Johnson City climate — normals and trends
Johnson City (United States) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 11.9 °C and it receives 1,228 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 (21.7 °C on average) and the coldest is January (1.2 °C). Rainfall peaks in March.
Johnson City averages 85 frost days, 5 hot days (≥ 30 °C) and 160 rainy days per year.
Johnson City 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 96 to 74 per year over the period.
The hottest day of the period reached 34.7 °C (on 28 July 1952) and the coldest -29.9 °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
Johnson CityTennessee
- coords
- 36.31°, -82.35°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
11.9°C
Average daily high
17.2°C
Average daily low
7.3°C
Annual rainfall
1,228mm
Sunshine / day
9.2h
Mean relative humidity
73%
Average peak wind
12.6km/h
Seasonal range
20.5°C
Frost days (< 0 °C)
85 d/yr
Hot days (≥ 30 °C)
5 d/yr
Rainy days (≥ 1 mm)
160 d/yr
Annual snowfall
61.3 cm
Average feels-like high
16.3 °C
Average feels-like low
5.5 °C
Average peak gust
36.5 km/h
Tropical nights (≥ 20 °C)
5 d/yr
Solar radiation
15.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.4 °C
since 1940
+0.2 °C per decade · r² = 0.32 · 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
34.7 °C
28 July 1952
Coldest day
-29.9 °C
21 January 1985
Wettest day
137 mm
26 September 2024
Windiest day
39.6 km/h
25 February 1961
Strongest gust
126.7 km/h
27 September 2024
Hottest feels-like
38.2 °C
21 August 1983
Coldest feels-like
-35.7 °C
21 January 1985
Snowiest day
42.4 cm
13 March 1993
Sunniest day
14.5 h
23 June 2003
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 | 3.3 °C | -2.7 °C | 71 mm | -40 mm |
| Feb | 10.4 °C | +2.2 °C | 127 mm | +21 mm |
| Mar | 16.2 °C | +3.6 °C | 67 mm | -53 mm |
| Apr | 20.2 °C | +2.4 °C | 123 mm | +14 mm |
| May | 20.7 °C | -0.9 °C | 188 mm | +78 mm |
| Jun | 26.9 °C | +1.7 °C | 116 mm | +14 mm |
| Jul | 28.8 °C | +2.3 °C | 99 mm | -15 mm |
| Aug | 25.5 °C | -0.7 °C | 105 mm | +4 mm |
| Sep | 24.0 °C | +0.5 °C | 95 mm | +4 mm |
| Oct | 18.3 °C | 0.0 °C | 85 mm | +8 mm |
| Nov | 13.2 °C | +0.8 °C | 69 mm | -18 mm |
| Dec | 8.5 °C | +0.7 °C | 81 mm | -19 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 Johnson City?
Johnson City has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 11.9 °C and it receives 1,228 mm of precipitation per year.
What is the hottest day ever recorded in Johnson City?
The hottest day measured in Johnson City between 1940 and 2025 was 28 July 1952, reaching 34.7 °C.
What is the coldest day in Johnson City?
The coldest day measured in Johnson City between 1940 and 2025 was 21 January 1985, at -29.9 °C.
Does it snow in Johnson City?
Yes. Johnson City gets on average 61.3 cm of snow per year and has around 85 frost days.
Has the climate of Johnson City warmed?
Yes: Johnson City warmed by +1.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Johnson City?
The wettest day measured in Johnson City between 1940 and 2025 was 26 September 2024, with 137 mm of rain in 24 hours.
What was the windiest day in Johnson City?
The windiest day measured in Johnson City between 1940 and 2025 was 25 February 1961, with winds reaching 39.6 km/h.
What is the warmest month in Johnson City?
The warmest month in Johnson City is July (21.7 °C on average); the coldest is January (1.2 °C).
How much does it rain in Johnson City?
Johnson City receives on average 1,228 mm of precipitation per year, spread over about 160 rainy days.
Is it sunny in Johnson City?
Johnson City 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 Johnson City?
The heaviest 24-hour snowfall measured in Johnson City between 1940 and 2025 was 13 March 1993, with 42.4 cm.
Are there tropical nights in Johnson City?
Yes: Johnson City has on average 5 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Johnson City?
In Johnson City, between 1940 and 2025, the highest apparent temperature reached 38.2 °C on 21 August 1983, and the lowest was -35.7 °C on 21 January 1985.
Compare Johnson City with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Johnson City