Annapolis Police Barracks, Maryland climate: Climate normals at a NOAA weather station
Annapolis Police Barracks's normal year runs from 29°F January nights to 89°F July afternoons. (NOAA 1991-2020 normals)
In metric: a yearly mean of 14.9°C, January lows of −2°C, July highs of 32°C.
- NOAA stationAnnapolis Police Barracks
- Station IDUSC00180193
- Location38.99°N 76.51°W
- Elevation25 ft (8 m)
On October 12, the normal high in Annapolis Police Barracks is 70°F and the normal low 54°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Annapolis Police Barracks.
- Jan 44° 29°
- Feb 48° 31°
- Mar 55° 38°
- Apr 68° 48°
- May 77° 57°
- Jun 85° 67°
- Jul 89° 71°
- Aug 86° 70°
- Sep 80° 65°
- Oct 69° 52°
- Nov 58° 41°
- Dec 48° 34°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like at Annapolis Police Barracks each month?
July is the warmest month, with normal highs of 89°F; January the coldest, with normal lows of 29°F.
| Month | High | Low | Mean | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|
| January | 44°F | 29°F | 36.8°F | – | <1 | 22 | 9 h 40 min |
| February | 48°F | 31°F | 39.3°F | – | <1 | 20 | 10 h 40 min |
| March | 55°F | 38°F | 46.7°F | – | <1 | 11 | 11 h 50 min |
| April | 68°F | 48°F | 58.0°F | – | <1 | 2 | 13 h 10 min |
| May | 77°F | 57°F | 66.9°F | – | 3 | <1 | 14 h 20 min |
| June | 85°F | 67°F | 75.9°F | – | 8 | <1 | 14 h 50 min |
| July | 89°F | 71°F | 80.2°F | – | 15 | <1 | 14 h 40 min |
| August | 86°F | 70°F | 78.4°F | – | 10 | <1 | 13 h 40 min |
| September | 80°F | 65°F | 72.3°F | – | 2 | <1 | 12 h 30 min |
| October | 69°F | 52°F | 60.3°F | – | <1 | 1 | 11 h 10 min |
| November | 58°F | 41°F | 49.4°F | – | <1 | 8 | 10 h 10 min |
| December | 48°F | 34°F | 41.1°F | – | <1 | 18 | 9 h 30 min |
| Year (annual) | 67°F | 50°F | 58.8°F | – | 40 | 81 |
The same normals in °C and millimetres
| Month | High | Low | Mean |
|---|---|---|---|
| January | 7°C | −2°C | 2.7°C |
| February | 9°C | −1°C | 4.1°C |
| March | 13°C | 3°C | 8.2°C |
| April | 20°C | 9°C | 14.4°C |
| May | 25°C | 14°C | 19.4°C |
| June | 30°C | 19°C | 24.4°C |
| July | 32°C | 22°C | 26.8°C |
| August | 30°C | 21°C | 25.8°C |
| September | 27°C | 18°C | 22.4°C |
| October | 20°C | 11°C | 15.7°C |
| November | 14°C | 5°C | 9.7°C |
| December | 9°C | 1°C | 5.1°C |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Baltimore (15 miles away), gets 19 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00180193; 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.
Which months are mildest at Annapolis Police Barracks?
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 USC00180193.
When is the last frost at Annapolis Police Barracks?
In Annapolis Police Barracks, the last spring frost (32°F) comes after March 27 in half of years and after April 9 in one year in ten; the first autumn frost comes before November 13 in half of years and before November 1 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
- March 271 year in 10 after April 9; 9 in 10 after March 9
- First autumn frost, half of years before
- November 131 year in 10 before November 1; 9 in 10 before December 1
NOAA puts the median frost-free season at 234 days, and the season without a hard freeze (28°F) at 259 days.
A hard freeze (28°F) comes after March 14 in half of springs and before November 28 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Annapolis Police Barracks in zone 8a in ZIP code 21402, 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 USC00180193; 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 at Annapolis Police Barracks?
In a normal year in Annapolis Police Barracks, 40 days a year reach 90°F (1 of them 100°F or more) and 81 nights fall to 32°F or colder.
- Days at 90°F or more
- 40a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 81a normal year
- Days that stay below freezing
- 6high of 32°F or less
The highest temperature in this station's record (since 1951) is 103°F, on July 23, 1991; the lowest is −8°F, on January 22, 1984.
The wettest calendar year on that record is 1979, with 57.18 in; the snowiest season is 1960–61, with 36.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00180193; records: ACIS (NOAA Regional Climate Centers), station USC00180193. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Annapolis Police Barracks?
Over a year 77% of the sunlight that would reach the ground under clear skies gets through the clouds at Annapolis Police Barracks, 4.2 kWh per square metre a day. July is the sunniest month (84%) and January the cloudiest (71%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 71% | 2.2 |
| February | 72% | 3.0 |
| March | 72% | 4.0 |
| April | 75% | 5.2 |
| May | 76% | 5.8 |
| June | 82% | 6.4 |
| July | 84% | 6.3 |
| August | 82% | 5.6 |
| September | 79% | 4.5 |
| October | 76% | 3.4 |
| November | 76% | 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 many heating and cooling degree days does Annapolis Police Barracks record?
A normal year at Annapolis Police Barracks brings 3,876 heating degree days, 28% fewer than the median U.S. place (5,373), and 1,643 cooling degree days, 81% 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 4,561 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 876 | 0 |
| February | 718 | 0 |
| March | 570 | 1 |
| April | 239 | 31 |
| May | 63 | 121 |
| June | 3 | 332 |
| July | 0 | 471 |
| August | 0 | 414 |
| September | 15 | 234 |
| October | 184 | 38 |
| November | 469 | 2 |
| December | 739 | 0 |
| Year (annual) | 3,876 | 1,643 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00180193. 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 Annapolis Police Barracks's climate compare?
Annapolis Police Barracks is warmer than 24 of the 26 places with their own NOAA record in Maryland. Across the 7,247 U.S. stations with normals, its annual mean of 58.8°F is warmer than 71%.
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers.
Which places near Annapolis Police Barracks 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.
- Severna Park, MD39,499 people · 7 mi NW
- Arnold, MD23,866 people · 3 mi N
- Lake Shore, MD18,263 people · 7 mi N
- Parole, MD17,910 people · 2 mi W
- Edgewater, MD8,297 people · 4 mi SW
- Riva, MD4,798 people · 6 mi SW
- Herald Harbor, MD2,507 people · 5 mi NW
- Crownsville, MD1,701 people · 5 mi NW
- Arden on the Severn, MD1,691 people · 7 mi NW
- Galesville, MD1,206 people · 11 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 Annapolis Police Barracks's climate
What is the coldest month at Annapolis Police Barracks?
January, with a normal high of 44°F and a normal low of 29°F. The warmest is July (89°F by day, 71°F at night).
Does it snow at Annapolis Police Barracks?
Yes. NOAA publishes no 1991-2020 snowfall normal for the station; the nearest record that keeps one, Baltimore (15 miles away), records 19 inches of snow in a normal year.
What plant hardiness zone is Annapolis Police Barracks in?
The USDA's 2023 map puts Annapolis Police Barracks in zone 8a in ZIP code 21402, the nearest ZIP area.
How late can frost come at Annapolis Police Barracks?
In half of years the last 32°F night comes after March 27; in one year in ten it comes after April 9. Waiting until April 9 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Maryland climateThe statewide normals and every place in the state
- Annapolis, MD2 miles from this station, 57.7°F a year
- Stevensville, MD9 miles from this station, 57.1°F a year
- Baltimore, MD16 miles from this station, 56.2°F a year
- Glenn Dale, MD16 miles from this station, 54.9°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made