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Best time to visit · South Korea
May and October are the best time to visit Seoul on the climate data: October scores 94/100, with highs around 65°F (19°C) and 2.1 in (53 mm) of rain. April is a good shoulder-season month. The toughest months are January and July & August, mainly because of rain.
Highs run from 33°F to 83°F across the year, and the yearly total is about 48.9 in (1241 mm) of rain and snow.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high | 33°F1°C | 38°F3°C | 48°F9°C | 60°F15°C | 70°F21°C | 78°F26°C | 82°F28°C | 83°F28°C | 76°F25°C | 65°F19°C | 51°F11°C | 37°F3°C |
| Avg low | 20°F-7°C | 23°F-5°C | 30°F-1°C | 40°F5°C | 51°F11°C | 62°F17°C | 70°F21°C | 71°F22°C | 62°F17°C | 49°F10°C | 37°F3°C | 24°F-4°C |
| Rain/snow | 0.8 in20 mm | 1.2 in31 mm | 1.5 in37 mm | 2.8 in72 mm | 3.3 in84 mm | 4.6 in116 mm | 14.2 in361 mm | 10.2 in260 mm | 5.4 in138 mm | 2.1 in53 mm | 1.9 in47 mm | 0.9 in22 mm |
| Humidity | 77% | 74% | 74% | 74% | 75% | 76% | 84% | 83% | 79% | 75% | 75% | 76% |
| Cloud | 56% | 52% | 50% | 53% | 56% | 65% | 76% | 65% | 57% | 44% | 52% | 55% |
| Comfort | 51 | 53 | 65 | 80 | 86 | 75 | 47 | 48 | 73 | 94 | 70 | 52 |
Source: NASA POWER (public domain), 2001–2025 monthly averages on a ~50 km satellite and reanalysis grid, so coasts and valleys can differ from what's shown. The grid cell sits at about 73 m (240 ft), close to Seoul's own ~39 m. Precipitation includes snow as melted water; daylight is calculated from latitude. Check a forecast before you go.
The coldest season, with highs of 33–38°F (1–3°C) and lows down to 20°F (-7°C). It's the driest season, with only about 2.9 in (73 mm) of rain or snow, 6% of the year's total. December – February are cold enough for snow. It holds the toughest stretch on our comfort score (January), averaging 52/100.
Temperatures climb through the season, from 48°F highs in March to 70°F by May. About 7.6 in (193 mm) of rain falls across these months, 16% of the year's total. Nights dip below freezing in March. Comfort peaks here: May ranks with the year's best, and the season averages 77/100.
Peak warmth: highs of 78–83°F (26–28°C). It's the wettest season, with about 29.0 in (737 mm) of rain, 59% of the year's total. June – August feel humid, with humidity near 76%. It holds the toughest stretch on our comfort score (July & August), averaging 57/100.
Temperatures slide from 76°F highs in September to 51°F by November. About 9.4 in (238 mm) of rain falls across these months, 19% of the year's total. September feels humid, with humidity near 79%. Comfort peaks here: October ranks with the year's best, and the season averages 79/100.
By comfort score: 4 Great, 3 Good and 5 Fair. Great months: April – June and October. Tap a month for its own guide.
May and October are the best time to visit Seoul on the climate data: October scores 94/100, with highs around 65°F (19°C) and 2.1 in (53 mm) of rain. April is a good shoulder-season month. The toughest months are January and July & August, mainly because of rain.
July is the wettest month, averaging about 14.2 in (361 mm) of rain. January is the driest, with about 0.8 in (20 mm). The yearly total is around 48.9 in (1241 mm).
January is the coldest, with average lows of 20°F (-7°C) and highs of 33°F (1°C). The warmest is August, with average highs of 83°F (28°C).
Yes: in June – August humidity averages 76% with warm temperatures, so it feels muggy. Summer highs peak around 83°F (28°C).
On average, yes: lows fall below 32°F (0°C) in December – March, bottoming out around 20°F (-7°C) in January.
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