Keysville, Virginia climate: Normal weather by month, frost dates and records
Keysville's normal year runs from 26°F January nights to 88°F July afternoons, with 43.9 inches of precipitation and 5 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 14.1°C, January lows of −3°C, July highs of 31°C, 1,114 mm of precipitation a year.
- NOAA stationKeysville (2 mi S)
- Station IDUSC00444568
- Location37.02°N 78.48°W
- Elevation625 ft (191 m)
- Population786
On October 22, the normal high in Keysville is 69°F and the normal low 43°F, and the chance of measurable rain or snow is 25%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Keysville.
- Jan 48° 26°
- Feb 52° 28°
- Mar 59° 34°
- Apr 70° 44°
- May 77° 52°
- Jun 84° 63°
- Jul 88° 67°
- Aug 87° 66°
- Sep 81° 58°
- Oct 71° 46°
- Nov 60° 35°
- Dec 51° 30°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Keysville each month?
July is the warmest month, with normal highs of 88°F; January the coldest, with normal lows of 26°F. The most precipitation falls in July (4.34 in), the least in February (2.34 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 48°F | 26°F | 36.9°F | 3.17 | 2.2 | 8 | <1 | 20 | 9 h 50 min |
| February | 52°F | 28°F | 40.1°F | 2.34 | 0.6 | 7 | <1 | 15 | 10 h 50 min |
| March | 59°F | 34°F | 46.7°F | 3.90 | 0.2 | 9 | <1 | 14 | 11 h 50 min |
| April | 70°F | 44°F | 56.6°F | 3.37 | 0.0 | 9 | <1 | 4 | 13 h 10 min |
| May | 77°F | 52°F | 64.5°F | 4.23 | 0.0 | 10 | 2 | 1 | 14 h 10 min |
| June | 84°F | 63°F | 73.3°F | 3.68 | 0.0 | 9 | 5 | <1 | 14 h 40 min |
| July | 88°F | 67°F | 77.8°F | 4.34 | 0.0 | 9 | 18 | <1 | 14 h 30 min |
| August | 87°F | 66°F | 76.4°F | 3.91 | 0.0 | 8 | 11 | <1 | 13 h 40 min |
| September | 81°F | 58°F | 69.9°F | 4.30 | 0.0 | 8 | 5 | <1 | 12 h 30 min |
| October | 71°F | 46°F | 58.6°F | 3.75 | 0.0 | 7 | 1 | 1 | 11 h 20 min |
| November | 60°F | 35°F | 47.4°F | 3.43 | 0.0 | 8 | <1 | 10 | 10 h 10 min |
| December | 51°F | 30°F | 40.3°F | 3.43 | 1.5 | 8 | <1 | 18 | 9 h 40 min |
| Year (annual) | 69°F | 46°F | 57.3°F | 43.85 | 4.5 | 100 | 41 | 83 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 9°C | −3°C | 2.7°C | 81 mm | 6 cm |
| February | 11°C | −2°C | 4.5°C | 59 mm | 2 cm |
| March | 15°C | 1°C | 8.2°C | 99 mm | 1 cm |
| April | 21°C | 6°C | 13.7°C | 86 mm | 0 cm |
| May | 25°C | 11°C | 18.1°C | 107 mm | 0 cm |
| June | 29°C | 17°C | 22.9°C | 93 mm | 0 cm |
| July | 31°C | 19°C | 25.4°C | 110 mm | 0 cm |
| August | 31°C | 19°C | 24.7°C | 99 mm | 0 cm |
| September | 27°C | 15°C | 21.1°C | 109 mm | 0 cm |
| October | 22°C | 8°C | 14.8°C | 95 mm | 0 cm |
| November | 15°C | 2°C | 8.6°C | 87 mm | 0 cm |
| December | 10°C | −1°C | 4.6°C | 87 mm | 4 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00444568; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Keysville?
Normal highs sit between 65°F and 85°F in April, May, June, September and October. Of those, October has the fewest days with rain (7).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00444568.
When is the last frost in Keysville?
In Keysville, the last spring frost (32°F) comes after April 8 in half of years and after April 25 in one year in ten; the first autumn frost comes before November 1 in half of years and before October 18 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- April 81 year in 10 after April 25; 9 in 10 after March 24
- First autumn frost, half of years before
- November 11 year in 10 before October 18; 9 in 10 before November 13
NOAA puts the median frost-free season at 206 days, and the season without a hard freeze (28°F) at 230 days.
A hard freeze (28°F) comes after March 27 in half of springs and before November 11 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Keysville in zone 7b in ZIP code 23947, the nearest ZIP area.
Frost dates for every NOAA station in Virginia · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00444568; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Keysville?
In a normal year in Keysville, 41 days a year reach 90°F (1 of them 100°F or more), 83 nights fall to 32°F or colder and 100 days bring measurable precipitation.
- Days at 90°F or more
- 41a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 83a normal year
- Days that stay below freezing
- 4high of 32°F or less
- Days with 0.01 inch of precipitation
- 100a normal year
- Days with 1 inch of snow or more
- 1a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00444568.
How sunny is Keysville?
Over a year 76% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Keysville, 4.3 kWh per square metre a day. July is the sunniest month (80%) and February the cloudiest (72%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 73% | 2.4 |
| February | 72% | 3.1 |
| March | 72% | 4.2 |
| April | 74% | 5.3 |
| May | 75% | 5.8 |
| June | 80% | 6.3 |
| July | 80% | 6.1 |
| August | 79% | 5.4 |
| September | 76% | 4.5 |
| October | 75% | 3.5 |
| November | 77% | 2.7 |
| December | 72% | 2.1 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Keysville need?
A normal year in Keysville brings 4,087 heating degree days, 24% fewer than the median U.S. place (5,373), and 1,326 cooling degree days, 46% more than the median (908). Five months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 4,123 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 872 | 0 |
| February | 699 | 0 |
| March | 570 | 3 |
| April | 275 | 21 |
| May | 102 | 86 |
| June | 5 | 252 |
| July | 0 | 395 |
| August | 1 | 353 |
| September | 35 | 180 |
| October | 234 | 35 |
| November | 529 | 1 |
| December | 767 | 0 |
| Year (annual) | 4,087 | 1,326 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00444568. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
How does Keysville's climate compare?
Keysville is warmer than 51 of the other 80 places with their own NOAA record in Virginia, and wetter than 25. Across the 7,247 U.S. stations with normals, its annual mean of 57.3°F is warmer than 67%.
In the Köppen classification computed from these normals, Keysville is Cfa: temperate, no dry season, hot summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Keysville share this climate record?
Lunenburg has no NOAA station with 1991-2020 normals of its own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Lunenburg, VA16 people · 12 mi E
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Keysville's climate
What is the coldest month in Keysville?
January, with a normal high of 48°F and a normal low of 26°F. The warmest is July (88°F by day, 67°F at night).
Does it snow in Keysville?
Yes: 5 inches in a normal year, falling on 2 days with 0.1 inch or more, the most in January (2.2 inches).
What is the rainiest month in Keysville?
July, with 4.34 in of precipitation in a normal year; the driest is February with 2.34 in.
What plant hardiness zone is Keysville in?
The USDA's 2023 map puts Keysville in zone 7b in ZIP code 23947, the nearest ZIP area.
How late can frost come in Keysville?
In half of years the last 32°F night comes after April 8; in one year in ten it comes after April 25. Waiting until April 25 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Virginia climateThe statewide normals and every place in the state
- Charlotte Court House, VA10 miles from this station, 57.3°F a year
- Greenbay (3 mi NE), VA16 miles from this station, 57.6°F a year
- Chase City, VA17 miles from this station, 58.6°F a year
- Farmville, VA22 miles from this station, 57.2°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made