Calverton has chilly winters and warm summers
A typical July afternoon reaches 88°, a January night drops to 25°, and about 21 inches of snow falls in a normal winter.
A year in Calverton at a glance
Each month’s typical high and low, and what it brings.
What stands out about Calverton’s climate
Read from where Calverton sits among Virginia’s towns. The page puts what stands out first.
Warmer than it used to be
The last 30 years in Calverton averaged 1.8° warmer than the 1900s. The biggest change is in December (+3.1°).
A bigger shift than in 89% of U.S. towns.
Change by month
21 inches of snow, 42 of rain and melt
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
What a year in Calverton feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 205 frost-free days a year
In half of years the last 32° night comes by April 9 and the first by November 1.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
Living with Calverton’s climate
What the numbers mean for a garden, a driveway, a furnace and a free afternoon.
205 frost-free days. 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 Nov 1.
About 21" a winter over 5 days with an inch or more, most in February. Snow covers the ground about 14 days a year.
Months averaging under 55° run from November through March. Heating is 82% of the year’s heating-and-cooling load.
About 21 days a year reach 90°, and July afternoons average 88°.
The nicest months are April, May, June, September and October. 1.2 miles of trails are waiting.
Parks & trails →Normals are averages. Ice storms, nor’easters, floods and heat waves are on the natural hazards page.
Natural hazards →How Calverton compares
Against every U.S. town on TownTapestry, each counted once, with its place in Virginia.
Calverton 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 | 44° | 25° | 2.9" | 6.9" | 10 | 4 | 26° – 42° |
| February | 48° | 27° | 2.4" | 7.0" | 9 | 5 | 28° – 45° |
| March | 57° | 34° | 3.3" | 3.9" | 11 | 2 | 39° – 56° |
| April | 68° | 43° | 3.3" | 0.1" | 11 | 0 | 52° – 61° |
| May | 76° | 53° | 4.2" | 0 | 13 | 0 | 60° – 70° |
| June | 84° | 62° | 4.2" | 0 | 11 | 0 | 68° – 77° |
| July | 88° | 67° | 4.0" | 0 | 11 | 0 | 73° – 81° |
| August | 86° | 65° | 3.6" | 0 | 9 | 0 | 71° – 79° |
| September | 79° | 58° | 4.3" | 0 | 9 | 0 | 65° – 73° |
| October | 68° | 46° | 3.6" | 0 | 8 | 0 | 52° – 63° |
| November | 58° | 36° | 3.0" | 0.3" | 9 | 0 | 41° – 52° |
| December | 48° | 29° | 3.3" | 2.8" | 10 | 2 | 29° – 49° |
| Year | 67° | 45° | 42.2" | 21.0" | 121 | 14 |
Heating and cooling a home in Calverton
82% of the work is heating, so the furnace matters far more than the air conditioner.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. Source: NOAA station normals.
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°.
Common questions about Calverton’s climate
What is the coldest month in Calverton?
January, with a typical high of 44° and a low of 25°.
What is the hottest month in Calverton?
July, with a typical high of 88° and a low of 67°. About 21 days a year reach 90°.
How much snow does Calverton get?
About 21 inches in a normal winter, most of it in February.
When is the first frost in Calverton?
In half of years the first 32° night comes by November 1, and the last spring frost by April 9.
What is the rainiest month in Calverton?
September, with 4.3 inches of rain and melted snow. The year totals 42 inches.
Neighbors talk weather
Gardens, snow, and the best days of the year in Calverton.
Your answer becomes a post in Town Square.
Temperatures and rainfall come from NOAA’s gridded climate normals for Calverton itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Washington Dc Dulles Airport, VA (24 mi, snow) and Warrenton 3 Se, VA (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. Today’s forecast: National Weather Service.