Vegetation Period & Dry Spells
in Maryland: January 1 - August 31, 2025


NOTE: Data From preliminary NCEI's nClimDiv-Daily Data set v1.0.0
Data labeled as scaled on September 16, 2025.

RegionDuration of the
Vegetation Period (days)		Day when
Vegetation Period*
Starts		Day when
Vegetation Period*
Ends+		Number of Dry Spells
in the
Vegetation Period		Mean Duration of
Dry Spells
in the
Vegetation Period		Longest Dry Spells
in the
Vegetation Period		Starting Date of
Longest Dry Spell
in the Vegetation Period
Statewide 18825 Feb31 Aug 22 5 12 2 Aug
Clim. Div. 1 180 5 Mar31 Aug 25 5 12 2 Aug
Clim. Div. 2 18825 Feb31 Aug 24 5 1313 Apr
Clim. Div. 3 18825 Feb31 Aug 25 5 12 2 Aug
Clim. Div. 4 18825 Feb31 Aug 26 5 12 2 Aug
Clim. Div. 5 18825 Feb31 Aug 25 5 1313 Apr
Clim. Div. 6 18825 Feb31 Aug 24 5 12 2 Aug
Clim. Div. 7 17510 Mar31 Aug 21 4 12 2 Aug
Clim. Div. 8 17411 Mar31 Aug 22 4 11 2 Aug
Allegany 17510 Mar31 Aug 20 5 12 2 Aug
Anne Arundel 18825 Feb31 Aug 25 5 12 2 Aug
Baltimore 17510 Mar31 Aug 22 5 1313 Apr
Calvert 18825 Feb31 Aug 25 5 12 2 Aug
Caroline 18825 Feb31 Aug 24 5 1313 Apr
Carroll 17510 Mar31 Aug 22 5 1313 Apr
Cecil 17510 Mar31 Aug 23 4 1313 Apr
Charles 18825 Feb31 Aug 26 5 12 2 Aug
Dorchester 18825 Feb31 Aug 26 5 10 7 Mar
Frederick 17510 Mar31 Aug 22 4 12 2 Aug
Garrett 17411 Mar31 Aug 22 4 11 2 Aug
Harford 17510 Mar31 Aug 22 5 1313 Apr
Howard 18825 Feb31 Aug 23 5 12 2 Aug
Kent 17510 Mar31 Aug 24 4 1313 Apr
Montgomery 18825 Feb31 Aug 22 5 12 2 Aug
Prince George's18825 Feb31 Aug 26 5 12 2 Aug
Queen Anne's 18825 Feb31 Aug 24 5 1313 Apr
Saint Mary's 18825 Feb31 Aug 25 5 10 7 Mar
Somerset 180 5 Mar31 Aug 25 5 1013 Jun
Talbot 18825 Feb31 Aug 24 5 1313 Apr
Washington 17510 Mar31 Aug 22 4 12 2 Aug
Wicomico 18825 Feb31 Aug 25 5 12 2 Aug
Worcester 180 5 Mar31 Aug 25 5 12 2 Aug
Baltimore City 18825 Feb31 Aug 23 5 12 2 Aug

+A this time, this column shows the last day of data.

*The Vegetation Period is defined as the period between the first day of the first occurrence of a 6-day period
with daily mean temperatures equal to or above 41°F and the day before the first occurrence of a 6-day period
with daily mean temperatures below 41°F after the first of July.