Climate and Weather Charts
Washington Dulles International Airport (IAD)
(Washington, District of Columbia - DC, USA)
Washington features a continental climate with warm and humid summers, contrasting with cooler, frosty winters. Located in the District of Columbia, the capital city of Washington is at its hottest between July and August, when temperatures regularly exceed 30°C / 86°F.
The rainfall in the Washington DC area is spread fairly evenly throughout the year and is rarely excessive. As the winter season approaches the climate in Washington quickly begins to change, with daytime temperatures averaging just 6°C / 43°F between December and February. Snowfalls can be expected at anytime during the winters in Washington, together with sharp frosts and crisp, icy days. The average annual daytime temperatures in Washington are around 19°C / 66°F.
Climate Description: Continental climate
Washington Dulles Airport (IAD) Location: Northern Hemisphere, USA, District of Columbia
Annual High / Low Daytime Temperatures at Washington: 31°C / 5°C (88°F / 41°F)
Average Daily January Temperature: 5°C / 41°F
Average Daily June Temperature: 29°C / 84°F
Annual Rainfall / Precipication Washington at Airport (IAD): 1011 mm / 40 inches
Washington Dulles Airport (IAD):
Climate and Weather Charts
Temperature Chart |
| Temperatures |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Average |
Maximum
Celcius (°C) |
5 |
7 |
13 |
19 |
25 |
29 |
31 |
30 |
27 |
20 |
14 |
8 |
19 |
Minimum
Celcius (°C) |
-3 |
-2 |
3 |
8 |
13 |
19 |
25 |
21 |
17 |
10 |
5 |
-1 |
10 |
Maximum
Fahrenheit (°F) |
41 |
45 |
55 |
66 |
77 |
84 |
88 |
86 |
81 |
68 |
57 |
46 |
66 |
Minimum
Fahrenheit (°F) |
27 |
28 |
37 |
46 |
55 |
66 |
77 |
70 |
63 |
50 |
41 |
30 |
49 |
Rainfall / Precipitation Chart |
| Rainfall |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Total |
| Rainfall (mm) |
69 |
76 |
107 |
84 |
86 |
91 |
89 |
119 |
79 |
61 |
76 |
74 |
1011 |
| Rainfall (inches) |
2.7 |
3.0 |
4.2 |
3.3 |
3.4 |
3.6 |
3.5 |
4.7 |
3.1 |
2.4 |
3.0 |
2.9 |
40 |
Seasonal Chart |
| Seasons |
Average
Temp
(Max °C) |
Average
Temp
(Min °C) |
Average
Temp
(Max °F) |
Average
Temp
(Min °F) |
Total
Rainfall
(mm) |
Total
Rainfall
(inches) |
| Mar to May (Spring) |
19 |
8 |
66 |
46 |
277 |
11 |
| Jun to Aug (Summer) |
30 |
22 |
86 |
71 |
299 |
12 |
| Sept to Nov (Autumn / Fall) |
20 |
11 |
69 |
51 |
216 |
9 |
| Dec to Feb (Winter) |
7 |
-2 |
44 |
28 |
219 |
9 |
