Warrenton, Virginia climate: Normal weather by month, frost dates and records
Warrenton's normal year runs from 25°F January nights to 85°F July afternoons. (NOAA 1991-2020 normals)
In metric: a yearly mean of 12.7°C, January lows of −4°C, July highs of 29°C.
- NOAA stationWarrenton (3 mi SE)
- Station IDUSC00448888
- Location38.68°N 77.77°W
- Elevation500 ft (152 m)
- Population10,224
On October 23, the normal high in Warrenton is 64°F and the normal low 43°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Warrenton.
- Jan 42° 25°
- Feb 46° 27°
- Mar 54° 34°
- Apr 66° 44°
- May 73° 52°
- Jun 81° 61°
- Jul 85° 66°
- Aug 84° 64°
- Sep 78° 58°
- Oct 67° 46°
- Nov 56° 37°
- Dec 46° 29°
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 Warrenton each month?
July is the warmest month, with normal highs of 85°F; January the coldest, with normal lows of 25°F.
| Month | High | Low | Mean | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|
| January | 42°F | 25°F | 33.5°F | – | <1 | 25 | 9 h 40 min |
| February | 46°F | 27°F | 36.1°F | – | <1 | 22 | 10 h 40 min |
| March | 54°F | 34°F | 43.7°F | – | <1 | 14 | 11 h 50 min |
| April | 66°F | 44°F | 54.7°F | – | <1 | 2 | 13 h 10 min |
| May | 73°F | 52°F | 62.5°F | – | 1 | <1 | 14 h 10 min |
| June | 81°F | 61°F | 70.9°F | – | 3 | <1 | 14 h 50 min |
| July | 85°F | 66°F | 75.4°F | – | 8 | <1 | 14 h 40 min |
| August | 84°F | 64°F | 74.0°F | – | 7 | <1 | 13 h 40 min |
| September | 78°F | 58°F | 67.6°F | – | 3 | <1 | 12 h 30 min |
| October | 67°F | 46°F | 56.3°F | – | <1 | 2 | 11 h 20 min |
| November | 56°F | 37°F | 46.3°F | – | <1 | 11 | 10 h 10 min |
| December | 46°F | 29°F | 37.3°F | – | <1 | 22 | 9 h 30 min |
| Year (annual) | 65°F | 45°F | 54.9°F | – | 21 | 98 |
The same normals in °C and millimetres
| Month | High | Low | Mean |
|---|---|---|---|
| January | 6°C | −4°C | 0.8°C |
| February | 8°C | −3°C | 2.3°C |
| March | 12°C | 1°C | 6.5°C |
| April | 19°C | 7°C | 12.6°C |
| May | 23°C | 11°C | 16.9°C |
| June | 27°C | 16°C | 21.6°C |
| July | 29°C | 19°C | 24.1°C |
| August | 29°C | 18°C | 23.3°C |
| September | 25°C | 14°C | 19.8°C |
| October | 19°C | 8°C | 13.5°C |
| November | 13°C | 3°C | 7.9°C |
| December | 8°C | −2°C | 2.9°C |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Sterling (24 miles away), gets 21 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00448888; 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 Warrenton?
Normal highs sit between 65°F and 85°F in April, May, June, July, August, September and October.
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 USC00448888.
When is the last frost in Warrenton?
In Warrenton, the last spring frost (32°F) comes after April 9 in half of years and after April 28 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 91 year in 10 after April 28; 9 in 10 after March 26
- First autumn frost, half of years before
- November 11 year in 10 before October 18; 9 in 10 before November 14
NOAA puts the median frost-free season at 205 days, and the season without a hard freeze (28°F) at 229 days.
A hard freeze (28°F) comes after March 29 in half of springs and before November 14 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Warrenton in zone 7a in ZIP code 20186, 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 USC00448888; 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 Warrenton?
In a normal year in Warrenton, 21 days a year reach 90°F and 98 nights fall to 32°F or colder.
- Days at 90°F or more
- 21a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 98a normal year
- Days that stay below freezing
- 13high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00448888.
How sunny is Warrenton?
Over a year 75% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Warrenton, 4.1 kWh per square metre a day. July is the sunniest month (80%) and January the cloudiest (70%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 70% | 2.2 |
| February | 70% | 3.0 |
| March | 71% | 4.0 |
| April | 72% | 5.0 |
| May | 73% | 5.6 |
| June | 79% | 6.2 |
| July | 80% | 6.0 |
| August | 79% | 5.4 |
| September | 76% | 4.4 |
| October | 74% | 3.3 |
| November | 75% | 2.5 |
| December | 70% | 1.9 |
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 Warrenton need?
A normal year in Warrenton brings 4,685 heating degree days, 13% fewer than the median U.S. place (5,373), and 1,018 cooling degree days, 12% more than the median (908). Six months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 3,630 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 976 | 0 |
| February | 809 | 0 |
| March | 662 | 2 |
| April | 326 | 16 |
| May | 137 | 58 |
| June | 20 | 199 |
| July | 1 | 321 |
| August | 2 | 279 |
| September | 48 | 126 |
| October | 284 | 16 |
| November | 560 | 1 |
| December | 859 | 0 |
| Year (annual) | 4,685 | 1,018 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00448888. 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 Warrenton's climate compare?
Warrenton is warmer than 33 of the other 80 places with their own NOAA record in Virginia. Across the 7,247 U.S. stations with normals, its annual mean of 54.9°F is warmer than 60%.
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers.
Which places near Warrenton share this climate record?
9 places have no NOAA station with 1991-2020 normals of their 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.
- New Baltimore, VA11,595 people · 5 mi NE
- Bealeton, VA5,193 people · 7 mi S
- Marshall, VA3,213 people · 13 mi N
- Opal, VA784 people · 5 mi SW
- Remington, VA643 people · 10 mi S
- The Plains, VA255 people · 12 mi N
- Midland, VA213 people · 6 mi SE
- Catlett, VA139 people · 8 mi E
- Calverton, VA59 people · 6 mi SE
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 Warrenton's climate
What is the coldest month in Warrenton?
January, with a normal high of 42°F and a normal low of 25°F. The warmest is July (85°F by day, 66°F at night).
Does it snow in Warrenton?
Yes. NOAA publishes no 1991-2020 snowfall normal for Warrenton's NOAA station; the nearest record that keeps one, Sterling (24 miles away), records 21 inches of snow in a normal year.
What plant hardiness zone is Warrenton in?
The USDA's 2023 map puts Warrenton in zone 7a in ZIP code 20186, the nearest ZIP area.
How late can frost come in Warrenton?
In half of years the last 32°F night comes after April 9; in one year in ten it comes after April 28. Waiting until April 28 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Virginia climateThe statewide normals and every place in the state
- Manassas, VA16 miles from this station, 55.5°F a year
- Boston (4 mi SE), VA20 miles from this station, 54.2°F a year
- Sterling, VA24 miles from this station, 55.7°F a year
- Sperryville, VA25 miles from this station, 54.2°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made