Union Bridge, MD climate
Union Bridge has chilly winters and warm summers. A typical July afternoon reaches 87°, a January night drops to 23°, and about 28 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Union Bridge feels like
Winter
Spring
Summer
Fall
Union Bridge 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 | 40° | 23° | 3.1" | 8.7" | 9 | 6 | 22° – 39° |
| February | 44° | 24° | 2.5" | 8.8" | 8 | 8 | 23° – 42° |
| March | 53° | 31° | 3.7" | 4.4" | 10 | 3 | 36° – 51° |
| April | 65° | 41° | 3.5" | 0.2" | 11 | 0 | 49° – 58° |
| May | 74° | 51° | 4.1" | 0 | 13 | 0 | 58° – 68° |
| June | 82° | 60° | 4.2" | 0 | 11 | 0 | 67° – 74° |
| July | 87° | 65° | 4.4" | 0 | 11 | 0 | 71° – 80° |
| August | 85° | 63° | 3.5" | 0 | 10 | 0 | 70° – 77° |
| September | 78° | 56° | 4.7" | 0 | 9 | 0 | 64° – 71° |
| October | 66° | 44° | 3.9" | 0.1" | 9 | 0 | 52° – 62° |
| November | 54° | 34° | 3.2" | 0.8" | 8 | 0 | 38° – 49° |
| December | 44° | 27° | 3.6" | 4.5" | 9 | 3 | 26° – 46° |
| Year | 64° | 43° | 44.3" | 27.5" | 117 | 21 |
“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 Union Bridge
Union Bridge gets 44 inches of rain and melted snow a year. September is the wettest month and February the driest. Rain or snow falls on about 117 days a year. Snow covers the ground about 21 days of the year.
About 179 frost-free days a year
In half of years the last 32° night comes by April 22 and the first one by October 20. That leaves about 179 frost-free days for gardens, longer than 51% of U.S. towns.
Heating and cooling a home in Union Bridge
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Union Bridge, 85% of that work is heating and 15% is cooling, so the furnace matters far more than the air conditioner.
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.
How Union Bridge 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 Union Bridge averaged 1.5° warmer than the 1900s. The biggest change is in December (+2.8°). The shift is larger than in 73% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Union Bridge’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 26° to 46°. August is the most reliable, staying within 7°.
Common questions about Union Bridge’s climate
What is the coldest month in Union Bridge?
January, with a typical high of 40° and a low of 23°.
What is the hottest month in Union Bridge?
July, with a typical high of 87° and a low of 65°. About 18 days a year reach 90°.
How much snow does Union Bridge get?
About 28 inches in a normal winter, most of it in February.
When is the first frost in Union Bridge?
In half of years the first 32° night comes by October 20, and the last spring frost by April 22.
What is the rainiest month in Union Bridge?
September, with 4.7 inches of rain and melted snow. The year totals 44 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Union Bridge itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Emmitsburg 2 Se, MD (9 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.