Urayasu climate — normals and trends
Urayasu (Japan) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 15.2 °C and it receives 1,409 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 (26.4 °C on average) and the coldest is January (4.6 °C). Rainfall peaks in October.
Urayasu averages 22 frost days, 27 hot days (≥ 30 °C) and 139 rainy days per year.
Urayasu has warmed by +2.0 °C between 1940 and 2025, or +0.24 °C per decade. This trend is statistically significant.
The number of frost days there went from about 38 to 6 per year over the period.
The hottest day of the period reached 37.4 °C (on 3 August 1994) and the coldest -10.1 °C (on 5 February 1952).
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
UrayasuChiba
- coords
- 35.66°, 139.90°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
15.2°C
Average daily high
18.6°C
Average daily low
12.2°C
Annual rainfall
1,409mm
Sunshine / day
8.1h
Mean relative humidity
75%
Average peak wind
20.9km/h
Seasonal range
21.8°C
Frost days (< 0 °C)
22 d/yr
Hot days (≥ 30 °C)
27 d/yr
Rainy days (≥ 1 mm)
139 d/yr
Annual snowfall
13.0 cm
Average feels-like high
18.0 °C
Average feels-like low
10.9 °C
Average peak gust
35.6 km/h
Tropical nights (≥ 20 °C)
84 d/yr
Solar radiation
13.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.0 °C
since 1940
+0.2 °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
37.4 °C
3 August 1994
Coldest day
-10.1 °C
5 February 1952
Wettest day
199 mm
26 September 1958
Windiest day
84.6 km/h
1 October 2018
Strongest gust
150.5 km/h
1 October 2018
Hottest feels-like
44.1 °C
10 August 2013
Coldest feels-like
-15.7 °C
5 February 1952
Snowiest day
35.6 cm
8 February 2014
Sunniest day
13.9 h
9 July 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 | 10.2 °C | +1.8 °C | 37 mm | -18 mm |
| Feb | 10.1 °C | +1.2 °C | 12 mm | -54 mm |
| Mar | 14.3 °C | +2.0 °C | 166 mm | +57 mm |
| Apr | 18.7 °C | +1.5 °C | 132 mm | +17 mm |
| May | 21.7 °C | +0.3 °C | 173 mm | +42 mm |
| Jun | 27.5 °C | +3.2 °C | 131 mm | -33 mm |
| Jul | 31.5 °C | +3.5 °C | 57 mm | -82 mm |
| Aug | 32.9 °C | +3.3 °C | 49 mm | -71 mm |
| Sep | 29.4 °C | +3.4 °C | 146 mm | -26 mm |
| Oct | 21.1 °C | +0.4 °C | 143 mm | -41 mm |
| Nov | 16.2 °C | +0.4 °C | 43 mm | -54 mm |
| Dec | 11.9 °C | +1.0 °C | 71 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 Urayasu?
Urayasu has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 15.2 °C and it receives 1,409 mm of precipitation per year.
What is the hottest day ever recorded in Urayasu?
The hottest day measured in Urayasu between 1940 and 2025 was 3 August 1994, reaching 37.4 °C.
What is the coldest day in Urayasu?
The coldest day measured in Urayasu between 1940 and 2025 was 5 February 1952, at -10.1 °C.
Does it snow in Urayasu?
Yes. Urayasu gets on average 13.0 cm of snow per year and has around 22 frost days.
Has the climate of Urayasu warmed?
Yes: Urayasu warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Urayasu?
The wettest day measured in Urayasu between 1940 and 2025 was 26 September 1958, with 199 mm of rain in 24 hours.
What was the windiest day in Urayasu?
The windiest day measured in Urayasu between 1940 and 2025 was 1 October 2018, with winds reaching 84.6 km/h.
What is the warmest month in Urayasu?
The warmest month in Urayasu is August (26.4 °C on average); the coldest is January (4.6 °C).
How much does it rain in Urayasu?
Urayasu receives on average 1,409 mm of precipitation per year, spread over about 139 rainy days.
Is it sunny in Urayasu?
Urayasu gets on average 8.1 hours of sunshine per day, roughly 2,957 hours per year over 1940-2025.
What is the biggest single-day snowfall in Urayasu?
The heaviest 24-hour snowfall measured in Urayasu between 1940 and 2025 was 8 February 2014, with 35.6 cm.
Are there tropical nights in Urayasu?
Yes: Urayasu has on average 84 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Urayasu?
In Urayasu, between 1940 and 2025, the highest apparent temperature reached 44.1 °C on 10 August 2013, and the lowest was -15.7 °C on 5 February 1952.
Compare Urayasu with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Urayasu