Tome climate — normals and trends
Tome (Japan) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 11.8 °C and it receives 1,116 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 (24.3 °C on average) and the coldest is January (0.3 °C). Rainfall peaks in September.
Tome averages 88 frost days, 16 hot days (≥ 30 °C) and 129 rainy days per year.
Tome 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 113 to 63 per year over the period.
The hottest day of the period reached 36.8 °C (on 15 August 1994) and the coldest -20.1 °C (on 8 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
TomeMiyagi
- coords
- 38.71°, 141.16°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
11.8°C
Average daily high
15.9°C
Average daily low
8.0°C
Annual rainfall
1,116mm
Sunshine / day
8.4h
Mean relative humidity
74%
Average peak wind
16.6km/h
Seasonal range
24.0°C
Frost days (< 0 °C)
88 d/yr
Hot days (≥ 30 °C)
16 d/yr
Rainy days (≥ 1 mm)
129 d/yr
Annual snowfall
46.3 cm
Average feels-like high
14.5 °C
Average feels-like low
6.4 °C
Average peak gust
39.8 km/h
Tropical nights (≥ 20 °C)
44 d/yr
Solar radiation
13.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.8 °C
since 1940
+0.3 °C per decade · r² = 0.64 · 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
36.8 °C
15 August 1994
Coldest day
-20.1 °C
8 February 1942
Wettest day
149 mm
30 August 1998
Windiest day
50.4 km/h
16 September 1961
Strongest gust
130.7 km/h
23 August 1981
Hottest feels-like
43.2 °C
4 August 2021
Coldest feels-like
-25.0 °C
8 February 1942
Snowiest day
34.0 cm
18 January 2016
Sunniest day
14.6 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 | 5.9 °C | +1.8 °C | 33 mm | -11 mm |
| Feb | 5.7 °C | +0.8 °C | 20 mm | -28 mm |
| Mar | 11.1 °C | +2.3 °C | 70 mm | -9 mm |
| Apr | 15.9 °C | +1.1 °C | 94 mm | +5 mm |
| May | 20.0 °C | +0.5 °C | 151 mm | +56 mm |
| Jun | 27.1 °C | +4.6 °C | 71 mm | -40 mm |
| Jul | 31.4 °C | +5.3 °C | 77 mm | -70 mm |
| Aug | 31.1 °C | +3.2 °C | 188 mm | +58 mm |
| Sep | 26.8 °C | +2.7 °C | 128 mm | -21 mm |
| Oct | 19.2 °C | +0.7 °C | 117 mm | +7 mm |
| Nov | 13.6 °C | +1.0 °C | 58 mm | -4 mm |
| Dec | 8.2 °C | +1.4 °C | 60 mm | +10 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 Tome?
Tome has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 11.8 °C and it receives 1,116 mm of precipitation per year.
What is the hottest day ever recorded in Tome?
The hottest day measured in Tome between 1940 and 2025 was 15 August 1994, reaching 36.8 °C.
What is the coldest day in Tome?
The coldest day measured in Tome between 1940 and 2025 was 8 February 1942, at -20.1 °C.
Does it snow in Tome?
Yes. Tome gets on average 46.3 cm of snow per year and has around 88 frost days.
Has the climate of Tome warmed?
Yes: Tome warmed by +2.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Tome?
The wettest day measured in Tome between 1940 and 2025 was 30 August 1998, with 149 mm of rain in 24 hours.
What was the windiest day in Tome?
The windiest day measured in Tome between 1940 and 2025 was 16 September 1961, with winds reaching 50.4 km/h.
What is the warmest month in Tome?
The warmest month in Tome is August (24.3 °C on average); the coldest is January (0.3 °C).
How much does it rain in Tome?
Tome receives on average 1,116 mm of precipitation per year, spread over about 129 rainy days.
Is it sunny in Tome?
Tome 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 Tome?
The heaviest 24-hour snowfall measured in Tome between 1940 and 2025 was 18 January 2016, with 34.0 cm.
Are there tropical nights in Tome?
Yes: Tome has on average 44 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Tome?
In Tome, between 1940 and 2025, the highest apparent temperature reached 43.2 °C on 4 August 2021, and the lowest was -25.0 °C on 8 February 1942.
Compare Tome with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Tome