National Weather Service United States Department of Commerce
Onset of Wet and Dry Seasons at 
Sanford, FL
(Updated through 2023)

 
 
 Wet Season Onset

Dry Season Onset

Wet Season Length

Median Date 
5/27

10/16

143 days

Earliest 
 5/5 (1966)

9/23 (2021)

Shortest --106 (1984)

Latest 
  7/6 (1998)

11/4 (1971)

Longest--173 (1969)

1950
6/17

10/22

127 days

1951
6/4

10/28

146

1952
5/18

10/28

163

1953
6/5

10/10

127

1954
5/27

10/15

141

1955
6/10

10/14

126

1956
5/26

10/18

145

1957
5/11

10/4

146

1958
5/21

10/20

152

1959
5/12

10/25

166

1960
6/2

10/21

141

1961
6/7

10/15

130

1962
5/28

10/19

144

1963
5/22

10/19

150

1964
5/31

10/16

138

1965
5/29

10/19

143

1966
5/5

10/12

160

1967
6/1

9/29

120

1968
5/24

10/20

149

1969
5/14

11/3

173

1970
5/24

10/31

160

1971
6/8

11/4

149

1972
5/7

10/6

152

1973
5/24

10/24

153

1974
5/12

10/1

142

1975
5/8

10/19

164

1976
5/8

10/1

146

1977
5/23

10/4

134

1978
6/1

10/7

128

1979
5/30

10/5

128

1980
5/16

10/4

141

1981
5/27

10/15

141

1982
5/21

10/15

147

1983
5/30

10/25

148

1984
6/17

10/1

106

1985
6/8

11/4

149

1986
6/2

10/16

136

1987
5/10

10/2

145

1988
6/5

10/7

124

1989
5/22

10/20

151

1990
6/3

10/25

144

1991
5/13

10/7

147

1992
5/27

10/12

138

1993
5/29

10/11

135

1994
5/28

10/17

142

1995
5/20

10/19

152

1996
5/20

10/9

142

1997
5/18

10/19

154

1998
7/6

10/22

108

1999
5/27

10/22

148

2000
6/11

10/9

120

2001
5/22

9/30

131

2002
5/26

10/16

143

2003
6/2

10/15

135

2004

6/2

10/14

134

2005

5/30

10/25

148

2006

5/29

9/27

121

2007

6/1

11/3

155

2008

6/9

10/14

127

2009

5/17

9/30

136

2010

5/30

9/30

124

2011

6/14 

10/19

127

2012

5/27

10/28

154

2013 5/19 10/9 143
2014 6/7  10/5 120
2015 6/1 10/3 124
2016 5/16 10/19 156
2017 5/30

10/24

147
2018 5/12 10/12 153
2019 6/1 11/01 153
2020 5/21 10/30 162
2021 6/2 9/23 113
2022 6/4 9/30 118
2023 5/18 10/14 149