As of 13:18 CDT

Weather in Grantfork, IL

86°

Grantfork, Friday, 9 October, 13:18

Clear. Feels like 83°. High 86°, low 53°.

Pressure30.09 inHg

Wind11.1 mph S

Humidity28%

Visibility6.2 mi

Dew point50°

See detailed hourly forecast

Sat, 1077° / 56°

77 °

Grantfork, Saturday, 10 October

Overcast. High 77°, low 56°.

Pressure30.06 inHg

Wind5.4 mph SE

Humidity47%

Visibility6.2 mi

Dew point52°

Sun, 1183° / 58°

83 °

Grantfork, Sunday, 11 October

Clear. High 83°, low 58°.

Pressure29.94 inHg

Wind4.7 mph W

Humidity45%

Visibility6.2 mi

Dew point55°

Mon, 1292° / 65°

92 °

Grantfork, Monday, 12 October

Clear. High 92°, low 65°.

Pressure29.91 inHg

Wind10.5 mph SW

Humidity39%

Visibility6.2 mi

Dew point59°

Tue, 1389° / 72°

89 °

Grantfork, Tuesday, 13 October

Overcast. High 89°, low 72°.

Pressure29.88 inHg

Wind9.6 mph W

Humidity53%

Visibility6.2 mi

Dew point67°

Wed, 1475° / 67°

0.58

75 °

Grantfork, Wednesday, 14 October

Rain. High 75°, low 67°.

Pressure29.97 inHg

Wind8.5 mph NE

Humidity89%

Visibility—

Dew point68°

Thu, 1579° / 56°

0.81

79 °

Grantfork, Thursday, 15 October

Heavy rain. High 79°, low 56°.

Pressure29.97 inHg

Wind12.8 mph S

Humidity67%

Visibility—

Dew point57°

Fri, 1676° / 49°

0.03

76 °

Grantfork, Friday, 16 October

Light rain. High 76°, low 49°.

Pressure30.03 inHg

Wind23.3 mph NW

Humidity30%

Visibility—

Dew point30°

Sat, 1751° / 40°

51 °

Grantfork, Saturday, 17 October

Clear. High 51°, low 40°.

Pressure30.42 inHg

Wind20 mph NW

Humidity37%

Visibility—

Dew point23°

Sun, 1859° / 35°

59 °

Grantfork, Sunday, 18 October

Clear. High 59°, low 35°.

Pressure30.36 inHg

Wind9 mph S

Humidity29%

Visibility—

Dew point21°

Mon, 1968° / 42°

68 °

Grantfork, Monday, 19 October

Overcast. High 68°, low 42°.

Pressure30.27 inHg

Wind9.7 mph SW

Humidity23%

Visibility—

Dew point23°

Tue, 2073° / 46°

73 °

Grantfork, Tuesday, 20 October

Clear. High 73°, low 46°.

Pressure30.33 inHg

Wind8.2 mph S

Humidity23%

Visibility—

Dew point28°

Wed, 2176° / 54°

76 °

Grantfork, Wednesday, 21 October

Overcast. High 76°, low 54°.

Pressure30.24 inHg

Wind12.3 mph S

Humidity27%

Visibility—

Dew point36°

Thu, 2273° / 53°

0.06

73 °

Grantfork, Thursday, 22 October

Light rain. High 73°, low 53°.

Pressure30.03 inHg

Wind13.2 mph S

Humidity39%

Visibility—

Dew point43°

Fri, 2360° / 44°

0.02

60 °

Grantfork, Friday, 23 October

Light rain. High 60°, low 44°.

Pressure30.09 inHg

Wind18.3 mph NW

Humidity40%

Visibility—

Dew point32°

Sat, 2451° / 36°

51 °

Grantfork, Saturday, 24 October

Clear. High 51°, low 36°.

Pressure30.24 inHg

Wind13.7 mph N

Humidity40%

Visibility—

Dew point25°

About the monthly outlook

How accurate is a 30-day forecast?

The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Grantfork, IL are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.

What does "above normal" mean?

We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.

Where do the 66-year records come from?

They are real temperature extremes recorded in Grantfork, IL since 1960: the highest and lowest reading for each calendar date, with the year it happened.

How often is it updated?

The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.