Patuxent River Naval Air Station, Maryland climate: Climate normals at a NOAA weather station
Patuxent River Naval Air Station's normal year runs from 30°F January nights to 87°F July afternoons, with 45.3 inches of precipitation and 13 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 14.6°C, January lows of −1°C, July highs of 31°C, 1,151 mm of precipitation a year.
- NOAA stationPatuxent River Naval Air Station
- Station IDUSW00013721
- Location38.30°N 76.42°W
- Elevation39 ft (12 m)
On October 23, the normal high in Patuxent River Naval Air Station is 67°F and the normal low 49°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 Patuxent River Naval Air Station.
- Jan 45° 30°
- Feb 48° 31°
- Mar 55° 37°
- Apr 66° 47°
- May 75° 57°
- Jun 83° 66°
- Jul 87° 71°
- Aug 85° 69°
- Sep 79° 63°
- Oct 69° 52°
- Nov 58° 41°
- Dec 50° 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 Patuxent River Naval Air Station each month?
July is the warmest month, with normal highs of 87°F; January the coldest, with normal lows of 30°F. The most precipitation falls in August (4.66 in), the least in February (2.84 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 | 45°F | 30°F | 37.4°F | 2.91 | 3.9 | 10 | <1 | 20 | 9 h 50 min |
| February | 48°F | 31°F | 39.1°F | 2.84 | 6.0 | 9 | <1 | 17 | 10 h 50 min |
| March | 55°F | 37°F | 46.1°F | 4.00 | 1.3 | 11 | <1 | 10 | 11 h 50 min |
| April | 66°F | 47°F | 56.6°F | 3.68 | 0.0 | 11 | <1 | 1 | 13 h 10 min |
| May | 75°F | 57°F | 65.9°F | 3.66 | 0.0 | 12 | 1 | <1 | 14 h 10 min |
| June | 83°F | 66°F | 74.7°F | 4.27 | 0.0 | 11 | 5 | <1 | 14 h 50 min |
| July | 87°F | 71°F | 79.1°F | 4.49 | 0.0 | 10 | 11 | <1 | 14 h 40 min |
| August | 85°F | 69°F | 77.3°F | 4.66 | 0.0 | 9 | 6 | <1 | 13 h 40 min |
| September | 79°F | 63°F | 71.2°F | 4.15 | 0.0 | 9 | 2 | <1 | 12 h 30 min |
| October | 69°F | 52°F | 60.3°F | 4.03 | 0.0 | 9 | <1 | <1 | 11 h 20 min |
| November | 58°F | 41°F | 49.7°F | 3.07 | 0.0 | 8 | <1 | 5 | 10 h 10 min |
| December | 50°F | 34°F | 41.6°F | 3.54 | 1.3 | 10 | <1 | 15 | 9 h 30 min |
| Year (annual) | 67°F | 50°F | 58.3°F | 45.30 | 12.5 | 118 | 26 | 68 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 7°C | −1°C | 3.0°C | 74 mm | 10 cm |
| February | 9°C | −1°C | 3.9°C | 72 mm | 15 cm |
| March | 13°C | 3°C | 7.8°C | 102 mm | 3 cm |
| April | 19°C | 8°C | 13.7°C | 93 mm | 0 cm |
| May | 24°C | 14°C | 18.8°C | 93 mm | 0 cm |
| June | 28°C | 19°C | 23.7°C | 108 mm | 0 cm |
| July | 31°C | 22°C | 26.2°C | 114 mm | 0 cm |
| August | 30°C | 21°C | 25.2°C | 118 mm | 0 cm |
| September | 26°C | 17°C | 21.8°C | 105 mm | 0 cm |
| October | 21°C | 11°C | 15.7°C | 102 mm | 0 cm |
| November | 15°C | 5°C | 9.8°C | 78 mm | 0 cm |
| December | 10°C | 1°C | 5.3°C | 90 mm | 3 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00013721; 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 Patuxent River Naval Air Station?
Normal highs sit between 65°F and 85°F in April, May, June, 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 USW00013721.
When is the last frost at Patuxent River Naval Air Station?
In Patuxent River Naval Air Station, the last spring frost (32°F) comes after March 29 in half of years and after April 10 in one year in ten; the first autumn frost comes before November 15 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 291 year in 10 after April 10; 9 in 10 after March 15
- First autumn frost, half of years before
- November 151 year in 10 before November 1; 9 in 10 before December 1
NOAA puts the median frost-free season at 230 days, and the season without a hard freeze (28°F) at 254 days.
A hard freeze (28°F) comes after March 18 in half of springs and before November 29 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Patuxent River Naval Air Station in zone 8a in ZIP code 20670, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, the station is in zone 8a: the coldest night of a typical year reaches 10°F (23 complete years).
Frost dates for every NOAA station in Maryland · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USW00013721; 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 at Patuxent River Naval Air Station?
In a normal year in Patuxent River Naval Air Station, 26 days a year reach 90°F (1 of them 100°F or more), 68 nights fall to 32°F or colder and 118 days bring measurable precipitation.
- Days at 90°F or more
- 26a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 68a normal year
- Days that stay below freezing
- 7high of 32°F or less
- Days with 0.01 inch of precipitation
- 118a normal year
- Days with 1 inch of snow or more
- 3a normal year
The highest temperature in this station's record (since 1945) is 104°F, on July 25, 2010; the lowest is −3°F, on January 17, 1965.
The wettest calendar year on that record is 2018, with 63.66 in; the snowiest season is 1995–96, with 57.3 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USW00013721; records: ACIS (NOAA Regional Climate Centers), station USW00013721. Records use complete months only; a month missing more than three days is left out.
How humid and windy is it at Patuxent River Naval Air Station, and how clear are the skies?
The summer (June-August) dew point averages 67°F. The muggiest month is July, with an average dew point of 68°F, above the 65°F at which most people call the air sticky; the driest air comes in January (26°F). February is the windiest month (9.8 mph on average), and October has the most clear or nearly clear hours (50%).
| Month | Dew point | Humidity | Afternoon humidity | Wind | Clear or few clouds | Overcast |
|---|---|---|---|---|---|---|
| January | 26°F | 64% | 53% | 8.8 mph | 39% | 27% |
| February | 30°F | 63% | 52% | 9.8 mph | 37% | 30% |
| March | 38°F | 62% | 50% | 9.6 mph | 36% | 27% |
| April | 49°F | 66% | 53% | 8.9 mph | 30% | 21% |
| May | 60°F | 70% | 56% | 7.9 mph | 31% | 20% |
| June | 67°F | 70% | 55% | 7.1 mph | 40% | 14% |
| July | 68°F | 73% | 59% | 6.8 mph | 35% | 15% |
| August | 66°F | 72% | 58% | 7.1 mph | 39% | 15% |
| September | 57°F | 72% | 57% | 7.7 mph | 44% | 18% |
| October | 45°F | 68% | 55% | 8.4 mph | 50% | 23% |
| November | 35°F | 66% | 54% | 8.6 mph | 40% | 21% |
| December | 29°F | 65% | 55% | 8.5 mph | 34% | 26% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00013721. Monthly averages of all hours; afternoon humidity at 3 p.m. local standard time; sky as the share of hours NOAA's observations rate clear or few clouds (a dash where NOAA publishes no sky value).
How sunny is it at Patuxent River Naval Air Station?
Over a year 77% of the sunlight that would reach the ground under clear skies gets through the clouds at Patuxent River Naval Air Station, 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 Patuxent River Naval Air Station record?
A normal year at Patuxent River Naval Air Station brings 3,927 heating degree days, 27% fewer than the median U.S. place (5,373), and 1,507 cooling degree days, 66% 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 4,401 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 854 | 0 |
| February | 724 | 0 |
| March | 589 | 3 |
| April | 280 | 27 |
| May | 81 | 111 |
| June | 6 | 297 |
| July | 0 | 437 |
| August | 0 | 383 |
| September | 17 | 205 |
| October | 187 | 41 |
| November | 463 | 4 |
| December | 726 | 0 |
| Year (annual) | 3,927 | 1,507 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00013721. 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.
Have recent years at Patuxent River Naval Air Station been warmer than normal?
2024 averaged 62.0°F, 3.7°F above the 1991-2020 normal of 58.3°F. 3 of the 3 complete years since 2022 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2022 | 59.8°F | +1.5°F | 48.75 | – |
| 2023 | 61.6°F | +3.3°F | 34.65 | – |
| 2024 | 62.0°F | +3.7°F | 32.36 | – |
Over 64 complete years from 1946 to 2024, the station's annual mean temperature rose at a fitted 4.1°F per century (+0.23°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USW00013721; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Patuxent River Naval Air Station's climate compare?
Patuxent River Naval Air Station is warmer than 23 of the 26 places with their own NOAA record in Maryland, and wetter than 11. Across the 7,247 U.S. stations with normals, its annual mean of 58.3°F is warmer than 70%.
In the Köppen classification computed from these normals, Patuxent River Naval Air Station 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 Patuxent River Naval Air Station share this climate record?
2 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.
- Lexington Park, MD13,419 people · 4 mi SW
- Fishing Creek, MD179 people · 11 mi E
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 Patuxent River Naval Air Station's climate
What is the coldest month at Patuxent River Naval Air Station?
January, with a normal high of 45°F and a normal low of 30°F. The warmest is July (87°F by day, 71°F at night).
Does it snow at Patuxent River Naval Air Station?
Yes: 13 inches in a normal year, falling on 5 days with 0.1 inch or more, the most in February (6.0 inches).
What is the rainiest month at Patuxent River Naval Air Station?
August, with 4.66 in of precipitation in a normal year; the driest is February with 2.84 in.
What plant hardiness zone is Patuxent River Naval Air Station in?
The USDA's 2023 map puts Patuxent River Naval Air Station in zone 8a in ZIP code 20670, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches 10°F (23 years, 1991-2020): zone 8a.
How late can frost come at Patuxent River Naval Air Station?
In half of years the last 32°F night comes after March 29; in one year in ten it comes after April 10. Waiting until April 10 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Patuxent River Naval Air Station in OctoberThis month day by day, its records and recent years
- Maryland climateThe statewide normals and every place in the state
- Solomons, MD2 miles from this station, 58.9°F a year
- St Inigoes Webster NOLF, MD11 miles from this station, 58.4°F a year
- Mechanicsville, MD21 miles from this station, 55.2°F a year
- Warsaw, VA29 miles from this station, 58.2°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made