Washington Dulles International Airport Climate and Average Weather
Climate of Washington Dulles International Airport: average temperatures, rainfall and seasons month by month.
Climate in Washington Dulles International Airport month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Month | Avg high | Avg low | Rainfall | Rating |
|---|---|---|---|---|
| January | 39° | 25° | 3,5 in | ★★☆☆☆ |
| February | 45° | 28° | 2,4 in | ★★★☆☆ |
| March | 61° | 39° | 3,6 in | ★★★☆☆ |
| April | 70° | 49° | 2,6 in | ★★★★☆ |
| May | 74° | 57° | 5,8 in | ★★★★☆ |
| June | 87° | 66° | 3,8 in | ★★★★☆ |
| July | 90° | 71° | 5,0 in | ★★★★☆ |
| August | 85° | 67° | 3,2 in | ★★★★☆ |
| September | 79° | 61° | 4,6 in | ★★★★☆ |
| October | 69° | 49° | 1,2 in | ★★★★☆ |
| November | 57° | 40° | 2,0 in | ★★★☆☆ |
| December | 46° | 31° | 3,9 in | ★★☆☆☆ |
Climate type: Continental. Source: Open-Meteo archive (ERA5).
Recent extremes in Washington Dulles International Airport
Highest and lowest readings observed in the last 3 years of reanalysis data - not all-time records.
How Washington Dulles International Airport compares with nearby places
Annual averages, and the difference against Washington Dulles International Airport.
| Place | Distance | Avg temp | vs here | Annual rain |
|---|---|---|---|---|
| Georgetown | 21 mi | 57°F | about the same | 47 in |
| Washington | 23 mi | 57°F | about the same | 47 in |
| Area Code 202 | 23 mi | 57°F | about the same | 47 in |
| Washington, D.C. | 23 mi | 57°F | about the same | 47 in |
| National Mall | 23 mi | 57°F | about the same | 47 in |
Best time to visit Washington Dulles International Airport
Go in April, June, August and October. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: January, February and December - expect the least comfortable mix of heat, cold or rain.
What this means for Washington Dulles International Airport
Today is about average for August. The forecast high of 84°F is in line with the 85°F typical for this month.
A 74% chance means rain is expected over most of the area. Plan indoor alternatives.
Wet roads are likely; braking distances roughly double in heavy rain.
Northern Hemisphere, so peak summer falls in June to August.
The gap between the warmest and coldest month averages 80°F.
What to pack, what to skip
- Lightweight, light-coloured clothing and a refillable water bottle
- Sunglasses, a brimmed hat and SPF 30+
- A packable rain shell - 2 of the next 7 days carry a real chance of rain
- If your dates are flexible, avoid January, February and December - historically the least comfortable months here.
Summary
Washington Dulles International Airport is an airport in Virginia. Washington Dulles International Airport (IAD) is a commercial airport.
Right now it is 65°F (18°C) in Washington Dulles International Airport with clear. It feels like 65°F. Today runs from 65°F to 84°F. Chance of precipitation is 74%. Sightseeing conditions score 7.9/10 - good conditions.
The best time to visit Washington Dulles International Airport is April, June, August and October. The climate is continental. January, February and December tend to be the least comfortable months. July is the warmest month with average highs near 90°F, while January is the coldest with lows near 25°F.
The closest major airport is Ronald Reagan Washington National Airport (DCA), about 23 mi away. Nearby highlights include National Mall, Shenandoah National Park, New River Gorge National Park and Statue of Liberty (UNESCO World Heritage Site).
In plain terms. Today is about average for August. The forecast high of 84°F is in line with the 85°F typical for this month. The best window to be outside is roughly 8 AM to 11 AM, when temperature, rain chance and wind line up best. fishing is the strongest bet in Washington Dulles International Airport today at 8.6/10. Wet roads are likely; braking distances roughly double in heavy rain.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Quick facts about Washington Dulles International Airport
| Type | Airport |
|---|---|
| State | Virginia |
| Country | United States |
| Continent | North America |
| Coordinates | 38°57′11.2″N 77°27′23.4″W (38.9531, -77.4565) |
| IATA code | IAD |
| Local time | 9:22 AM (UTC-04:00) |
| Best months | April, June, August and October |
| Climate | Continental |
Weather map for Washington Dulles International Airport
Animated model layers. Pick a layer to load it.
Animated layers by Windy. For pin-level detail and nearby places, see the interactive map below.
Explore Washington Dulles International Airport
Every topic we hold for this place, and the same topic for the places around it.
Climate for related places
Frequently asked questions
Where is Washington Dulles International Airport?
Washington Dulles International Airport is an airport in Virginia. Its coordinates are 38.9531, -77.4565. It lies in North America.
What is the weather like in Washington Dulles International Airport right now?
It is currently 65°F (18°C) with clear. Humidity is 66% and wind is 4 mph.
When is the best time to visit Washington Dulles International Airport?
April, June, August and October offer the most comfortable conditions in Washington Dulles International Airport, which has a continental climate. January, February and December are usually the hardest months for outdoor plans.
What time zone is Washington Dulles International Airport in?
Washington Dulles International Airport observes America/New_York (UTC-04:00). The local time is 9:22 AM.
What is the nearest airport to Washington Dulles International Airport?
The closest airports are Ronald Reagan Washington National Airport (DCA), 23 mi away, Philadelphia International Airport (PHL), 134 mi away and Newark Liberty International Airport (EWR), 211 mi away.
What are the top things to do in Washington Dulles International Airport?
Popular options include National Mall, Shenandoah National Park, New River Gorge National Park, Statue of Liberty (UNESCO World Heritage Site), Statue of Liberty and Hudson River.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (airports) - coordinates, hierarchy and facts. |
|---|---|
| Forecast and observations | Open-Meteo (ECMWF and national models). |
| Air quality and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Climate averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National Weather Service. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated August 24, 2026 at 9:22 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
