Dundalk, MD climate
Dundalk has chilly winters and warm summers. A typical July afternoon reaches 89°, a January night drops to 28°, and about 19 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Dundalk feels like
Winter
Spring
Summer
Fall
Dundalk weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 43° | 28° | 3.2" | 6.4" | 10 | 4 | 27° – 43° |
| February | 46° | 29° | 2.8" | 7.5" | 9 | 5 | 26° – 45° |
| March | 54° | 36° | 4.1" | 2.8" | 11 | 2 | 39° – 54° |
| April | 67° | 46° | 3.6" | 0 | 11 | 0 | 52° – 61° |
| May | 75° | 56° | 4.1" | 0 | 12 | 0 | 61° – 72° |
| June | 85° | 65° | 4.1" | 0 | 11 | 0 | 72° – 80° |
| July | 89° | 71° | 4.6" | 0 | 10 | 0 | 75° – 84° |
| August | 87° | 69° | 4.5" | 0 | 10 | 0 | 74° – 81° |
| September | 80° | 62° | 4.6" | 0 | 9 | 0 | 68° – 75° |
| October | 68° | 50° | 4.1" | 0 | 9 | 0 | 56° – 66° |
| November | 57° | 39° | 3.4" | 0.1" | 9 | 0 | 42° – 53° |
| December | 48° | 32° | 3.8" | 2.5" | 10 | 2 | 32° – 50° |
| Year | 67° | 49° | 46.9" | 19.3" | 121 | 13 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in Dundalk
Dundalk gets 47 inches of rain and melted snow a year. July is the wettest month and February the driest. Rain or snow falls on about 121 days a year. Snow covers the ground about 13 days of the year.
About 244 frost-free days a year
In half of years the last 32° night comes by March 24 and the first one by November 21. That leaves about 244 frost-free days for gardens, longer than 89% of U.S. towns.
Heating and cooling a home in Dundalk
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Dundalk, 69% of that work is heating and 31% is cooling.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
Dundalk and its neighbors
Dundalk borders 4 towns with climate data. January nights across them vary by 0.9°. Essex has the coldest January nights (27°) and Baltimore the hottest July afternoons (89°). Dundalk’s January low is 28° and its July high 89°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Dundalk compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Warmer than it used to be
The last 30 years in Dundalk averaged 1.9° warmer than the 1900s. The biggest change is in December (+3.0°). The shift is larger than in 90% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Dundalk’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. December swings the most: between 1991 and 2020 its average temperature ranged from 32° to 50°. August is the most reliable, staying within 7°.
Common questions about Dundalk’s climate
What is the coldest month in Dundalk?
January, with a typical high of 43° and a low of 28°.
What is the hottest month in Dundalk?
July, with a typical high of 89° and a low of 71°. About 43 days a year reach 90°.
How much snow does Dundalk get?
About 19 inches in a normal winter, most of it in February.
When is the first frost in Dundalk?
In half of years the first 32° night comes by November 21, and the last spring frost by March 24.
What is the rainiest month in Dundalk?
July, with 4.6 inches of rain and melted snow. The year totals 47 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Dundalk itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Baltimore Wash Intl Airport, MD (12 mi, snow) and Md Sci Ctr Baltimore, MD (6 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.