Vienna, Virginia climate: Normal weather by month, frost dates and records
Vienna's normal year runs from 23°F January nights to 84°F July afternoons, with 43.6 inches of precipitation and 19 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 12.2°C, January lows of −5°C, July highs of 29°C, 1,107 mm of precipitation a year.
- NOAA stationVienna
- Station IDUSC00448737
- Location38.89°N 77.29°W
- Elevation418 ft (127 m)
- From the center2 miles
- Population16,562
On October 22, the normal high in Vienna is 64°F and the normal low 43°F, and the chance of measurable rain or snow is 29%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Vienna.
- Jan 42° 23°
- Feb 45° 24°
- Mar 53° 32°
- Apr 65° 41°
- May 72° 52°
- Jun 80° 61°
- Jul 84° 67°
- Aug 82° 65°
- Sep 76° 57°
- Oct 65° 45°
- Nov 56° 35°
- Dec 46° 28°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Vienna each month?
July is the warmest month, with normal highs of 84°F; January the coldest, with normal lows of 23°F. The most precipitation falls in May (4.28 in), the least in February (2.62 in).
Each month has its own page with the day-by-day normals, the month's records and its recent years:
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 42°F | 23°F | 32.9°F | 3.28 | 6.5 | 12 | <1 | 25 | 9 h 40 min |
| February | 45°F | 24°F | 34.8°F | 2.62 | 7.5 | 9 | <1 | 22 | 10 h 40 min |
| March | 53°F | 32°F | 42.4°F | 3.84 | 2.0 | 11 | <1 | 16 | 11 h 50 min |
| April | 65°F | 41°F | 53.0°F | 3.39 | 0.0 | 11 | <1 | 3 | 13 h 10 min |
| May | 72°F | 52°F | 61.9°F | 4.28 | 0.0 | 13 | <1 | <1 | 14 h 20 min |
| June | 80°F | 61°F | 70.2°F | 4.13 | 0.0 | 11 | 2 | <1 | 14 h 50 min |
| July | 84°F | 67°F | 75.2°F | 4.26 | 0.0 | 10 | 6 | <1 | 14 h 40 min |
| August | 82°F | 65°F | 73.6°F | 3.54 | 0.0 | 10 | 4 | <1 | 13 h 40 min |
| September | 76°F | 57°F | 66.5°F | 4.16 | 0.0 | 9 | 1 | <1 | 12 h 30 min |
| October | 65°F | 45°F | 55.3°F | 3.51 | 0.0 | 9 | <1 | 1 | 11 h 20 min |
| November | 56°F | 35°F | 45.2°F | 3.13 | 0.1 | 9 | <1 | 11 | 10 h 10 min |
| December | 46°F | 28°F | 37.2°F | 3.43 | 2.4 | 11 | <1 | 21 | 9 h 30 min |
| Year (annual) | 64°F | 44°F | 54.0°F | 43.57 | 18.5 | 124 | 13 | 99 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 6°C | −5°C | 0.5°C | 83 mm | 17 cm |
| February | 7°C | −4°C | 1.6°C | 67 mm | 19 cm |
| March | 12°C | 0°C | 5.8°C | 98 mm | 5 cm |
| April | 18°C | 5°C | 11.7°C | 86 mm | 0 cm |
| May | 22°C | 11°C | 16.6°C | 109 mm | 0 cm |
| June | 26°C | 16°C | 21.2°C | 105 mm | 0 cm |
| July | 29°C | 19°C | 24.0°C | 108 mm | 0 cm |
| August | 28°C | 18°C | 23.1°C | 90 mm | 0 cm |
| September | 24°C | 14°C | 19.2°C | 106 mm | 0 cm |
| October | 19°C | 7°C | 12.9°C | 89 mm | 0 cm |
| November | 13°C | 1°C | 7.3°C | 80 mm | 0 cm |
| December | 8°C | −2°C | 2.9°C | 87 mm | 6 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00448737; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Vienna?
Normal highs sit between 65°F and 85°F in May, June, July, August, September and October. Of those, October has the fewest days with rain (9).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00448737.
When is the last frost in Vienna?
In Vienna, the last spring frost (32°F) comes after April 14 in half of years and after April 28 in one year in ten; the first autumn frost comes before October 29 in half of years and before October 17 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- April 141 year in 10 after April 28; 9 in 10 after March 30
- First autumn frost, half of years before
- October 291 year in 10 before October 17; 9 in 10 before November 11
NOAA puts the median frost-free season at 198 days, and the season without a hard freeze (28°F) at 221 days.
A hard freeze (28°F) comes after April 2 in half of springs and before November 8 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Vienna in zone 7b in ZIP code 22180. By the map's own method, the average of each year's coldest night over 1991-2020, Vienna's NOAA station is in zone 7b: the coldest night of a typical year reaches 7°F (25 complete years).
Frost dates for every NOAA station in Virginia · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00448737; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Vienna?
In a normal year in Vienna, 13 days a year reach 90°F, 99 nights fall to 32°F or colder and 124 days bring measurable precipitation.
- Days at 90°F or more
- 13a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 99a normal year
- Days that stay below freezing
- 13high of 32°F or less
- Days with 0.01 inch of precipitation
- 124a normal year
- Days with 1 inch of snow or more
- 5a normal year
The highest temperature in this station's record (since 1948) is 100°F, on August 18, 2015; the lowest is −3°F, on February 5, 1996.
The wettest calendar year on that record is 2003, with 64.30 in; the snowiest season is 2009–10, with 74.2 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00448737; records: ACIS (NOAA Regional Climate Centers), station USC00448737. Records use complete months only; a month missing more than three days is left out.
How sunny is Vienna?
Over a year 75% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Vienna, 4.1 kWh per square metre a day. July is the sunniest month (80%) and January the cloudiest (70%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 70% | 2.2 |
| February | 70% | 3.0 |
| March | 71% | 4.0 |
| April | 72% | 5.0 |
| May | 73% | 5.6 |
| June | 79% | 6.2 |
| July | 80% | 6.0 |
| August | 79% | 5.4 |
| September | 76% | 4.4 |
| October | 74% | 3.3 |
| November | 75% | 2.5 |
| December | 70% | 1.9 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Vienna need?
A normal year in Vienna brings 4,931 heating degree days, 8% fewer than the median U.S. place (5,373), and 964 cooling degree days, 6% more than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 3,472 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 997 | 0 |
| February | 846 | 0 |
| March | 700 | 1 |
| April | 373 | 13 |
| May | 156 | 58 |
| June | 24 | 181 |
| July | 1 | 317 |
| August | 3 | 271 |
| September | 62 | 107 |
| October | 315 | 14 |
| November | 595 | 1 |
| December | 861 | 0 |
| Year (annual) | 4,931 | 964 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00448737. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Has Vienna been warmer than normal lately?
2025 averaged 53.9°F, 0.1°F below the 1991-2020 normal of 54.0°F. 4 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 56.0°F | +2.0°F | 44.75 | 11.8 |
| 2022 | 54.1°F | +0.1°F | 48.49 | 19.3 |
| 2023 | 55.9°F | +1.9°F | 40.46 | 1.5 |
| 2024 | 56.0°F | +2.0°F | 37.42 | 10.2 |
| 2025 | 53.9°F | −0.1°F | 36.96 | 19.4 |
Source: observed years: ACIS, station USC00448737. A year counts only with all twelve months complete.
How does Vienna's climate compare?
Vienna is warmer than 19 of the other 80 places with their own NOAA record in Virginia, and wetter than 20. Across the 7,247 U.S. stations with normals, its annual mean of 54.0°F is warmer than 57%.
In the Köppen classification computed from these normals, Vienna is Cfa: temperate, no dry season, hot summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Vienna share this climate record?
10 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- North Bethesda, MD49,498 people · 13 mi NE
- Potomac, MD46,230 people · 10 mi NE
- Oakton, VA36,776 people · 1 mi W
- Fair Oaks, VA35,472 people · 4 mi SW
- Travilah, MD11,128 people · 12 mi N
- Difficult Run, VA10,202 people · 3 mi W
- Fair Lakes, VA8,617 people · 6 mi SW
- Braddock, VA6,404 people · 5 mi SW
- Cabin John, MD2,096 people · 9 mi NE
- Glen Echo, MD285 people · 10 mi NE
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Vienna's climate
What is the coldest month in Vienna?
January, with a normal high of 42°F and a normal low of 23°F. The warmest is July (84°F by day, 67°F at night).
Does it snow in Vienna?
Yes: 19 inches in a normal year, falling on 8 days with 0.1 inch or more, the most in February (7.5 inches).
What is the rainiest month in Vienna?
May, with 4.28 in of precipitation in a normal year; the driest is February with 2.62 in.
What plant hardiness zone is Vienna in?
The USDA's 2023 map puts Vienna in zone 7b in ZIP code 22180. By the same method at Vienna's NOAA station, the coldest night of a typical year reaches 7°F (25 years, 1991-2020): zone 7b.
How late can frost come in Vienna?
In half of years the last 32°F night comes after April 14; in one year in ten it comes after April 28. Waiting until April 28 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Vienna in OctoberThis month day by day, its records and recent years
- Virginia climateThe statewide normals and every place in the state
- Sterling, VA10 miles from this station, 55.7°F a year
- Dalecarlia Reservoir, MD10 miles from this station, 56.2°F a year
- Weather Office Sterling, VA12 miles from this station, 55.4°F a year
- Washington, DC14 miles from this station, 59.3°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made