Blacksburg climate — normals and trends
Blacksburg (United States) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 11.6 °C and it receives 912 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is July (22.2 °C on average) and the coldest is January (0.5 °C). Rainfall peaks in March.
Blacksburg averages 93 frost days, 15 hot days (≥ 30 °C) and 122 rainy days per year.
Blacksburg has warmed by +1.5 °C between 1940 and 2025, or +0.18 °C per decade. This trend is statistically significant.
The number of frost days there went from about 103 to 83 per year over the period.
The hottest day of the period reached 36.5 °C (on 14 July 1954) and the coldest -27.7 °C (on 21 January 1985).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
BlacksburgVirginia
- coords
- 37.23°, -80.41°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
11.6°C
Average daily high
17.1°C
Average daily low
6.8°C
Annual rainfall
912mm
Sunshine / day
9.0h
Mean relative humidity
71%
Average peak wind
14.7km/h
Seasonal range
21.7°C
Frost days (< 0 °C)
93 d/yr
Hot days (≥ 30 °C)
15 d/yr
Rainy days (≥ 1 mm)
122 d/yr
Annual snowfall
50.9 cm
Average feels-like high
15.7 °C
Average feels-like low
4.7 °C
Average peak gust
39.5 km/h
Tropical nights (≥ 20 °C)
8 d/yr
Solar radiation
15.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.5 °C
since 1940
+0.2 °C per decade · r² = 0.37 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
36.5 °C
14 July 1954
Coldest day
-27.7 °C
21 January 1985
Wettest day
122 mm
18 August 1985
Windiest day
46.1 km/h
22 September 1989
Strongest gust
127.8 km/h
22 September 1989
Hottest feels-like
39.7 °C
14 July 1954
Coldest feels-like
-34.8 °C
21 January 1985
Snowiest day
41.5 cm
13 March 1993
Sunniest day
14.6 h
16 June 2021
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 3.2 °C | -2.1 °C | 79 mm | -0 mm |
| Feb | 8.6 °C | +1.3 °C | 109 mm | +32 mm |
| Mar | 16.1 °C | +4.2 °C | 40 mm | -50 mm |
| Apr | 20.2 °C | +2.5 °C | 60 mm | -20 mm |
| May | 21.1 °C | -0.5 °C | 118 mm | +36 mm |
| Jun | 29.1 °C | +3.5 °C | 59 mm | -14 mm |
| Jul | 30.8 °C | +3.3 °C | 53 mm | -22 mm |
| Aug | 25.6 °C | -1.3 °C | 55 mm | -19 mm |
| Sep | 24.7 °C | +1.1 °C | 50 mm | -24 mm |
| Oct | 18.1 °C | -0.1 °C | 52 mm | -16 mm |
| Nov | 13.2 °C | +1.1 °C | 24 mm | -42 mm |
| Dec | 7.0 °C | 0.0 °C | 53 mm | -22 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Blacksburg?
Blacksburg has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 11.6 °C and it receives 912 mm of precipitation per year.
What is the hottest day ever recorded in Blacksburg?
The hottest day measured in Blacksburg between 1940 and 2025 was 14 July 1954, reaching 36.5 °C.
What is the coldest day in Blacksburg?
The coldest day measured in Blacksburg between 1940 and 2025 was 21 January 1985, at -27.7 °C.
Does it snow in Blacksburg?
Yes. Blacksburg gets on average 50.9 cm of snow per year and has around 93 frost days.
Has the climate of Blacksburg warmed?
Yes: Blacksburg warmed by +1.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Blacksburg?
The wettest day measured in Blacksburg between 1940 and 2025 was 18 August 1985, with 122 mm of rain in 24 hours.
What was the windiest day in Blacksburg?
The windiest day measured in Blacksburg between 1940 and 2025 was 22 September 1989, with winds reaching 46.1 km/h.
What is the warmest month in Blacksburg?
The warmest month in Blacksburg is July (22.2 °C on average); the coldest is January (0.5 °C).
How much does it rain in Blacksburg?
Blacksburg receives on average 912 mm of precipitation per year, spread over about 122 rainy days.
Is it sunny in Blacksburg?
Blacksburg gets on average 9.0 hours of sunshine per day, roughly 3,285 hours per year over 1940-2025.
What is the biggest single-day snowfall in Blacksburg?
The heaviest 24-hour snowfall measured in Blacksburg between 1940 and 2025 was 13 March 1993, with 41.5 cm.
Are there tropical nights in Blacksburg?
Yes: Blacksburg has on average 8 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Blacksburg?
In Blacksburg, between 1940 and 2025, the highest apparent temperature reached 39.7 °C on 14 July 1954, and the lowest was -34.8 °C on 21 January 1985.
Compare Blacksburg with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Blacksburg