Cornelius climate — normals and trends
Cornelius (United States) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 15.6 °C and it receives 1,072 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 (25.9 °C on average) and the coldest is January (4.7 °C). Rainfall peaks in March.
Cornelius averages 52 frost days, 68 hot days (≥ 30 °C) and 119 rainy days per year.
Cornelius has warmed by +1.5 °C between 1940 and 2025, or +0.17 °C per decade. This trend is statistically significant.
The number of frost days there went from about 58 to 46 per year over the period.
The hottest day of the period reached 41.2 °C (on 9 July 1977) and the coldest -19.7 °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
CorneliusNorth Carolina
- coords
- 35.49°, -80.86°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
15.6°C
Average daily high
21.1°C
Average daily low
10.8°C
Annual rainfall
1,072mm
Sunshine / day
9.1h
Mean relative humidity
70%
Average peak wind
14.0km/h
Seasonal range
21.2°C
Frost days (< 0 °C)
52 d/yr
Hot days (≥ 30 °C)
68 d/yr
Rainy days (≥ 1 mm)
119 d/yr
Annual snowfall
16.3 cm
Average feels-like high
20.9 °C
Average feels-like low
9.5 °C
Average peak gust
33.0 km/h
Tropical nights (≥ 20 °C)
74 d/yr
Solar radiation
15.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.5 °C
since 1940
+0.2 °C per decade · r² = 0.36 · 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
41.2 °C
9 July 1977
Coldest day
-19.7 °C
21 January 1985
Wettest day
135 mm
16 September 2018
Windiest day
60.8 km/h
22 September 1989
Strongest gust
150.5 km/h
22 September 1989
Hottest feels-like
45.5 °C
21 August 1983
Coldest feels-like
-25.7 °C
21 January 1985
Snowiest day
32.3 cm
22 January 1987
Sunniest day
14.2 h
24 June 2024
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 | 8.2 °C | -1.6 °C | 37 mm | -56 mm |
| Feb | 14.2 °C | +2.3 °C | 70 mm | -20 mm |
| Mar | 20.6 °C | +4.3 °C | 40 mm | -65 mm |
| Apr | 24.4 °C | +2.7 °C | 81 mm | -2 mm |
| May | 25.9 °C | -0.2 °C | 137 mm | +54 mm |
| Jun | 31.6 °C | +1.8 °C | 86 mm | +2 mm |
| Jul | 33.7 °C | +2.4 °C | 67 mm | -29 mm |
| Aug | 27.3 °C | -3.0 °C | 221 mm | +120 mm |
| Sep | 27.2 °C | +0.1 °C | 55 mm | -39 mm |
| Oct | 21.4 °C | -0.4 °C | 51 mm | -25 mm |
| Nov | 18.1 °C | +2.0 °C | 26 mm | -54 mm |
| Dec | 11.7 °C | +0.5 °C | 55 mm | -32 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 Cornelius?
Cornelius has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 15.6 °C and it receives 1,072 mm of precipitation per year.
What is the hottest day ever recorded in Cornelius?
The hottest day measured in Cornelius between 1940 and 2025 was 9 July 1977, reaching 41.2 °C.
What is the coldest day in Cornelius?
The coldest day measured in Cornelius between 1940 and 2025 was 21 January 1985, at -19.7 °C.
Does it snow in Cornelius?
Yes. Cornelius gets on average 16.3 cm of snow per year and has around 52 frost days.
Has the climate of Cornelius warmed?
Yes: Cornelius warmed by +1.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Cornelius?
The wettest day measured in Cornelius between 1940 and 2025 was 16 September 2018, with 135 mm of rain in 24 hours.
What was the windiest day in Cornelius?
The windiest day measured in Cornelius between 1940 and 2025 was 22 September 1989, with winds reaching 60.8 km/h.
What is the warmest month in Cornelius?
The warmest month in Cornelius is July (25.9 °C on average); the coldest is January (4.7 °C).
How much does it rain in Cornelius?
Cornelius receives on average 1,072 mm of precipitation per year, spread over about 119 rainy days.
Is it sunny in Cornelius?
Cornelius 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 Cornelius?
The heaviest 24-hour snowfall measured in Cornelius between 1940 and 2025 was 22 January 1987, with 32.3 cm.
Are there tropical nights in Cornelius?
Yes: Cornelius has on average 74 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Cornelius?
In Cornelius, between 1940 and 2025, the highest apparent temperature reached 45.5 °C on 21 August 1983, and the lowest was -25.7 °C on 21 January 1985.
Compare Cornelius with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Cornelius