Sandachō climate — normals and trends
Sandachō (Japan) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 14.3 °C and it receives 1,557 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 (26.2 °C on average) and the coldest is January (3.1 °C). Rainfall peaks in July.
Sandachō averages 54 frost days, 35 hot days (≥ 30 °C) and 136 rainy days per year.
Sandachō has warmed by +2.8 °C between 1940 and 2025, or +0.33 °C per decade. This trend is statistically significant.
The number of frost days there went from about 81 to 27 per year over the period.
The hottest day of the period reached 38.8 °C (on 8 August 1994) and the coldest -11.6 °C (on 21 February 1968).
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
SandachōHyōgo
- coords
- 34.88°, 135.23°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
14.3°C
Average daily high
18.4°C
Average daily low
10.4°C
Annual rainfall
1,557mm
Sunshine / day
8.8h
Mean relative humidity
74%
Average peak wind
15.5km/h
Seasonal range
23.1°C
Frost days (< 0 °C)
54 d/yr
Hot days (≥ 30 °C)
35 d/yr
Rainy days (≥ 1 mm)
136 d/yr
Annual snowfall
14.2 cm
Average feels-like high
17.8 °C
Average feels-like low
9.4 °C
Average peak gust
38.7 km/h
Tropical nights (≥ 20 °C)
73 d/yr
Solar radiation
14.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.8 °C
since 1940
+0.3 °C per decade · r² = 0.70 · 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
38.8 °C
8 August 1994
Coldest day
-11.6 °C
21 February 1968
Wettest day
172 mm
16 September 1972
Windiest day
56.5 km/h
27 September 1991
Strongest gust
153.4 km/h
26 September 1959
Hottest feels-like
43.5 °C
8 August 1994
Coldest feels-like
-16.3 °C
21 February 1968
Snowiest day
28.3 cm
15 February 1968
Sunniest day
14.0 h
13 June 1940
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 | 8.0 °C | +1.1 °C | 22 mm | -27 mm |
| Feb | 6.8 °C | -0.9 °C | 29 mm | -35 mm |
| Mar | 12.7 °C | +1.1 °C | 122 mm | +20 mm |
| Apr | 18.7 °C | +1.3 °C | 63 mm | -66 mm |
| May | 22.3 °C | +0.5 °C | 167 mm | +18 mm |
| Jun | 27.6 °C | +2.5 °C | 184 mm | -28 mm |
| Jul | 32.7 °C | +3.9 °C | 74 mm | -159 mm |
| Aug | 32.4 °C | +2.1 °C | 171 mm | +19 mm |
| Sep | 29.2 °C | +2.9 °C | 180 mm | -25 mm |
| Oct | 22.2 °C | +1.6 °C | 215 mm | +81 mm |
| Nov | 15.6 °C | +0.5 °C | 34 mm | -44 mm |
| Dec | 11.1 °C | +1.5 °C | 43 mm | -7 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 Sandachō?
Sandachō has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 14.3 °C and it receives 1,557 mm of precipitation per year.
What is the hottest day ever recorded in Sandachō?
The hottest day measured in Sandachō between 1940 and 2025 was 8 August 1994, reaching 38.8 °C.
What is the coldest day in Sandachō?
The coldest day measured in Sandachō between 1940 and 2025 was 21 February 1968, at -11.6 °C.
Does it snow in Sandachō?
Yes. Sandachō gets on average 14.2 cm of snow per year and has around 54 frost days.
Has the climate of Sandachō warmed?
Yes: Sandachō warmed by +2.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Sandachō?
The wettest day measured in Sandachō between 1940 and 2025 was 16 September 1972, with 172 mm of rain in 24 hours.
What was the windiest day in Sandachō?
The windiest day measured in Sandachō between 1940 and 2025 was 27 September 1991, with winds reaching 56.5 km/h.
What is the warmest month in Sandachō?
The warmest month in Sandachō is August (26.2 °C on average); the coldest is January (3.1 °C).
How much does it rain in Sandachō?
Sandachō receives on average 1,557 mm of precipitation per year, spread over about 136 rainy days.
Is it sunny in Sandachō?
Sandachō gets on average 8.8 hours of sunshine per day, roughly 3,212 hours per year over 1940-2025.
What is the biggest single-day snowfall in Sandachō?
The heaviest 24-hour snowfall measured in Sandachō between 1940 and 2025 was 15 February 1968, with 28.3 cm.
Are there tropical nights in Sandachō?
Yes: Sandachō has on average 73 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Sandachō?
In Sandachō, between 1940 and 2025, the highest apparent temperature reached 43.5 °C on 8 August 1994, and the lowest was -16.3 °C on 21 February 1968.
Compare Sandachō with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Sandachō