Vienna, Maryland climate: Normal weather by month, frost dates and records
Vienna's normal year runs from 28°F January nights to 90°F July afternoons. (NOAA 1991-2020 normals)
In metric: a yearly mean of 14.6°C, January lows of −2°C, July highs of 32°C.
- NOAA stationVienna
- Station IDUSC00189140
- Location38.49°N 75.82°W
- Elevation10 ft (3 m)
- Population275
On October 23, the normal high in Vienna is 69°F and the normal low 46°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Vienna.
- Jan 48° 28°
- Feb 50° 29°
- Mar 58° 36°
- Apr 69° 44°
- May 78° 54°
- Jun 86° 63°
- Jul 90° 69°
- Aug 88° 67°
- Sep 82° 61°
- Oct 72° 49°
- Nov 61° 39°
- Dec 51° 31°
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 90°F; January the coldest, with normal lows of 28°F.
| Month | High | Low | Mean | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|
| January | 48°F | 28°F | 37.7°F | – | <1 | 20 | 9 h 50 min |
| February | 50°F | 29°F | 39.3°F | – | <1 | 20 | 10 h 40 min |
| March | 58°F | 36°F | 46.9°F | – | <1 | 12 | 11 h 50 min |
| April | 69°F | 44°F | 56.7°F | – | <1 | 3 | 13 h 10 min |
| May | 78°F | 54°F | 65.8°F | – | 2 | <1 | 14 h 10 min |
| June | 86°F | 63°F | 74.3°F | – | 8 | <1 | 14 h 50 min |
| July | 90°F | 69°F | 79.4°F | – | 17 | <1 | 14 h 40 min |
| August | 88°F | 67°F | 77.4°F | – | 12 | <1 | 13 h 40 min |
| September | 82°F | 61°F | 71.2°F | – | 3 | <1 | 12 h 30 min |
| October | 72°F | 49°F | 60.1°F | – | 1 | 1 | 11 h 20 min |
| November | 61°F | 39°F | 49.6°F | – | <1 | 9 | 10 h 10 min |
| December | 51°F | 31°F | 41.3°F | – | <1 | 19 | 9 h 30 min |
| Year (annual) | 69°F | 47°F | 58.3°F | – | 43 | 83 |
The same normals in °C and millimetres
| Month | High | Low | Mean |
|---|---|---|---|
| January | 9°C | −2°C | 3.2°C |
| February | 10°C | −2°C | 4.1°C |
| March | 15°C | 2°C | 8.3°C |
| April | 21°C | 7°C | 13.7°C |
| May | 25°C | 12°C | 18.8°C |
| June | 30°C | 17°C | 23.5°C |
| July | 32°C | 20°C | 26.3°C |
| August | 31°C | 19°C | 25.2°C |
| September | 28°C | 16°C | 21.8°C |
| October | 22°C | 9°C | 15.6°C |
| November | 16°C | 4°C | 9.8°C |
| December | 11°C | 0°C | 5.2°C |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Salisbury (20 miles away), gets 8 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00189140; 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 April, May, September and October.
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 USC00189140.
When is the last frost in Vienna?
In Vienna, the last spring frost (32°F) comes after April 8 in half of years and after April 23 in one year in ten; the first autumn frost comes before November 4 in half of years and before October 22 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 81 year in 10 after April 23; 9 in 10 after March 24
- First autumn frost, half of years before
- November 41 year in 10 before October 22; 9 in 10 before November 20
NOAA puts the median frost-free season at 209 days, and the season without a hard freeze (28°F) at 236 days.
A hard freeze (28°F) comes after March 27 in half of springs and before November 17 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Vienna in zone 7b in ZIP code 21837, the nearest ZIP area.
Frost dates for every NOAA station in Maryland · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00189140; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. 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, 43 days a year reach 90°F (1 of them 100°F or more) and 83 nights fall to 32°F or colder.
- Days at 90°F or more
- 43a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 83a normal year
- Days that stay below freezing
- 4high of 32°F or less
The highest temperature in this station's record (since 1949) is 104°F, on July 4, 1997; the lowest is −6°F, on January 28, 1987.
The wettest calendar year on that record is 1972, with 55.95 in; the snowiest season is 1966–67, with 40.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00189140; records: ACIS (NOAA Regional Climate Centers), station USC00189140. Records use complete months only; a month missing more than three days is left out.
How sunny is Vienna?
Over a year 76% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Vienna, 4.2 kWh per square metre a day. July is the sunniest month (83%) and January the cloudiest (71%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 71% | 2.2 |
| February | 71% | 3.0 |
| March | 71% | 4.0 |
| April | 75% | 5.2 |
| May | 75% | 5.8 |
| June | 80% | 6.3 |
| July | 83% | 6.2 |
| August | 81% | 5.5 |
| September | 77% | 4.5 |
| October | 75% | 3.3 |
| November | 75% | 2.5 |
| December | 71% | 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 3,892 heating degree days, 28% fewer than the median U.S. place (5,373), and 1,488 cooling degree days, 64% more than the median (908). Five months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 4,375 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 845 | 0 |
| February | 720 | 0 |
| March | 562 | 1 |
| April | 271 | 22 |
| May | 81 | 107 |
| June | 8 | 287 |
| July | 0 | 446 |
| August | 0 | 383 |
| September | 18 | 204 |
| October | 187 | 36 |
| November | 466 | 3 |
| December | 736 | 0 |
| Year (annual) | 3,892 | 1,488 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00189140. 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.
How does Vienna's climate compare?
Vienna is warmer than 23 of the other 25 places with their own NOAA record in Maryland. Across the 7,247 U.S. stations with normals, its annual mean of 58.3°F is warmer than 70%.
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers.
Which places near Vienna share this climate record?
22 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.
- Seaford, DE8,952 people · 16 mi NE
- Laurel, DE4,395 people · 15 mi NE
- Hurlock, MD2,093 people · 10 mi N
- Blades, DE1,330 people · 16 mi NE
- Hebron, MD1,114 people · 8 mi SE
- Sharptown, MD711 people · 7 mi NE
- Secretary, MD469 people · 11 mi NW
- East New Market, MD407 people · 9 mi NW
- Nanticoke, MD396 people · 16 mi S
- Mardela Springs, MD354 people · 4 mi SE
- Bethel, DE267 people · 12 mi NE
- Bivalve, MD164 people · 13 mi S
- Nanticoke Acres, MD128 people · 17 mi S
- Galestown, MD115 people · 8 mi NE
- Quantico, MD92 people · 8 mi SE
- Jesterville, MD90 people · 14 mi S
- Whitehaven, MD80 people · 15 mi S
- Tyaskin, MD79 people · 12 mi S
- Brookview, MD46 people · 6 mi N
- Eldorado, MD46 people · 7 mi N
- Elliott, MD18 people · 16 mi SW
- Waterview, MD0 people · 17 mi S
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 48°F and a normal low of 28°F. The warmest is July (90°F by day, 69°F at night).
Does it snow in Vienna?
Yes. NOAA publishes no 1991-2020 snowfall normal for Vienna's NOAA station; the nearest record that keeps one, Salisbury (20 miles away), records 8 inches of snow in a normal year.
What plant hardiness zone is Vienna in?
The USDA's 2023 map puts Vienna in zone 7b in ZIP code 21837, the nearest ZIP area.
How late can frost come in Vienna?
In half of years the last 32°F night comes after April 8; in one year in ten it comes after April 23. Waiting until April 23 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Maryland climateThe statewide normals and every place in the state
- Salisbury, MD20 miles from this station, 56.9°F a year
- Royal Oak (2 mi SSW), MD25 miles from this station, 58.0°F a year
- Greenwood, DE26 miles from this station, 55.4°F a year
- Georgetown, DE29 miles from this station, 57.6°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made