Dale City, Virginia climate: NOAA's gridded normals for the city, beside the nearest station records
NOAA's gridded 1991-2020 normals put Dale City's center at January lows of 26°F and July highs of 88°F, a yearly mean of 56.6°F and 42.1 inches of precipitation. No NOAA station keeps a record under the city's name. The nearest station record, Manassas (10 miles NW, 245 ft), has January lows of 24°F and July highs of 88°F.
72,793 people (Census Bureau 2024). Distances and directions are from the city's center.
- Jan 44° 26°
- Feb 48° 28°
- Mar 56° 35°
- Apr 67° 45°
- May 75° 54°
- Jun 83° 63°
- Jul 88° 68°
- Aug 86° 66°
- Sep 79° 59°
- Oct 68° 47°
- Nov 57° 37°
- Dec 48° 30°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
The months above are NOAA's gridded normals at Dale City's center.
What is each month like in Dale City?
NOAA's grid estimates the normals every 5 km or so from the stations around each point, terrain included. It smooths between stations, so night lows at the heart of a large city can run warmer than the grid shows: at five big-city airports we compared, the grid's highs were within about 1°F of the station and its lows 1-6°F cooler. The nearest record's high and low are beside each month.
| Month | High | Low | Mean | Precip. | Manassas high | Manassas low |
|---|---|---|---|---|---|---|
| January | 44°F | 26°F | 35.1°F | 2.83 | 42°F | 24°F |
| February | 48°F | 28°F | 37.9°F | 2.55 | 46°F | 26°F |
| March | 56°F | 35°F | 45.4°F | 3.41 | 54°F | 32°F |
| April | 67°F | 45°F | 56.0°F | 3.27 | 66°F | 43°F |
| May | 75°F | 54°F | 64.6°F | 4.01 | 74°F | 54°F |
| June | 83°F | 63°F | 73.2°F | 3.98 | 83°F | 64°F |
| July | 88°F | 68°F | 77.8°F | 4.21 | 88°F | 69°F |
| August | 86°F | 66°F | 75.9°F | 3.78 | 85°F | 67°F |
| September | 79°F | 59°F | 69.2°F | 4.18 | 78°F | 58°F |
| October | 68°F | 47°F | 57.7°F | 3.50 | 67°F | 46°F |
| November | 57°F | 37°F | 47.2°F | 2.95 | 56°F | 35°F |
| December | 48°F | 30°F | 38.9°F | 3.42 | 47°F | 29°F |
In metric: a yearly mean of 13.7°C, January lows of −3°C, July highs of 31°C and 1,069 mm of precipitation a year.
Source: NOAA NCEI U.S. Monthly Gridded Climate Normals 1991-2020 (nClimGrid, accession 0245564); NOAA NCEI 1991-2020 station normals. The grid cell holding the city's Census center point.
What do the station records around Dale City say?
Each row is a NOAA station's own 1991-2020 normals, with the snow and frost dates the grid does not give. A record downhill or nearer the coast than the city can run warmer, one uphill cooler: compare the elevations.
| Record | Where | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| Manassas | 10 mi NW | 245 ft | 55.5°F | 24°F | 88°F | – | – | April 12 |
| QuanticoQuantico Marine Corps Air Station | 11 mi S | 10 ft | 58.1°F | 28°F | 88°F | 41.0 | 12 | March 28 |
| Vienna | 17 mi N | 418 ft | 54.0°F | 23°F | 84°F | 43.6 | 19 | April 14 |
Source: NOAA NCEI 1991-2020 U.S. Climate Normals; place center and population: Census Bureau 2024. Last frost: the median last spring date of 32°F.
How much snow, how late a frost, what zone and how much sun in Dale City?
NOAA's grid gives no snow, frost dates or records, so these come from the nearest station record, Manassas (10 miles NW, 245 ft). NOAA publishes no snowfall normal for it; the nearest record that has one, Quantico (11 miles S), gets 12 inches a year. The last spring frost (32°F) comes after April 12 in half of years and the first autumn frost before October 27.
The USDA's 2023 Plant Hardiness Zone Map puts Dale City in zone 7b (ZIP code 22193).
Over a year 75% of the sunlight that would reach the ground under clear skies gets through the clouds in the area (4.1 kWh per square metre a day, NASA POWER 2001-2020); July is the sunniest month (80%) and January the cloudiest (70%).
Manassas's page has its months, frost probabilities, records by month and recent years. NOAA's grid has monthly figures only, so there are no day-by-day month pages for Dale City; the nearest record's month pages have them.
Source: NOAA NCEI 1991-2020 normals, station USC00445204; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; sunshine: NASA POWER.
How does the climate vary across Dale City, ZIP code by ZIP code?
One ZIP code area lies wholly or partly in Dale City. Each row also names the nearest station record and its frost dates.
Source: Census Bureau 2020 ZCTA-to-place relationship file and ZCTA centers; NOAA NCEI gridded and station normals, 1991-2020. A ZIP area counts when at least a tenth of its land (and 0.5 km²) is in the city; its figures are the grid cell at its center; frost dates are the nearest record's medians of 32°F.