Weather History for Washington, DC

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Month of July, 1981

  Max Avg Min Sum
Temperature  
Max Temperature 98 °F 85 °F 0 °F
Mean Temperature 90 °F 80 °F 73 °F
Min Temperature 82 °F 73 °F 62 °F
Degree Days  
Heating Degree Days (base 65) 0 0 0 0
Cooling Degree Days (base 65) 25 15 8 478
Growing Degree Days (base 50) 40 30 23 936
Dew Point  
Dew Point 85 °F 69 °F 32 °F
Precipitation  
Precipitation 1.59 in 0.18 in 0.00 in 5.62 in
Snowdepth - - - -
Wind  
Wind 62 mph 9 mph 0 mph
Gust Wind 63 mph 23 mph 17 mph
Sea Level Pressure  
Sea Level Pressure 30.33 in 30.02 in 29.66 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Jul. 20, 1981 Rise Set
Actual Time 5:58 AM EDT 8:29 PM EDT
Civil Twilight 5:28 AM EDT 9:00 PM EDT
Nautical Twilight 4:50 AM EDT 9:38 PM EDT
Astronomical Twilight 4:07 AM EDT 10:20 PM EDT
Moon 10:56 PM EDT (7/20) 9:21 AM EDT (7/20)
Length of Visible Light 15h 31m
Length of Day
14h 30m
Waning Gibbous, 87% of the Moon is Illuminated
Jul 20
Waning Gibbous
Jul 24
Last Quarter
Jul 30
New
Aug 7
First Quarter
Aug 15
Full

Weather History Calendar

Precipitation Actual month total 5.62 Average Month Total: 3.71
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Thunderstorm
Actual:
84 | 72 0.48
Average:
85 | 68 0.12
Rain
Actual:
84 | 72 0.02
Average:
87 | 68 0.20
Rain
Actual:
81 | 73 0.14
Average:
87 | 69 0.14
Rain
Actual:
78 | 70 1.59
Average:
86 | 69 0.13
Rain
Actual:
0 | 70 0.01
Average:
86 | 69 0.08
Thunderstorm
Actual:
84 | 73 0.00
Average:
87 | 69 0.10
Fog
Actual:
91 | 73 0.00
Average:
88 | 68 0.03
Scattered Clouds
Actual:
93 | 75 0.00
Average:
88 | 69 0.11
Scattered Clouds
Actual:
98 | 82 0.00
Average:
90 | 71 0.17
Partly Cloudy
Actual:
93 | 81 0.00
Average:
89 | 72 0.07
Partly Cloudy
Actual:
91 | 73 0.00
Average:
88 | 70 0.14
Partly Cloudy
Actual:
93 | 73 0.00
Average:
88 | 69 0.13
Rain
Actual:
91 | 79 0.57
Average:
88 | 70 0.21
Partly Cloudy
Actual:
91 | 79 0.00
Average:
89 | 71 0.15
Partly Cloudy
Actual:
86 | 68 0.00
Average:
89 | 71 0.07
Partly Cloudy
Actual:
79 | 70 0.00
Average:
89 | 72 0.11
Partly Cloudy
Actual:
88 | 71 0.00
Average:
90 | 71 0.07
Fog
Actual:
91 | 71 0.00
Average:
90 | 71 0.04
Partly Cloudy
Actual:
95 | 73 0.00
Average:
90 | 72 0.06
Thunderstorm
Actual:
97 | 81 0.76
Average:
90 | 72 0.22
Rain
Actual:
93 | 75 0.20
Average:
89 | 71 0.18
Partly Cloudy
Actual:
84 | 73 0.00
Average:
88 | 71 0.19
Scattered Clouds
Actual:
84 | 69 0.00
Average:
87 | 71 0.09
Rain
Actual:
80 | 71 0.02
Average:
87 | 71 0.09
Rain
Actual:
77 | 72 1.03
Average:
86 | 71 0.15
Thunderstorm
Actual:
89 | 75 0.09
Average:
87 | 71 0.11
Partly Cloudy
Actual:
90 | 75 0.07
Average:
88 | 71 0.06
Thunderstorm
Actual:
87 | 77 0.64
Average:
88 | 71 0.14
Fog
Actual:
84 | 72 0.00
Average:
87 | 70 0.12
Scattered Clouds
Actual:
84 | 62 0.00
Average:
86 | 70 0.13
Scattered Clouds
Actual:
87 | 66 0.00
Average:
88 | 70 0.10
 

Calendar Legend

Sunny
Clear
Mostly Cloudy
Partly Sunny
Partly Cloudy
Mostly Sunny
Cloudy Rain Snow
Hail
Flurries
Thunderstorms Hazy
Fog
Sleet '?' denotes
'chance of'
Unknown

Daily Weather History & Observations

1981 Temp. (°F) Dew Point (°F) Humidity (%) Sea Level Press. (in) Visibility (mi) Wind (mph) Precip. (in) Events
Jul high avg low high avg low high avg low high avg low high avg low high avg high sum  
1 84 78 72 72 69 66 93 81 53 30.22 30.12 30.00 15 9 2 25 15 63 0.48 Fog , Rain , Thunderstorm
2 84 78 72 74 71 67 97 78 64 30.28 30.23 30.21 20 13 6 15 10 - 0.02 Fog , Rain
3 81 77 73 74 70 32 93 81 17 30.30 30.26 30.20 10 9 5 12 6 - 0.14 Fog , Rain
4 78 74 70 74 71 66 100 91 81 30.19 30.02 29.89 10 7 2 16 9 23 1.59 Fog , Rain
5 0 76 70 75 72 70 100 90 71 29.93 29.90 29.86 10 6 0 8 5 - 0.01 Fog , Rain
6 84 78 73 78 75 73 97 88 77 29.95 29.90 29.88 9 6 3 12 7 - 0.00 Fog , Rain , Thunderstorm
7 91 82 73 75 70 32 96 66 12 30.08 30.02 29.96 10 7 4 14 7 18 0.00 Fog
8 93 84 75 75 72 69 82 63 49 30.13 30.08 30.01 10 7 3 15 8 23 0.00  
9 98 90 82 78 75 73 74 61 48 30.02 29.97 29.89 10 6 3 16 11 22 0.00  
10 93 87 81 77 72 61 82 59 40 29.97 29.93 29.90 10 8 7 16 10 17 0.00  
11 91 82 73 67 64 59 73 51 36 30.08 30.04 29.96 15 14 10 12 7 - 0.00  
12 93 83 73 74 67 64 76 59 38 30.11 30.05 29.99 15 14 10 12 6 - 0.00  
13 91 85 79 78 74 71 94 69 52 29.99 29.89 29.78 10 7 3 15 9 - 0.57 Fog , Rain
14 91 86 79 75 69 56 79 58 39 29.88 29.78 29.74 15 8 5 22 12 29 0.00  
15 86 77 68 62 58 53 61 52 44 29.95 29.92 29.89 20 18 15 15 10 18 0.00  
16 79 74 70 67 65 61 81 69 62 29.94 29.92 29.89 20 16 15 13 7 - 0.00  
17 88 80 71 69 66 64 87 64 46 29.99 29.95 29.92 15 10 7 9 5 - 0.00  
18 91 81 71 72 67 63 90 64 39 30.04 30.00 29.97 10 8 4 10 5 - 0.00 Fog
19 95 84 73 74 71 68 85 65 41 30.05 30.01 29.95 9 7 4 13 8 18 0.00  
20 97 89 81 80 76 71 91 71 53 29.97 29.82 29.69 10 6 0 29 13 41 0.76 Fog , Rain , Thunderstorm
21 93 84 75 85 74 32 94 74 16 29.77 29.70 29.66 10 8 0 33 10 50 0.20 Fog , Rain
22 84 78 73 69 67 65 82 65 51 30.02 29.90 29.79 10 9 6 15 11 - 0.00  
23 84 76 69 67 58 55 74 53 37 30.17 30.13 30.04 20 17 10 14 10 - 0.00  
24 80 76 71 68 64 58 76 66 55 30.23 30.21 30.19 15 12 7 10 5 - 0.02 Rain
25 77 74 72 74 71 67 97 88 76 30.24 30.20 30.17 10 8 2 12 8 - 1.03 Fog , Rain
26 89 82 75 80 77 74 97 87 67 30.20 30.12 30.03 10 5 2 17 7 31 0.09 Fog , Rain , Thunderstorm
27 90 82 75 76 74 70 94 77 52 30.14 30.10 30.05 10 7 5 62 10 - 0.07  
28 87 82 77 81 75 68 100 83 69 30.16 30.07 29.94 10 6 1 14 6 - 0.64 Fog , Rain , Thunderstorm
29 84 78 72 77 69 59 100 74 50 30.09 29.92 29.85 15 10 6 23 12 34 0.00 Fog
30 84 73 62 64 58 32 81 58 26 30.25 30.17 30.10 20 18 10 17 11 - 0.00  
31 87 76 66 67 63 58 87 63 41 30.33 30.29 30.26 20 16 10 12 5 - 0.00