Keelung weather in May
In May, Keelung sees average daytime highs of 25°C and overnight lows near 23°C, with 163 mm of rain across 14.2 wet days and about 13.2 hours of daylight. It is the 5th-warmest and 8th-wettest month of the year here.
Highs climb over the month, from about 24°C in the first days to 26°C by the end. The sky is clear or mostly clear about 19% of the time in May, and the air most often feels oppressive.
Daylight stretches from about 12 h 54 min at the start of May to 13 h 24 min by month's end. Set against the rest of the year, May is Keelung's 8th-clearest and 10th-windiest month. For the whole year in context, see Keelung's year-round climate.
- Daytime high
- 25°
- 5th warmest
- Overnight low
- 23°
- 8th coldest
- Rainfall
- 163 mm
- 14.2 wet days
- Daylight
- 13 h 12 min
- 5:13 AM – 6:26 PM
- Cloud cover
- 71%
- 8th clearest
- Wind
- 15 km/h
- 10th windiest
- Solar energy
- 4.95 kWh/m²
- Travel score
- 6.0
- out of 10
Temperature in May
Highs climb over the month, from about 24°C in the first days to 26°C by the end.
A typical May day in Keelung reaches about 25°C in the afternoon and slips back to 23°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 27°C. Set against its neighbours, May runs about 3°C warmer than April and about 2°C cooler than June.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 24 | 24 | 24 | 24 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 |
| Avg low (°C) | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 24 | 22 |
| 2 | 24 | 22 |
| 3 | 24 | 22 |
| 4 | 24 | 22 |
| 5 | 25 | 22 |
| 6 | 25 | 22 |
| 7 | 25 | 22 |
| 8 | 25 | 22 |
| 9 | 25 | 23 |
| 10 | 25 | 23 |
| 11 | 25 | 23 |
| 12 | 25 | 23 |
| 13 | 25 | 23 |
| 14 | 25 | 23 |
| 15 | 25 | 23 |
| 16 | 25 | 23 |
| 17 | 25 | 23 |
| 18 | 25 | 23 |
| 19 | 26 | 23 |
| 20 | 26 | 23 |
| 21 | 26 | 24 |
| 22 | 26 | 24 |
| 23 | 26 | 24 |
| 24 | 26 | 24 |
| 25 | 26 | 24 |
| 26 | 26 | 24 |
| 27 | 26 | 24 |
| 28 | 26 | 24 |
| 29 | 26 | 24 |
| 30 | 26 | 24 |
| 31 | 26 | 24 |
How May really feels in Keelung
Once humidity and wind are folded in, May averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
May sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Keelung weather by month
How May compares with the rest of the year at a glance. May is the 5th-warmest and 8th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 18° / 15° | 178 | 19.4 | 10.6 | 4.3 |
| Feb | 18° / 15° | 172 | 17.1 | 11.1 | 4.5 |
| Mar | 20° / 17° | 160 | 17.6 | 11.8 | 5.1 |
| Apr | 23° / 20° | 133 | 14.5 | 12.6 | 5.9 |
| May | 25° / 23° | 163 | 14.2 | 13.2 | 6.0 |
| Jun | 28° / 26° | 141 | 13.2 | 13.5 | 5.4 |
| Jul | 29° / 27° | 103 | 9.2 | 13.4 | 5.5 |
| Aug | 29° / 27° | 171 | 12.8 | 12.9 | 5.3 |
| Sep | 27° / 26° | 192 | 15.2 | 12.2 | 5.7 |
| Oct | 25° / 23° | 205 | 15.5 | 11.4 | 6.0 |
| Nov | 22° / 20° | 195 | 17.6 | 10.8 | 5.4 |
| Dec | 19° / 17° | 186 | 18.9 | 10.5 | 4.8 |
Cloud cover in May
The sky is clear or mostly clear about 19% of the time in May.
Beyond those clear spells, partly cloudy skies cover about 13% of May, with mostly cloudy or overcast conditions the remaining 69%.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 33 | 34 | 34 | 34 | 34 | 34 | 34 | 33 | 34 | 33 | 33 | 33 | 32 | 32 | 32 | 33 | 32 | 32 | 31 | 31 | 32 | 30 | 30 | 30 | 29 | 29 | 29 | 27 | 27 | 27 | 26 |
| Cloudier (%) | 67 | 66 | 66 | 66 | 66 | 66 | 66 | 67 | 66 | 67 | 67 | 67 | 68 | 68 | 68 | 67 | 68 | 68 | 69 | 69 | 68 | 70 | 70 | 70 | 71 | 71 | 71 | 73 | 73 | 73 | 74 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 33 | 67 |
| 2 | 34 | 66 |
| 3 | 34 | 66 |
| 4 | 34 | 66 |
| 5 | 34 | 66 |
| 6 | 34 | 66 |
| 7 | 34 | 66 |
| 8 | 33 | 67 |
| 9 | 34 | 66 |
| 10 | 33 | 67 |
| 11 | 33 | 67 |
| 12 | 33 | 67 |
| 13 | 32 | 68 |
| 14 | 32 | 68 |
| 15 | 32 | 68 |
| 16 | 33 | 67 |
| 17 | 32 | 68 |
| 18 | 32 | 68 |
| 19 | 31 | 69 |
| 20 | 31 | 69 |
| 21 | 32 | 68 |
| 22 | 30 | 70 |
| 23 | 30 | 70 |
| 24 | 30 | 70 |
| 25 | 29 | 71 |
| 26 | 29 | 71 |
| 27 | 29 | 71 |
| 28 | 27 | 73 |
| 29 | 27 | 73 |
| 30 | 27 | 73 |
| 31 | 26 | 74 |
Chance of precipitation in May
Keelung gets around 163 mm of rain over 14.2 wet days in May. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 46% and peaks near 48% on the wettest days.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 44 | 43 | 43 | 43 | 43 | 43 | 43 | 43 | 44 | 44 | 45 | 45 | 46 | 46 | 47 | 47 | 47 | 48 | 48 | 48 | 48 | 48 | 48 | 48 | 48 | 47 | 47 | 47 | 47 | 48 | 48 |
| Rain chance (%) | |
|---|---|
| 1 | 44 |
| 2 | 43 |
| 3 | 43 |
| 4 | 43 |
| 5 | 43 |
| 6 | 43 |
| 7 | 43 |
| 8 | 43 |
| 9 | 44 |
| 10 | 44 |
| 11 | 45 |
| 12 | 45 |
| 13 | 46 |
| 14 | 46 |
| 15 | 47 |
| 16 | 47 |
| 17 | 47 |
| 18 | 48 |
| 19 | 48 |
| 20 | 48 |
| 21 | 48 |
| 22 | 48 |
| 23 | 48 |
| 24 | 48 |
| 25 | 48 |
| 26 | 47 |
| 27 | 47 |
| 28 | 47 |
| 29 | 47 |
| 30 | 48 |
| 31 | 48 |
Humidity in May
Most of May feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, May lands in the oppressive band about 47% of days. Sticky, muggy-or-worse air turns up on roughly 85% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 3 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Comfortable (%) | 8 | 7 | 7 | 6 | 6 | 5 | 5 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 |
| Humid (%) | 18 | 18 | 17 | 17 | 16 | 16 | 15 | 15 | 14 | 14 | 13 | 12 | 12 | 11 | 11 | 10 | 9 | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 6 | 6 | 6 |
| Muggy (%) | 29 | 29 | 29 | 29 | 28 | 28 | 27 | 27 | 27 | 27 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 24 | 24 | 23 | 22 | 22 | 21 | 21 | 20 | 19 | 19 | 18 | 17 | 17 | 16 |
| Oppressive (%) | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 47 | 48 | 48 | 48 | 49 | 49 | 49 | 50 | 50 | 50 | 50 | 50 | 49 | 49 | 48 | 48 | 47 | 47 | 46 | 46 | 46 | 46 | 45 |
| Miserable (%) | 2 | 2 | 3 | 3 | 4 | 5 | 5 | 6 | 7 | 8 | 9 | 10 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 21 | 22 | 23 | 25 | 26 | 28 | 29 | 31 | 32 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|---|
| 1 | 3 | 8 | 18 | 29 | 40 | 2 |
| 2 | 2 | 7 | 18 | 29 | 41 | 2 |
| 3 | 2 | 7 | 17 | 29 | 42 | 3 |
| 4 | 2 | 6 | 17 | 29 | 43 | 3 |
| 5 | 1 | 6 | 16 | 28 | 44 | 4 |
| 6 | 1 | 5 | 16 | 28 | 45 | 5 |
| 7 | 1 | 5 | 15 | 27 | 46 | 5 |
| 8 | 1 | 4 | 15 | 27 | 47 | 6 |
| 9 | 1 | 4 | 14 | 27 | 47 | 7 |
| 10 | 0 | 4 | 14 | 27 | 48 | 8 |
| 11 | 0 | 3 | 13 | 26 | 48 | 9 |
| 12 | 0 | 3 | 12 | 26 | 48 | 10 |
| 13 | 0 | 3 | 12 | 26 | 49 | 10 |
| 14 | 0 | 3 | 11 | 26 | 49 | 11 |
| 15 | 0 | 3 | 11 | 26 | 49 | 12 |
| 16 | 0 | 2 | 10 | 25 | 50 | 13 |
| 17 | 0 | 2 | 9 | 25 | 50 | 14 |
| 18 | 0 | 2 | 9 | 24 | 50 | 15 |
| 19 | 0 | 2 | 9 | 24 | 50 | 16 |
| 20 | 0 | 2 | 8 | 23 | 50 | 17 |
| 21 | 0 | 2 | 8 | 22 | 49 | 18 |
| 22 | 0 | 2 | 8 | 22 | 49 | 19 |
| 23 | 0 | 2 | 8 | 21 | 48 | 21 |
| 24 | 0 | 2 | 8 | 21 | 48 | 22 |
| 25 | 0 | 2 | 8 | 20 | 47 | 23 |
| 26 | 0 | 2 | 7 | 19 | 47 | 25 |
| 27 | 0 | 2 | 7 | 19 | 46 | 26 |
| 28 | 0 | 1 | 7 | 18 | 46 | 28 |
| 29 | 0 | 1 | 6 | 17 | 46 | 29 |
| 30 | 0 | 1 | 6 | 17 | 46 | 31 |
| 31 | 0 | 1 | 6 | 16 | 45 | 32 |
Wind in May
Winds average 15 km/h in May.
Across May, daily wind ranges from about 13 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 16 | light breeze |
| 2 | 16 | light breeze |
| 3 | 16 | light breeze |
| 4 | 16 | light breeze |
| 5 | 16 | light breeze |
| 6 | 16 | light breeze |
| 7 | 16 | light breeze |
| 8 | 16 | light breeze |
| 9 | 16 | light breeze |
| 10 | 16 | light breeze |
| 11 | 15 | light breeze |
| 12 | 15 | light breeze |
| 13 | 15 | light breeze |
| 14 | 15 | light breeze |
| 15 | 15 | light breeze |
| 16 | 15 | light breeze |
| 17 | 15 | light breeze |
| 18 | 15 | light breeze |
| 19 | 15 | light breeze |
| 20 | 15 | light breeze |
| 21 | 15 | light breeze |
| 22 | 14 | light breeze |
| 23 | 14 | light breeze |
| 24 | 14 | light breeze |
| 25 | 14 | light breeze |
| 26 | 14 | light breeze |
| 27 | 14 | light breeze |
| 28 | 14 | light breeze |
| 29 | 14 | light breeze |
| 30 | 13 | light breeze |
| 31 | 13 | light breeze |
Sunrise & sunset in May
Daylight runs from about 12 h 54 min at the start of May to 13 h 24 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 30 minutes over May. Sunrise moves from 5:22 AM to 5:07 AM, and sunset from 6:18 PM to 6:33 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 12.9 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 13.1 | 13.1 | 13.1 | 13.1 | 13.1 | 13.1 | 13.2 | 13.2 | 13.2 | 13.2 | 13.2 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 |
| Sunrise (AM) | 5:22 | 5:22 | 5:21 | 5:20 | 5:19 | 5:19 | 5:18 | 5:17 | 5:17 | 5:16 | 5:15 | 5:15 | 5:14 | 5:14 | 5:13 | 5:13 | 5:12 | 5:12 | 5:11 | 5:11 | 5:10 | 5:10 | 5:10 | 5:09 | 5:09 | 5:09 | 5:08 | 5:08 | 5:08 | 5:08 | 5:07 |
| Sunset (PM) | 6:18 | 6:19 | 6:19 | 6:20 | 6:20 | 6:21 | 6:21 | 6:22 | 6:22 | 6:23 | 6:23 | 6:24 | 6:24 | 6:25 | 6:25 | 6:26 | 6:26 | 6:27 | 6:27 | 6:28 | 6:28 | 6:29 | 6:30 | 6:30 | 6:31 | 6:31 | 6:32 | 6:32 | 6:33 | 6:33 | 6:33 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.9 | 5:22 | 6:18 |
| 2 | 13.0 | 5:22 | 6:19 |
| 3 | 13.0 | 5:21 | 6:19 |
| 4 | 13.0 | 5:20 | 6:20 |
| 5 | 13.0 | 5:19 | 6:20 |
| 6 | 13.0 | 5:19 | 6:21 |
| 7 | 13.1 | 5:18 | 6:21 |
| 8 | 13.1 | 5:17 | 6:22 |
| 9 | 13.1 | 5:17 | 6:22 |
| 10 | 13.1 | 5:16 | 6:23 |
| 11 | 13.1 | 5:15 | 6:23 |
| 12 | 13.1 | 5:15 | 6:24 |
| 13 | 13.2 | 5:14 | 6:24 |
| 14 | 13.2 | 5:14 | 6:25 |
| 15 | 13.2 | 5:13 | 6:25 |
| 16 | 13.2 | 5:13 | 6:26 |
| 17 | 13.2 | 5:12 | 6:26 |
| 18 | 13.3 | 5:12 | 6:27 |
| 19 | 13.3 | 5:11 | 6:27 |
| 20 | 13.3 | 5:11 | 6:28 |
| 21 | 13.3 | 5:10 | 6:28 |
| 22 | 13.3 | 5:10 | 6:29 |
| 23 | 13.3 | 5:10 | 6:30 |
| 24 | 13.3 | 5:09 | 6:30 |
| 25 | 13.4 | 5:09 | 6:31 |
| 26 | 13.4 | 5:09 | 6:31 |
| 27 | 13.4 | 5:08 | 6:32 |
| 28 | 13.4 | 5:08 | 6:32 |
| 29 | 13.4 | 5:08 | 6:33 |
| 30 | 13.4 | 5:08 | 6:33 |
| 31 | 13.4 | 5:07 | 6:33 |
Solar energy in May
Average shortwave solar energy reaching the ground each day in May, about 4.95 kWh/m².
For context, solar energy here swings from a low near 2.08 kWh/m² to a high of 6.15 kWh/m² in July across the year — May's 4.95 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 4.8 | 4.9 | 4.9 | 4.9 | 4.9 | 4.9 | 4.9 | 4.9 | 4.9 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 4.8 | Bright |
| 2 | 4.9 | Bright |
| 3 | 4.9 | Bright |
| 4 | 4.9 | Bright |
| 5 | 4.9 | Bright |
| 6 | 4.9 | Bright |
| 7 | 4.9 | Bright |
| 8 | 4.9 | Bright |
| 9 | 4.9 | Bright |
| 10 | 5.0 | Bright |
| 11 | 5.0 | Bright |
| 12 | 5.0 | Bright |
| 13 | 5.0 | Bright |
| 14 | 5.0 | Bright |
| 15 | 5.0 | Bright |
| 16 | 5.0 | Bright |
| 17 | 5.0 | Bright |
| 18 | 5.0 | Bright |
| 19 | 5.0 | Bright |
| 20 | 5.0 | Bright |
| 21 | 5.0 | Bright |
| 22 | 5.0 | Bright |
| 23 | 5.0 | Bright |
| 24 | 5.0 | Bright |
| 25 | 5.0 | Bright |
| 26 | 5.0 | Bright |
| 27 | 5.0 | Bright |
| 28 | 5.0 | Bright |
| 29 | 5.0 | Bright |
| 30 | 5.0 | Bright |
| 31 | 5.0 | Bright |
Hazard calendar for Keelung
In May, Keelung sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Keelung sits in the Pacific typhoon belt; the season peaks July–October.
Is May a good time to visit Keelung?
Our two travel scores rate May for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
May is a reasonable time to visit Keelung for sightseeing.
What to pack for Keelung in May
From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In May, Keelung sees daytime highs around 25°C and nights near 23°C. Pack rain gear. Worth having: light clothes and sun protection. About 14 days see rain.
Sea temperature near Keelung in May
The nearest coast averages about 25°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 14 km away) is warmest in August at about 28°C and coldest in January near 21°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 21 | 21 | 22 | 24 | 25 | 27 | 28 | 28 | 27 | 26 | 24 | 23 |
| Comfort | Refreshing | Refreshing | Refreshing | Refreshing | Warm | Warm | Tropical | Tropical | Warm | Warm | Warm | Refreshing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 21 | Refreshing |
| Feb | 21 | Refreshing |
| Mar | 22 | Refreshing |
| Apr | 24 | Refreshing |
| May | 25 | Warm |
| Jun | 27 | Warm |
| Jul | 28 | Tropical |
| Aug | 28 | Tropical |
| Sep | 27 | Warm |
| Oct | 26 | Warm |
| Nov | 24 | Warm |
| Dec | 23 | Refreshing |
UV index in Keelung in May
Clear-sky midday UV in May peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Keelung peaks around June 18 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 4 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 5 | 7 | 9 | 8 | 10 | 12 | 11 | 9 | 11 | 8 | 7 | 4 |
| Level | Moderate | Very high | Very high | Very high | Extreme | Extreme | Extreme | Very high | Extreme | Very high | High | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 5 | Moderate |
| Feb | 7 | Very high |
| Mar | 9 | Very high |
| Apr | 8 | Very high |
| May | 10 | Extreme |
| Jun | 12 | Extreme |
| Jul | 11 | Extreme |
| Aug | 9 | Very high |
| Sep | 11 | Extreme |
| Oct | 8 | Very high |
| Nov | 7 | High |
| Dec | 4 | Moderate |
Air quality in Keelung in May
Average fine-particle pollution (PM2.5) through the year — so you can see where May falls, not just the annual average.
Air quality in Keelung is worst in April — around 47 µg/m³ PM2.5 (poor), about 2.3× the cleanest month (October, 20 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 29 | 36 | 44 | 47 | 42 | 42 | 34 | 28 | 24 | 20 | 25 | 25 |
| Level | Moderate | Poor | Poor | Poor | Poor | Poor | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 29 | Moderate |
| Feb | 36 | Poor |
| Mar | 44 | Poor |
| Apr | 47 | Poor |
| May | 42 | Poor |
| Jun | 42 | Poor |
| Jul | 34 | Moderate |
| Aug | 28 | Moderate |
| Sep | 24 | Moderate |
| Oct | 20 | Moderate |
| Nov | 25 | Moderate |
| Dec | 25 | Moderate |
Where is Keelung?
Keelung sits at 25.1°N, 121.7°E, 19 m above sea level, in Taiwan. The nearest listed city is Jiufen, 11 km away.
Topography around Keelung
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Keelung.
Within 3 km, the terrain around Keelung has only modest variations in elevation — a maximum elevation change of 197 m around an average of 58 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 907 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,613 m.
The land around Keelung is covered by trees (58%) and artificial surfaces (32%) within 3 km, trees (59%) and water (35%) within 16 km, and water (62%) and trees (31%) within 80 km.
Taiwan travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type A / B
- 110 / 220 V · 60 Hz
- Happiness
- 6.7 / 10
- World Happiness, 2025
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Keelung (25.1309°, 121.7409°, elevation 19 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).