Arlington, Virginia Weather
Day 93 of summer. Read today’s microseason across nine climate regions →
Arlington weather forecast — hour by hour, 7-day outlook, NOAA radar
Conditions updated 7:35 AM EDT · Open-Meteo
- TodaySep 21Overcast later17%—79°67°—
- TuesdaySep 22Rain81%0.42″68°59°-11°
- WednesdaySep 23Heavy Drizzle81%0.27″61°54°-7°
- ThursdaySep 24Overcast33%—67°55°+6°
- FridaySep 25Overcast15%—71°51°+4°
- SaturdaySep 26Overcast15%—73°52°+2°
- SundaySep 27Overcast——76°55°+3°
Air quality now AQI 52 · Moderate
AQI 52 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 4.5 µg/m³, PM10 at 4.5 µg/m³ — typical background levels with no transport signature.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
PM × Wind × Precip
PM2.5 at 4.5 µg/m³, PM10 at 4.5 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 1.00
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- background
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
September dries up ditches or breaks down bridges.
- Moonrise
- 4:37 PM
- Moonset
- 1:31 AM
- In sign
- ♑︎ Capricorn
Arlington at a glance
- Today vs. normal: Today averages 73°F (high 79°F, low 67°F), 5°F above the 68°F normal for Sep 21
- Last frost: March 24 (1991–2020 median, NOAA station 7 km away)
- Microseason: Sep 21–25
- Planting calendar: September — plant beans, squash, fall brassicas, carrots; harvest tomatoes, peppers, beans, summer squash, winter squash
16-Day Forecast — Arlington
- Mon79°67°17%
- Tue68°59°81%
- Wed61°54°81%
- Thu67°55°33%
- Fri71°51°15%
- Sat73°52°15%
- Sun76°55°8%
- Mon79°59°5%
- Tue80°59°10%
- Wed81°60°17%
- Thu82°62°15%
- Fri79°62°15%
- Sat80°60°6%
- Sun77°62°12%
- Mon72°55°15%
- Tue64°49°26%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Arlington
Interactive wind and temperature map centered on Arlington — it loads in your browser. Open the full weather map.
Right now in the garden
Late season
As of September 21, the first frost (around November 18) is about 8 weeks away. Frost-tender plants keep producing until then. This city's planting calendar for September: plant beans, squash, fall brassicas, and carrots; harvest tomatoes, peppers, beans, summer squash, and winter squash.
Sun & seasons in Arlington
Arlington sits in Arlington County, where the year’s longest day runs 14h 54m of daylight and its shortest just 9h 26m — a swing of +5h 27m between the June and December solstices. Clocks spring forward on Sunday, March 8, 2026 and fall back on Sunday, November 1, 2026.
Virginia Beach, the state’s largest city, lies about 159 miles to the SSE. The nearest town Arlington tracks is Alexandria, roughly 4 miles to the S.
Air quality in Arlington
Air quality in Arlington’s county has held roughly steady since 2020; its cleanest year on record was 2020 (median AQI 34). See the full air-quality history for Arlington.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| March | lettuce, peas, spinach, radishes | radishes |
| April | lettuce, peas, spinach, radishes | lettuce, spinach, radishes |
| May | tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, summer squash, garlic |
| July | tomatoes, peppers, beans, squash | tomatoes, peppers, beans, summer squash |
| August | tomatoes, peppers, beans, squash | tomatoes, peppers, beans, summer squash, winter squash |
| September | beans, squash, fall brassicas, carrots | tomatoes, peppers, beans, summer squash, winter squash |
| October | garlic (overwinter) | tomatoes, peppers, beans, summer squash, winter squash |
| November | — | tomatoes, peppers, beans, summer squash, winter squash, fall brassicas, carrots |
| December | — | fall brassicas, carrots |
A year in weather
The year in Arlington tops out in July (~78°F) and dips lowest in January (~32°F), with August wettest at 4.2 inches and October driest at 2.6 inches.
| Month | Mean temp | Precip |
|---|---|---|
| January | 32° | 3.3″ |
| February | 35° | 2.8″ |
| March | 44° | 3.4″ |
| April | 55° | 3.7″ |
| May | 63° | 3.5″ |
| June | 72° | 3.9″ |
| July | 78° | 3.2″ |
| August | 77° | 4.2″ |
| September | 70° | 3.4″ |
| October | 59° | 2.6″ |
| November | 46° | 3.6″ |
| December | 37° | 3.9″ |
Regional context
Similar climates Seven Corners, VA, Bailey's Crossroads, VA, Lake Barcroft, VA
Arlington swings from 32°F in January to 78°F in July (46°F) per modelled 1991-2020 normals (EC_Earth3P_HR model via Open-Meteo); precipitation in Arlington runs about 41.5 inches.
No season owns Arlington's rain: August reaches 4.2 inches and October keeps 2.6 inches, an even spread through Arlington's year. That even rhythm groups Arlington with places like Seven Corners, VA, Bailey's Crossroads, VA and Lake Barcroft, VA.
Arlington reaches its last hard frost near March 24; that is the cue for peas, lettuce, spinach, and radishes. Arlington's heat-lovers — tomatoes, peppers, squash — hold off until Arlington's frost risk clears, 10-14 days on. Frost returns to Arlington near November 18, ending the tender-crop season. Open lawns in Arlington whiten first when frost returns.
Similar climates: Seven Corners, VA, Bailey's Crossroads, VA, Lake Barcroft, VA, Falls Church, VA, Alexandria, VA.
Frequently asked
- When does it freeze in Arlington?
- Frost typically leaves Arlington by March 24 and returns to Arlington near November 18.
- What is the rainy season in Arlington?
- August is the wettest month in Arlington, about 4.2 inches on average; the year totals roughly 42 inches.
- What is the warmest month in Arlington?
- On average July tops the year in Arlington at about 78°F.
- What is the coldest month in Arlington?
- The coldest stretch in Arlington falls in January, around 32°F on average.
- When can I start a vegetable garden in Arlington?
- Around March 24, start frost-hardy crops in Arlington; tomatoes and basil belong a fortnight later.
- What hardiness zone is Arlington?
- Because Arlington bottoms near 32°F in January, that winter low sets Arlington's USDA zone — verify by ZIP.
- What is the 10-day forecast for Arlington?
- Arlington's extended outlook — daily high and low temperatures and precipitation chances for each upcoming day — is in the daily forecast above.
- Will it rain this week in Arlington?
- See this week's day-by-day rain chances for Arlington in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Arlington?
- Current conditions for Arlington and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Arlington forecast updated?
- The Arlington forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Arlington?
- Today's sunrise and sunset times for Arlington are in the Almanac section above, along with civil dawn, civil dusk, and day length. Day length is longest near the summer solstice and shortest near the winter solstice.
- How accurate is the weather forecast for Arlington?
- The next few days in Arlington's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Arlington sits at 38.9°N; its climate zone is warm-summer humid continental (Köppen approximation).
ZIP codes in Arlington
- 22201
- 22202
- 22203
- 22204
- 22205
- 22206
- 22207
- 22209
- 22210
- 22211
- 22212
- 22213
- 22214
- 22215
- 22216
- 22217
- 22219
- 22225
- 22226
- 22227
- 22230
- 22240
- 22241
- 22242
- 22243
- 22244
- 22245
- 22246
- 22350