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Sendai vs Seoul
Comparing Sendai change · Seoul change
Sendai and Seoul have nearly identical year-round temperatures; Seoul is the wetter, with 230 mm more rain a year, and Seoul the sunnier.
How the seasons compare
The differences between Sendai and Seoul, in everyday terms.
Summers
Seoul has hotter summers
Sendai: Warm
Seoul: Warm
Winters
Sendai has milder winters
Sendai: Cold
Seoul: Cold
Rain & snow
Seoul is wetter
Sendai: Wet
Seoul: Wet
Sky
Seoul is sunnier
Sendai: Often grey
Seoul: Partly cloudy
Month-by-month charts
Temperature
Sendai and Seoul run remarkably close all year.
Precipitation
Seoul is the wetter — about 230 mm more across the year.
Clear skies
Seoul has the clearer skies — the higher line.
Exact monthly numbers
Tap a metric to open its full table. Desktop shows all twelve months; on a phone each metric splits into Jan–Jun and Jul–Dec.
Avg high (°C) Varies through the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sendai | 6 | 7 | 10 | 16 | 20 | 23 | 27 | 28 | 25 | 20 | 14 | 8 |
| Seoul | 2 | 5 | 11 | 18 | 24 | 28 | 29 | 30 | 26 | 20 | 12 | 4 |
| Difference | -4 | -1 | +1 | +2 | +3 | +4 | +2 | +2 | +1 | — | -2 | -4 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Sendai | 6 | 7 | 10 | 16 | 20 | 23 |
| Seoul | 2 | 5 | 11 | 18 | 24 | 28 |
| Difference | -4 | -1 | +1 | +2 | +3 | +4 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Sendai | 27 | 28 | 25 | 20 | 14 | 8 |
| Seoul | 29 | 30 | 26 | 20 | 12 | 4 |
| Difference | +2 | +2 | +1 | — | -2 | -4 |
Avg low (°C) Varies through the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sendai | -1 | -1 | 1 | 6 | 12 | 16 | 20 | 22 | 18 | 12 | 6 | 1 |
| Seoul | -6 | -4 | 1 | 7 | 13 | 18 | 22 | 23 | 17 | 10 | 3 | -4 |
| Difference | -5 | -3 | — | +1 | +1 | +2 | +2 | +1 | -1 | -2 | -3 | -5 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Sendai | -1 | -1 | 1 | 6 | 12 | 16 |
| Seoul | -6 | -4 | 1 | 7 | 13 | 18 |
| Difference | -5 | -3 | — | +1 | +1 | +2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Sendai | 20 | 22 | 18 | 12 | 6 | 1 |
| Seoul | 22 | 23 | 17 | 10 | 3 | -4 |
| Difference | +2 | +1 | -1 | -2 | -3 | -5 |
Precipitation (mm) Sendai runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sendai | 42 | 34 | 74 | 90 | 110 | 144 | 178 | 158 | 193 | 151 | 59 | 44 |
| Seoul | 21 | 32 | 41 | 75 | 104 | 138 | 440 | 362 | 154 | 58 | 56 | 25 |
| Difference | -21 | -1 | -33 | -15 | -7 | -6 | +262 | +205 | -38 | -93 | -3 | -19 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Sendai | 42 | 34 | 74 | 90 | 110 | 144 |
| Seoul | 21 | 32 | 41 | 75 | 104 | 138 |
| Difference | -21 | -1 | -33 | -15 | -7 | -6 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Sendai | 178 | 158 | 193 | 151 | 59 | 44 |
| Seoul | 440 | 362 | 154 | 58 | 56 | 25 |
| Difference | +262 | +205 | -38 | -93 | -3 | -19 |
Cloud cover (%) Sendai runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sendai | 77 | 75 | 73 | 71 | 71 | 77 | 80 | 71 | 76 | 72 | 74 | 79 |
| Seoul | 51 | 50 | 52 | 55 | 58 | 67 | 75 | 65 | 56 | 46 | 52 | 51 |
| Difference | -26 | -26 | -21 | -16 | -12 | -10 | -5 | -6 | -20 | -27 | -22 | -27 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Sendai | 77 | 75 | 73 | 71 | 71 | 77 |
| Seoul | 51 | 50 | 52 | 55 | 58 | 67 |
| Difference | -26 | -26 | -21 | -16 | -12 | -10 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Sendai | 80 | 71 | 76 | 72 | 74 | 79 |
| Seoul | 75 | 65 | 56 | 46 | 52 | 51 |
| Difference | -5 | -6 | -20 | -27 | -22 | -27 |
Relative humidity (%) Sendai runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sendai | 95 | 93 | 87 | 82 | 81 | 83 | 86 | 85 | 87 | 87 | 89 | 93 |
| Seoul | 76 | 74 | 74 | 74 | 75 | 78 | 85 | 84 | 79 | 75 | 76 | 77 |
| Difference | -18 | -20 | -13 | -7 | -6 | -6 | -1 | -1 | -7 | -12 | -13 | -16 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Sendai | 95 | 93 | 87 | 82 | 81 | 83 |
| Seoul | 76 | 74 | 74 | 74 | 75 | 78 |
| Difference | -18 | -20 | -13 | -7 | -6 | -6 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Sendai | 86 | 85 | 87 | 87 | 89 | 93 |
| Seoul | 85 | 84 | 79 | 75 | 76 | 77 |
| Difference | -1 | -1 | -7 | -12 | -13 | -16 |
How both climates are changing
Both cities are warming. Each city has its own warming trend; see its trends page for the year-by-year detail. Sendai trends → · Seoul trends →
Methodology & sources
Sendai
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Sendai, about 3 km from the city centre.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.
Seoul
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Seoul City, a weather station, about 1 km from the city centre. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.