..TWIN CITIES CLIMATOLOGICAL REVIEW OF...1999...
...TEMPERATURES... 1999 .. 30YR
ACTUAL .. NORMAL
AVERAGE ANNUAL MEAN ................... 47.9 .. 44.8
AVERAGE DAILY MAXIMUM ................. 57.2 .. 54.3
AVERAGE DAILY MINIMUM ................. 38.6 .. 35.3
HEATING DEGREE DAYS..CALENDAR YEAR..... 6890 ... 7981
COOLING DEGREE DAYS.................... 766 ... 682
COLDEST MONTH LAST YEAR ............... 12.3 JAN
WARMEST MONTH LAST YEAR ............... 76.2 JUL
HIGHEST DAILY ........................ 99 JUL 25
LOWEST DAILY ......................... -22 JAN 9
LAST SPRING FREEZE.. 32 OR LOWER....... 30 ON APR 24/ AVERAGE = MAY 1
GROWING SEASON ....................... 176 DAYS / AVERAGE = 159 DAYS
FIRST AUTUMNAL FREEZE.. 32 OR LOWER.... 32 ON OCT 17/ AVERAGE = OCT 5
LAST ZERO DEGREES.. OR LOWER ......... -2 JAN 19
FIRST ZERO DEGREES.. OR LOWER ......... -3 DEC 20
...PRECIPITATION.../...INCHES... 1999 .. 30YR
ACTUAL .. NORMAL
TOTAL FOR THE YEAR..................... 30.56 .. 28.32
MAXIMUM MONTHLY........................ 6.57 MAY
LEAST MONTHLY.......................... 0.33 DEC
GREATEST 24HR.......................... 2.16 JUL 26
...SNOWFALL.../...INCHES... 1999 30YR
ACTUAL .. AVERAGE
TOTAL FOR THE CALENDAR YEAR.. 1999..... 61.3 .. 55.5
TOTAL SEASONAL.. 1998-99............... 56.5 .. 56.5
LAST.. TRACE OR MORE .................. T APR 23
FIRST.. TRACE OR MORE ................. T OCT 19
LAST 0.1 INCH OR MORE (MEASURABLE)..... 3.5 MAR 9
FIRST 0.1 INCH OR MORE (MEASURABLE).... 0.7 NOV 23
LAST 1.0 INCH OR MORE ................ 3.5 MAR 9
FIRST 1.0 INCH OR MORE ................ 2.3 DEC 19
GREATEST DAILY SNOWFALL ............... 12.5 MAR 8
...NUMBER OF DAYS WITH ... 1999 .. 30YR
ACTUAL .. AVERAGE
MAXIMUM OF.. 90 DEGREES OR HIGHER ..... 18 .. 14
MAX OF.. 80 " ..... 63 .. 68
MAX OF.. 70 " ..... 126 .. 128
MAX OF.. 60 " ..... 183 .. 173
MAX OF.. 50 DEGREES OR HIGHER ..... 230 .. 211
MAXIMUM OF.. 32 DEGREES OR LOWER ..... 50 .. 76
MINIMUM OF.. 32 DEGREES OR LOWER ...... 135 .. 155
MIN OF.. 20 " " " ...... 66 .. 90
MIN OF.. 10 " " " ...... 32 .. 53
MIN OF.. 0 " " " ...... 20 .. 30
MIN OF..-10 DEGREES OR LOWER ...... 6 .. 12
MINIMUM OF.. 50 DEGREES OR HIGHER...... 121 .. 123
THUNDERSTORMS 39 .. 38
FIRST THUNDERSTORM MAR 28
LAST THUNDERSTORM NOV 10
...NUMBER OF DAYS WITH ... 1999 .. 30YR
ACTUAL .. AVERAGE
PRECIPITATION.. TRACE (ONLY) .......... 54 .. 69
PRECIP.. 0.01 OR MORE (MEASURABLE)..... 114 .. 119
PRECIP.. 0.10 OR MORE ................. 72 .. 62
PRECIP.. 0.50 OR MORE ................. 19 .. 17
PRECIP.. 1.00 OR MORE ................. 4 .. 6
SNOWFALL.. TRACE OR (ONLY)............. 27 .. 38
SNOWFALL.. 1.0 INCH OR MORE ........... 19 .. 17
SNOWFALL.. 2.0 INCHES OR MORE ......... 10 .. 9
SNOWFALL.. 3.0 INCHES OR MORE ......... 5 .. 5
...1999 MONTHLY STATISTICS...
TEMPERATURE PRECIPITATION SNOWFALL
DAILY AVG / DEP TOTAL / DEP TOTAL / DEP
EXTREMES TEMP / NORM PCPN / NORM SNFL / AVG
'99 JAN 38 -22 .. 12.3 / 0.5 .. 2.67 / 1.72 .. 33.1 / 19.8
FEB 47 4 .. 27.9 /10.0 .. 0.40 /-0.48 .. 4.2 / -3.6
MAR 73 5 .. 33.8 / 2.9 .. 1.86 /-0.08 .. 16.3 / 5.3
APR 76 30 .. 49.0 / 2.6 .. 3.43 / 1.01 .. T / -3.0
MAY 85 36 .. 60.1 / 1.6 .. 6.58 / 3.39 .. 0 / -0.1
JUN 91 43 .. 67.2 /-1.0 .. 3.68 /-0.37 .. --- / ---
JUL 99 50 .. 76.2 / 2.7 .. 4.55 / 3.53 .. --- / ---
AUG 91 53 .. 70.5 /-0.5 .. 2.64 /-0.98 .. --- / ---
SEP 91 37 .. 61.1 / 0.6 .. 2.73 / 0.01 .. 0 / 0
OCT 78 26 .. 49.6 / 0.8 .. 0.92 /-1.27 .. T / -0.6
NOV 77 21 .. 41.8 / 8.7 .. 0.77 /-0.78 .. 0.7 / -9.2
'99 DEC 53 -8 .. 25.6 / 7.7 .. 0.33 /-0.75 .. 7.3 / -2.8
ANNUAL 99 -22 .. 47.9 / 3.1 ..30.55 / 2.23 .. 61.3 / 5.8
(SNOW SEASON 98/99 56.5 / +/-0)
WINTER (D,J,F) .. 21.6 / 5.8 .. 3.53 / 1.70 .. 40.4 / 9.2
SPRING (M,A,M) .. 47.6 / 2.4 ..11.86 / 4.11 .. 16.0 / 2.2
SUMMER (J,J,A) .. 7.12 / 0.4 ..10.87 /-0.33 .. --- / ---
AUTUMN (S,O,N) .. 50.8 / 3.3 .. 4.42 /-2.04 .. 0.7 / -9.8
NATIONAL WEATHER SERVICE RECORDS.
NORMALS = 30 YEAR PERIOD...FROM 1960-1991.
AVERAGE = 30 YEAR MOVING AVERAGE...FROM MOST CURRENT DATA
Return to the Climate Journal