As of 08:18 CDT

Weather in Grimsby, IL

52°

Grimsby, Friday, 9 October, 08:18

Clear. Feels like 51°. High 86°, low 52°.

Pressure30.12 inHg

Wind0 mph N

Humidity87%

Visibility6.2 mi

Dew point49°

See detailed hourly forecast

Sat, 1075° / 56°

75 °

Grimsby, Saturday, 10 October

Overcast. High 75°, low 56°.

Pressure30.03 inHg

Wind4.2 mph NE

Humidity60%

Visibility6.2 mi

Dew point54°

Sun, 1182° / 55°

82 °

Grimsby, Sunday, 11 October

Clear. High 82°, low 55°.

Pressure29.97 inHg

Wind5 mph W

Humidity55%

Visibility6.2 mi

Dew point58°

Mon, 1289° / 65°

89 °

Grimsby, Monday, 12 October

Clear. High 89°, low 65°.

Pressure29.94 inHg

Wind11.1 mph SW

Humidity44%

Visibility6.2 mi

Dew point61°

Tue, 1391° / 68°

91 °

Grimsby, Tuesday, 13 October

Clear. High 91°, low 68°.

Pressure29.88 inHg

Wind10 mph SW

Humidity49%

Visibility—

Dew point64°

Wed, 1476° / 71°

0.33

76 °

Grimsby, Wednesday, 14 October

Rain. High 76°, low 71°.

Pressure29.94 inHg

Wind5.7 mph E

Humidity98%

Visibility—

Dew point73°

Thu, 1581° / 65°

0.06

81 °

Grimsby, Thursday, 15 October

Light rain. High 81°, low 65°.

Pressure29.94 inHg

Wind9.9 mph S

Humidity53%

Visibility—

Dew point59°

Fri, 1678° / 52°

0.1

78 °

Grimsby, Friday, 16 October

Light rain. High 78°, low 52°.

Pressure30.06 inHg

Wind20.2 mph W

Humidity27%

Visibility—

Dew point34°

Sat, 1755° / 40°

55 °

Grimsby, Saturday, 17 October

Clear. High 55°, low 40°.

Pressure30.42 inHg

Wind17.5 mph NW

Humidity28%

Visibility—

Dew point20°

Sun, 1861° / 34°

61 °

Grimsby, Sunday, 18 October

Clear. High 61°, low 34°.

Pressure30.39 inHg

Wind7.1 mph S

Humidity25%

Visibility—

Dew point19°

Mon, 1966° / 41°

66 °

Grimsby, Monday, 19 October

Overcast. High 66°, low 41°.

Pressure30.30 inHg

Wind10 mph SW

Humidity21%

Visibility—

Dew point22°

Tue, 2074° / 46°

74 °

Grimsby, Tuesday, 20 October

Clear. High 74°, low 46°.

Pressure30.33 inHg

Wind8.2 mph S

Humidity25%

Visibility—

Dew point31°

Wed, 2176° / 53°

76 °

Grimsby, Wednesday, 21 October

Overcast. High 76°, low 53°.

Pressure30.27 inHg

Wind11.4 mph S

Humidity26%

Visibility—

Dew point34°

Thu, 2277° / 51°

0.01

77 °

Grimsby, Thursday, 22 October

Light rain. High 77°, low 51°.

Pressure30.06 inHg

Wind15.1 mph S

Humidity38%

Visibility—

Dew point46°

Fri, 2362° / 47°

0.08

62 °

Grimsby, Friday, 23 October

Light rain. High 62°, low 47°.

Pressure30.09 inHg

Wind16.3 mph NW

Humidity33%

Visibility—

Dew point31°

Sat, 2454° / 35°

54 °

Grimsby, Saturday, 24 October

Clear. High 54°, low 35°.

Pressure30.21 inHg

Wind14 mph NW

Humidity33%

Visibility—

Dew point22°

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 Grimsby, 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 Grimsby, 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.