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As of 17:34 EDT

Weather in Grattan, MI

81°Current weather

Grattan, Saturday, 8 August, 17:34

Clear. Feels like 82°. High 81°, low 66°.

Pressure29.94 inHg
Wind3 mph W
Humidity50%
Visibility6.2 mi
Dew point61°
Sun, 0981° / 65°0.09Rain
81 °Rain

Grattan, Sunday, 9 August

Rain. High 81°, low 65°.

Pressure29.97 inHg
Wind11.9 mph SW
Humidity40%
Visibility6.2 mi
Dew point55°
Mon, 1088° / 68°0.48Rain
88 °Rain

Grattan, Monday, 10 August

Rain. High 88°, low 68°.

Pressure29.88 inHg
Wind3.1 mph W
Humidity88%
Visibility6.2 mi
Dew point71°
Tue, 1174° / 64°0.77Heavy rain
74 °Heavy rain

Grattan, Tuesday, 11 August

Heavy rain. High 74°, low 64°.

Pressure29.85 inHg
Wind11.3 mph NE
Humidity98%
Visibility3.2 mi
Dew point68°
Wed, 1283° / 61°0Clear
83 °Clear

Grattan, Wednesday, 12 August

Clear. High 83°, low 61°.

Pressure29.83 inHg
Wind5.7 mph NW
Humidity60%
Visibility6.2 mi
Dew point64°
Thu, 1375° / 57°0.14Light rain
75 °Light rain

Grattan, Thursday, 13 August

Light rain. High 75°, low 57°.

Pressure29.94 inHg
Wind11.1 mph NE
Humidity42%
Visibility—
Dew point47°
Fri, 1475° / 51°0Clear
75 °Clear

Grattan, Friday, 14 August

Clear. High 75°, low 51°.

Pressure30.15 inHg
Wind10.8 mph N
Humidity39%
Visibility—
Dew point43°
Sat, 1575° / 53°0Overcast
75 °Overcast

Grattan, Saturday, 15 August

Overcast. High 75°, low 53°.

Pressure30.30 inHg
Wind9.3 mph W
Humidity50%
Visibility—
Dew point49°
Sun, 1680° / 55°0Overcast
80 °Overcast

Grattan, Sunday, 16 August

Overcast. High 80°, low 55°.

Pressure30.21 inHg
Wind10.9 mph SW
Humidity42%
Visibility—
Dew point50°
Mon, 1774° / 60°0.02Light rain
74 °Light rain

Grattan, Monday, 17 August

Light rain. High 74°, low 60°.

Pressure30.03 inHg
Wind8.7 mph SW
Humidity90%
Visibility—
Dew point62°
Tue, 1885° / 64°0Light rain
85 °Light rain

Grattan, Tuesday, 18 August

Light rain. High 85°, low 64°.

Pressure30.00 inHg
Wind8.9 mph NW
Humidity34%
Visibility—
Dew point49°
Wed, 1979° / 59°0.23Light rain
79 °Light rain

Grattan, Wednesday, 19 August

Light rain. High 79°, low 59°.

Pressure29.97 inHg
Wind10.5 mph E
Humidity61%
Visibility—
Dew point57°
Thu, 2076° / 63°0.08Light rain
76 °Light rain

Grattan, Thursday, 20 August

Light rain. High 76°, low 63°.

Pressure29.88 inHg
Wind10.4 mph NE
Humidity68%
Visibility—
Dew point62°
Fri, 2180° / 59°0Overcast
80 °Overcast

Grattan, Friday, 21 August

Overcast. High 80°, low 59°.

Pressure29.91 inHg
Wind9.8 mph NW
Humidity49%
Visibility—
Dew point55°
Sat, 2266° / 52°0.67Rain
66 °Rain

Grattan, Saturday, 22 August

Rain. High 66°, low 52°.

Pressure29.94 inHg
Wind13.9 mph N
Humidity78%
Visibility—
Dew point54°
Sun, 2369° / 43°0Overcast
69 °Overcast

Grattan, Sunday, 23 August

Overcast. High 69°, low 43°.

Pressure30.24 inHg
Wind9.1 mph N
Humidity46%
Visibility—
Dew point41°

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 Grattan, MI 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 Grattan, MI 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.