid air. Sunday Night: Mostly cloudy, with a low around 75°F24°C. Breezy from the W at 7 to 8 mph12 to 13 km/h. 56% chance of light rain throughout the night.
ShowersHigh 75°F24°CLow 71°F22°CPrecip 0.07 in1.9 mm31%Cloud 54%Wind NNE 8 mph13 km/hMonday: Mostly cloudy and warm, with a high of 75°F24°C. Breezy from the NNE at 9 mph14 km/h. 22% chance of drizzle throughout the day. Monday Night: Partly cloudy, with a low around 71°F22°C. Breezy from the NNE at 7 to 10 mph12 to 16 km/h. 31% chance of showers overnight.
Partly CloudyHigh 81°F27°CLow 68°F20°CPrecip 0.01 in0.3 mm8%Cloud 55%Wind SSW 7 mph11 km/hTuesday: Mostly cloudy and warm, with a high of 81°F27°C and morning low of 68°F20°C. Breezy from the SW at 7 to 8 mph11 to 13 km/h. Tuesday Night: Mostly cloudy, with a low around 68°F20°C. Breezy from the SSW at 7 to 9 mph11 to 15 km/h.
Light RainHigh 79°F26°CLow 72°F22°CPrecip 0.3 in7.5 mm49%Cloud 75%Wind SW 10 mph16 km/hWednesday: Mostly cloudy and warm, with a high of 79°F26°C and morning low of 72°F22°C. Breezy from the SW at 11 mph17 km/h. 49% chance of light rain throughout the day. Humid. Wednesday Night: Mostly cloudy, with a low around 73°F23°C. Breezy from the SSW at 10 mph16 km/h. 31% chance of light rain throughout the night.

15-Day Forecast

Day High Low Precip Cloud Cover Condition Wind
ThursdayAug 1377°F25°C72°F22°C0.25 in6.3 mm· 88%85%RainE 5 mph9 km/h
FridayAug 1477°F25°C73°F23°C0.64 in16.2 mm· 86%96%RainE 7 mph11 km/h
SaturdayAug 1579°F26°C73°F23°C0.51 in13 mm· 72%91%RainSE 7 mph11 km/h
SundayAug 1683°F28°C
Feels 89°F32°C
75°F24°C0.27 in6.8 mm· 56%80%Light RainW 8 mph12 km/h
MondayAug 1775°F24°C71°F22°C0.07 in1.9 mm· 31%54%ShowersNNE 8 mph13 km/h
TuesdayAug 1881°F27°C68°F20°C0.01 in0.3 mm· 8%55%Partly CloudySSW 7 mph11 km/h
WednesdayAug 1979°F26°C72°F22°C0.3 in7.5 mm· 49%75%Light RainSW 10 mph16 km/h
ThursdayAug 2075°F24°C70°F21°C0.09 in2.2 mm· 19%45%ShowersN 9 mph15 km/h
FridayAug 2176°F25°C67°F20°C0.08 in2.1 mm· 15%41%ShowersNE 7 mph12 km/h
SaturdayAug 2277°F25°C68°F20°C0.07 in1.9 mm· 14%36%DrizzleSW 8 mph12 km/h
SundayAug 2378°F26°C68°F20°C0.05 in1.2 mm· 9%34%ClearSSE 8 mph13 km/h
MondayAug 2479°F26°C69°F21°C0.04 in0.9 mm· 7%36%ClearSE 8 mph13 km/h
TuesdayAug 2580°F26°C69°F21°C0.03 in0.8 mm· 8%36%ClearS 8 mph13 km/h
WednesdayAug 2679°F26°C70°F21°C0.05 in1.3 mm· 10%39%DrizzleENE 8 mph13 km/h
ThursdayAug 2778°F26°C70°F21°C0.07 in1.8 mm· 12%47%DrizzleENE 8 mph13 km/h

Nearby Cities

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

WeatherMesh consistently outperforms legacy models in independent benchmarks. View Benchmarks →

Access WeatherMesh forecasts programmatically via our API. API Documentation →

How to Access Weather Forecasts

PatternExampleDescription
/weather/{country}/{city}//weather/united-states/san-francisco/City forecast (canonical URL)
/weather/{city}//weather/tokyo/Shorthand — redirects to most populous match
/weather/{country}/{region}/{city}//weather/united-states/california/san-francisco/With region — redirects to canonical
/weather/nearby?lat={lat}&lon={lon}/weather/nearby?lat=48.1&lon=11.5Find nearest city by coordinates
/weather/{country}//weather/germany/Country index — all cities by region

Country and city names use lowercase slugs with hyphens (e.g. united-states, san-francisco). Arbitrary city names are supported — if not in our database, we geocode the name and serve the forecast for that location.

For programmatic access, use theWindBorne Forecast APIwhich returns structured JSON for any coordinates worldwide.

Coordinates: 41.7411°N, 87.6125°W·Elevation: 180m·Timezone: America/Chicago·Population: 31,392