Gastonia climate — normals and trends
Gastonia (United States) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 15.6 °C and it receives 1,160 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 (25.7 °C on average) and the coldest is January (4.9 °C). Rainfall peaks in July.
Gastonia averages 50 frost days, 64 hot days (≥ 30 °C) and 124 rainy days per year.
Gastonia has warmed by +1.3 °C between 1940 and 2025, or +0.15 °C per decade. This trend is statistically significant.
The number of frost days there went from about 56 to 44 per year over the period.
The hottest day of the period reached 40.5 °C (on 29 June 2012) and the coldest -20.6 °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
GastoniaNorth Carolina
- coords
- 35.26°, -81.19°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
15.6°C
Average daily high
21.2°C
Average daily low
10.8°C
Annual rainfall
1,160mm
Sunshine / day
9.2h
Mean relative humidity
70%
Average peak wind
13.7km/h
Seasonal range
20.8°C
Frost days (< 0 °C)
50 d/yr
Hot days (≥ 30 °C)
64 d/yr
Rainy days (≥ 1 mm)
124 d/yr
Annual snowfall
14.6 cm
Average feels-like high
21.1 °C
Average feels-like low
9.6 °C
Average peak gust
32.7 km/h
Tropical nights (≥ 20 °C)
74 d/yr
Solar radiation
16.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.3 °C
since 1940
+0.2 °C per decade · r² = 0.31 · 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
40.5 °C
29 June 2012
Coldest day
-20.6 °C
21 January 1985
Wettest day
118 mm
17 September 2020
Windiest day
61.4 km/h
22 September 1989
Strongest gust
154.4 km/h
22 September 1989
Hottest feels-like
44.4 °C
21 August 1983
Coldest feels-like
-26.6 °C
21 January 1985
Snowiest day
31.3 cm
22 January 1987
Sunniest day
14.3 h
26 June 2012
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 | 8.4 °C | -1.7 °C | 39 mm | -59 mm |
| Feb | 14.6 °C | +2.3 °C | 69 mm | -25 mm |
| Mar | 20.1 °C | +3.6 °C | 48 mm | -64 mm |
| Apr | 23.8 °C | +2.0 °C | 91 mm | -1 mm |
| May | 25.0 °C | -1.0 °C | 153 mm | +65 mm |
| Jun | 31.0 °C | +1.4 °C | 107 mm | +12 mm |
| Jul | 33.7 °C | +2.7 °C | 93 mm | -20 mm |
| Aug | 27.2 °C | -2.9 °C | 249 mm | +138 mm |
| Sep | 27.2 °C | +0.2 °C | 46 mm | -51 mm |
| Oct | 21.4 °C | -0.4 °C | 72 mm | -9 mm |
| Nov | 18.1 °C | +1.9 °C | 18 mm | -67 mm |
| Dec | 12.1 °C | +0.7 °C | 55 mm | -38 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 Gastonia?
Gastonia has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 15.6 °C and it receives 1,160 mm of precipitation per year.
What is the hottest day ever recorded in Gastonia?
The hottest day measured in Gastonia between 1940 and 2025 was 29 June 2012, reaching 40.5 °C.
What is the coldest day in Gastonia?
The coldest day measured in Gastonia between 1940 and 2025 was 21 January 1985, at -20.6 °C.
Does it snow in Gastonia?
Yes. Gastonia gets on average 14.6 cm of snow per year and has around 50 frost days.
Has the climate of Gastonia warmed?
Yes: Gastonia warmed by +1.3 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Gastonia?
The wettest day measured in Gastonia between 1940 and 2025 was 17 September 2020, with 118 mm of rain in 24 hours.
What was the windiest day in Gastonia?
The windiest day measured in Gastonia between 1940 and 2025 was 22 September 1989, with winds reaching 61.4 km/h.
What is the warmest month in Gastonia?
The warmest month in Gastonia is July (25.7 °C on average); the coldest is January (4.9 °C).
How much does it rain in Gastonia?
Gastonia receives on average 1,160 mm of precipitation per year, spread over about 124 rainy days.
Is it sunny in Gastonia?
Gastonia gets on average 9.2 hours of sunshine per day, roughly 3,358 hours per year over 1940-2025.
What is the biggest single-day snowfall in Gastonia?
The heaviest 24-hour snowfall measured in Gastonia between 1940 and 2025 was 22 January 1987, with 31.3 cm.
Are there tropical nights in Gastonia?
Yes: Gastonia has on average 74 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Gastonia?
In Gastonia, between 1940 and 2025, the highest apparent temperature reached 44.4 °C on 21 August 1983, and the lowest was -26.6 °C on 21 January 1985.
Compare Gastonia with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Gastonia