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July - September 1998 Weather Data
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Swan Lake Research Farm, Stevens County, MN

(Terms are described on the Weather Page)

Soil Temperatures ( oF)

Air Temp.
( oF) 		Relative Humidity
(%) 		Growing Degree Days 2 Inches 4 Inches
Date Max Min Max Min 50/86 50 40 Precip.
(Inches)
 Max Min Max Min
09/30/98 58.8 36.5 92 51 2518 2538 4275 .28 62.5 48.9 65.3 54.0
09/29/98 71.8 52.4 86 37 2514 2538 4267 .00 75.8 59.1 71.6 61.3
09/28/98 83.7 46.6 89 43 2502 2526 4245 .00 74.9 55.3 70.7 58.4
09/27/98 70.3 49.5 91 39 2485 2511 4220 .00 74.4 58.6 70.8 61.4
09/26/98 80.2 56.0 88 46 2475 2501 4200 .00 78.9 61.4 73.9 62.7
09/25/98 72.0 49.6 87 45 2457 2483 4172 .04 73.0 54.9 68.7 57.7
09/24/98 78.3 43.3 91 39 2446 2472 4151 .04 71.4 51.3 66.9 54.1
09/23/98 67.9 43.2 91 47 2432 2461 4130 .01 62.0 53.0 61.8 56.3
09/22/98 66.9 36.1 90 37 2423 2455 4114 .00 72.2 49.7 68.1 54.2
09/21/98 59.7 39.3 89 44 2415 2453 4102 .00 67.5 53.5 65.1 57.7
09/20/98 62.0 43.7 89 49 2410 2453 4093 .00 73.0 59.8 71.0 64.2
09/19/98 85.1 56.0 85 52 2404 2450 4080 .00 79.7 67.6 76.8 70.7
09/18/98 92.1 60.2 85 41 2383 2429 4049 .00 85.3 65.6 80.3 67.9
09/17/98 86.8 57.0 84 43 2360 2403 4013 .00 83.6 63.4 78.8 66.2
09/16/98 83.5 52.9 80 38 2339 2381 3981 .00 83.8 61.1 78.7 64.6
09/15/98 76.6 48.5 83 37 2321 2363 3953 .00 83.8 61.5 78.9 65.5
09/14/98 78.7 59.3 87 51 2308 2350 3930 .00 82.9 70.5 79.2 72.0
09/13/98 85.4 62.5 84 50 2289 2331 3901 .02 88.4 69.6 83.0 71.7
09/12/98 85.5 63.8 84 50 2265 2307 3867 .00 87.9 69.4 82.8 71.1
09/11/98 88.0 61.9 80 44 2241 2282 3832 .00 86.3 68.1 81.2 70.0
09/10/98 93.8 60.0 70 40 2218 2257 3797 .00 85.7 63.8 80.2 65.9
09/09/98 77.1 54.6 69 39 2196 2230 3760 .00 78.8 61.6 75.0 64.3
09/08/98 70.8 46.1 81 40 2180 2214 3734 .00 81.2 58.7 76.4 62.7
09/07/98 72.4 48.9 83 34 2170 2206 3716 .00 81.2 61.2 77.0 65.0
09/06/98 78.6 54.2 84 36 2159 2195 3695 .00 82.7 68.7 79.1 72.2
09/05/98 88.7 63.3 85 50 2143 2179 3669 .00 90.2 69.0 84.4 70.9
09/04/98 85.1 57.6 83 52 2119 2153 3633 .00 88.1 65.2 82.4 67.7
09/03/98 80.0 55.1 82 42 2098 2132 3602 .00 85.2 62.0 79.8 65.0
09/02/98 73.7 46.1 89 44 2080 2114 3574 .00 79.5 60.2 75.8 64.2
09/01/98 73.5 50.0 86 36 2068 2104 3554 .00 83.0 67.5 79.3 70.5
08/31/98 79.6 57.5 85 47 2056 2092 3532 .00 87.8 67.5 82.5 69.8
08/30/98 80.7 51.3 90 39 2037 2073 3503 .00 88.9 64.4 83.2 67.9
08/29/98 78.9 57.6 87 40 2021 2057 3477 .00 87.1 66.4 82.2 69.3
08/28/98 85.9 55.2 89 43 2003 2039 3449 .00 87.9 66.0 82.7 68.6
08/27/98 80.6 63.9 89 68 1983 2018 3418 .08 81.2 70.0 78.1 71.8
08/26/98 81.7 61.0 89 53 1961 1996 3386 .00 88.4 68.1 83.1 70.6
08/25/98 81.0 56.6 89 47 1940 1975 3355 .00 88.9 64.4 83.2 67.6
08/24/98 78.7 60.1 89 60 1921 1956 3326 .05 84.1 67.9 79.7 70.2
08/23/98 83.1 63.4 88 50 1902 1937 3297 .00 87.6 70.1 83.1 72.2
08/22/98 84.0 61.1 94 68 1879 1914 3264 2.07 83.6 70.7 80.3 72.2
08/21/98 81.1 57.7 90 49 1856 1891 3231 .00 90.0 66.8 84.5 69.9
08/20/98 81.8 57.7 91 48 1837 1872 3202 .01 87.6 69.7 83.2 72.1
08/19/98 91.7 63.4 91 61 1817 1852 3172 .23 90.5 72.7 84.8 73.2
08/18/98 72.9 58.8 92 80 1793 1824 3134 .00 78.3 70.5 79.0 72.5
08/17/98 79.6 61.6 91 52 1777 1808 3108 .00 91.4 71.0 85.9 73.4
08/16/98 87.7 61.5 89 55 1756 1787 3077 .00 89.9 69.9 84.8 71.9
08/15/98 75.7 53.2 92 49 1733 1762 3042 .00 89.3 66.2 83.8 69.8
08/14/98 79.2 57.7 90 44 1719 1748 3018 .00 89.0 73.2 84.6 75.4
08/13/98 84.4 60.2 92 53 1701 1730 2990 .00 93.2 70.6 87.2 72.8
08/12/98 80.1 62.9 86 56 1679 1708 2958 .00 89.0 71.5 84.6 73.8
08/11/98 84.4 59.7 91 51 1658 1687 2927 .00 93.3 70.1 86.9 72.5
08/10/98 86.1 56.2 90 45 1636 1665 2895 .00 91.1 67.8 85.5 71.0
08/09/98 85.0 60.1 91 50 1615 1644 2864 .00 93.5 70.9 87.1 72.7
08/08/98 80.2 60.5 91 64 1592 1621 2831 .04 89.2 70.3 83.7 71.4
08/07/98 74.4 57.1 91 73 1572 1601 2801 .00 80.6 66.9 77.6 69.7
08/06/98 81.4 57.5 91 50 1556 1585 2775 .00 90.9 66.5 84.7 69.1
08/05/98 80.8 61.2 90 56 1537 1566 2746 .00 88.8 66.7 82.0 68.5
08/04/98 79.6 59.6 90 55 1516 1545 2715 .00 83.3 62.8 78.3 64.7
08/05/98 80.8 61.2 90 56 1537 1566 2746 .00 88.8 66.7 82.0 68.5
08/03/98 66.4 60.0 91 85 1496 1525 2685 .02 69.0 65.1 71.6 67.0
08/02/98 77.0 61.4 91 66 1483 1512 2662 .11 81.0 69.0 77.5 71.6
08/01/98 79.3 60.1 84 58 1464 1493 2633 .00 89.2 67.8 83.7 70.2
07/31/98 76.9 53.1 92 50 1444 1473 2603 .00 91.1 63.4 84.1 66.7
07/30/98 75.0 53.6 92 49 1429 1458 2578 .00 85.2 60.8 79.6 64.3
07/29/98 70.4 55.5 93 63 1415 1444 2554 .04 74.8 65.8 78.3 69.1
07/28/98 79.3 59.9 82 43 1402 1431 2531 .00 91.2 70.6 85.9 72.9
07/27/98 80.7 58.0 89 46 1382 1411 2501 .00 91.3 68.2 85.7 71.5
07/26/98 83.6 60.5 92 57 1363 1392 2472 .00 91.6 70.0 85.9 72.5
07/25/98 79.3 56.0 90 51 1341 1370 2440 .00 94.0 66.8 86.7 69.8
07/24/98 76.6 51.3 93 46 1323 1352 2412 .00 90.6 63.7 84.0 67.4
07/23/98 73.1 52.4 90 50 1309 1338 2388 .00 84.9 63.6 80.8 67.5
07/22/98 75.9 57.2 91 49 1296 1325 2365 .00 86.5 67.5 82.2 70.3
07/21/98 76.7 60.3 86 63 1279 1308 2338 .00 84.5 69.3 81.4 72.6
07/20/98 88.0 66.6 91 59 1260 1289 2309 .00 94.4 71.6 87.6 73.5
07/19/98 85.9 58.8 91 52 1234 1262 2272 .00 89.5 67.7 84.4 70.1
07/18/98 79.5 61.8 91 74 1212 1240 2240 .66 81.4 70.4 79.1 72.8
07/17/98 77.9 60.0 90 56 1191 1219 2209 .00 90.2 70.2 84.8 72.3
07/16/98 74.0 54.8 93 52 1172 1200 2180 .00 90.6 66.7 84.8 70.4
07/15/98 81.8 61.1 91 52 1158 1186 2156 .00 88.7 71.0 84.7 73.9
07/14/98 90.2 60.7 93 64 1137 1165 2125 1.92 97.3 75.5 91.1 79.0
07/13/98 93.0 64.2 91 55 1114 1140 2090 .00 97.1 71.4 90.4 73.7
07/12/98 84.7 66.5 89 64 1089 1111 2051 .16 88.1 73.7 84.0 75.5
07/11/98 84.5 66.7 89 57 1063 1085 2015 .00 95.5 74.1 89.3 76.0
07/10/98 85.0 64.9 91 59 1037 1059 1979 .00 95.8 73.3 89.4 75.0
07/09/98 85.1 62.5 91 54 1012 1034 1944 .00 94.7 71.4 87.1 73.1
07/08/98 82.6 62.2 91 58 988 1010 1910 .00 90.9 69.5 84.7 71.2
07/07/98 80.3 63.4 90 60 966 988 1878 .00 85.5 68.8 80.4 69.4
07/06/98 75.5 61.6 91 77 944 966 1846 .00 77.9 68.4 75.0 69.4
07/05/98 73.4 57.6 93 78 925 947 1817 1.41 76.9 68.1 76.7 69.5
07/04/98 75.9 59.2 89 48 909 931 1791 .00 90.1 66.5 83.6 69.0
07/03/98 80.6 59.5 92 63 891 913 1763 .00 87.3 67.7 81.0 69.2
07/02/98 76.3 59.4 93 67 871 893 1733 .00 78.1 68.4 76.7 70.3
07/01/98 81.8 58.7 92 51 853 875 1705 .00 89.4 65.8 82.7 68.0

   
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