Pentagon City, Arlington Weather
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Climate of Pentagon City: monthly averages
Based on 25 years of satellite and reanalysis data (2001-2025), July is usually the hottest month in Pentagon City, with average daytime highs around 31°C. January is the coolest, when nights typically fall to about -4°C and frost is possible on the coldest nights. That is a wide yearly range of roughly 35°C, so the seasons feel very different from each other.
The area receives about 1150 mm of rain in a typical year. Most of it falls from May to October (around 58% of the yearly total), and June is the wettest month at roughly 118 mm.
There is no long, mild season here; September usually comes closest to comfortable outdoor weather, with highs near 27°C.
| Month | Avg high | Avg low | Rainfall | Humidity |
|---|---|---|---|---|
| Jan | 4° | -4° | 67 mm | 82% |
| Feb | 6° | -3° | 70 mm | 80% |
| Mar | 11° | 1° | 84 mm | 79% |
| Apr | 18° | 7° | 92 mm | 76% |
| May | 23° | 13° | 109 mm | 78% |
| Jun | 28° | 18° | 118 mm | 74% |
| Jul | 31° | 21° | 116 mm | 69% |
| Aug | 30° | 20° | 109 mm | 70% |
| Sep | 27° | 16° | 107 mm | 72% |
| Oct | 20° | 9° | 105 mm | 76% |
| Nov | 13° | 3° | 80 mm | 79% |
| Dec | 7° | -1° | 95 mm | 83% |
Source: NASA POWER (MERRA-2 reanalysis), averaged over the roughly 50 km grid area around Pentagon City. Values describe typical conditions, not a forecast.
About Pentagon City weather
Pentagon City sits within Virginia's humid subtropical-to-continental climate, from the coastal plain to the Appalachian highlands, about 152 km north of Richmond. Conditions turn hot with warm, humid summers (June–August) with highs in the low-to-mid 30s°C. By December, expect cool winters (December–February), colder and snowier in the western mountains. This page shows live, auto-refreshing weather for Pentagon City: current conditions, an hourly breakdown, a 16-day outlook, a date-lookup tool for any past or future date, and real-time air quality, sourced from Open-Meteo. Local timezone: America/New_York.
Frequently asked questions
Pentagon City is about 152 km north of Richmond, in Virginia.
Pentagon City sees cool winters (December–February), colder and snowier in the western mountains.
The live current conditions, hourly forecast and 16-day outlook above are pulled in real time for Pentagon City's exact coordinates. No fixed schedule, the page updates whenever you load it.
July is usually the hottest month in Pentagon City, with average daytime highs of about 31°C and nights around 21°C.
The coldest nights come in January, when the average low is about -4°C and daytime highs reach around 4°C. Frost is possible on clear, calm nights.
Pentagon City receives about 1150 mm of rain in a typical year. June is the wettest month at roughly 118 mm, and the main rainy period is May to October.
There is no long mild season in Pentagon City. September usually comes closest to comfortable outdoor weather.
In November Pentagon City typically sees daytime highs near 13°C and lows near 3°C, with about 80 mm of rain over the month and average humidity around 79%. Check the live forecast above for this week's actual conditions.
Up to 16 days ahead using the extended forecast and date picker above; further-out or historical dates use the same date lookup tool.
Live temperature for Pentagon City is shown at the top of this page and refreshes automatically — see the hourly breakdown below for how it changes through the day.
Pentagon City's day-to-day weather follows the broader pattern of Virginia described above. See the hourly weather forecast or the air quality index for more detail.