RIO PIEDRAS EXP STN, PUERTO RICO

Monthly Average Minimum Temperature (Degrees Fahrenheit)

(668306)

File last updated on May 16,
*** Note *** Provisional Data *** After Year/Month 201202
a = 1 day missing, b = 2 days missing, c = 3 days, ..etc..,
z = 26 or more days missing, A = Accumulations present
Long-term means based on columns; thus, the monthly row may not
sum (or average) to the long-term annual value.
MAXIMUM ALLOWABLE NUMBER OF MISSING DAYS : 5
Individual Months not used for annual or monthly statistics if more than 5 days are missing.
Individual Years not used for annual statistics if any month in that year has more than 5 days missing.
YEAR(S) JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANN
1959 66.00 a 65.29 66.19 68.97 68.55 70.90 71.26 71.10 a 71.60 70.68 68.83 68.23 68.97
1960 65.67 a 66.55 66.71 68.40 70.35 72.30 72.38 e 71.87 71.62 a 70.81 70.07 67.53 a 69.52
1961 66.48 b 65.71 66.42 68.31 a 69.97 70.57 71.70 a 72.39 71.37 70.87 a 68.33 67.61 69.14
1962 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1963 66.81 66.93 66.94 68.80 69.48 71.30 72.52 73.32 72.70 72.40 a 69.53 68.06 69.90
1964 65.90 66.69 67.63 a 68.67 69.90 a 71.37 72.58 73.06 72.43 71.00 68.63 65.90 69.48
1965 63.74 64.89 66.61 66.63 70.42 70.97 72.13 71.97 72.00 71.16 69.77 67.42 68.98
1966 66.90 66.75 68.42 68.73 71.19 71.77 73.39 73.84 71.67 71.29 68.50 68.40 a 70.07
1967 66.29 65.82 65.16 66.97 a 70.29 72.03 72.52 71.61 71.97 71.26 70.37 66.97 69.27
1968 65.71 64.97 66.19 66.60 70.94 71.67 72.42 72.48 71.93 71.03 70.18 b 68.55 69.39
1969 66.19 65.64 69.10 70.87 73.13 73.83 72.77 72.71 73.00 71.74 70.17 66.73 a 70.49
1970 67.26 66.50 67.65 69.00 70.29 72.53 73.52 72.97 71.33 71.26 69.57 68.03 69.99
1971 66.13 66.00 65.21 b 67.10 68.90 70.00 71.00 70.81 73.13 70.32 68.55 a 66.74 68.66
1972 65.42 65.00 65.84 67.03 69.52 72.13 72.90 72.00 71.73 72.74 71.20 68.52 69.50
1973 68.23 67.36 68.68 68.90 71.84 72.63 72.42 72.32 73.23 71.58 69.90 66.74 70.32
1974 66.26 66.61 65.97 67.17 69.23 71.00 71.10 69.97 70.27 69.61 68.73 66.61 68.54
1975 65.35 64.29 64.71 66.13 68.03 69.30 70.74 71.39 71.10 69.74 67.10 66.87 67.90
1976 62.77 60.69 63.81 65.77 68.10 70.23 d 70.52 b 71.48 71.03 70.61 69.60 65.61 67.52
1977 65.10 a 65.79 65.94 66.90 70.00 72.00 72.10 72.39 71.53 71.81 70.57 68.26 69.36
1978 65.52 66.39 68.16 69.20 70.55 71.33 72.52 72.23 71.50 71.19 69.43 67.00 a 69.59
1979 65.32 65.54 66.03 68.87 70.81 72.87 73.39 72.77 72.34 a 72.10 a 70.69 a 67.65 69.86
1980 66.23 66.28 66.32 68.47 72.68 73.70 72.81 73.26 72.70 72.77 69.87 68.29 70.28
1981 66.71 67.29 68.61 70.83 72.16 72.47 73.39 73.45 72.43 71.77 70.70 69.32 70.76
1982 66.26 66.64 65.32 66.93 70.10 72.07 71.58 71.81 71.53 71.10 68.37 66.23 68.99
1983 65.74 65.96 68.84 68.63 71.94 72.80 74.52 72.53 a 72.70 71.29 69.30 67.52 70.15
1984 65.16 66.07 66.32 67.80 69.39 70.87 72.00 71.61 71.53 71.23 69.83 66.90 69.06
1985 ----- z 65.57 65.29 65.50 69.52 71.60 73.16 73.00 72.40 70.13 69.03 65.55 69.16
1986 64.42 64.04 65.81 68.40 69.39 71.67 72.29 72.03 72.57 71.45 70.43 66.81 69.11
1987 65.65 65.75 67.94 71.67 72.58 72.93 73.71 g 74.90 74.20 73.65 72.07 70.77 71.10
1988 67.42 67.03 68.06 69.60 71.90 74.30 73.97 73.94 73.60 72.42 70.60 66.13 70.75
1989 65.10 66.27 b 66.19 67.97 70.52 71.90 73.35 73.48 73.24 a 72.71 71.40 66.74 69.91
1990 66.81 65.96 66.39 67.83 72.19 74.10 73.74 75.03 74.33 74.03 72.07 67.87 70.86
1991 66.45 67.68 67.87 a 67.67 70.97 72.77 73.44 f 74.42 73.00 72.61 70.50 67.26 70.11
1992 65.39 66.97 67.03 70.20 71.65 ----- z 73.23 73.97 73.53 73.00 f 70.83 ----- z 70.31
1993 66.13 64.71 63.68 66.70 68.61 70.20 69.16 68.97 67.00 d 67.35 64.00 63.29 66.65
1994 62.48 61.89 64.23 64.70 64.58 61.93 65.16 69.19 70.57 68.29 63.07 59.32 64.62
1995 59.06 55.43 55.16 68.13 71.16 71.63 72.97 ----- z 72.32 b 71.26 70.47 69.48 67.01
1996 68.16 66.17 67.58 67.80 69.29 70.33 71.13 a 71.58 72.55 a 71.61 70.07 66.77 69.42
1997 65.68 67.75 66.68 67.79 a 70.45 73.17 71.74 73.23 74.07 72.55 ----- z 69.68 70.25
1998 68.65 67.61 68.84 70.50 72.06 ----- z 73.83 b 74.16 73.68 e 73.94 ----- z 71.13 71.44
1999 68.32 65.25 66.68 68.53 72.61 73.00 73.19 73.74 73.27 72.42 ----- z ----- z 70.70
2000 ----- z ----- z ----- z ----- z ----- z 73.20 73.29 ----- z 73.00 71.61 68.87 68.73 a 71.45
2001 66.81 66.18 q 67.28 f 68.50 72.42 72.57 72.90 a 74.10 72.33 72.79 l 70.43 69.65 71.08
2002 68.03 ----- z ----- z 68.50 r 71.52 j 72.33 l 72.07 p 72.70 k 72.68 k 71.65 h 70.27 o 68.69 r 68.03
2003 66.73 p 67.56 j 68.10 k 69.65 m 70.24 j 71.50 j 73.00 p 72.38 j 72.53 k 71.62 j ----- z 67.71 q 9999.00
2004 64.17 s 65.85 p 67.09 i 67.56 l 69.89 m 72.00 j 71.44 v 71.68 l 71.44 n 70.20 p 69.18 s 68.31 r 9999.00
2005 66.18 t 62.67 j 66.31 o 69.79 k 71.44 m 72.06 m 72.33 p 72.55 k 72.76 m 71.47 l 69.94 m 65.33 y 9999.00
2006 64.93 p 65.06 j 65.86 i 67.53 o 70.15 k 71.14 i 71.00 s 72.09 h 71.47 k 71.30 k 68.92 q 67.45 t 9999.00
2007 65.88 o 65.89 i 66.68 l ----- z 71.00 l 71.32 k 70.83 y 71.93 q 70.60 t 70.29 j 68.00 n 66.92 r 9999.00
2008 64.07 p 64.47 j 64.53 l ----- z ----- z 70.86 p 71.69 r 71.57 q 70.68 k 69.94 m 67.36 s 64.91 t 9999.00
2009 64.93 p 63.32 i 63.40 p 65.44 n 69.33 m 69.84 k 72.08 s 70.84 l 70.47 m 69.88 n 68.31 n 67.20 u 9999.00
2010 65.00 r 66.11 j 67.50 q 68.35 m 70.31 o 71.16 k 71.38 w 71.90 k 70.65 j 69.15 k 67.25 n 65.31 o 9999.00
2011 62.79 q 63.37 i 63.90 j 65.31 n 68.00 k 71.00 i 69.75 s 70.46 r 70.58 k 69.68 l 69.47 m 66.20 p 9999.00
2012 64.33 p 64.70 i ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
Period of Record Statistics
MEAN 65.90 65.59 66.35 68.13 70.43 71.70 72.28 72.53 72.24 71.43 69.53 67.37 69.28
S.D. 1.71 2.16 2.29 1.48 1.64 1.97 1.58 1.38 1.27 1.32 1.76 1.96 1.25
SKEW -1.65 -3.03 -2.92 0.12 -1.04 -3.06 -2.52 -0.52 -1.50 -0.71 -1.98 -1.61 -1.90
MAX 68.65 67.75 69.10 71.67 73.13 74.30 74.52 75.03 74.33 74.03 72.07 71.13 70.86
MIN 59.06 55.43 55.16 64.70 64.58 61.93 65.16 68.97 67.00 67.35 63.07 59.32 64.62
NO YRS 41 40 40 41 41 40 40 40 42 40 39 40 32