Hagerstown, Maryland climate: Normal weather by month, frost dates and records
Hagerstown's normal year runs from 25°F January nights to 87°F July afternoons, with 35.6 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 13.0°C, January lows of −4°C, July highs of 31°C, 904 mm of precipitation a year.
- NOAA stationHagerstown Regional Airport
- Station IDUSW00093706
- Location39.71°N 77.73°W
- Elevation698 ft (213 m)
- From the center5 miles
- Population43,909
On October 23, the normal high in Hagerstown is 63°F and the normal low 45°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 Hagerstown.
- Jan 41° 25°
- Feb 44° 27°
- Mar 53° 34°
- Apr 65° 44°
- May 74° 55°
- Jun 83° 64°
- Jul 87° 68°
- Aug 85° 66°
- Sep 78° 59°
- Oct 66° 47°
- Nov 54° 37°
- Dec 44° 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 Hagerstown 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 September (3.83 in), the least in February (1.97 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. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 41°F | 25°F | 32.9°F | 2.46 | 10 | <1 | 24 | 9 h 40 min |
| February | 44°F | 27°F | 35.5°F | 1.97 | 9 | <1 | 22 | 10 h 40 min |
| March | 53°F | 34°F | 43.4°F | 3.04 | 10 | <1 | 15 | 11 h 50 min |
| April | 65°F | 44°F | 54.6°F | 3.33 | 12 | <1 | 3 | 13 h 10 min |
| May | 74°F | 55°F | 64.4°F | 3.55 | 14 | 1 | <1 | 14 h 20 min |
| June | 83°F | 64°F | 73.1°F | 3.36 | 12 | 5 | <1 | 15 h |
| July | 87°F | 68°F | 77.6°F | 2.94 | 11 | 10 | <1 | 14 h 40 min |
| August | 85°F | 66°F | 75.3°F | 2.90 | 10 | 6 | <1 | 13 h 50 min |
| September | 78°F | 59°F | 68.4°F | 3.83 | 10 | 2 | <1 | 12 h 30 min |
| October | 66°F | 47°F | 56.7°F | 2.76 | 9 | <1 | 1 | 11 h 10 min |
| November | 54°F | 37°F | 45.9°F | 2.63 | 8 | <1 | 9 | 10 h |
| December | 44°F | 30°F | 36.9°F | 2.83 | 9 | <1 | 21 | 9 h 20 min |
| Year (annual) | 64°F | 46°F | 55.4°F | 35.60 | 124 | 24 | 93 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 5°C | −4°C | 0.5°C | 62 mm |
| February | 6°C | −3°C | 1.9°C | 50 mm |
| March | 12°C | 1°C | 6.3°C | 77 mm |
| April | 18°C | 7°C | 12.6°C | 85 mm |
| May | 24°C | 13°C | 18.0°C | 90 mm |
| June | 28°C | 18°C | 22.8°C | 85 mm |
| July | 31°C | 20°C | 25.3°C | 75 mm |
| August | 29°C | 19°C | 24.1°C | 74 mm |
| September | 25°C | 15°C | 20.2°C | 97 mm |
| October | 19°C | 9°C | 13.7°C | 70 mm |
| November | 12°C | 3°C | 7.7°C | 67 mm |
| December | 7°C | −1°C | 2.7°C | 72 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, South Mountain (16 miles away), gets 33 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USW00093706; 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 Hagerstown?
Normal highs sit between 65°F and 85°F in May, June, 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 USW00093706.
When is the last frost in Hagerstown?
In Hagerstown, the last spring frost (32°F) comes after April 7 in half of years and after April 21 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 71 year in 10 after April 21; 9 in 10 after March 25
- First autumn frost, half of years before
- November 41 year in 10 before October 22; 9 in 10 before November 17
NOAA puts the median frost-free season at 209 days, and the season without a hard freeze (28°F) at 232 days.
A hard freeze (28°F) comes after March 28 in half of springs and before November 14 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Hagerstown in zone 7a in ZIP code 21740. By the map's own method, the average of each year's coldest night over 1991-2020, Hagerstown's NOAA station is in zone 7b: the coldest night of a typical year reaches 6°F (22 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.
Frost dates for every NOAA station in Maryland · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USW00093706; 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 Hagerstown?
In a normal year in Hagerstown, 24 days a year reach 90°F, 93 nights fall to 32°F or colder and 124 days bring measurable precipitation.
- Days at 90°F or more
- 24a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 93a normal year
- Days that stay below freezing
- 19high of 32°F or less
- Days with 0.01 inch of precipitation
- 124a normal year
The highest temperature in Hagerstown's official record (kept by the National Weather Service since 1899) is 105°F, on July 14, 1954; the lowest is −27°F, on January 13, 1912.
The wettest calendar year on that record is 1996, with 76.65 in; the snowiest season is 1960–61, with 74.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USW00093706; records: ACIS (NOAA Regional Climate Centers), NWS threaded record HGRthr. Records use complete months only; a month missing more than three days is left out.
How sunny is Hagerstown?
Over a year 73% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Hagerstown, 4.0 kWh per square metre a day. July is the sunniest month (79%) and January the cloudiest (65%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 65% | 2.0 |
| February | 68% | 2.8 |
| March | 68% | 3.8 |
| April | 71% | 4.9 |
| May | 71% | 5.4 |
| June | 77% | 6.1 |
| July | 79% | 6.0 |
| August | 78% | 5.3 |
| September | 75% | 4.3 |
| October | 72% | 3.1 |
| November | 72% | 2.3 |
| December | 66% | 1.7 |
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 Hagerstown need?
A normal year in Hagerstown brings 4,716 heating degree days, 12% fewer than the median U.S. place (5,373), and 1,248 cooling degree days, 38% 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 3,893 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 995 | 0 |
| February | 828 | 0 |
| March | 671 | 1 |
| April | 332 | 20 |
| May | 110 | 93 |
| June | 10 | 255 |
| July | 0 | 391 |
| August | 2 | 321 |
| September | 45 | 145 |
| October | 279 | 22 |
| November | 573 | 0 |
| December | 871 | 0 |
| Year (annual) | 4,716 | 1,248 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00093706. 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 Hagerstown been warmer than normal lately?
2025 averaged 55.8°F, 0.4°F above the 1991-2020 normal of 55.4°F. 4 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 56.6°F | +1.2°F | 31.37 |
| 2022 | 55.2°F | −0.2°F | 34.24 |
| 2023 | 57.0°F | +1.6°F | 26.52 |
| 2024 | 57.5°F | +2.1°F | 31.02 |
| 2025 | 55.8°F | +0.4°F | 25.20 |
Source: observed years: ACIS, station USW00093706. A year counts only with all twelve months complete.
How does Hagerstown's climate compare?
Hagerstown is warmer than 10 of the other 25 places with their own NOAA record in Maryland, and wetter than 0. Across the 7,247 U.S. stations with normals, its annual mean of 55.4°F is warmer than 62%.
In the Köppen classification computed from these normals, Hagerstown 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 Hagerstown share this climate record?
20 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.
- Halfway, MD10,974 people · 7 mi S
- Fountainhead-Orchard Hills, MD6,364 people · 2 mi SE
- Greencastle, PA4,226 people · 6 mi N
- State Line, PA3,288 people · 2 mi N
- Maugansville, MD3,057 people · 1 mi SW
- Paramount-Long Meadow, MD2,660 people · 3 mi SE
- Falling Waters, WV2,384 people · 13 mi SW
- Wilson-Conococheague, MD1,614 people · 6 mi SW
- Mercersburg, PA1,493 people · 13 mi NW
- McConnellsburg, PA1,118 people · 21 mi NW
- Fort Loudon, PA1,044 people · 18 mi NW
- Marion, PA909 people · 11 mi N
- Funkstown, MD858 people · 7 mi S
- Hedgesville, WV299 people · 18 mi SW
- Cearfoss, MD141 people · 3 mi W
- Needmore, PA127 people · 24 mi NW
- Reid, MD101 people · 3 mi E
- Kemps Mill, MD62 people · 7 mi SW
- Fairview, MD0 people · 6 mi W
- Middleburg, MD0 people · 1 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.
What do Hagerstown's other NOAA stations record?
One more NOAA station keeps 1991-2020 normals in or near Hagerstown. This page uses Hagerstown Regional Airport; the other differs by site and elevation:
| Station | From the center | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| Hagerstown (1 mi E) USC00181790 | 1 mi E | 532 ft | 54.1°F | 22°F | 86°F | 43.5 | – | April 11 |
Source: NOAA NCEI 1991-2020 normals for each station. Last frost: the median last spring date of 32°F.
Questions about Hagerstown's climate
What is the coldest month in Hagerstown?
January, with a normal high of 41°F and a normal low of 25°F. The warmest is July (87°F by day, 68°F at night).
Does it snow in Hagerstown?
Yes. NOAA publishes no 1991-2020 snowfall normal for Hagerstown's NOAA station; the nearest record that keeps one, South Mountain (16 miles away), records 33 inches of snow in a normal year.
What is the rainiest month in Hagerstown?
September, with 3.83 in of precipitation in a normal year; the driest is February with 1.97 in.
What plant hardiness zone is Hagerstown in?
The USDA's 2023 map puts Hagerstown in zone 7a in ZIP code 21740. By the same method at Hagerstown's NOAA station, the coldest night of a typical year reaches 6°F (22 years, 1991-2020): zone 7b.
How late can frost come in Hagerstown?
In half of years the last 32°F night comes after April 7; in one year in ten it comes after April 21. Waiting until April 21 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Hagerstown in OctoberThis month day by day, its records and recent years
- Maryland climateThe statewide normals and every place in the state
- Smithsburg, MD8 miles from this station, 52.3°F a year
- Catoctin Mountain Park, MD14 miles from this station, 53.4°F a year
- South Mountain, PA16 miles from this station, 50.0°F a year
- Chambersburg, PA16 miles from this station, 52.9°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made