Smithsburg, Maryland climate: Normal weather by month, frost dates and records
Smithsburg's normal year runs from 22°F January nights to 86°F July afternoons. (NOAA 1991-2020 normals)
In metric: a yearly mean of 11.3°C, January lows of −5°C, July highs of 30°C.
- NOAA stationSmithsburg (2 mi NW)
- Station IDUSC00188371
- Location39.66°N 77.58°W
- Elevation670 ft (204 m)
- From the centerunder 1 mile
- Population3,194
On October 23, the normal high in Smithsburg is 63°F and the normal low 39°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Smithsburg.
- Jan 39° 22°
- Feb 42° 22°
- Mar 51° 29°
- Apr 63° 39°
- May 72° 49°
- Jun 81° 59°
- Jul 86° 63°
- Aug 84° 61°
- Sep 77° 54°
- Oct 66° 42°
- Nov 53° 32°
- Dec 43° 26°
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 Smithsburg each month?
July is the warmest month, with normal highs of 86°F; January the coldest, with normal lows of 22°F.
| Month | High | Low | Mean | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|
| January | 39°F | 22°F | 30.3°F | – | <1 | 25 | 9 h 40 min |
| February | 42°F | 22°F | 32.3°F | – | <1 | 24 | 10 h 40 min |
| March | 51°F | 29°F | 39.9°F | – | <1 | 21 | 11 h 50 min |
| April | 63°F | 39°F | 51.1°F | – | <1 | 7 | 13 h 10 min |
| May | 72°F | 49°F | 60.8°F | – | <1 | 1 | 14 h 20 min |
| June | 81°F | 59°F | 70.0°F | – | 4 | <1 | 15 h |
| July | 86°F | 63°F | 74.1°F | – | 8 | <1 | 14 h 40 min |
| August | 84°F | 61°F | 72.3°F | – | 7 | <1 | 13 h 50 min |
| September | 77°F | 54°F | 65.3°F | – | 1 | <1 | 12 h 30 min |
| October | 66°F | 42°F | 53.7°F | – | <1 | 3 | 11 h 10 min |
| November | 53°F | 32°F | 42.7°F | – | <1 | 16 | 10 h |
| December | 43°F | 26°F | 34.5°F | – | <1 | 24 | 9 h 20 min |
| Year (annual) | 63°F | 42°F | 52.3°F | – | 20 | 122 |
The same normals in °C and millimetres
| Month | High | Low | Mean |
|---|---|---|---|
| January | 4°C | −5°C | −0.9°C |
| February | 6°C | −5°C | 0.2°C |
| March | 10°C | −2°C | 4.4°C |
| April | 17°C | 4°C | 10.6°C |
| May | 22°C | 10°C | 16.0°C |
| June | 27°C | 15°C | 21.1°C |
| July | 30°C | 17°C | 23.4°C |
| August | 29°C | 16°C | 22.4°C |
| September | 25°C | 12°C | 18.5°C |
| October | 19°C | 6°C | 12.1°C |
| November | 12°C | 0°C | 5.9°C |
| December | 6°C | −3°C | 1.4°C |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, South Mountain (14 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 USC00188371; 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 Smithsburg?
Normal highs sit between 65°F and 85°F in May, June, August, 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 USC00188371.
When is the last frost in Smithsburg?
In Smithsburg, the last spring frost (32°F) comes after April 25 in half of years and after May 11 in one year in ten; the first autumn frost comes before October 19 in half of years and before October 6 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 251 year in 10 after May 11; 9 in 10 after April 12
- First autumn frost, half of years before
- October 191 year in 10 before October 6; 9 in 10 before November 3
NOAA puts the median frost-free season at 176 days, and the season without a hard freeze (28°F) at 200 days.
A hard freeze (28°F) comes after April 11 in half of springs and before October 30 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Smithsburg in zone 7a in ZIP code 21783, 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 USC00188371; 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 Smithsburg?
In a normal year in Smithsburg, 20 days a year reach 90°F (1 of them 100°F or more) and 122 nights fall to 32°F or colder.
- Days at 90°F or more
- 20a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 122a normal year
- Days that stay below freezing
- 20high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00188371.
How sunny is Smithsburg?
Over a year 73% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Smithsburg, 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 Smithsburg need?
A normal year in Smithsburg brings 5,457 heating degree days, 2% more than the median U.S. place (5,373), and 849 cooling degree days, 6% fewer than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 3,218 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,074 | 0 |
| February | 917 | 0 |
| March | 778 | 0 |
| April | 426 | 9 |
| May | 179 | 49 |
| June | 25 | 173 |
| July | 1 | 285 |
| August | 6 | 233 |
| September | 76 | 87 |
| October | 361 | 13 |
| November | 669 | 0 |
| December | 944 | 0 |
| Year (annual) | 5,457 | 849 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00188371. 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 Smithsburg's climate compare?
Smithsburg is warmer than 2 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 52.3°F is warmer than 51%.
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers.
Which places near Smithsburg share this climate record?
18 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.
- Waynesboro, PA11,101 people · 6 mi N
- Robinwood, MD7,822 people · 5 mi SW
- Wayne Heights, PA3,496 people · 6 mi N
- Pen Mar, PA1,338 people · 6 mi NE
- Cavetown, MD909 people · 2 mi S
- Rouzerville, PA590 people · 6 mi NE
- Mount Aetna, MD581 people · 5 mi S
- Beaver Creek, MD521 people · 7 mi SW
- Mapleville, MD440 people · 9 mi S
- San Mar, MD433 people · 8 mi S
- Mount Lena, MD380 people · 8 mi S
- Leitersburg, MD351 people · 3 mi NW
- Chewsville, MD299 people · 3 mi W
- Bagtown, MD226 people · 6 mi S
- Greensburg, MD172 people · 2 mi NE
- Pondsville, MD169 people · 3 mi S
- Edgemont, MD156 people · 2 mi NE
- Jugtown, MD93 people · 3 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 Smithsburg's climate
What is the coldest month in Smithsburg?
January, with a normal high of 39°F and a normal low of 22°F. The warmest is July (86°F by day, 63°F at night).
Does it snow in Smithsburg?
Yes. NOAA publishes no 1991-2020 snowfall normal for Smithsburg's NOAA station; the nearest record that keeps one, South Mountain (14 miles away), records 33 inches of snow in a normal year.
What plant hardiness zone is Smithsburg in?
The USDA's 2023 map puts Smithsburg in zone 7a in ZIP code 21783, the nearest ZIP area.
How late can frost come in Smithsburg?
In half of years the last 32°F night comes after April 25; in one year in ten it comes after May 11. Waiting until May 11 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Maryland climateThe statewide normals and every place in the state
- Catoctin Mountain Park, MD6 miles from this station, 53.4°F a year
- Hagerstown, MD8 miles from this station, 55.4°F a year
- South Mountain, PA14 miles from this station, 50.0°F a year
- Emmitsburg, MD16 miles from this station, 53.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made