Shinjō climate — normals and trends
Shinjō (Japan) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 10.3 °C and it receives 1,587 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 (23.3 °C on average) and the coldest is January (-1.5 °C). Rainfall peaks in July.
Shinjō averages 109 frost days, 10 hot days (≥ 30 °C) and 210 rainy days per year.
Shinjō has warmed by +2.7 °C between 1940 and 2025, or +0.32 °C per decade. This trend is statistically significant.
The number of frost days there went from about 131 to 87 per year over the period.
The hottest day of the period reached 36.2 °C (on 23 August 2018) and the coldest -16.8 °C (on 12 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
ShinjōYamagata
- coords
- 38.76°, 140.30°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
10.3°C
Average daily high
14.0°C
Average daily low
6.8°C
Annual rainfall
1,587mm
Sunshine / day
8.0h
Mean relative humidity
80%
Average peak wind
13.9km/h
Seasonal range
24.8°C
Frost days (< 0 °C)
109 d/yr
Hot days (≥ 30 °C)
10 d/yr
Rainy days (≥ 1 mm)
210 d/yr
Annual snowfall
257.4 cm
Average feels-like high
12.9 °C
Average feels-like low
5.1 °C
Average peak gust
41.0 km/h
Tropical nights (≥ 20 °C)
32 d/yr
Solar radiation
12.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.7 °C
since 1940
+0.3 °C per decade · r² = 0.67 · 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
36.2 °C
23 August 2018
Coldest day
-16.8 °C
12 February 1942
Wettest day
121 mm
8 July 1957
Windiest day
44.7 km/h
31 March 1979
Strongest gust
142.2 km/h
27 September 1959
Hottest feels-like
41.4 °C
23 August 2018
Coldest feels-like
-21.3 °C
12 February 1942
Snowiest day
28.7 cm
27 January 2002
Sunniest day
14.4 h
18 June 1987
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 | 2.1 °C | +1.0 °C | 138 mm | +4 mm |
| Feb | 1.9 °C | +0.1 °C | 108 mm | 0 mm |
| Mar | 7.4 °C | +2.0 °C | 96 mm | -21 mm |
| Apr | 13.7 °C | +1.2 °C | 148 mm | +45 mm |
| May | 19.3 °C | +0.8 °C | 159 mm | +55 mm |
| Jun | 25.8 °C | +3.8 °C | 106 mm | -23 mm |
| Jul | 31.0 °C | +5.6 °C | 55 mm | -140 mm |
| Aug | 29.6 °C | +2.4 °C | 295 mm | +141 mm |
| Sep | 25.4 °C | +2.6 °C | 165 mm | +15 mm |
| Oct | 17.6 °C | +0.8 °C | 162 mm | +40 mm |
| Nov | 11.4 °C | +1.0 °C | 131 mm | +8 mm |
| Dec | 5.5 °C | +1.5 °C | 173 mm | +24 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 Shinjō?
Shinjō has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 10.3 °C and it receives 1,587 mm of precipitation per year.
What is the hottest day ever recorded in Shinjō?
The hottest day measured in Shinjō between 1940 and 2025 was 23 August 2018, reaching 36.2 °C.
What is the coldest day in Shinjō?
The coldest day measured in Shinjō between 1940 and 2025 was 12 February 1942, at -16.8 °C.
Does it snow in Shinjō?
Yes. Shinjō gets on average 257.4 cm of snow per year and has around 109 frost days.
Has the climate of Shinjō warmed?
Yes: Shinjō warmed by +2.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Shinjō?
The wettest day measured in Shinjō between 1940 and 2025 was 8 July 1957, with 121 mm of rain in 24 hours.
What was the windiest day in Shinjō?
The windiest day measured in Shinjō between 1940 and 2025 was 31 March 1979, with winds reaching 44.7 km/h.
What is the warmest month in Shinjō?
The warmest month in Shinjō is August (23.3 °C on average); the coldest is January (-1.5 °C).
How much does it rain in Shinjō?
Shinjō receives on average 1,587 mm of precipitation per year, spread over about 210 rainy days.
Is it sunny in Shinjō?
Shinjō gets on average 8.0 hours of sunshine per day, roughly 2,920 hours per year over 1940-2025.
What is the biggest single-day snowfall in Shinjō?
The heaviest 24-hour snowfall measured in Shinjō between 1940 and 2025 was 27 January 2002, with 28.7 cm.
Are there tropical nights in Shinjō?
Yes: Shinjō has on average 32 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Shinjō?
In Shinjō, between 1940 and 2025, the highest apparent temperature reached 41.4 °C on 23 August 2018, and the lowest was -21.3 °C on 12 February 1942.
Compare Shinjō with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Shinjō