Weather in Hagerstown, Maryland
Roses open along the stoops. Day 59 of spring. Read this microseason across nine climate regions →
- TodayMay 16Overcast49%82°48°
- SundayMay 17Light Rain18%86°59°
- MondayMay 18Rain—96°64°
- TuesdayMay 19Thunderstorm—88°63°
- WednesdayMay 20Light Drizzle71%85°59°
- ThursdayMay 21Overcast19%67°48°
- FridayMay 22Light Rain49%57°49°
- PM 2.5
- 4.3 μg/m³
- PM 10
- 4.5 μg/m³
- NO₂
- 4.6 μg/m³
- Ozone
- 77.0 μg/m³
- UV Index
- 0.0 Low
When the dew is on the grass, rain will never come to pass.
- Moonrise
- 9:59 AM
- Moonset
- 12:46 AM
- In sign
- ♊︎ Gemini
Roses open along the stoops
Hagerstown at a glance
- Today vs. normal: 6°F below the seasonal normal for this latitude
- Last frost: April 14 (climatological average for this latitude)
- Microseason: 28 of 72, May 16–20
- Planting window: Direct sow okra, melons, and southern peas. Thin carrot rows.
Right now in the garden
Warm-season window is open
As of May 17, the last spring frost has passed for most years. Transplant tomatoes, peppers, eggplants, basil, and cucurbits (cucumbers, squash, melons) now. Direct-sow beans and corn into warm soil.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | — | — |
| February | — | — |
| March | — | — |
| April | lettuce, peas, spinach, radishes | — |
| May | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| July | tomatoes, peppers, beans, squash | tomatoes, beans, summer squash |
| August | — | tomatoes, beans, summer squash |
| September | fall brassicas, garlic (overwinter), carrots | tomatoes, beans, summer squash |
| October | fall brassicas, garlic (overwinter), carrots | winter squash, tomatoes (last) |
| November | — | — |
| December | — | — |
A year in weather
July brings Hagerstown's peak warmth with mean temperatures around 76°F, while January delivers the year's coldest conditions at roughly 31°F. Rainfall reaches its maximum in September at 4.8 inches and drops to its lowest point in February with 2.7 inches.
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 31° | 3.2″ | 11 |
| February | 34° | 2.7″ | 9 |
| March | 42° | 3.9″ | 13 |
| April | 53° | 3.9″ | 13 |
| May | 64° | 4.3″ | 14 |
| June | 72° | 3.4″ | 11 |
| July | 76° | 3.7″ | 12 |
| August | 75° | 3.7″ | 12 |
| September | 67° | 4.8″ | 16 |
| October | 55° | 3.4″ | 11 |
| November | 44° | 2.9″ | 10 |
| December | 36° | 3.7″ | 12 |
Regional context
Located within a warm-summer humid continental climate region, Hagerstown shares temperature ranges, seasonal patterns, and growing conditions with other nearby cities in this climate zone.
Similar climates: Baltimore, MD, Frederick, MD, Waldorf, MD, Columbia, MD, Germantown, MD.
Naturalist notes
May brings the return of ruby-throated hummingbirds to Hagerstown's gardens and woodlands after their long migration from Central America.
Dogwood trees typically reach full bloom during late April, their white bracts creating canopies throughout the region's forests and neighborhoods.
Frequently asked
- When does it freeze in Hagerstown?
- Spring's final frost typically occurs around mid-April in Hagerstown, while the first fall frost usually arrives around mid-November.
- What is the rainy season in Hagerstown?
- September records the highest monthly rainfall with about 4.8 inches on average, contributing to the city's annual total of roughly 44 inches.
- What is the warmest month in Hagerstown?
- July typically brings the year's warmest temperatures, averaging about 76°F.
- What is the coldest month in Hagerstown?
- January delivers the coldest temperatures of the year, averaging about 31°F.
- When can I start a vegetable garden in Hagerstown?
- Cool-season crops like peas and lettuce can be planted around the last spring frost in mid-April, while warm-season varieties such as tomatoes and peppers should wait until 1–2 weeks after.
- How many rainy days does Hagerstown get?
- Hagerstown records about 144 rainy days per year on average.
- What hardiness zone is Hagerstown?
- Hagerstown's USDA hardiness zone depends on its lowest average winter temperature; the USDA's online lookup tool using the city ZIP code provides the current zone designation.
Climate
Hagerstown, Maryland experiences a warm-summer humid continental climate. Winter temperatures in January hover near 31°F, while July averages reach 76°F, creating a 45°F seasonal swing.
Annual precipitation totals about 44 inches, falling across roughly 144 rainy days throughout the year.
Location at 39.6°N latitude, along with proximity to large water bodies and local elevation, determines the rhythm of seasons. These factors influence plant growth cycles, frost timing, and daily weather patterns.