Narutō climate — normals and trends
Narutō (Japan) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 16.2 °C and it receives 1,526 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 (26.0 °C on average) and the coldest is January (6.9 °C). Rainfall peaks in October.
Narutō averages 1 frost days, 5 hot days (≥ 30 °C) and 146 rainy days per year.
Narutō has warmed by +1.5 °C between 1940 and 2025, or +0.18 °C per decade. This trend is statistically significant.
The number of frost days there went from about 2 to 0 per year over the period.
The hottest day of the period reached 33.1 °C (on 9 August 2016) and the coldest -2.7 °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
NarutōChiba
- coords
- 35.60°, 140.42°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
16.2°C
Average daily high
18.2°C
Average daily low
14.2°C
Annual rainfall
1,526mm
Sunshine / day
8.4h
Mean relative humidity
75%
Average peak wind
23.8km/h
Seasonal range
19.1°C
Frost days (< 0 °C)
1 d/yr
Hot days (≥ 30 °C)
5 d/yr
Rainy days (≥ 1 mm)
146 d/yr
Annual snowfall
3.3 cm
Average feels-like high
17.8 °C
Average feels-like low
12.5 °C
Average peak gust
40.2 km/h
Tropical nights (≥ 20 °C)
100 d/yr
Solar radiation
14.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.5 °C
since 1940
+0.2 °C per decade · r² = 0.50 · 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
33.1 °C
9 August 2016
Coldest day
-2.7 °C
5 February 1952
Wettest day
184 mm
27 October 2007
Windiest day
81.0 km/h
23 October 2017
Strongest gust
153.0 km/h
19 October 1979
Hottest feels-like
41.0 °C
6 August 2025
Coldest feels-like
-9.7 °C
25 January 2023
Snowiest day
13.3 cm
15 February 1951
Sunniest day
14.0 h
21 June 1958
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 | 10.6 °C | +1.3 °C | 57 mm | -20 mm |
| Feb | 9.8 °C | +0.4 °C | 20 mm | -68 mm |
| Mar | 13.9 °C | +1.7 °C | 160 mm | +30 mm |
| Apr | 17.4 °C | +1.0 °C | 155 mm | +35 mm |
| May | 20.4 °C | +0.3 °C | 193 mm | +58 mm |
| Jun | 25.3 °C | +2.4 °C | 103 mm | -63 mm |
| Jul | 28.6 °C | +2.4 °C | 75 mm | -49 mm |
| Aug | 29.9 °C | +2.0 °C | 81 mm | -21 mm |
| Sep | 28.0 °C | +2.7 °C | 102 mm | -67 mm |
| Oct | 21.8 °C | +1.0 °C | 191 mm | -21 mm |
| Nov | 16.6 °C | +0.1 °C | 75 mm | -49 mm |
| Dec | 13.1 °C | +1.2 °C | 99 mm | +19 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 Narutō?
Narutō has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 16.2 °C and it receives 1,526 mm of precipitation per year.
What is the hottest day ever recorded in Narutō?
The hottest day measured in Narutō between 1940 and 2025 was 9 August 2016, reaching 33.1 °C.
What is the coldest day in Narutō?
The coldest day measured in Narutō between 1940 and 2025 was 5 February 1952, at -2.7 °C.
Does it snow in Narutō?
Yes. Narutō gets on average 3.3 cm of snow per year and has around 1 frost days.
Has the climate of Narutō warmed?
Yes: Narutō warmed by +1.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Narutō?
The wettest day measured in Narutō between 1940 and 2025 was 27 October 2007, with 184 mm of rain in 24 hours.
What was the windiest day in Narutō?
The windiest day measured in Narutō between 1940 and 2025 was 23 October 2017, with winds reaching 81.0 km/h.
What is the warmest month in Narutō?
The warmest month in Narutō is August (26.0 °C on average); the coldest is January (6.9 °C).
How much does it rain in Narutō?
Narutō receives on average 1,526 mm of precipitation per year, spread over about 146 rainy days.
Is it sunny in Narutō?
Narutō gets on average 8.4 hours of sunshine per day, roughly 3,066 hours per year over 1940-2025.
What is the biggest single-day snowfall in Narutō?
The heaviest 24-hour snowfall measured in Narutō between 1940 and 2025 was 15 February 1951, with 13.3 cm.
Are there tropical nights in Narutō?
Yes: Narutō has on average 100 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Narutō?
In Narutō, between 1940 and 2025, the highest apparent temperature reached 41.0 °C on 6 August 2025, and the lowest was -9.7 °C on 25 January 2023.
Compare Narutō with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Narutō