Brunswick, Maryland Weather
Fireflies rise from the lawn. Day 77 of spring. Read this microseason across nine climate regions →
Brunswick weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast——85°52°—
- FridayJun 5Overcast——90°60°+5°
- SaturdayJun 6Overcast23%—89°65°-1°
- SundayJun 7Light Drizzle23%—83°65°-6°
- MondayJun 8Overcast——77°57°-6°
- TuesdayJun 9Overcast——81°52°+4°
- WednesdayJun 10Overcast——85°57°+4°
Ozone at AQI 70 — peak already passed at 1 PM under clear skies. AQI up 23 in the last 6 hours — air quality is degrading. Levels should ease through evening.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 70 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 70
- UV peak
- 6.2 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 70
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 3:36 AM
- Moonset
- 1:12 PM
- In sign
- ♒︎ Aquarius
Fireflies rise from the lawn
Brunswick at a glance
- Today vs. normal: 9°F above the seasonal normal for this latitude
- Last frost: April 12 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 4, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
SPC Convective Outlook
Storm Prediction Center — Brunswick
SPC has placed Brunswick in the General Thunderstorms category for severe thunderstorms day after tomorrow.
- TODAYNONENo severe risk
- TOMORROWNONENo severe risk
- DAY 3TSTMGeneral Thunderstorms
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.
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
Brunswick's warmest month is July (~74°F mean) and its coldest is January (~31°F). Rainfall peaks in May (4.6 inches) and bottoms out in February (2.4 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 31° | 3.1″ | 10 |
| February | 34° | 2.4″ | 8 |
| March | 41° | 3.7″ | 12 |
| April | 52° | 3.6″ | 12 |
| May | 61° | 4.6″ | 15 |
| June | 70° | 4.2″ | 14 |
| July | 74° | 4.3″ | 14 |
| August | 73° | 3.3″ | 11 |
| September | 66° | 4.4″ | 15 |
| October | 54° | 3.4″ | 11 |
| November | 44° | 3.1″ | 10 |
| December | 35° | 3.5″ | 12 |
Regional context
Brunswick's baseline climate, derived from NOAA NCEI 1991-2020 normals at the nearest reporting station, swings from a January mean of 31°F to a July mean of 74°F — a 43°F seasonal arc typical of the mid-latitude bands. Annual precipitation runs about 43.5 inches spread across roughly 144 days with measurable rain or snow each year.
Rainfall stays relatively even across the calendar: May tops out at 4.6 inches across 15.0 days with measurable rain, and February settles around 2.4 inches across 8.0 rainy days — a comparatively narrow seasonal range. That even-rainfall rhythm puts Brunswick alongside places like Rosemont, MD, Garretts Mill, MD and Sandy Hook, MD — places without a single dominant storm season, where moisture arrives steadily across the calendar.
The frost-sensitive growing window opens around mid-April, when overnight lows reliably clear freezing for cool-season crops like peas, lettuce, spinach, and radishes. Heat-loving transplants like tomatoes, peppers, and squash generally hold off for another 10-14 days to clear the last spring frost risk window. The window closes around mid-November, when overnight lows resume dipping below freezing and frost-tender plants need protection or harvest. The dates above are 1991-2020 normals; in a given year either bookend can move 1-2 weeks either direction. Within Brunswick, low-lying parcels along drainage features typically lose 4-7°F of overnight low temperature versus the bench positions on calm clear nights, which shifts the working last-frost date by a week or more.
Similar climates: Rosemont, MD, Garretts Mill, MD, Sandy Hook, MD, Brownsville, MD, Yarrowsburg, MD.
Frequently asked
- When does it freeze in Brunswick?
- Brunswick's last spring frost typically falls around mid-April, and the first fall frost arrives around mid-November.
- What is the rainy season in Brunswick?
- May is the wettest month with about 4.6 inches of rain on average; the city receives roughly 43 inches annually.
- What is the warmest month in Brunswick?
- July is typically warmest, averaging about 74°F.
- What is the coldest month in Brunswick?
- January is typically coldest, averaging about 31°F.
- When can I start a vegetable garden in Brunswick?
- Cool-season crops (peas, lettuce) can be sown around the last spring frost (mid-April); warm-season crops (tomatoes, peppers) wait until 1–2 weeks after.
- How many rainy days does Brunswick get?
- Brunswick averages about 144 rainy days per year.
- What hardiness zone is Brunswick?
- Brunswick's USDA hardiness zone is determined by its lowest average winter temperature; check the USDA's online lookup with the city ZIP for the current zone designation.
Climate
Brunswick, Maryland sits in a warm-summer humid continental climate zone. January means hover near 31°F while July averages 74°F — a 43°F seasonal swing.
Across the year, Brunswick receives about 43 inches of precipitation spread over roughly 144 rainy days.
The rhythm of the year is set by latitude (39.3°N), proximity to large water bodies, and elevation — all of which shape what grows here, when frost is likely, and what the weather story looks like day to day.