Climatological Report (Daily)
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
Versions:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
306
CDUS41 KLWX 310621
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
221 AM EDT FRI JUL 31 2026
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JULY 30 2026...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1960 TO 2026
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...................................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 85 2:55 PM 98 1988 88 -3 94
MINIMUM 68 5:46 AM 48 2014 67 1 73
AVERAGE 77 77 0 84
PRECIPITATION (IN)
YESTERDAY 0.00 1.29 2018 0.13 -0.13 0.00
MONTH TO DATE 5.34 4.02 1.32 2.65
SINCE JUN 1 9.63 8.32 1.31 9.58
SINCE JAN 1 24.55 25.56 -1.01 23.50
SNOWFALL (IN)
YESTERDAY 0.0 MM MM 0.0 0.0 0.0
MONTH TO DATE 0.0 0.0 0.0 0.0
SINCE JUN 1 0.0 0.0 0.0 0.0
SINCE JUL 1 0.0 0.0 0.0 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE JUN 1 1 13 -12 15
SINCE JUL 1 0 0 0 0
COOLING
YESTERDAY 12 12 0 19
MONTH TO DATE 423 358 65 459
SINCE JUN 1 701 596 105 780
SINCE JAN 1 874 702 172 898
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION N (340)
HIGHEST GUST SPEED 32 HIGHEST GUST DIRECTION NW (300)
AVERAGE WIND SPEED 10.4
SKY COVER
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 71 2:00 AM
LOWEST 44 1:00 PM
AVERAGE 58
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 88 98 1999
MINIMUM TEMPERATURE (F) 67 50 1997
SUNRISE AND SUNSET
JULY 31 2026..........SUNRISE 6:10 AM EDT SUNSET 8:22 PM EDT
AUGUST 1 2026........SUNRISE 6:11 AM EDT SUNSET 8:21 PM EDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$