Glen Echo Park Historic District · Photo: Mary Ann Daly · CC BY-SA 3.0No extremes in Brookmont: its weather tracks the middle of U.S. towns
July afternoons average 87°. Temperatures cover 61° across the year, low to high. Winters are mild: January nights here are milder than in 66% of U.S. towns. Warm coats and heating bills mark the months from November to March, when means dip under 50°.
A year in Brookmont at a glance
Each month’s typical high and low, and what it brings.
What stands out about Brookmont’s climate
Compared with towns across the U.S., with Brookmont’s place in Maryland beside it.
What a year in Brookmont feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 202 frost-free days a year
In half of years the last 32° night comes by April 9 and the first by October 31. Frost and day counts come from NOAA’s station at Dalecarlia Reservoir, MD, 1.4 miles from the town’s center, at about the same height.
The 2023 USDA map puts Brookmont’s center in zone 7b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 8°. 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 6 inches of snow a winter
Snow, measured at Dalecarlia Reservoir, MD, falls mostly in January. Precipitation (rain plus melted snow) adds up to 44 inches a year; July is the wettest month and February the driest. Rain or snow falls on about 123 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Brookmont
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 Dalecarlia Reservoir, MD.
Living with Brookmont’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
202 frost-free days in zone 7b. The last frost comes by Apr 9 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, June, September and October. 7.1 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Brookmont from natural hazards, river flooding is the largest share (63%); heat waves, cold waves, winter storms and ice storms together are 11%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Brookmont and its neighbors
Washington the hottest July afternoons (89°, 1° warmer). Differences under a degree are within what the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Brookmont’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 |
|---|---|---|---|---|
| Brookmont, MD | 26° | 87° | 44" | 5.8" |
| Kingsport, TN | 28° | 87° | 45" | 5.1" |
| South Boston, VA | 27° | 88° | 46" | 5.5" |
| Ashland, KY | 24° | 87° | 45" | 6.2" |
| Ironton, OH | 24° | 87° | 44" | 6.2" |
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 Brookmont averaged 1.7° warmer than the 1900s. The biggest change is in December (+2.9°).
A bigger shift than in 69% 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 Brookmont compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Brookmont’s place among Maryland’s.
Brookmont weather by month
Highs, lows and precipitation from NOAA’s grid at Brookmont’s center; snow, wet days and snow on the ground from Dalecarlia Reservoir, MD. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 43° | 26° | 3.0" | 2.9" | 10 | 2 | 27° – 42° |
| February | 46° | 28° | 2.7" | 1.4" | 9 | 2 | 26° – 44° |
| March | 55° | 34° | 3.7" | 0.7" | 12 | 1 | 38° – 54° |
| April | 66° | 44° | 3.4" | 0.0" | 11 | 0 | 52° – 60° |
| May | 75° | 54° | 4.3" | 0.0" | 12 | 0 | 60° – 70° |
| June | 83° | 63° | 4.2" | 0.0" | 10 | 0 | 69° – 77° |
| July | 87° | 68° | 4.5" | 0.0" | 10 | 0 | 73° – 81° |
| August | 86° | 66° | 3.7" | 0.0" | 10 | 0 | 71° – 79° |
| September | 79° | 59° | 4.3" | 0.0" | 10 | 0 | 66° – 73° |
| October | 68° | 47° | 3.8" | 0.0" | 9 | 0 | 54° – 64° |
| November | 57° | 37° | 3.1" | 0.0" | 9 | 0 | 41° – 52° |
| December | 47° | 30° | 3.6" | 0.8" | 11 | 1 | 29° – 49° |
| Year | 66° | 46° | 44.2" | 5.8" | 123 | 6 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 29° to 49°. September is the most reliable, staying within 8°.
Where Brookmont’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 Brookmont’s center.
- Snow: Dalecarlia Reservoir, MD (NOAA station in town).
- Frost, freezing nights, 90° and 100° days, heating and cooling: Dalecarlia Reservoir, MD, 1.4 miles from the town’s center, at about the same height; 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 Brookmont’s climate
What is the weather like in Brookmont?
A typical July afternoon reaches 87°, a January night drops to 26°, and about 6 inches of snow falls in a normal winter. Milder January nights than 66% of U.S. towns; hotter July afternoons than 64% of U.S. towns.
How cold does it get in Brookmont in winter?
January nights average 26°. About 96 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 27°.
How much snow does Brookmont get?
About 5.8 inches in a normal winter at Dalecarlia Reservoir, MD, most of it in January, with snow on the ground about 6 days a year.
How hot does it get in Brookmont?
July, with a typical high of 87° and a low of 68°. About 44 days a year reach 90° and 2 reach 100° (Dalecarlia Reservoir, MD).
When is the first and last frost in Brookmont?
In half of years the last spring frost (32°) comes by April 9 and the first fall frost by October 31, about 202 frost-free days, at Dalecarlia Reservoir, MD.
What growing zone is Brookmont in?
Zone 7b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 8°.
What is the best time of year to visit Brookmont?
By one simple rule (highs of 62–84° and lows of 40° or more), April, May, June, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Brookmont getting warmer?
Yes: 1991–2020 averaged 1.7° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 69% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Brookmont.
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.