A lack of rain over south-central and southeast Wisconsin during the month of June allowed a drought to slowly develop over the area by June 26th or so.  Rainfall amounts ranged from around 3/10 inch in the south-central area to around 3 inches in the city of Sheboygan.  This translated to monthly deficits ranging from around 4 inches to 1 inch.  Sufficient soil moisture allowed for crops to grow normally, however, by the end of June it became apparent higher parts of farm fields were drying out and corn and soybean crops were showing signs of stress.  Some locations in south-central and southeast Wisconsin actually started drying out toward the end of May.  For example, the corridor from Madison-Janesville through Jefferson County into Washington County had monthly rainfall deficits of 1/10 to 1/3 inch for May, 2012.
The drought intensity and areal coverage increased rapidly from around June 26th to the end of the month. On June 26th, most of south-central and southeast Wisconsin were rated at least D0 on the U.S. Drought Monitor, and the area along and near State Highway 11 across the southern tier of counties had a D1 classification.  This drought continued into July, 2012.

Drought in MILWAUKEE, WISCONSIN
From 26-JUN-12 06:00:00 to 30-JUN-12 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Drought in LAFAYETTE, WISCONSIN
From 26-JUN-12 06:00:00 to 30-JUN-12 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Drought in GREEN, WISCONSIN
From 26-JUN-12 06:00:00 to 30-JUN-12 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Drought in ROCK, WISCONSIN
From 26-JUN-12 06:00:00 to 30-JUN-12 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Drought in WALWORTH, WISCONSIN
From 26-JUN-12 06:00:00 to 30-JUN-12 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Drought in RACINE, WISCONSIN
From 26-JUN-12 06:00:00 to 30-JUN-12 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Drought in KENOSHA, WISCONSIN
From 26-JUN-12 06:00:00 to 30-JUN-12 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Drought in MARQUETTE, WISCONSIN
From 26-JUN-12 06:00:00 to 30-JUN-12 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Drought in FOND DU LAC, WISCONSIN
From 26-JUN-12 06:00:00 to 30-JUN-12 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Drought in GREEN LAKE, WISCONSIN
From 26-JUN-12 06:00:00 to 30-JUN-12 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Drought in SHEBOYGAN, WISCONSIN
From 26-JUN-12 06:00:00 to 30-JUN-12 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Drought in SAUK, WISCONSIN
From 26-JUN-12 06:00:00 to 30-JUN-12 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Drought in COLUMBIA, WISCONSIN
From 26-JUN-12 06:00:00 to 30-JUN-12 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Drought in DODGE, WISCONSIN
From 26-JUN-12 06:00:00 to 30-JUN-12 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Drought in WASHINGTON, WISCONSIN
From 26-JUN-12 06:00:00 to 30-JUN-12 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Drought in OZAUKEE, WISCONSIN
From 26-JUN-12 06:00:00 to 30-JUN-12 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Drought in IOWA, WISCONSIN
From 26-JUN-12 06:00:00 to 30-JUN-12 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Drought in DANE, WISCONSIN
From 26-JUN-12 06:00:00 to 30-JUN-12 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Drought in JEFFERSON, WISCONSIN
From 26-JUN-12 06:00:00 to 30-JUN-12 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Drought in WAUKESHA, WISCONSIN
From 26-JUN-12 06:00:00 to 30-JUN-12 23:59:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer