EN
English Español

As of 12:59 CDT

Weather in Grimsby, IL

87°Current weather

Grimsby, Saturday, 8 August, 12:59

Overcast. Feels like 93°. High 87°, low 71°.

Pressure30.06 inHg
Wind6.8 mph S
Humidity61%
Visibility6.2 mi
Dew point72°
Sun, 0992° / 71°0Clear
92 °Clear

Grimsby, Sunday, 9 August

Clear. High 92°, low 71°.

Pressure30.03 inHg
Wind11.3 mph S
Humidity53%
Visibility6.2 mi
Dew point69°
Mon, 1096° / 73°0Partly cloudy
96 °Partly cloudy

Grimsby, Monday, 10 August

Partly cloudy. High 96°, low 73°.

Pressure30.00 inHg
Wind13.9 mph SW
Humidity48%
Visibility6.2 mi
Dew point70°
Tue, 1199° / 76°0Clear
99 °Clear

Grimsby, Tuesday, 11 August

Clear. High 99°, low 76°.

Pressure29.94 inHg
Wind15 mph SW
Humidity41%
Visibility6.2 mi
Dew point68°
Wed, 1297° / 76°0.04Light rain
97 °Light rain

Grimsby, Wednesday, 12 August

Light rain. High 97°, low 76°.

Pressure29.85 inHg
Wind15.8 mph SW
Humidity38%
Visibility6.2 mi
Dew point67°
Thu, 1380° / 70°0.17Light rain
80 °Light rain

Grimsby, Thursday, 13 August

Light rain. High 80°, low 70°.

Pressure29.88 inHg
Wind10.2 mph NE
Humidity74%
Visibility—
Dew point70°
Fri, 1482° / 62°0Light rain
82 °Light rain

Grimsby, Friday, 14 August

Light rain. High 82°, low 62°.

Pressure30.12 inHg
Wind9.5 mph NE
Humidity42%
Visibility—
Dew point53°
Sat, 1581° / 60°0Overcast
81 °Overcast

Grimsby, Saturday, 15 August

Overcast. High 81°, low 60°.

Pressure30.18 inHg
Wind9.3 mph S
Humidity50%
Visibility—
Dew point55°
Sun, 1681° / 68°2.25Heavy rain
81 °Heavy rain

Grimsby, Sunday, 16 August

Heavy rain. High 81°, low 68°.

Pressure30.09 inHg
Wind12.5 mph S
Humidity94%
Visibility—
Dew point71°
Mon, 1793° / 75°0.04Light rain
93 °Light rain

Grimsby, Monday, 17 August

Light rain. High 93°, low 75°.

Pressure29.91 inHg
Wind10.8 mph S
Humidity57%
Visibility—
Dew point72°
Tue, 1886° / 71°0.41Rain
86 °Rain

Grimsby, Tuesday, 18 August

Rain. High 86°, low 71°.

Pressure29.91 inHg
Wind9.3 mph SW
Humidity64%
Visibility—
Dew point71°
Wed, 1992° / 68°3.09Heavy rain
92 °Heavy rain

Grimsby, Wednesday, 19 August

Heavy rain. High 92°, low 68°.

Pressure29.91 inHg
Wind7.2 mph S
Humidity58%
Visibility—
Dew point71°
Thu, 2074° / 60°0Mostly clear
74 °Mostly clear

Grimsby, Thursday, 20 August

Mostly clear. High 74°, low 60°.

Pressure30.15 inHg
Wind12.9 mph N
Humidity59%
Visibility—
Dew point56°
Fri, 2173° / 53°0Clear
73 °Clear

Grimsby, Friday, 21 August

Clear. High 73°, low 53°.

Pressure30.21 inHg
Wind6.9 mph N
Humidity53%
Visibility—
Dew point51°
Sat, 2275° / 53°0Clear
75 °Clear

Grimsby, Saturday, 22 August

Clear. High 75°, low 53°.

Pressure30.15 inHg
Wind5.3 mph NE
Humidity51%
Visibility—
Dew point51°
Sun, 2379° / 55°0Mostly clear
79 °Mostly clear

Grimsby, Sunday, 23 August

Mostly clear. High 79°, low 55°.

Pressure30.12 inHg
Wind5.5 mph E
Humidity48%
Visibility—
Dew point53°

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.