Ōkubo-naka climate — normals and trends
Ōkubo-naka (Japan) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 16.2 °C and it receives 1,473 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 (28.1 °C on average) and the coldest is January (5.4 °C). Rainfall peaks in June.
Ōkubo-naka averages 14 frost days, 49 hot days (≥ 30 °C) and 131 rainy days per year.
Ōkubo-naka has warmed by +2.6 °C between 1940 and 2025, or +0.31 °C per decade. This trend is statistically significant.
The number of frost days there went from about 29 to 0 per year over the period.
The hottest day of the period reached 38.4 °C (on 1 August 2001) and the coldest -7.2 °C (on 27 February 1945).
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
Ōkubo-nakaOsaka
- coords
- 34.40°, 135.34°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
16.2°C
Average daily high
19.9°C
Average daily low
12.6°C
Annual rainfall
1,473mm
Sunshine / day
9.0h
Mean relative humidity
72%
Average peak wind
15.4km/h
Seasonal range
22.7°C
Frost days (< 0 °C)
14 d/yr
Hot days (≥ 30 °C)
49 d/yr
Rainy days (≥ 1 mm)
131 d/yr
Annual snowfall
5.7 cm
Average feels-like high
19.8 °C
Average feels-like low
11.9 °C
Average peak gust
35.9 km/h
Tropical nights (≥ 20 °C)
95 d/yr
Solar radiation
14.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.6 °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
38.4 °C
1 August 2001
Coldest day
-7.2 °C
27 February 1945
Wettest day
168 mm
16 September 1972
Windiest day
69.9 km/h
25 September 1964
Strongest gust
163.8 km/h
26 September 1959
Hottest feels-like
43.9 °C
8 August 1994
Coldest feels-like
-11.1 °C
27 February 1945
Snowiest day
22.8 cm
15 February 1968
Sunniest day
14.0 h
3 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 | 9.3 °C | +0.6 °C | 33 mm | -23 mm |
| Feb | 8.2 °C | -1.1 °C | 34 mm | -32 mm |
| Mar | 14.0 °C | +1.1 °C | 76 mm | -22 mm |
| Apr | 19.9 °C | +1.4 °C | 58 mm | -62 mm |
| May | 23.4 °C | +0.4 °C | 231 mm | +87 mm |
| Jun | 27.9 °C | +1.8 °C | 190 mm | -23 mm |
| Jul | 33.5 °C | +3.6 °C | 58 mm | -130 mm |
| Aug | 33.5 °C | +1.7 °C | 225 mm | +103 mm |
| Sep | 30.7 °C | +2.8 °C | 152 mm | -34 mm |
| Oct | 23.6 °C | +1.5 °C | 232 mm | +94 mm |
| Nov | 17.0 °C | +0.3 °C | 36 mm | -50 mm |
| Dec | 13.0 °C | +1.6 °C | 43 mm | -16 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 Ōkubo-naka?
Ōkubo-naka has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 16.2 °C and it receives 1,473 mm of precipitation per year.
What is the hottest day ever recorded in Ōkubo-naka?
The hottest day measured in Ōkubo-naka between 1940 and 2025 was 1 August 2001, reaching 38.4 °C.
What is the coldest day in Ōkubo-naka?
The coldest day measured in Ōkubo-naka between 1940 and 2025 was 27 February 1945, at -7.2 °C.
Does it snow in Ōkubo-naka?
Yes. Ōkubo-naka gets on average 5.7 cm of snow per year and has around 14 frost days.
Has the climate of Ōkubo-naka warmed?
Yes: Ōkubo-naka warmed by +2.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Ōkubo-naka?
The wettest day measured in Ōkubo-naka between 1940 and 2025 was 16 September 1972, with 168 mm of rain in 24 hours.
What was the windiest day in Ōkubo-naka?
The windiest day measured in Ōkubo-naka between 1940 and 2025 was 25 September 1964, with winds reaching 69.9 km/h.
What is the warmest month in Ōkubo-naka?
The warmest month in Ōkubo-naka is August (28.1 °C on average); the coldest is January (5.4 °C).
How much does it rain in Ōkubo-naka?
Ōkubo-naka receives on average 1,473 mm of precipitation per year, spread over about 131 rainy days.
Is it sunny in Ōkubo-naka?
Ōkubo-naka gets on average 9.0 hours of sunshine per day, roughly 3,285 hours per year over 1940-2025.
What is the biggest single-day snowfall in Ōkubo-naka?
The heaviest 24-hour snowfall measured in Ōkubo-naka between 1940 and 2025 was 15 February 1968, with 22.8 cm.
Are there tropical nights in Ōkubo-naka?
Yes: Ōkubo-naka has on average 95 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Ōkubo-naka?
In Ōkubo-naka, between 1940 and 2025, the highest apparent temperature reached 43.9 °C on 8 August 1994, and the lowest was -11.1 °C on 27 February 1945.
Compare Ōkubo-naka with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Ōkubo-naka