Photo: Djembayz · CC BY-SA 3.0A middle-of-the-road climate: Glen Burnie is close to most U.S. towns on every count
Expect July afternoons of about 89°. The wettest month is September; the driest is February. In July, afternoons here are warmer than in 71% of U.S. towns. Homes need heating from November to March, the months averaging under 50°.
A year in Glen Burnie at a glance
Each month’s typical high and low, and what it brings.
What stands out about Glen Burnie’s climate
Compared with towns across the U.S., with Glen Burnie’s place in Maryland beside it.
What a year in Glen Burnie feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 204 frost-free days a year
In half of years the last 32° night comes by April 10 and the first by October 31. Frost and day counts come from NOAA’s station at Baltimore Wash International Airport, 4 miles from the city’s center point, 100 ft higher.
The 2023 USDA map puts Glen Burnie’s center in zone 7b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 10°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 19 inches of snow a winter
Snow, measured at Baltimore Wash International Airport, falls mostly in February. Precipitation (rain plus melted snow) adds up to 46 inches a year; September is the wettest month and February the driest. Rain or snow falls on about 121 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Glen Burnie
77% of the work is heating. Months averaging under 55° run from November through March.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Baltimore Wash International Airport.
Living with Glen Burnie’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
204 frost-free days in zone 7b. The last frost comes by Apr 10 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Oct 31.
Months with highs of 62–84° and lows of 40° or more: April, May, September and October. 3.4 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Glen Burnie from natural hazards, river flooding is the largest share (39%); heat waves, cold waves, winter storms and ice storms together are 20%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Glen Burnie and its neighbors
Severn has the coldest January nights next door (26°, 3° colder). Differences under a degree are within what the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Glen Burnie’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Glen Burnie, MD | 28° | 89° | 46" | 19" |
| Vinton, VA | 27° | 88° | 45" | 15" |
| Henderson, KY | 25° | 88° | 48" | 12" |
| Harrison, AR | 26° | 89° | 47" | 9.5" |
| Aurora, MO | 24° | 89° | 47" | 12" |
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
Warmer than it used to be
The last 30 years in Glen Burnie averaged 1.8° warmer than the 1900s. The biggest change is in December (+2.8°).
A bigger shift than in 82% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Glen Burnie compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Glen Burnie’s place among Maryland’s.
Glen Burnie weather by month
Highs, lows and precipitation from NOAA’s grid at Glen Burnie’s center; snow, wet days and snow on the ground from Baltimore Wash International Airport. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 44° | 28° | 3.1" | 6.4" | 10 | 4 | 28° – 44° |
| February | 47° | 29° | 2.8" | 7.5" | 9 | 5 | 27° – 46° |
| March | 55° | 36° | 4.0" | 2.8" | 11 | 2 | 40° – 55° |
| April | 67° | 46° | 3.5" | 0.0" | 11 | 0 | 53° – 62° |
| May | 75° | 56° | 4.0" | 0.0" | 12 | 0 | 61° – 72° |
| June | 84° | 66° | 4.2" | 0.0" | 11 | 0 | 71° – 80° |
| July | 89° | 71° | 4.5" | 0.0" | 10 | 0 | 75° – 83° |
| August | 87° | 69° | 4.4" | 0.0" | 10 | 0 | 74° – 81° |
| September | 80° | 62° | 4.5" | 0.0" | 9 | 0 | 68° – 75° |
| October | 68° | 50° | 4.0" | 0.0" | 9 | 0 | 56° – 65° |
| November | 57° | 40° | 3.2" | 0.1" | 9 | 0 | 42° – 54° |
| December | 48° | 33° | 3.7" | 2.5" | 10 | 2 | 32° – 51° |
| Year | 67° | 49° | 45.8" | 19.3" | 121 | 13 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 32° to 51°. September is the most reliable, staying within 7°.
Where Glen Burnie’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Glen Burnie’s center.
- Snow: Baltimore Wash International Airport.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Baltimore Wash International Airport, 4 miles from the city’s center point, 100 ft higher; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Glen Burnie’s climate
What is the weather like in Glen Burnie?
A typical July afternoon reaches 89°, a January night drops to 28°, and about 19 inches of snow falls in a normal winter. Milder January nights than 70% of U.S. towns; hotter July afternoons than 71% of U.S. towns.
How cold does it get in Glen Burnie in winter?
January nights average 28°. About 93 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 28°.
How much snow does Glen Burnie get?
About 19 inches in a normal winter at Baltimore Wash International Airport, most of it in February, with snow on the ground about 13 days a year.
How hot does it get in Glen Burnie?
July, with a typical high of 89° and a low of 71°. About 34 days a year reach 90° and 1 reach 100° (Baltimore Wash International Airport).
When is the first and last frost in Glen Burnie?
In half of years the last spring frost (32°) comes by April 10 and the first fall frost by October 31, about 204 frost-free days, at Baltimore Wash International Airport.
What growing zone is Glen Burnie in?
Zone 7b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 10°.
What is the best time of year to visit Glen Burnie?
By one simple rule (highs of 62–84° and lows of 40° or more), April, May, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Glen Burnie getting warmer?
Yes: 1991–2020 averaged 1.8° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 82% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Glen Burnie.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.