RIO PIEDRAS EXP STN, PUERTO RICO

Monthly Average 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 74.57 a 74.30 76.65 77.93 76.55 80.23 80.37 79.97 a 81.05 79.58 78.48 77.19 78.07
1960 75.88 a 76.76 77.06 78.05 79.74 81.20 80.48 f 80.27 80.52 a 79.82 79.35 75.45 a 78.56
1961 75.48 b 74.79 75.68 77.93 a 78.60 79.60 79.40 a 80.21 80.05 79.25 a 76.30 75.68 77.75
1962 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1963 74.71 75.32 75.66 77.22 77.23 79.55 79.92 80.98 80.63 80.75 a 77.75 77.42 78.10
1964 74.69 75.90 76.65 a 76.78 79.35 a 79.63 79.69 80.35 80.48 79.35 77.38 73.55 77.82
1965 71.87 73.48 76.11 75.32 77.27 78.70 79.65 a 79.43 a 79.98 79.34 77.88 75.56 77.05
1966 75.34 74.79 75.94 77.15 78.31 79.42 80.58 81.02 79.70 79.42 76.53 75.38 a 77.80
1967 74.32 74.48 73.56 75.31 a 78.11 80.63 79.55 79.97 80.18 79.77 78.33 a 74.97 77.43
1968 73.55 74.19 73.94 74.62 78.61 79.52 80.02 80.18 80.25 79.85 78.62 b 75.90 77.44
1969 74.32 73.98 77.15 78.87 80.95 82.08 80.87 80.81 80.65 80.40 77.98 75.15 a 78.60
1970 75.71 e 75.04 76.45 77.52 77.92 79.28 79.94 80.27 79.53 79.23 77.27 75.21 77.78
1971 74.32 74.45 75.19 b 76.40 78.16 79.45 80.24 80.19 81.78 79.66 77.66 a 75.27 77.73
1972 74.06 73.97 74.55 76.33 78.34 81.02 80.82 80.32 80.67 81.63 80.08 76.87 78.22
1973 76.84 76.07 77.73 78.70 81.11 80.68 80.94 80.74 81.45 80.45 78.58 75.40 79.06
1974 73.97 75.14 75.06 76.33 78.79 80.03 81.02 79.24 79.17 78.47 76.68 75.32 77.44
1975 73.58 74.09 74.44 75.32 77.40 79.10 80.03 79.84 79.47 78.05 76.42 74.13 76.82
1976 72.53 72.78 74.81 76.45 78.06 78.77 d 79.28 b 80.23 79.63 78.95 78.40 74.90 77.07
1977 74.22 a 75.18 75.21 75.55 78.16 79.98 80.53 79.92 79.62 79.94 78.37 76.81 77.79
1978 74.95 75.66 76.61 77.15 78.85 79.78 79.98 79.90 80.25 80.00 c 77.53 75.92 a 78.05
1979 74.34 74.62 74.17 b 76.63 78.21 80.15 80.98 80.50 80.19 a 81.20 a 78.12 a 75.74 77.91
1980 75.19 75.34 75.73 77.67 81.29 82.43 81.27 81.94 80.95 81.34 78.62 76.73 79.04
1981 75.73 75.68 77.19 77.67 80.19 80.55 81.05 81.52 81.23 81.03 79.15 76.82 78.98
1982 75.23 74.96 75.18 76.78 78.16 80.68 80.00 80.21 80.47 80.50 77.53 74.60 77.86
1983 75.08 75.93 78.35 78.17 79.98 82.13 81.82 80.72 a 81.02 80.02 78.05 75.55 78.90
1984 73.98 74.93 76.02 78.63 77.92 79.98 79.95 80.31 79.70 79.63 76.90 74.58 77.71
1985 ----- z 74.20 74.40 75.37 78.18 80.93 81.42 81.35 80.88 78.52 77.55 75.10 77.99
1986 74.37 74.36 76.32 78.08 78.34 80.47 80.87 80.87 81.30 79.77 78.07 75.98 78.23
1987 75.42 75.62 76.45 80.17 80.16 81.33 81.50 g 82.92 82.70 81.87 80.05 78.52 c 79.57
1988 75.44 75.57 76.77 78.53 80.77 82.50 81.87 81.16 81.27 80.53 78.68 75.31 79.03
1989 74.45 74.77 b 75.10 76.93 79.19 78.93 80.95 81.21 81.21 a 80.63 78.72 76.77 78.24
1990 75.74 74.71 74.85 76.90 80.35 81.53 81.60 82.42 82.20 81.44 80.50 76.13 79.03
1991 75.34 76.11 76.75 a 76.55 79.39 81.50 81.56 f 82.71 81.55 81.10 78.57 75.18 78.61
1992 74.69 76.00 76.90 78.83 79.00 ----- z 81.42 82.02 81.43 81.48 f 78.18 ----- z 78.72
1993 75.39 75.00 75.06 77.97 78.21 80.25 79.21 80.15 78.50 d 78.92 75.68 74.84 77.43
1994 74.00 73.75 75.94 75.97 77.35 76.32 77.34 80.18 80.08 78.89 75.50 73.19 76.54
1995 72.26 70.82 69.58 78.23 80.29 80.73 81.95 ----- z 81.21 b 79.84 79.20 77.73 77.44
1996 76.48 75.53 77.08 76.90 78.27 79.70 79.82 a 80.37 81.10 a 80.65 78.02 74.73 78.22
1997 74.66 75.61 75.68 78.40 a 80.34 82.63 81.13 81.82 82.40 80.95 ----- z 79.44 79.37
1998 77.85 77.55 77.82 78.77 80.61 ----- z 82.29 b 82.73 82.32 e 81.84 ----- z 78.03 79.98
1999 76.24 73.91 75.89 77.90 81.77 81.20 81.10 81.94 81.80 80.45 ----- z ----- z 79.22
2000 ----- z ----- z ----- z ----- z ----- z 81.70 82.48 ----- z 81.95 81.42 78.23 77.68 a 80.58
2001 76.77 75.95 q 77.82 f 77.83 81.10 81.55 81.90 a 82.44 81.84 a 81.92 l 78.50 77.66 79.96
2002 76.55 ----- z ----- z 77.05 s 80.10 j 81.53 l 81.97 p 82.75 k 82.29 k 81.37 h 80.13 o 77.85 r 76.55
2003 77.10 p 77.25 j 79.12 k 79.29 m 80.05 j 80.80 j 81.57 p 81.12 j 82.50 k 81.64 j ----- z 77.07 q 9999.00
2004 74.83 s 76.19 p 76.05 i 77.78 l 78.08 m 81.32 j 80.61 v 81.63 l 81.94 n 79.77 p 77.73 s 76.46 r 9999.00
2005 74.36 t 71.83 j 77.56 o 80.05 k 80.22 m 82.06 m 81.47 p 81.90 k 83.03 m 81.00 l 79.18 m 75.67 y 9999.00
2006 74.80 p 75.47 j 76.41 i 77.53 o 79.95 k 81.24 i 80.50 s 81.22 h 81.66 k 81.45 k 78.73 q 76.95 t 9999.00
2007 75.56 o 77.05 i 77.53 l ----- z 81.55 l 81.53 k 81.67 y 82.04 q 81.80 t 80.43 j 78.41 n 75.50 r 9999.00
2008 73.97 p 74.50 j 75.05 l ----- z ----- z 80.21 p 80.88 r 81.89 q 81.32 k 80.00 m 77.77 s 74.73 t 9999.00
2009 75.47 p 74.24 i 73.83 p 76.50 n 78.14 m 80.47 k 82.21 s 80.86 x 80.85 m 80.65 n 78.16 n 77.20 u 9999.00
2010 75.08 r 77.53 j 78.50 q 79.00 m 79.72 o 80.82 k 81.12 w 81.80 k 80.60 j 79.95 k 77.12 n 74.84 o 9999.00
2011 74.46 q 74.16 i 74.36 j 76.16 n 77.60 k 80.50 i 79.58 s 80.92 r 80.39 k 80.08 l 78.53 m 75.43 p 9999.00
2012 73.70 p 74.60 i ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
Period of Record Statistics
MEAN 74.88 74.88 75.74 77.26 79.04 80.40 80.60 80.83 80.77 80.11 78.04 75.91 77.97
S.D. 1.21 1.13 1.50 1.22 1.31 1.26 1.02 0.96 0.96 0.97 1.11 1.34 0.67
SKEW -0.15 -0.93 -1.76 -0.18 0.34 -0.69 -0.80 0.74 -0.30 0.14 0.05 0.46 0.43
MAX 77.85 77.55 78.35 80.17 81.77 82.63 82.48 82.92 82.70 81.87 80.50 79.44 79.06
MIN 71.87 70.82 69.58 74.62 76.55 76.32 77.34 79.24 78.50 78.05 75.50 73.19 76.54
NO YRS 41 40 40 41 41 40 39 40 42 40 39 40 31