Dallas/Fort Worth - Normals (1981-2010), Means, and Extremes

POR - period of record (if less than entire climate record)

Note:  If multiple extreme events occurred, year of latest occurrence is listed.

Temperature (°F)
  POR Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
 Normal Daily Maximum 30 56.4 60.4 68.2 76.3 83.6 91.3 95.6 96.1 88.4 78.3 66.9 57.1 76.6
 Mean Daily Maximum 70 55.0 59.5 68.0 76.0 83.5 91.4 95.8 96.1 88.4 78.7 66.7 58.1 76.4
 Highest Daily Maximum
 Year of Occurrence
  93°
1911
96°
1904
100°
1916
101°
2006
107°
1927
113°
1980
110°
1998
112°
1936
111°
2000
106°
1951
89°
2005
90°
1951
113°
Jun 1980
 Mean of Extreme Maximums 70 76.5 80.1 85.2 89.1 94.5 98.8 102.7 103.4 98.7 92.2 83.1 77.6 90.2
 Normal Daily Minimum 30 35.5 39.4 47.0 54.8 64.2 71.4 75.1 75.1 67.5 56.8 46.2 37.1 55.9
 Mean Daily Minimum 70 34.3 38.0 45.8 54.5 63.3 70.9 74.8 74.5 67.1 56.4 45.2 37.2 55.2
 Lowest Daily Minimum
 Year of Occurrence
  -2°
1949
-8°
1899
10°
1943
29°
1989
34°
1903
48°
1903
56°
1924
55°
1915
40°
1942
24°
1917
19°
1950
-1°
1989
-8°
Feb 1899
 Mean of Extreme Minimums 70 17.0 21.7 28.2 38.1 50.0 61.0 68.2 66.5 53.3 40.6 29.2 20.8 41.2
 Normal Dry Bulb 30 45.9 49.9 57.6 65.5 73.9 81.3 85.3 85.6 78.0 67.5 56.6 47.1 66.3
Mean  Dry Bulb 70 44.7 48.8 56.9 65.3 73.4 81.3 85.3 85.3 77.8 67.6 56.0 47.7 65.8
 Wet Bulb 29 38.5 42.3 49.2 56.6 65.1 70.7 72.2 71.5 66.3 57.7 48.5 40.3 56.6
 Dew Point 29 35.9 39.3 46.0 53.5 63.2 69.1 69.8 68.9 63.7 55.2 46.0 37.6 54.0
 
Average Number
of Days with...
 Maximum 100° 30 0.0 0.0 0.0 0.* 0.2 1.2 6.0 9.2 1.0 0.0 0.0 0.0 17.6
 Minimum 32° 30 12.1 6.8 2.0 0.1 0.0 0.0 0.0 0.0 0.0 0.1 2.3 9.7 33.0


Degree Days
  POR Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
 Normal  Heating 30 593 427 261 83 8 0 0 0 6 66 282 558 2286
 Cooling 30 2 5 32 99 284 491 631 638 395 146 29 4 2755


Relative Humidity (%)
  POR Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
 Normal 30 68 67 65 64 70 67 61 59 64 66 69 70 66
 Midnight CST or 1:00 a.m. CDT 30 74 71 69 71 78 74 67 66 71 73 74 73 72
 6:00 a.m. CST or 7:00 a.m. CDT 30 80 80 79 81 87 86 81 80 83 83 82 80 82
 Noon CST or 1:00 p.m. CDT 30 61 58 56 55 59 55 49 49 54 55 58 60 56
 6:00 p.m. CST or 7:00 p.m. CDT 30 59 55 51 51 57 52 45 45 51 55 60 60 53



Sunshine

  POR Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
 Percent of Possible Sunshine 17 52 54 58 61 57 67 75 73 67 63 57 52 61


Weather
  POR Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Number of
Days with...
 Heavy Fog
 (Visibility 1/4 mi.)
49 2.2 1.2 0.9 0.5 0.3 0.1 0.1 0.0 0.1 0.8 1.5 2.1 9.8
 Thunderstorms 65 1.3 2.0 4.0 5.7 7.6 6.3 4.7 4.7 3.3 3.2 1.9 1.3 46.0


Pressure ("Hg)
  POR Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean  Station Pressure 29 29.50 29.45 29.38 29.31 29.29 29.29 29.34 29.31 29.35 29.40 29.45 29.49 29.38
 Sea-Level Pressure 29 30.14 30.09 30.00 29.93 29.90 29.90 29.95 29.94 29.97 30.02 30.08 30.13 30.00


Wind (mph)
  POR Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
 Mean Speed 29 10.7 11.2 12.2 12.2 11.3 10.4 9.9 8.6 8.7 9.7 10.6 10.4 10.5
 Prevailing Direction 16 190° 170° 170° 170° 170° 170° 190° 170° 170° 170° 190° 190° 170°
 
Maximum
2-Minute
 Speed
 Direction
 Year of Occurrence
17 47
310°
2008
51
230°
2000
48
300°
2000
61
250°
2008
52
170°
2006
53
320°
2007
48
330°
2012
47
330°
1996
43
350°
2005
46
230°
2001
43
310°
2006
44
180°
2008
61
250°
Apr 2008
Maximum
5-Second
 Speed
 Direction
 Year of Occurrence
17 54
280°
2008
78
230°
2000
74
270°
2000
75
240°
2008
67
150°
2006
64
300°
2009
64
340°
2012
60
340°
2013
51
010°
2011
54
270°
2004
54
310°
2006
52
290°
2012
78
230°
Feb 2000


Precipitation (in.)
  POR Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
 Normal 30 2.13 2.66 3.49 3.07 4.90 3.79 2.16 1.91 2.55 4.22 2.71 2.55 36.14
 Monthly Maximum
 Year of Occurrence
  9.07
1932
7.40
1997
7.39
2002
17.64
1922
13.66
1982
11.58
1928
11.13
1973
10.33
1915
10.80
1932
14.18
1981
7.94
1918
8.75
1991
17.64
Apr 1922
 Minimum Monthly
 Year of Occurrence
  T
1986
0.01
1918
0.02
1925
0.11
1987
0.22
1911
T
1952
0.00
1993
0.00
2000
0.09
1984
T
1975
0.00
1903
T
1950
0.00
Aug 2000
 Max in 24 hours
 Year of Occurrence
59 4.27
2012
4.06
1965
4.39
1977
4.55
1957
5.34
1989
3.60
2009
4.01
2004
4.05
1976
5.75
2010
5.91
1959
3.89
2008
4.22
1991
5.91
Oct 1959
 
 Number of
 Days with...
 Precipitation > T 30 6.6 6.4 7.8 6.6 9.1 8.0 4.5 4.8 5.5 7.4 6.4 6.7 79.8
 Precipitation 0.10 30 3.7 4.3 5.1 4.3 6.2 5.8 3.1 2.9 3.7 4.9 4.4 4.2 52.6
 Precipitation 0.50 30 1.4 1.8 2.5 2.2 3.5 2.8 1.5 1.2 1.7 2.7 1.8 1.7 24.8
 Precipitation 1.00 30 0.4 0.9 0.9 1.0 1.7 1.1 0.7 0.5 0.8 1.4 0.8 0.6 10.8


Snowfall (in.)
  POR Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
 Average (unofficial) 30 0.3 0.9 0.2 * 0.0 0.0 0.0 0.0 0.0 * T 0.3 1.7
 Maximum Monthly
 Year of Occurrence
  12.1
1964
13.5
1978
6.1
1942
T
2007
          T
1993
5.0
1976
5.5
1898
13.5
Feb 1978
 Maximum in 24 Hours
 Year of Occurrence
  12.1
1964
12.5
2010
6.0
1924
T
2007
          T
1993
5.0
1976
5.5
1898
12.5
Feb 2010
 

Number of
Days with...

 Snowfall 30 1.6 1.4 0.5 0.* 0.0 0.0 0.0 0.0 0.0 0.* 0.3 1.3 5.1
 Snowfall > T 30 0.4 0.7 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.* 0.4 1.8
 Snowfall 1.0 30 0.1 0.3 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.7

 


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