July 1999 Climate Data for Pittsburgh, PA  
See Key below for explanation of abbreviations
      JUL 1999                          (NORMALS 1961-90 RV)
DATE  TEMPS   |DP|HEATING DD|COOLING DD|PRECIPITATION
   HI LO AV NR|DY|DY MON SEA|DY MON SEA| DAY  MON NORM   DEP  YEAR  NORM   DEP
01*87 60 74 71 +3  0   0   0  9   9 211  .56  .56  .13  +.43 19.09 18.92  +.17
02*85 69 77 71 +6  0   0   0 12  21 223  .46 1.02  .26  +.76 19.55 19.05  +.50
03*88 68 78 71 +7  0   0   0 13  34 236    0 1.02  .39  +.63 19.55 19.18  +.37
04*92 74 83 71+12  0   0   0 18  52 254    0 1.02  .52  +.50 19.55 19.31  +.24
05*92 73 83 72+11  0   0   0 18  70 272    0 1.02  .65  +.37 19.55 19.44  +.11
06*91 69 80 72 +8  0   0   0 15  85 287  .27 1.29  .78  +.51 19.82 19.57  +.25
07*83 63 73 72 +1  0   0   0  8  93 295    0 1.29  .91  +.38 19.82 19.70  +.12
08*82 59 71 72 -1  0   0   0  6  99 301    0 1.29 1.03  +.26 19.82 19.82   .00
09*88 62 75 72 +3  0   0   0 10 109 311  .46 1.75 1.15  +.60 20.28 19.94  +.34
10*76 57 67 72 -5  0   0   0  2 111 313    0 1.75 1.27  +.48 20.28 20.06  +.22
11*76 51 64 72 -8  1   1   1  0 111 313    0 1.75 1.39  +.36 20.28 20.18  +.10
12*78 54 66 72 -6  0   1   1  1 112 314    0 1.75 1.51  +.24 20.28 20.30  -.02
13*79 53 66 72 -6  0   1   1  1 113 315    0 1.75 1.63  +.12 20.28 20.42  -.14
14*80 63 72 72  0  0   1   1  7 120 322    0 1.75 1.75     0 20.28 20.54  -.26
15*88 61 75 72 +3  0   1   1 10 130 332    0 1.75 1.87  -.12 20.28 20.66  -.38
16*90 64 77 72 +5  0   1   1 12 142 344    0 1.75 1.99  -.24 20.28 20.78  -.50
..............
............
........................................PITTSBURGH PA AIRPORT JUL 1999
      JUL 1999                          (NORMALS 1961-90 RV)
DATE  TEMPS   |DP|HEATING DD|COOLING DD|PRECIPITATION
   HI LO AV NR|DY|DY MON SEA|DY MON SEA| DAY  MON NORM  DEP  YEAR  NORM   DEP
17*89 70 80 72 +8  0   1   1 15 157 359    T 1.75 2.11 -.36 20.28 20.90  -.62
18*90 66 78 73 +5  0   1   1 13 170 372    0 1.75 2.23 -.48 20.28 21.02  -.74
19*87 70 79 73 +6  0   1   1 14 184 386    0 1.75 2.35 -.60 20.28 21.14  -.86
20*84 70 77 73 +4  0   1   1 12 196 398    T 1.75 2.47 -.72 20.28 21.26  -.98
21*85 64 75 73 +2  0   1   1 10 206 408    T 1.75 2.59 -.84 20.28 21.38 -1.10
22*92 71 82 73 +9  0   1   1 17 223 425    T 1.75 2.71 -.96 20.28 21.50 -1.22
23*94 66 80 73 +7  0   1   1 15 238 440    0 1.75 2.83-1.08 20.28 21.62 -1.34
24*92 71 82 73 +9  0   1   1 17 255 457  .09 1.84 2.95-1.11 20.37 21.74 -1.37
25*91 67 79 73 +6  0   1   1 14 269 471    0 1.84 3.07-1.23 20.37 21.86 -1.49
26*87 65 76 72 +4  0   1   1 11 280 482    0 1.84 3.19-1.35 20.37 21.98 -1.61
27*94 71 83 72+11  0   1   1 18 298 500    0 1.84 3.31-1.47 20.37 22.10 -1.73
28*84 65 75 72+03  0   1   1 10 308 510 3.48 5.32 3.42+1.90 23.85 22.21 +1.64
29*86 63 75 72+03  0   1   1 10 318 520  .93 6.25 3.53+2.72 24.78 22.32 +2.46
30*93 71 82 72+10  0   1   1 17 335 537    0 6.25 3.64+2.61 24.78 22.43 +2.35
31*95 66 81 72+09  0   1   1 16 351 553    T 6.25 3.75+2.50 24.78 22.54 +2.24
 

                    ...JULY 1999...
TEMPERATURES
AVERAGE MAXIMUM................................ 87.0 DEGREES
AVERAGE MINIMUM................................ 65.0 DEGREES
AVERAGE FOR MONTH.............................. 76.0 DEGREES
DEPARTURE FROM NORMAL.......................... +3.9 DEGREES
HIGHEST AND DATE..................... 95 DEGREES ON THE 31ST
LOWEST AND DATE...................... 51 DEGREES ON THE 11TH
NUMBER OF DAYS MAX TEMPERATURE 32 DEGREES OR BELOW.......  0
NUMBER OF DAYS MAX TEMPERATURE 90 DEGREES OR ABOVE....... 12
NUMBER OF DAYS MIN TEMPERATURE 32 DEGREES OR BELOW.......  0
 
HEATING DEGREE DAYS.....................................   1
DEPARTURE FROM NORMAL...................................  -5
SEASONAL TOTAL HEATING..................................   1
COOLING DEGREE DAYS..................................... 351
DEPARTURE FROM NORMAL...................................+124
SEASONAL TOTAL COOLING.................................. 553
 
PRECIPITATION DATA
TOTAL FOR THE MONTH...................................  6.25
DEPARTURE FROM NORMAL................................. +2.50
TOTAL FOR THE YEAR.................................... 24.78
DEPARTURE FROM NORMAL................................. +2.24
MAXIMUM PRECIPITATION IN 24 HOURS 4.41 INCHES ON THE 28TH/29
 
NUMBER OF DAYS WITH PRECIPITATION 0.01 INCHES OR MORE..... 7
NUMBER OF DAYS WITH PRECIPITATION 0.10 INCHES OR MORE..... 6
NUMBER OF DAYS WITH PRECIPITATION 0.50 INCHES OR MORE..... 3
NUMBER OF DAYS WITH PRECIPITATION 1.00 INCHES OR MORE..... 1
 
SUNSHINE
NUMBER OF DAYS WITH CLEAR SKIES..........................  8
NUMBER OF DAYS WITH PARTLY CLOUDY SKIES.................. 16
NUMBER OF DAYS WITH CLOUDY SKIES.........................  7
HIGHEST SEA LEVEL PRESSURE........ 30.27 ON THE 11TH AT 1152
LOWEST SEA LEVEL PRESSURE......... 29.66 ON THE 30TH AT 0334
 
...HIGHLIGHTS...
RECORD PRECIPITATION OF 3.48 INCHES FOR DATE AND MONTH OF JULY.  THE
RECORD FOR JULY WAS 3.20 INCHES ON JULY 26TH 1921.  THE 3.48 INCHES
WAS ALSO THE 3RD GREATEST DAILY AMOUNT EVER...SURPASSED ONLY BY 3.57
INCHES ON AUGUST 21ST 1888 AND 3.56 INCHES OCTOBER 15TH 1954.
 
DESPITE THE RECORD RAINFALL ON THE 28TH...A DROUGHT EMERGENCY CONTINUES
FOR THE REGION.  FROM JULY 10TH THROUGH THE 27TH...MEASURABLE RAIN FELL
ON JUST ONE DAY...0.09 INCHES ON THE 24TH.
 
THE 76.0 DEGREE AVERAGE MAKES IT THE 20TH HOTTEST JULY ON RECORD AND THE
HOTTEST SINCE 1988.  THE TEMPERATURE HIT 90 DEGREES 12 TIMES...WELL
ABOVE THE 3.3 NORMAL...BUT SHORT OF JULY 1988'S RECORD 17 TIMES.  THE
TEMPERATURE THIS SUMMER HAS HIT THE 90S 15 TIMES...DOUBLE THE NORMAL OF
7.5 TIMES.
 
FROM THE 22ND THROUGH THE 31ST...THE TEMERATURE HIT THE 90S IN 7 OUT OF
10 DAYS.
 

Key 

HI = High for Day
LO = Low for Day
AV = Average
NR = Normal Average
DP DY = Daily Departure for Normal
HEATING DD = Heating Degree Day for
-----DY = Day
-----MON = Month
-----SEAS = Season
SNOWFALL for DAY...Month and Season
PRECIPITATION for
-----DY = DAY
-----MON = Month
-----NORM = Cumulative Normal for Month
-----DEP = Cumulitive Departure for Normal for Month
-----YEAR = Cumulitive Yearly Total
-----NORM = Cumulative Yearly Normal
-----DEP = Depature from the Yearly Normal