December, 1998 Preliminary Local Climatological Data Rochester, MN National Weather Service |-Temperature-|--------Degree Days---------|-Precipitation-|-Snowfall-|----Wind----| (degrees F) (base 65 degrees F) (inches) (inches) (mph, deg) Heating Cooling Max Min Avg Dep HDD Seas Dep CDD Seas Dep Tot Tot Norm Tot Tot Avg Pk Dir from for for for for for Spd Gust at Norm Seas Seas Mon Mon Seas Pk Date | | | | | | | | | | | | | | | | | | 1 62 34 48 24 17 1447 -330 0 527 55 0 0 0.04 0 2.0 19.9 39 210 2 58 42 50 27 15 1462 -357 0 527 55 0 0 0.08 0.0 2.0 12.2 22 220 3 53 38 46 23 19 1481 -380 0 527 55 0 0 0.12 0.0 2.0 9.2 22 220 4 56 38 47 25 18 1499 -405 0 527 55 0 0 0.16 0.0 2.0 9.6 20 170 5 58 34 46 24 19 1518 -429 0 527 55 T T 0.20 0.0 2.0 12.9 23 320 6 34 22 28 7 37 1555 -436 0 527 55 0 T 0.24 0 2.0 13.1 26 310 7 36 18 27 6 38 1593 -442 0 527 55 0 T 0.28 0.0 2.0 5.9 15 240 8 44 24 34 14 31 1624 -456 0 527 55 0 T 0.32 0.0 2.0 11.0 18 230 9 45 21 33 13 32 1656 -469 0 527 55 0 T 0.36 0.0 2.0 M 21 290 10 38 22 30 11 35 1691 -480 0 527 55 0 T 0.40 0.0 2.0 11.8 20 240 11 48 25 37 18 28 1719 -498 0 527 55 0 T 0.43 0.0 2.0 16.9 34 230 12 48 23 36 18 29 1748 -516 0 527 55 0 T 0.46 0 2.0 5.4 14 220 13 51 28 40 22 25 1773 -538 0 527 55 0 T 0.49 0.0 2.0 6.0 11 190 14 52 27 40 23 25 1798 -561 0 527 55 0 T 0.52 0.0 2.0 18.5 36 220 15 43 28 36 19 29 1827 -580 0 527 55 0 T 0.55 0.0 2.0 13.5 26 230 16 35 22 29 12 36 1863 -592 0 527 55 0.02 0.02 0.58 0.2 2.2 9.4 18 350 17 28 16 22 6 43 1906 -598 0 527 55 0 0.02 0.61 0.0 2.2 10.8 30 140 18 36 25 31 15 34 1940 -613 0 527 55 0 0.02 0.64 0 2.2 17.8 31 160 19 25 9 17 1 48 1988 -614 0 527 55 T 0.02 0.67 T 2.2 14.1 28 320 20 16 -1 8 -7 57 2045 -607 0 527 55 0.08 0.10 0.70 2.5 4.7 9.2 22 320 21 2 -7 -3 -18 68 2113 -589 0 527 55 T 0.10 0.73 T 4.7 15.5 25 320 22 9 -11 -1 -16 66 2179 -573 0 527 55 T 0.10 0.76 T 4.7 16.2 32 310 23 12 3 M M 57 2295 -508 0 527 55 0 0.10 0.79 0 4.7 13.4 24 280 24 16 2 9 -5 56 2293 -559 0 527 55 0 0.10 0.82 0 4.7 12.2 22 270 25 28 10 19 5 46 2339 -564 0 527 55 T 0.10 0.85 T 4.7 15.7 29 320 26 23 0 12 -1 53 2392 -563 0 527 55 0.06 0.16 0.88 1.3 6.0 12.7 33 180 27 28 11 20 7 45 243 7 0 527 55 0 0.16 0.91 0.0 6.0 15.1 32 290 28 37 9 23 10 42 2479 -582 0 527 55 0.12 0.28 0.94 1.2 7.2 18.5 39 190 29 34 -10 12 -1 53 2532 -581 0 527 55 T 0.28 0.97 T 7.2 20.9 43 340 30 3 -12 -5 -18 70 2602 -563 0 527 55 0.01 0.29 1.00 0.1 7.3 5.3 13 290 31 7 -4 2 -10 63 2665 -553 0 527 55 T 0.29 1.03 T 7.3 10.4 18 310 Monthly Summary for December TEMPERATURE DATA...... (DEGREES F) AVERAGE MONTHLY TEMPERATURE.... 24.7 OR 7.5 DEGREES ABOVE NORMAL AVERAGE MAXIMUM TEMPERATURE.... 34.4 AVERAGE MINIMUM TEMPERATURE.... 15.7 HIGHEST TEMPERATURE WAS 62 ON DAY 1 LOWEST TEMPERATURE WAS -11 ON DAY 22 HEATING DEGREE DAYS (BASE 65) COOLING DEGREE DAYS MONTHLY TOTAL ........... 1234 MONTHLY TOTAL .......... 0 DEPARTURE FROM NORMAL.... -248 DEPARTURE FROM NORMAL... 0 SEASONAL TOTAL (JUL-JUN). 2665 SEASONAL TOTAL (JAN-DEC) 527 DEPARTURE FROM NORMAL.... -553 DEPARTURE FROM NORMAL... 55 PRECIPITATION DATA.... ..RAIN.. TOTAL FOR THE MONTH......... 0.29 OR 0.74 INCHES BELOW NORMAL TOTAL SINCE JANUARY 1ST..... 32.14 OR 2.48 INCHES ABOVE NORMAL GREATEST 24 HOUR PRECIPITATION WAS 0.12 INCHES ON DAY(S) 28 ..SNOW.. TOTAL FOR THE MONTH......... 5.3 TOTAL FOR THE SEASON........ 7.3 GREATEST 24 HOUR SNOWFALL WAS 2.5 INCHES ON DAY(S) 20 ..NUMBER OF DAYS.. WITH .01 INCHES OR MORE 5 HIGHS 32 DEGREES OR COLDER 12 WITH .10 INCHES OR MORE 1 HIGHS 90 DEGREES OR WARMER 0 WITH .50 INCHES OR MORE 0 LOWS 32 DEGREES OR COLDER 26 WITH 1.00 INCHES OR MORE 0 LOWS 0 DEGREES OR COLDER 7 SEA LEVEL PRESSURE............ HIGHEST 30.60 INCHES ON DAY 22 LOWEST 29.53 INCHES ON DAY 18 WIND DATA............. THE AVERAGE MONTHLY WIND SPEED WAS 12.7 MPH THE FASTEST TWO-MINUTE WIND WAS... 37 MPH FROM 340 DEGREES THE HIGHEST PEAK WIND GUST WAS.... 43 FROM 340 DEGREES