Sado climate — normals and trends
Sado (Japan) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 13.7 °C and it receives 1,585 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 August (26.1 °C on average) and the coldest is January (3.2 °C). Rainfall peaks in July.
Sado averages 21 frost days, 14 hot days (≥ 30 °C) and 187 rainy days per year.
Sado has warmed by +2.2 °C between 1940 and 2025, or +0.25 °C per decade. This trend is statistically significant.
The number of frost days there went from about 40 to 2 per year over the period.
The hottest day of the period reached 37.5 °C (on 15 August 2019) and the coldest -8.7 °C (on 9 February 1942).
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
SadoNiigata
- coords
- 38.02°, 138.36°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
13.7°C
Average daily high
16.1°C
Average daily low
11.5°C
Annual rainfall
1,585mm
Sunshine / day
8.7h
Mean relative humidity
73%
Average peak wind
21.3km/h
Seasonal range
22.9°C
Frost days (< 0 °C)
21 d/yr
Hot days (≥ 30 °C)
14 d/yr
Rainy days (≥ 1 mm)
187 d/yr
Annual snowfall
82.1 cm
Average feels-like high
15.1 °C
Average feels-like low
9.3 °C
Average peak gust
48.2 km/h
Tropical nights (≥ 20 °C)
75 d/yr
Solar radiation
14.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.2 °C
since 1940
+0.3 °C per decade · r² = 0.61 · 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
37.5 °C
15 August 2019
Coldest day
-8.7 °C
9 February 1942
Wettest day
154 mm
25 July 1958
Windiest day
87.5 km/h
28 September 1991
Strongest gust
194.8 km/h
28 September 1991
Hottest feels-like
42.2 °C
9 August 2023
Coldest feels-like
-14.3 °C
19 January 1966
Snowiest day
20.7 cm
12 March 1969
Sunniest day
14.0 h
18 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 | 6.1 °C | +1.1 °C | 166 mm | +36 mm |
| Feb | 5.2 °C | 0.0 °C | 106 mm | +8 mm |
| Mar | 9.7 °C | +1.5 °C | 78 mm | -22 mm |
| Apr | 13.9 °C | +0.4 °C | 87 mm | -8 mm |
| May | 18.7 °C | +0.3 °C | 126 mm | +31 mm |
| Jun | 24.0 °C | +1.5 °C | 117 mm | -12 mm |
| Jul | 30.8 °C | +4.4 °C | 21 mm | -184 mm |
| Aug | 30.1 °C | +1.4 °C | 295 mm | +143 mm |
| Sep | 27.3 °C | +2.7 °C | 253 mm | +84 mm |
| Oct | 19.9 °C | +1.0 °C | 173 mm | +51 mm |
| Nov | 14.0 °C | +0.6 °C | 130 mm | -1 mm |
| Dec | 9.6 °C | +1.5 °C | 174 mm | +14 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 Sado?
Sado has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 13.7 °C and it receives 1,585 mm of precipitation per year.
What is the hottest day ever recorded in Sado?
The hottest day measured in Sado between 1940 and 2025 was 15 August 2019, reaching 37.5 °C.
What is the coldest day in Sado?
The coldest day measured in Sado between 1940 and 2025 was 9 February 1942, at -8.7 °C.
Does it snow in Sado?
Yes. Sado gets on average 82.1 cm of snow per year and has around 21 frost days.
Has the climate of Sado warmed?
Yes: Sado warmed by +2.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Sado?
The wettest day measured in Sado between 1940 and 2025 was 25 July 1958, with 154 mm of rain in 24 hours.
What was the windiest day in Sado?
The windiest day measured in Sado between 1940 and 2025 was 28 September 1991, with winds reaching 87.5 km/h.
What is the warmest month in Sado?
The warmest month in Sado is August (26.1 °C on average); the coldest is January (3.2 °C).
How much does it rain in Sado?
Sado receives on average 1,585 mm of precipitation per year, spread over about 187 rainy days.
Is it sunny in Sado?
Sado gets on average 8.7 hours of sunshine per day, roughly 3,175 hours per year over 1940-2025.
What is the biggest single-day snowfall in Sado?
The heaviest 24-hour snowfall measured in Sado between 1940 and 2025 was 12 March 1969, with 20.7 cm.
Are there tropical nights in Sado?
Yes: Sado has on average 75 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Sado?
In Sado, between 1940 and 2025, the highest apparent temperature reached 42.2 °C on 9 August 2023, and the lowest was -14.3 °C on 19 January 1966.
Compare Sado with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Sado