10-day forecast for New Grand Chain, IL: 69° to 103°, with precipitation expected on 2 days. The table below breaks each day into morning, afternoon, evening and overnight.
103°
Best day: Tuesday, August 18
95° · 0.42 in
Worst day: Wednesday, August 12
Tap any day below to see morning, afternoon, evening and overnight.
Mon, 1095° / 73°0
Morning78°feels 79°
Afternoon94°feels 102°
Evening83°feels 89°
Overnight75°feels 76°
95 °
New Grand Chain, Monday, 10 August
Clear. High 95°, low 73°.
Pressure30.03 inHg
Wind12.5 mph SW
Humidity54%
Visibility6.2 mi
Dew point72°
Tue, 1197° / 75°0
Morning78°feels 79°
Afternoon96°feels 102°
Evening85°feels 89°
Overnight77°feels 79°
97 °
New Grand Chain, Tuesday, 11 August
Clear. High 97°, low 75°.
Pressure29.94 inHg
Wind12.6 mph SW
Humidity49%
Visibility6.2 mi
Dew point71°
Wed, 1295° / 72°0.42
Morning79°feels 79°
Afternoon93°feels 103°
Evening72°feels 73°
Overnight80°feels 80°
95 °
New Grand Chain, Wednesday, 12 August
Rain. High 95°, low 72°.
Pressure29.91 inHg
Wind4.9 mph W
Humidity57%
Visibility6.2 mi
Dew point73°
Thu, 1389° / 69°0.04
Morning74°feels 75°
Afternoon86°feels 93°
Evening82°feels 89°
Overnight70°feels 71°
89 °
New Grand Chain, Thursday, 13 August
Light rain. High 89°, low 69°.
Pressure29.97 inHg
Wind4.9 mph SW
Humidity66%
Visibility6.2 mi
Dew point73°
Fri, 1497° / 75°0
Morning81°feels 83°
Afternoon94°feels 101°
Evening86°feels 94°
Overnight81°feels 84°
97 °
New Grand Chain, Friday, 14 August
Partly cloudy. High 97°, low 75°.
Pressure29.97 inHg
Wind9.7 mph SW
Humidity46%
Visibility—
Dew point68°
Sat, 1598° / 75°0
Morning81°feels 82°
Afternoon94°feels 98°
Evening86°feels 93°
Overnight81°feels 83°
98 °
New Grand Chain, Saturday, 15 August
Mostly clear. High 98°, low 75°.
Pressure30.03 inHg
Wind11.2 mph SW
Humidity39%
Visibility—
Dew point64°
Sun, 1699° / 74°0.05
Morning80°feels 82°
Afternoon93°feels 100°
Evening89°feels 97°
Overnight78°feels 78°
99 °
New Grand Chain, Sunday, 16 August
Light rain. High 99°, low 74°.
Pressure29.97 inHg
Wind10.2 mph W
Humidity46%
Visibility—
Dew point67°
Mon, 1798° / 75°0
Morning80°feels 84°
Afternoon92°feels 103°
Evening88°feels 98°
Overnight82°feels 85°
98 °
New Grand Chain, Monday, 17 August
Overcast. High 98°, low 75°.
Pressure29.97 inHg
Wind7.6 mph SE
Humidity54%
Visibility—
Dew point72°
Tue, 18103° / 76°0
Morning83°feels 84°
Afternoon98°feels 102°
Evening90°feels 95°
Overnight82°feels 84°
103 °
New Grand Chain, Tuesday, 18 August
Clear. High 103°, low 76°.
Pressure29.94 inHg
Wind11.7 mph SW
Humidity33%
Visibility—
Dew point62°
About this forecast
How reliable is a 10-day forecast?
The first 3–5 days are the most reliable, typically within 2–4°. From day six to ten the models show the trend: the direction of change is right more often than the exact numbers.
What does the time-of-day table show?
Temperature in New Grand Chain, IL around 8am, 2pm, 8pm and 2am each day — handy for planning a walk, a drive or work outdoors.
How is the best day chosen?
We weigh the daytime high against precipitation: a warm, dry day scores highest.