For monthly and annual means, thresholds, and sums:
 Months with  5 or more missing   days are not considered
 Years  with  1 or more missing months are not considered

Station:(105685) MAY                      
From Year=1948 To Year=1989                                   #Day-Max #Day-Min
       Averages         Daily Extremes         Mean Extremes   >=   =<   =<  =<
    Max  Min Mean  High---Date  Low---Date   High-Yr  Low-Yr   90   32   32   0
-------------------------------------------------------------------------------
Ja 30.4  6.3 18.4  56  13/1953 -39  25/1949  32.4 53 -1.9 49  0.0 16.4 30.2 10.1
Fe 38.7 12.6 25.7  64  26/1950 -35  01/1956  35.7 63 15.4 56  0.0  6.1 27.2  4.4
Ma 47.2 20.6 33.9  77  30/1978 -20  01/1960  42.0 86 23.5 52  0.0  1.7 29.3  0.7
Ap 58.1 27.3 42.7  83  24/1977   8  19/1966  49.3 87 36.2 70  0.0  0.0 22.9  0.0
Ma 67.5 34.7 51.1  94  30/1986  12  01/1954  56.2 58 46.0 59  0.2  0.0 11.2  0.0
Jn 76.4 41.4 58.9  99  18/1988  23  03/1951  66.4 88 53.4 51  2.3  0.0  2.3  0.0
Jl 85.9 45.6 65.7 101  10/1973  26  05/1955  70.6 85 62.3 55  9.7  0.0  0.2  0.0
Au 84.5 44.1 64.3 101  03/1961  27  18/1978  68.9 61 60.5 76  8.1  0.0  0.6  0.0
Se 74.6 36.1 55.3  95  02/1978  12  29/1985  61.5 79 47.8 65  1.2  0.0  8.9  0.0
Oc 62.4 27.6 45.0  85  01/1979  -1  29/1971  52.6 88 40.1 49  0.0  0.1 22.9  0.0
No 44.0 18.6 31.3  71  01/1965 -24  24/1985  36.5 65 23.3 85  0.0  3.4 27.4  1.2
De 32.2  9.1 20.6  59  06/1987 -40  23/1983  29.5 80  8.6 85  0.0 14.4 30.3  7.1
An 58.5 27.0 42.7 101 19610803 -40 19831223  45.4 81 39.8 55 21.4 42.0213.5 23.5
Wi 33.8  9.3 21.6  64 19500226 -40 19831223  28.6 81  9.4 49  0.0 36.9 87.8 21.6
Sp 57.6 27.5 42.6  94 19860530 -20 19600301  46.9 87 38.1 55  0.2  1.7 63.5  0.7
Su 82.3 43.7 63.0 101 19610803  23 19510603  66.7 61 59.9 51 20.0  0.0  3.1  0.0
Fa 60.3 27.4 43.9  95 19780902 -24 19851124  47.7 63 38.8 85  1.2  3.5 59.2  1.2
Station:(105685) MAY                       From Year=1948 To Year=1989
Missing data not yet determined
       Total Precipitation       Precipitation  Total Snowfall  #Days Precip >=
    Mean   High--Yr    Low--Yr     1-Day Max    Mean   High-Yr .01 .10 .50 1.00"
-------------------------------------------------------------------------------
Ja  0.45   1.17  65   0.00  81   0.50  27/1954   5.3  15.2  56   5   2   0   0
Fe  0.30   1.53  86   0.00  64   0.55  18/1986   3.0  12.1  58   4   1   0   0
Ma  0.30   1.04  58   0.00  65   0.42  28/1960   2.2  14.5  58   4   1   0   0
Ap  0.55   1.50  76   0.00  62   0.66  01/1963   1.1   8.5  58   4   2   0   0
Ma  1.25   2.95  80   0.06  54   1.21  15/1952   0.4   7.5  61   7   4   0   0
Jn  1.42   4.17  64   0.00  88   1.45  02/1953   0.0   0.0  49   8   5   1   0
Jl  0.75   2.53  84   0.00  88   1.12  10/1983   0.0   0.0  49   5   2   0   0
Au  0.74   2.51  68   0.00  55   0.86  05/1950   0.0   0.5  51   5   2   0   0
Se  0.74   1.91  59   0.00  87   0.92  23/1968   0.0   0.8  50   5   3   0   0
Oc  0.41   1.52  67   0.00  54   0.61  15/1972   0.2   2.5  85   4   2   0   0
No  0.53   2.14  68   0.00  69   1.10  10/1970   2.6  20.9  85   4   2   0   0
De  0.53   2.37  64   0.00  62   0.82  23/1955   5.3  20.9  83   5   2   0   0
An  7.96  11.85  84   4.46  74   1.45 19530602  20.2  43.4  85  59  26   2   0
Wi  1.27   3.56  65   0.28  87   0.82 19551223  13.5  33.0  78  13   5   0   0
Sp  2.09   4.01  81   0.42  66   1.21 19520515   3.8  23.0  58  16   7   1   0
Su  2.91   7.32  84   0.00  88   1.45 19530602   0.0   0.5  51  17   9   1   0
Fa  1.68   4.01  68   0.46  52   1.10 19701110   2.8  23.4  85  13   6   0   0