Clemmons climate — normals and trends
Clemmons (United States) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 14.9 °C and it receives 1,098 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 (25.3 °C on average) and the coldest is January (3.9 °C). Rainfall peaks in March.
Clemmons averages 60 frost days, 61 hot days (≥ 30 °C) and 121 rainy days per year.
Clemmons has warmed by +1.4 °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 67 to 53 per year over the period.
The hottest day of the period reached 40.4 °C (on 18 August 1988) and the coldest -20.3 °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
ClemmonsNorth Carolina
- coords
- 36.02°, -80.38°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
14.9°C
Average daily high
20.5°C
Average daily low
10.0°C
Annual rainfall
1,098mm
Sunshine / day
9.1h
Mean relative humidity
69%
Average peak wind
13.3km/h
Seasonal range
21.4°C
Frost days (< 0 °C)
60 d/yr
Hot days (≥ 30 °C)
61 d/yr
Rainy days (≥ 1 mm)
121 d/yr
Annual snowfall
21.5 cm
Average feels-like high
20.2 °C
Average feels-like low
8.6 °C
Average peak gust
32.3 km/h
Tropical nights (≥ 20 °C)
62 d/yr
Solar radiation
15.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.4 °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
40.4 °C
18 August 1988
Coldest day
-20.3 °C
21 January 1985
Wettest day
142 mm
16 September 2018
Windiest day
55.0 km/h
22 September 1989
Strongest gust
143.6 km/h
22 September 1989
Hottest feels-like
44.2 °C
21 August 1983
Coldest feels-like
-26.5 °C
21 January 1985
Snowiest day
31.2 cm
22 January 1987
Sunniest day
14.3 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 | 7.6 °C | -1.5 °C | 42 mm | -50 mm |
| Feb | 13.2 °C | +1.9 °C | 89 mm | +2 mm |
| Mar | 19.7 °C | +4.0 °C | 39 mm | -65 mm |
| Apr | 23.7 °C | +2.5 °C | 69 mm | -17 mm |
| May | 25.2 °C | -0.2 °C | 159 mm | +67 mm |
| Jun | 31.1 °C | +1.9 °C | 101 mm | +14 mm |
| Jul | 33.2 °C | +2.4 °C | 79 mm | -21 mm |
| Aug | 27.1 °C | -2.7 °C | 142 mm | +40 mm |
| Sep | 27.1 °C | +0.4 °C | 58 mm | -41 mm |
| Oct | 21.4 °C | +0.1 °C | 60 mm | -20 mm |
| Nov | 17.3 °C | +1.9 °C | 23 mm | -59 mm |
| Dec | 10.7 °C | +0.3 °C | 53 mm | -33 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 Clemmons?
Clemmons has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 14.9 °C and it receives 1,098 mm of precipitation per year.
What is the hottest day ever recorded in Clemmons?
The hottest day measured in Clemmons between 1940 and 2025 was 18 August 1988, reaching 40.4 °C.
What is the coldest day in Clemmons?
The coldest day measured in Clemmons between 1940 and 2025 was 21 January 1985, at -20.3 °C.
Does it snow in Clemmons?
Yes. Clemmons gets on average 21.5 cm of snow per year and has around 60 frost days.
Has the climate of Clemmons warmed?
Yes: Clemmons warmed by +1.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Clemmons?
The wettest day measured in Clemmons between 1940 and 2025 was 16 September 2018, with 142 mm of rain in 24 hours.
What was the windiest day in Clemmons?
The windiest day measured in Clemmons between 1940 and 2025 was 22 September 1989, with winds reaching 55.0 km/h.
What is the warmest month in Clemmons?
The warmest month in Clemmons is July (25.3 °C on average); the coldest is January (3.9 °C).
How much does it rain in Clemmons?
Clemmons receives on average 1,098 mm of precipitation per year, spread over about 121 rainy days.
Is it sunny in Clemmons?
Clemmons 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 Clemmons?
The heaviest 24-hour snowfall measured in Clemmons between 1940 and 2025 was 22 January 1987, with 31.2 cm.
Are there tropical nights in Clemmons?
Yes: Clemmons has on average 62 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Clemmons?
In Clemmons, between 1940 and 2025, the highest apparent temperature reached 44.2 °C on 21 August 1983, and the lowest was -26.5 °C on 21 January 1985.
Compare Clemmons with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Clemmons