Carrboro climate — normals and trends
Carrboro (United States) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 15.5 °C and it receives 1,105 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 (25.8 °C on average) and the coldest is January (4.7 °C). Rainfall peaks in July.
Carrboro averages 48 frost days, 65 hot days (≥ 30 °C) and 122 rainy days per year.
Carrboro has warmed by +1.2 °C between 1940 and 2025, or +0.14 °C per decade. This trend is statistically significant.
The number of frost days there went from about 53 to 43 per year over the period.
The hottest day of the period reached 41.0 °C (on 29 June 2012) and the coldest -20.5 °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
CarrboroNorth Carolina
- coords
- 35.91°, -79.08°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
15.5°C
Average daily high
20.9°C
Average daily low
10.9°C
Annual rainfall
1,105mm
Sunshine / day
9.1h
Mean relative humidity
70%
Average peak wind
14.8km/h
Seasonal range
21.1°C
Frost days (< 0 °C)
48 d/yr
Hot days (≥ 30 °C)
65 d/yr
Rainy days (≥ 1 mm)
122 d/yr
Annual snowfall
17.7 cm
Average feels-like high
20.7 °C
Average feels-like low
9.5 °C
Average peak gust
34.6 km/h
Tropical nights (≥ 20 °C)
76 d/yr
Solar radiation
15.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.2 °C
since 1940
+0.1 °C per decade · r² = 0.28 · 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
41.0 °C
29 June 2012
Coldest day
-20.5 °C
21 January 1985
Wettest day
123 mm
28 December 1958
Windiest day
57.1 km/h
6 September 1996
Strongest gust
139.3 km/h
6 September 1996
Hottest feels-like
44.2 °C
29 June 2012
Coldest feels-like
-26.9 °C
21 January 1985
Snowiest day
30.5 cm
1 March 1969
Sunniest day
14.1 h
20 June 2025
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 | 7.8 °C | -1.9 °C | 37 mm | -52 mm |
| Feb | 13.2 °C | +1.5 °C | 85 mm | -1 mm |
| Mar | 20.0 °C | +3.9 °C | 58 mm | -45 mm |
| Apr | 24.1 °C | +2.6 °C | 88 mm | +4 mm |
| May | 25.5 °C | -0.1 °C | 156 mm | +67 mm |
| Jun | 31.2 °C | +1.7 °C | 84 mm | -7 mm |
| Jul | 32.0 °C | +1.0 °C | 204 mm | +84 mm |
| Aug | 27.3 °C | -2.7 °C | 154 mm | +49 mm |
| Sep | 26.6 °C | -0.3 °C | 83 mm | -17 mm |
| Oct | 20.7 °C | -1.0 °C | 63 mm | -14 mm |
| Nov | 17.5 °C | +1.4 °C | 46 mm | -34 mm |
| Dec | 10.6 °C | -0.6 °C | 53 mm | -29 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 Carrboro?
Carrboro has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 15.5 °C and it receives 1,105 mm of precipitation per year.
What is the hottest day ever recorded in Carrboro?
The hottest day measured in Carrboro between 1940 and 2025 was 29 June 2012, reaching 41.0 °C.
What is the coldest day in Carrboro?
The coldest day measured in Carrboro between 1940 and 2025 was 21 January 1985, at -20.5 °C.
Does it snow in Carrboro?
Yes. Carrboro gets on average 17.7 cm of snow per year and has around 48 frost days.
Has the climate of Carrboro warmed?
Yes: Carrboro warmed by +1.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Carrboro?
The wettest day measured in Carrboro between 1940 and 2025 was 28 December 1958, with 123 mm of rain in 24 hours.
What was the windiest day in Carrboro?
The windiest day measured in Carrboro between 1940 and 2025 was 6 September 1996, with winds reaching 57.1 km/h.
What is the warmest month in Carrboro?
The warmest month in Carrboro is July (25.8 °C on average); the coldest is January (4.7 °C).
How much does it rain in Carrboro?
Carrboro receives on average 1,105 mm of precipitation per year, spread over about 122 rainy days.
Is it sunny in Carrboro?
Carrboro gets on average 9.1 hours of sunshine per day, roughly 3,322 hours per year over 1940-2025.
What is the biggest single-day snowfall in Carrboro?
The heaviest 24-hour snowfall measured in Carrboro between 1940 and 2025 was 1 March 1969, with 30.5 cm.
Are there tropical nights in Carrboro?
Yes: Carrboro has on average 76 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Carrboro?
In Carrboro, between 1940 and 2025, the highest apparent temperature reached 44.2 °C on 29 June 2012, and the lowest was -26.9 °C on 21 January 1985.
Compare Carrboro with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Carrboro