Normals for Ishpeming MI
TEMPERATURE SUMMARY
Station: (204127) ISHPEMING Missing Data: 11%
Averages: 1961-1990 Extremes: 1948-1987 #Day-Max #Day-Min
Averages Daily Extremes Mean Extremes => <= <= <=
Max Min Mean High---Date Low---Date High-Yr Low-Yr 90 32 32 0
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Ja 21.9 4.6 13.5 56 26/1973 -30 09/1977 22.5 64 5.5 77 0 26 30 10
Fe 26.7 6.9 17.0 61 24/1976 -34 17/1979 26.8 84 8.8 63 0 20 27 8.5
Ma 37.0 16.1 26.8 71 29/1981 -22 03/1972 35.2 73 17.4 60 0 12 28 4.0
Ap 51.0 28.4 39.9 88 22/1980 -4 07/1982 46.6 55 29.7 50 0 1.7 20 0.1
Ma 65.0 39.5 52.5 95 28/1969 17 06/1954 62.0 77 45.7 54 0.2 0.1 8.6 0
Jn 73.6 48.5 61.3 98 12/1956 28 03/1982 65.8 76 55.1 69 0.4 0 0.8 0
Jl 78.8 54.4 66.8 99 31/1975 31 05/1979 72.2 83 62.2 56 1.4 0 0 0
Au 75.9 52.6 64.5 96 24/1948 31 15/1979 70.0 83 58.3 50 0.9 0 0.1 0
Se 66.6 45.4 56.3 97 07/1976 21 23/1981 60.1 48 51.0 65 0.2 0 2.1 0
Oc 55.3 36.4 46.0 86 10/1955 12 18/1976 56.2 63 40.5 87 0 0.2 11 0
No 38.9 24.7 32.0 73 03/1978 -12 29/1976 37.4 63 23.2 59 0 8.6 24 0.5
De 26.1 11.7 19.1 58 03/1982 -24 19/1983 25.9 74 10.5 83 0 22 29 5.4
An 51.7 31.0 41.6 99 07/31/75 -34 02/17/79 47.7 87 38.7 50 3.1 90 182 29
Wi 24.8 7.7 16.5 61 02/24/76 -34 02/17/79 23.0 87 11.2 63 0 68 87 24
Sp 51.0 28.0 39.7 95 05/28/69 -22 03/03/72 47.2 77 33.1 50 0.2 14 57 4.1
Su 76.1 51.9 64.3 99 07/31/75 28 06/03/82 68.3 83 60.9 50 2.7 0 0.9 0
Fa 53.6 35.6 44.8 97 09/07/76 -12 11/29/76 50.2 63 40.5 51 0.2 8.9 37 0.5
PRECIPITATION SUMMARY
Station: (204127) ISHPEMING Missing Data: 11%
Averages: 1961-1990 Extremes: 1948-1987
Total Precipitation Snow #Days Precip
Mean High--Yr Low--Yr 1-Day Max Mean High--Yr =>.10 =>.50 =>1.
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Ja 1.62 5.28 71 0.25 57 1.34 4/1971 25.3 66.5 71 5.0 0.4 0.1
Fe 1.32 3.45 71 0.19 82 1.63 12/1965 20.4 43.5 71 3.9 0.3 0.0
Ma 1.98 4.16 77 0.30 80 1.55 12/1977 19.9 42.0 72 5.0 0.9 0.3
Ap 2.45 6.17 85 0.42 49 2.88 19/1985 6.8 27.0 50 6.2 1.6 0.3
Ma 3.04 6.59 70 0.05 86 2.60 20/1975 1.1 14.5 60 6.6 2.2 0.6
Jn 3.40 8.51 51 0.66 70 2.01 20/1972 0.0 0.0 0 7.8 2.2 0.6
Jl 3.28 11.72 49 0.63 81 5.35 29/1949 0.0 0.0 0 6.8 2.5 0.8
Au 3.34 7.48 51 0.35 70 3.75 28/1960 0.0 0.0 0 6.4 2.3 0.9
Se 3.80 7.75 68 0.95 52 4.11 11/1978 0.1 2.0 74 7.9 2.5 0.5
Oc 3.11 6.07 67 0.64 56 2.90 5/1985 3.1 15.4 79 6.7 1.6 0.6
No 2.26 4.98 85 0.53 81 1.94 2/1985 15.4 42.5 56 6.7 1.3 0.2
De 1.93 4.00 68 0.45 60 1.10 2/1985 27.9 63.1 68 5.6 0.5 0.0
An 31.36 43.55 51 21.26 76 5.35 7/29/49 118.3 193.5 71 75.8 18.5 4.9
Wi 4.81 10.97 71 2.13 61 1.63 2/12/65 72.9 151.6 69 14.6 1.2 0.1
Sp 7.47 12.66 60 4.04 58 2.88 4/19/85 27.8 60.0 72 18.0 4.8 1.2
Su 10.01 21.37 51 4.94 76 5.35 7/29/49 0.0 0.0 0 21.0 6.9 2.2
Fa 9.15 14.80 85 3.20 52 4.11 9/11/78 18.7 42.5 56 21.7 5.4 1.3
HEATING AND COOLING DEGREE DAY SUMMARY
Station: (204127) ISHPEMING Missing Data: 10.9%
Degree Days to Selected Base Temperatures (F)
Base Heating Degree Days
Below Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
65 1604 1360 1187 750 412 164 61 98 288 588 996 1426 8934
60 1449 1219 1033 605 284 79 18 37 173 442 846 1271 7456
57 1356 1134 940 521 218 45 7 16 117 360 756 1178 6648
55 1294 1078 878 466 177 28 3 8 86 307 696 1117 6138
50 1139 937 725 335 94 6 0 1 33 192 548 962 4972
Base Cooling Degree Days
Above Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
55 0 0 0 12 92 210 361 296 116 26 0 0 1113
57 0 0 0 8 70 167 303 242 88 17 0 0 895
60 0 0 0 4 44 111 222 169 55 9 0 0 614
65 0 0 0 1 16 46 110 76 22 2 0 0 273
70 0 0 0 0 5 13 40 23 7 0 0 0 88
Derived from the 1961-1990 Data
GROWING DEGREE DAY SUMMARY
Station: (204127) ISHPEMING Missing Data: 10.9%
Growing Degree Days to Selected Base Temperatures (F)
Base Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
40 M 0 1 13 115 392 632 821 752 476 221 29 2 3454
S 0 1 14 129 521 1153 1974 2726 3202 3423 3452 3454
45 M 0 0 3 61 264 482 667 597 335 128 9 1 2547
S 0 0 3 64 328 810 1477 2074 2409 2537 2546 2547
50 M 0 0 1 30 163 337 513 444 211 64 2 0 1765
S 0 0 1 31 194 531 1044 1488 1699 1763 1765 1765
55 M 0 0 0 13 92 210 361 296 117 27 0 0 1116
S 0 0 0 13 105 315 676 972 1089 1116 1116 1116
60 M 0 0 0 4 44 111 222 170 55 9 0 0 615
S 0 0 0 4 48 159 381 551 606 615 615 615
Modified Growing Degree Days
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
50 M 0 1 10 84 253 394 528 471 274 123 15 0 2153
S 0 1 11 95 348 742 1270 1741 2015 2138 2153 2153
Derived from the 1961-1990 Data
M = Monthly Data S = Running Sum of Monthly Data
GROWING SEASON SUMMARY
Growing Season Summary
Station: (204127) ISHPEMING
Years: 1961 To 1990 Missing Data: 10.7%
Base Date of Last Spring Occurrence Date of First Fall Occurrence
Temp Median Early 90% 10% Late #yrs Median Early 10% 90% Late #yrs
32 5/31 5/11 5/17 6/16 7/04 27 9/18 8/14 9/05 10/05 10/14 27
30 5/22 5/09 5/10 6/05 6/14 27 9/26 9/03 9/10 10/09 10/17 27
28 5/14 4/25 5/07 5/29 6/03 27 10/07 9/03 9/23 10/24 10/31 27
24 5/04 4/14 4/18 5/18 5/22 27 10/18 9/22 9/30 11/03 11/05 27
20 4/21 4/04 4/06 5/07 5/10 27 11/05 10/10 10/19 11/15 11/22 27
16 4/10 3/23 3/27 4/21 4/26 27 11/13 10/19 10/30 11/25 12/09 26
Base Length of Season (Days)
Temp Median Shortest 10% 90% Longest #yrs
32 113 41 84 127 147 27
30 126 101 104 147 151 27
28 142 106 127 167 171 27
24 165 127 149 186 187 27
20 195 173 178 214 224 27
16 216 199 200 237 242 26
