Beltsville, Maryland climate: Normal weather by month, frost dates and records
Beltsville's normal year runs from 25°F January nights to 87°F July afternoons, with 44.0 inches of precipitation and 16 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 13.3°C, January lows of −4°C, July highs of 31°C, 1,118 mm of precipitation a year.
- NOAA stationBeltsville
- Station IDUSC00180700
- Location39.03°N 76.93°W
- Elevation145 ft (44 m)
- From the centerunder 1 mile
- Population (census place)19,086
On October 23, the normal high in Beltsville is 65°F and the normal low 44°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 Beltsville.
- Jan 43° 25°
- Feb 46° 27°
- Mar 53° 34°
- Apr 65° 44°
- May 74° 54°
- Jun 83° 63°
- Jul 87° 68°
- Aug 86° 66°
- Sep 79° 59°
- Oct 68° 47°
- Nov 57° 37°
- Dec 47° 30°
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 Beltsville each month?
July is the warmest month, with normal highs of 87°F; January the coldest, with normal lows of 25°F. The most precipitation falls in July (4.51 in), the least in February (2.40 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 43°F | 25°F | 34.0°F | 2.87 | 5.7 | 10 | <1 | 25 | 9 h 40 min |
| February | 46°F | 27°F | 36.3°F | 2.40 | 5.0 | 9 | <1 | 21 | 10 h 40 min |
| March | 53°F | 34°F | 43.7°F | 3.72 | 2.5 | 10 | <1 | 14 | 11 h 50 min |
| April | 65°F | 44°F | 54.5°F | 3.28 | 0.1 | 11 | <1 | 3 | 13 h 10 min |
| May | 74°F | 54°F | 63.9°F | 4.27 | 0.0 | 11 | 1 | <1 | 14 h 20 min |
| June | 83°F | 63°F | 73.0°F | 4.23 | 0.0 | 10 | 6 | <1 | 14 h 50 min |
| July | 87°F | 68°F | 77.4°F | 4.51 | 0.0 | 10 | 12 | <1 | 14 h 40 min |
| August | 86°F | 66°F | 75.8°F | 3.88 | 0.0 | 9 | 8 | <1 | 13 h 40 min |
| September | 79°F | 59°F | 69.3°F | 4.42 | 0.0 | 9 | 3 | <1 | 12 h 30 min |
| October | 68°F | 47°F | 57.3°F | 4.04 | 0.0 | 9 | <1 | 1 | 11 h 10 min |
| November | 57°F | 37°F | 46.7°F | 2.92 | 0.2 | 8 | <1 | 10 | 10 h |
| December | 47°F | 30°F | 38.3°F | 3.48 | 2.3 | 10 | <1 | 22 | 9 h 30 min |
| Year (annual) | 66°F | 46°F | 55.9°F | 44.02 | 15.8 | 116 | 30 | 95 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 6°C | −4°C | 1.1°C | 73 mm | 14 cm |
| February | 8°C | −3°C | 2.4°C | 61 mm | 13 cm |
| March | 12°C | 1°C | 6.5°C | 94 mm | 6 cm |
| April | 19°C | 7°C | 12.5°C | 83 mm | 0 cm |
| May | 23°C | 12°C | 17.7°C | 108 mm | 0 cm |
| June | 28°C | 17°C | 22.8°C | 107 mm | 0 cm |
| July | 31°C | 20°C | 25.2°C | 115 mm | 0 cm |
| August | 30°C | 19°C | 24.3°C | 99 mm | 0 cm |
| September | 26°C | 15°C | 20.7°C | 112 mm | 0 cm |
| October | 20°C | 8°C | 14.1°C | 103 mm | 0 cm |
| November | 14°C | 3°C | 8.2°C | 74 mm | 1 cm |
| December | 8°C | −1°C | 3.5°C | 88 mm | 6 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00180700; 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 Beltsville?
Normal highs sit between 65°F and 85°F in April, May, June, September and October. Of those, September 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 USC00180700.
When is the last frost in Beltsville?
In Beltsville, the last spring frost (32°F) comes after April 10 in half of years and after May 1 in one year in ten; the first autumn frost comes before November 1 in half of years and before October 16 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 101 year in 10 after May 1; 9 in 10 after March 27
- First autumn frost, half of years before
- November 11 year in 10 before October 16; 9 in 10 before November 14
NOAA puts the median frost-free season at 202 days, and the season without a hard freeze (28°F) at 229 days.
A hard freeze (28°F) comes after March 29 in half of springs and before November 11 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Beltsville in zone 7b across its 2 ZIP code areas (7b in 20705, the largest). By the map's own method, the average of each year's coldest night over 1991-2020, Beltsville's NOAA station is in zone 7b: the coldest night of a typical year reaches 8°F (27 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 USC00180700; 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.
What hardiness zone is each Beltsville ZIP code in?
The USDA's 2023 map gives each ZIP code area one zone. Beltsville's 2 ZIP code areas are all in zone 7b. Each ZIP's frost dates are in the frost tool.
Source: USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; ZIP areas in the place: Census Bureau 2020 ZCTA-to-place relationship file. A ZIP area counts when at least a tenth of its land (and 0.5 km²) lies in the place.
How hot and how cold does it get in Beltsville?
In a normal year in Beltsville, 30 days a year reach 90°F (1 of them 100°F or more), 95 nights fall to 32°F or colder and 116 days bring measurable precipitation.
- Days at 90°F or more
- 30a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 95a normal year
- Days that stay below freezing
- 11high of 32°F or less
- Days with 0.01 inch of precipitation
- 116a normal year
- Days with 1 inch of snow or more
- 5a normal year
The highest temperature in this station's record (since 1941) is 103°F, on July 17, 1988; the lowest is −15°F, on January 18, 1957.
The wettest calendar year on that record is 2018, with 65.90 in; the snowiest season is 2009–10, with 64.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00180700; records: ACIS (NOAA Regional Climate Centers), station USC00180700. Records use complete months only; a month missing more than three days is left out.
How sunny is Beltsville?
Over a year 74% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Beltsville, 4.0 kWh per square metre a day. July is the sunniest month (82%) and December the cloudiest (67%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 67% | 2.0 |
| February | 69% | 2.9 |
| March | 68% | 3.8 |
| April | 72% | 5.0 |
| May | 72% | 5.5 |
| June | 78% | 6.2 |
| July | 82% | 6.2 |
| August | 80% | 5.4 |
| September | 76% | 4.3 |
| October | 72% | 3.2 |
| November | 73% | 2.3 |
| December | 67% | 1.8 |
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 Beltsville need?
A normal year in Beltsville brings 4,568 heating degree days, 15% fewer than the median U.S. place (5,373), and 1,269 cooling degree days, 40% more than the median (908). Six months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 3,927 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 961 | 0 |
| February | 805 | 0 |
| March | 660 | 1 |
| April | 332 | 18 |
| May | 119 | 85 |
| June | 13 | 253 |
| July | 0 | 383 |
| August | 1 | 337 |
| September | 37 | 166 |
| October | 263 | 24 |
| November | 550 | 1 |
| December | 828 | 0 |
| Year (annual) | 4,568 | 1,269 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00180700. 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 Beltsville been warmer than normal lately?
2025 averaged 56.0°F, 0.1°F above the 1991-2020 normal of 55.9°F. 4 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 57.3°F | +1.4°F | 42.41 | 7.2 |
| 2022 | 55.9°F | at normal | 45.70 | 14.7 |
| 2023 | 57.5°F | +1.6°F | 38.05 | 1.0 |
| 2024 | 57.9°F | +2.0°F | 37.32 | 9.8 |
| 2025 | 56.0°F | +0.1°F | 37.11 | 17.3 |
Over 59 complete years from 1949 to 2025, the station's annual mean temperature rose at a fitted 4.4°F per century (+0.25°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00180700; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Beltsville's climate compare?
Beltsville is warmer than 11 of the other 25 places with their own NOAA record in Maryland, and wetter than 7. Across the 7,247 U.S. stations with normals, its annual mean of 55.9°F is warmer than 63%.
In the Köppen classification computed from these normals, Beltsville 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 Beltsville share this climate record?
6 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.
- Greenbelt, MD24,843 people · 3 mi SE
- Calverton, MD17,721 people · 2 mi NW
- White Oak, MD16,458 people · 3 mi W
- Colesville, MD14,075 people · 5 mi NW
- Hillandale, MD4,901 people · 2 mi W
- Burnt Mills, MD4,111 people · 4 mi W
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 Beltsville's climate
What is the coldest month in Beltsville?
January, with a normal high of 43°F and a normal low of 25°F. The warmest is July (87°F by day, 68°F at night).
Does it snow in Beltsville?
Yes: 16 inches in a normal year, falling on 8 days with 0.1 inch or more, the most in January (5.7 inches).
What is the rainiest month in Beltsville?
July, with 4.51 in of precipitation in a normal year; the driest is February with 2.40 in.
What plant hardiness zone is Beltsville in?
The USDA's 2023 map puts Beltsville in zone 7b across its 2 ZIP code areas (7b in 20705, the largest). By the same method at Beltsville's NOAA station, the coldest night of a typical year reaches 8°F (27 years, 1991-2020): zone 7b.
How late can frost come in Beltsville?
In half of years the last 32°F night comes after April 10; in one year in ten it comes after May 1. Waiting until May 1 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Maryland climateThe statewide normals and every place in the state
- Laurel, MD4 miles from this station, 57.1°F a year
- Glenn Dale, MD8 miles from this station, 54.9°F a year
- National Arboretum DC, MD8 miles from this station, 58.3°F a year
- Dalecarlia Reservoir, MD12 miles from this station, 56.2°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made