CHATHAM, MA

Total of Precipitation (Inches)

(191386)

File last updated on September 23, 2020
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)JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECANN
1972-----z-----z-----z-----z-----z-----z-----z1.43 10.84 3.55 4.98 6.73 27.53g
19731.85 3.82 3.11 5.93 3.29 5.20 9.05 2.91 4.02 6.77 3.24 5.19 54.38
19744.54 4.22 1.75 4.31 4.14 3.57 0.87 3.62 4.56 2.22 3.16 3.54 40.50
19756.49 3.88 4.42 3.82 1.76 2.36 3.22 4.18 5.56 5.01 6.49 7.67 54.86
19766.87 2.77 3.20 2.11 1.65 1.19 4.59 2.35 2.45 7.12 1.97 4.48 40.75
19775.92 2.29 3.89 3.78 2.36 7.30 1.33 2.93 6.50 4.96 2.04 8.55 51.85
19786.78 1.45 3.00 2.67 5.77 2.51 4.14 3.46 1.85 2.64 2.41 5.20 41.88
19796.57 5.71 2.66 3.43 5.93 1.42 1.00 5.02 2.15 3.72 4.22 3.52 45.35
19804.71 1.21 5.32 3.47 2.40 3.07 1.56 2.23 2.39 2.91 4.04 5.25 38.56
19812.00 5.80 1.36 3.63 3.35 5.12 2.99 2.08 4.09 3.79 3.94 8.06 46.21
19824.33 16.58 3.43 4.07 2.06 5.49 1.58 3.64 6.80 6.30 4.65a3.19 62.12
19832.67 6.40 9.84 7.64 4.87 2.91 1.51 5.29 0.80a5.38 4.38 4.29 55.98
19842.57 5.76 7.50 3.16 5.40 3.88 7.97 1.49 1.68 4.95 1.06 3.19 48.61
19851.61 2.74 4.33 -----z5.51 6.81 2.76 7.80 2.39 2.15 4.24 1.53 41.87a
19862.44 3.15 3.08 2.03 1.85 3.34 9.93 -----z-----z-----z-----z-----z25.82e
19875.93 4.13 4.41 7.26 4.35 1.45 1.33 -----z7.42 2.60 -----z4.34 43.22b
19883.00 4.99 2.91 2.09 2.36 2.31 4.46 1.04 1.28 6.09 8.13 1.35 40.01
19891.63 3.47 3.73 5.73 -----z3.48 5.56 1.67 4.54 5.10 4.59 1.78 41.28a
19905.36 4.21 2.92a3.93 7.09 2.71 4.31 0.94 2.08 3.41 1.61 3.74 42.31
19913.10 2.35 4.73 3.81 1.53 1.90 -----z3.44 4.83 4.62 4.93 3.02 38.26a
1992-----z2.21 3.46 2.48 1.64 4.27 2.84 -----z2.03 1.29 -----z7.22 27.44c
19931.98 3.92 5.98 4.48 1.85 2.40 2.39 0.26 3.54 4.70 3.10 7.66 42.26
19945.35 3.05 7.35 4.10 5.02 1.88 1.18 4.81 4.10 1.69 2.67 5.98 47.18
1995-----z2.86 -----z-----z3.84 3.76 2.00 1.82 2.50 4.91 6.74 2.46 30.89c
19967.01 3.74 2.65 5.65 2.91 3.11 2.49 7.17 11.91 6.27 1.30 4.95 59.16
19972.83 2.88 1.98 7.52 3.23 3.12 3.05 4.48 2.09 2.75 5.77 5.37 45.07
199811.27 8.35 5.99 4.39 2.27 5.58 3.36 3.95 2.67 3.16 1.69 0.94 53.62
19993.93 4.16 -----z1.40 5.74 0.30 2.07 3.67 4.94 6.47 2.00 5.27 39.95a
20004.23 3.19 4.86 5.29 2.69 2.05 4.62 5.19 -----z2.55 3.96 -----z38.63b
20013.79 3.09 10.41 2.80 2.41 4.61 5.12 5.99 0.68 1.67 1.00 3.35 44.92
20024.67 2.18 5.75 -----z4.02 3.40 0.49 2.52 6.87 1.92 7.93 6.62 46.37a
20032.52 7.70 6.41 4.26 2.27 5.62 1.85 3.35 3.88 4.90 3.49 5.07 51.32
20041.71 3.72 3.00 7.03 2.78 1.71 2.24 1.47 -----z1.83 4.74 4.33 34.56a
20054.69 2.02a4.60 3.68 7.03 0.04 3.83 0.89 3.88 6.46b3.78 4.27 45.17
20064.62 1.55 0.74 2.67 7.01 11.71 2.65 2.08 2.25 2.46 6.46 3.32 47.52
20073.81 1.49 4.01 7.90 2.98 0.70 2.79 1.12 2.91 1.75 7.68 5.21 42.35
20083.40 4.79 4.63 3.72 5.49 1.86 3.30 2.03 7.54 2.62 4.36 5.77 49.51
20094.29 2.19 3.84 2.89m2.54 3.43 6.62 5.49 2.16 6.94 2.25 5.16a44.91a
20104.05 3.74 7.94a1.44 2.80 2.23a2.95 4.99 4.83 5.54 3.38 5.10 48.99
20115.07 3.57 1.82 4.33 2.07 3.35 4.86 3.58 2.05 7.75 4.29 2.52 45.26
20123.56 1.68 1.52 1.18 4.36 1.99 2.53 2.63 3.98 2.48 2.37 5.58 33.86
20131.60 7.01 4.95 3.68 4.34 7.20 4.36 1.22 1.72 0.95h4.33 3.91 44.32a
20143.60 6.37 3.04 2.28 1.85 2.62 3.52 2.57 1.73 4.98 8.73 6.85 48.14
20154.40 3.92 4.71a1.26 0.91 3.31 1.98 3.42 2.17 6.98 5.98 5.14 44.18
20165.04 6.62 3.48 4.61 3.58 0.82 2.71 0.97 2.30 7.55 1.73 2.02 41.43
20174.45 3.37 3.41 5.33 4.83 2.74 2.09 6.24 6.34 5.35 1.80 2.51 48.46
20183.84 6.47 7.27d3.01 1.73 3.60 1.12 1.63 3.29 7.01 7.73 3.89 50.59
20194.57 2.53 3.83 5.53 3.80 5.83 1.99 1.51 4.94 5.73 3.42 7.93 51.61
20201.56 3.80 2.43 5.85 1.43 0.62a0.78 1.38 1.45g-----z-----z-----z17.85d
Period of Record Statistics
MEAN4.13 4.11 4.25 4.06 3.47 3.33 3.19 3.09 3.86 4.37 4.06 4.63 47.18
S.D.1.88 2.52 2.09 1.76 1.65 2.14 2.06 1.80 2.43 1.91 2.04 1.89 6.11
SKEW1.14 2.70 1.02 0.45 0.62 1.43 1.46 0.68 1.40 0.06 0.56 0.13 0.33
MAX11.27 16.58 10.41 7.90 7.09 11.71 9.93 7.80 11.91 7.75 8.73 8.55 62.12
MIN1.56 1.21 0.74 1.18 0.91 0.04 0.49 0.26 0.68 1.29 1.00 0.94 33.86
YRS46 48 46 44 47 48 47 46 45 46 45 46 34