Drought — Vermilion, Illinois

2025-11-01 to 2025-11-30 · Vermilion, Illinois

Event narrative

Due to a three-month precipitation deficit, Moderate Drought (D1) was present at the start of the month. Precipitation remained below normal during November, with the cooperative observer in Danville measuring 2.25 of precipitation which was 1.45 below normal. The continued below normal precipitation and above normal temperatures resulted in a worsening of the drought conditions, with Severe Drought (D2) present across the western half of the county by November 18th. The Severe Drought (D2) then persisted through the rest of the month.

Wider weather episode

For the fourth month in a row, much of the area experienced below normal precipitation, with deficits of 1 to 2 in most areas during the month of November. Temperatures were near or slightly above normal. These conditions led to a persistence or worsening of the ongoing severe (D2) to extreme (D3) drought over the course of the month. Streamflows and lake levels remained below normal, including near record low streamflows on eastern portions of the Sangamon River (upstream of Lake Decatur). In response to these drought conditions, some communities implemented burn bans or voluntary water rationing. Some agricultural impacts were noted, including a wreath selling business that had to cancel sales due to impacts on the evergreen crop.

Precipitation was well below normal across all of central and southeast Illinois, with most sites reporting a deficit between 1 and 2 inches. Drought conditions persisted or worsened. Monthly average streamflows across most of central and southeast Illinois were classified below normal, including near record low flow on portions of the eastern Sangamon River. Temperatures were near to slightly above normal.

Source: NOAA Storm Events Database, event_id 1300533. Narrative written by the NWS forecast office that issued the report.