Jiufen weather in May
In May, Jiufen sees average daytime highs of 26°C and overnight lows near 22°C, with 185 mm of rain across 17.6 wet days and about 13.2 hours of daylight. It is the 5th-warmest and 6th-wettest month of the year here.
Highs climb over the month, from about 25°C in the first days to 27°C by the end. The sky is clear or mostly clear about 13% 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 Jiufen's 8th-clearest and 10th-windiest month. For the whole year in context, see Jiufen's year-round climate.
- Daytime high
- 26°
- 5th warmest
- Overnight low
- 22°
- 8th coldest
- Rainfall
- 185 mm
- 17.6 wet days
- Daylight
- 13 h 12 min
- 5:12 AM – 6:25 PM
- Cloud cover
- 76%
- 8th clearest
- Wind
- 9 km/h
- 10th windiest
- Solar energy
- 4.8 kWh/m²
- Travel score
- 5.4
- out of 10
Jiufen is mountain area in Ruifang District near Keelung, Taiwan.
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in May
Highs climb over the month, from about 25°C in the first days to 27°C by the end.
A typical May day in Jiufen reaches about 26°C in the afternoon and slips back to 22°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 29°C. Set against its neighbours, May runs about 3°C warmer than April and about 3°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) | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 |
| Avg low (°C) | 21 | 21 | 21 | 21 | 21 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 24 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 25 | 21 |
| 2 | 25 | 21 |
| 3 | 25 | 21 |
| 4 | 25 | 21 |
| 5 | 25 | 21 |
| 6 | 25 | 22 |
| 7 | 25 | 22 |
| 8 | 25 | 22 |
| 9 | 25 | 22 |
| 10 | 26 | 22 |
| 11 | 26 | 22 |
| 12 | 26 | 22 |
| 13 | 26 | 22 |
| 14 | 26 | 22 |
| 15 | 26 | 22 |
| 16 | 26 | 23 |
| 17 | 26 | 23 |
| 18 | 26 | 23 |
| 19 | 26 | 23 |
| 20 | 26 | 23 |
| 21 | 26 | 23 |
| 22 | 26 | 23 |
| 23 | 26 | 23 |
| 24 | 27 | 23 |
| 25 | 27 | 23 |
| 26 | 27 | 23 |
| 27 | 27 | 23 |
| 28 | 27 | 24 |
| 29 | 27 | 24 |
| 30 | 27 | 24 |
| 31 | 27 | 24 |
How May really feels in Jiufen
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.
Jiufen weather by month
How May compares with the rest of the year at a glance. May is the 5th-warmest and 6th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 17° / 14° | 174 | 20.1 | 10.6 | 4.1 |
| Feb | 18° / 15° | 160 | 17.7 | 11.1 | 4.4 |
| Mar | 20° / 16° | 137 | 17 | 11.8 | 5.1 |
| Apr | 23° / 19° | 128 | 15.5 | 12.6 | 5.7 |
| May | 26° / 22° | 185 | 17.6 | 13.2 | 5.4 |
| Jun | 29° / 25° | 163 | 16.3 | 13.5 | 4.5 |
| Jul | 30° / 27° | 154 | 14 | 13.4 | 4.4 |
| Aug | 30° / 27° | 223 | 17.6 | 12.9 | 4.2 |
| Sep | 28° / 25° | 257 | 17.8 | 12.2 | 4.9 |
| Oct | 25° / 22° | 313 | 19.3 | 11.4 | 5.3 |
| Nov | 22° / 20° | 278 | 19.2 | 10.8 | 5.1 |
| Dec | 19° / 16° | 227 | 19.5 | 10.5 | 4.6 |
Cloud cover in May
The sky is clear or mostly clear about 13% of the time in May.
Beyond those clear spells, partly cloudy skies cover about 12% of May, with mostly cloudy or overcast conditions the remaining 75%. Skies tend to cloud over as the month goes on.
| 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 (%) | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 28 | 28 | 28 | 27 | 25 | 25 | 25 | 25 | 24 | 23 | 24 | 24 | 22 | 22 | 21 | 21 | 21 | 21 | 20 | 20 | 20 | 20 | 19 |
| Cloudier (%) | 72 | 71 | 71 | 71 | 71 | 71 | 71 | 71 | 72 | 72 | 72 | 73 | 75 | 75 | 75 | 75 | 76 | 77 | 76 | 76 | 78 | 78 | 79 | 79 | 79 | 79 | 80 | 80 | 80 | 80 | 81 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 28 | 72 |
| 2 | 29 | 71 |
| 3 | 29 | 71 |
| 4 | 29 | 71 |
| 5 | 29 | 71 |
| 6 | 29 | 71 |
| 7 | 29 | 71 |
| 8 | 29 | 71 |
| 9 | 28 | 72 |
| 10 | 28 | 72 |
| 11 | 28 | 72 |
| 12 | 27 | 73 |
| 13 | 25 | 75 |
| 14 | 25 | 75 |
| 15 | 25 | 75 |
| 16 | 25 | 75 |
| 17 | 24 | 76 |
| 18 | 23 | 77 |
| 19 | 24 | 76 |
| 20 | 24 | 76 |
| 21 | 22 | 78 |
| 22 | 22 | 78 |
| 23 | 21 | 79 |
| 24 | 21 | 79 |
| 25 | 21 | 79 |
| 26 | 21 | 79 |
| 27 | 20 | 80 |
| 28 | 20 | 80 |
| 29 | 20 | 80 |
| 30 | 20 | 80 |
| 31 | 19 | 81 |
Chance of precipitation in May
Jiufen gets around 185 mm of rain over 17.6 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 56% and peaks near 61% on the wettest days. The odds climb toward the end of the month.
| 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 (%) | 53 | 52 | 52 | 52 | 52 | 51 | 51 | 52 | 52 | 52 | 53 | 53 | 54 | 54 | 55 | 56 | 56 | 57 | 58 | 59 | 59 | 60 | 60 | 61 | 61 | 61 | 61 | 60 | 60 | 60 | 60 |
| Rain chance (%) | |
|---|---|
| 1 | 53 |
| 2 | 52 |
| 3 | 52 |
| 4 | 52 |
| 5 | 52 |
| 6 | 51 |
| 7 | 51 |
| 8 | 52 |
| 9 | 52 |
| 10 | 52 |
| 11 | 53 |
| 12 | 53 |
| 13 | 54 |
| 14 | 54 |
| 15 | 55 |
| 16 | 56 |
| 17 | 56 |
| 18 | 57 |
| 19 | 58 |
| 20 | 59 |
| 21 | 59 |
| 22 | 60 |
| 23 | 60 |
| 24 | 61 |
| 25 | 61 |
| 26 | 61 |
| 27 | 61 |
| 28 | 60 |
| 29 | 60 |
| 30 | 60 |
| 31 | 60 |
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 49% 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 | 3 | 2 | 2 | 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 | 0 |
| Comfortable (%) | 8 | 8 | 8 | 7 | 7 | 6 | 6 | 5 | 5 | 4 | 4 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 |
| Humid (%) | 18 | 18 | 18 | 18 | 17 | 16 | 16 | 15 | 15 | 14 | 14 | 13 | 12 | 12 | 11 | 10 | 10 | 9 | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 6 | 6 | 5 |
| Muggy (%) | 32 | 31 | 31 | 30 | 30 | 29 | 29 | 29 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 27 | 27 | 26 | 25 | 25 | 24 | 23 | 22 | 21 | 21 | 20 | 19 | 18 | 18 | 17 | 16 |
| Oppressive (%) | 38 | 39 | 41 | 42 | 44 | 45 | 46 | 47 | 48 | 49 | 49 | 50 | 51 | 51 | 52 | 53 | 52 | 53 | 53 | 52 | 53 | 53 | 52 | 52 | 50 | 50 | 52 | 51 | 50 | 50 | 49 |
| Miserable (%) | 1 | 1 | 1 | 1 | 2 | 2 | 3 | 3 | 4 | 4 | 5 | 6 | 6 | 7 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 16 | 17 | 19 | 20 | 21 | 23 | 25 | 27 | 28 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|---|
| 1 | 3 | 8 | 18 | 32 | 38 | 1 |
| 2 | 3 | 8 | 18 | 31 | 39 | 1 |
| 3 | 2 | 8 | 18 | 31 | 41 | 1 |
| 4 | 2 | 7 | 18 | 30 | 42 | 1 |
| 5 | 1 | 7 | 17 | 30 | 44 | 2 |
| 6 | 1 | 6 | 16 | 29 | 45 | 2 |
| 7 | 1 | 6 | 16 | 29 | 46 | 3 |
| 8 | 1 | 5 | 15 | 29 | 47 | 3 |
| 9 | 0 | 5 | 15 | 28 | 48 | 4 |
| 10 | 0 | 4 | 14 | 28 | 49 | 4 |
| 11 | 0 | 4 | 14 | 28 | 49 | 5 |
| 12 | 0 | 3 | 13 | 28 | 50 | 6 |
| 13 | 0 | 3 | 12 | 28 | 51 | 6 |
| 14 | 0 | 3 | 12 | 27 | 51 | 7 |
| 15 | 0 | 3 | 11 | 27 | 52 | 7 |
| 16 | 0 | 2 | 10 | 27 | 53 | 8 |
| 17 | 0 | 2 | 10 | 27 | 52 | 9 |
| 18 | 0 | 2 | 9 | 26 | 53 | 10 |
| 19 | 0 | 2 | 9 | 25 | 53 | 11 |
| 20 | 0 | 2 | 9 | 25 | 52 | 12 |
| 21 | 0 | 2 | 8 | 24 | 53 | 13 |
| 22 | 0 | 2 | 8 | 23 | 53 | 14 |
| 23 | 0 | 2 | 8 | 22 | 52 | 16 |
| 24 | 0 | 2 | 8 | 21 | 52 | 17 |
| 25 | 0 | 2 | 8 | 21 | 50 | 19 |
| 26 | 0 | 2 | 8 | 20 | 50 | 20 |
| 27 | 0 | 1 | 7 | 19 | 52 | 21 |
| 28 | 0 | 1 | 7 | 18 | 51 | 23 |
| 29 | 0 | 1 | 6 | 18 | 50 | 25 |
| 30 | 0 | 1 | 6 | 17 | 50 | 27 |
| 31 | 0 | 1 | 5 | 16 | 49 | 28 |
Wind in May
Winds average 9 km/h in May.
Across May, daily wind ranges from about 8 km/h on the calmest days to 10 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) | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 8 | 8 | 8 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 10 | calm |
| 2 | 10 | calm |
| 3 | 10 | calm |
| 4 | 10 | calm |
| 5 | 10 | calm |
| 6 | 10 | calm |
| 7 | 10 | calm |
| 8 | 10 | calm |
| 9 | 10 | calm |
| 10 | 9 | calm |
| 11 | 9 | calm |
| 12 | 9 | calm |
| 13 | 9 | calm |
| 14 | 9 | calm |
| 15 | 9 | calm |
| 16 | 9 | calm |
| 17 | 9 | calm |
| 18 | 9 | calm |
| 19 | 9 | calm |
| 20 | 9 | calm |
| 21 | 9 | calm |
| 22 | 9 | calm |
| 23 | 9 | calm |
| 24 | 9 | calm |
| 25 | 9 | calm |
| 26 | 9 | calm |
| 27 | 9 | calm |
| 28 | 9 | calm |
| 29 | 8 | calm |
| 30 | 8 | calm |
| 31 | 8 | calm |
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 | 12.9 | 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 | 5:21 | 5:20 | 5:20 | 5:19 | 5:18 | 5:18 | 5:17 | 5:16 | 5:16 | 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 | 5:07 | 5:07 | 5:07 |
| Sunset (PM) | 6:18 | 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 | 6:28 | 6:28 | 6:29 | 6:29 | 6:30 | 6:30 | 6:31 | 6:31 | 6:32 | 6:32 | 6:33 | 6:33 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.9 | 5:22 | 6:18 |
| 2 | 12.9 | 5:21 | 6:18 |
| 3 | 13.0 | 5:20 | 6:19 |
| 4 | 13.0 | 5:20 | 6:19 |
| 5 | 13.0 | 5:19 | 6:20 |
| 6 | 13.0 | 5:18 | 6:20 |
| 7 | 13.1 | 5:18 | 6:21 |
| 8 | 13.1 | 5:17 | 6:21 |
| 9 | 13.1 | 5:16 | 6:22 |
| 10 | 13.1 | 5:16 | 6:22 |
| 11 | 13.1 | 5:15 | 6:23 |
| 12 | 13.1 | 5:14 | 6:23 |
| 13 | 13.2 | 5:14 | 6:24 |
| 14 | 13.2 | 5:13 | 6:24 |
| 15 | 13.2 | 5:13 | 6:25 |
| 16 | 13.2 | 5:12 | 6:25 |
| 17 | 13.2 | 5:12 | 6:26 |
| 18 | 13.3 | 5:11 | 6:26 |
| 19 | 13.3 | 5:11 | 6:27 |
| 20 | 13.3 | 5:10 | 6:28 |
| 21 | 13.3 | 5:10 | 6:28 |
| 22 | 13.3 | 5:10 | 6:29 |
| 23 | 13.3 | 5:09 | 6:29 |
| 24 | 13.3 | 5:09 | 6:30 |
| 25 | 13.4 | 5:09 | 6:30 |
| 26 | 13.4 | 5:08 | 6:31 |
| 27 | 13.4 | 5:08 | 6:31 |
| 28 | 13.4 | 5:08 | 6:32 |
| 29 | 13.4 | 5:07 | 6:32 |
| 30 | 13.4 | 5:07 | 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 4.8 kWh/m².
For context, solar energy here swings from a low near 2.02 kWh/m² to a high of 5.9 kWh/m² in July across the year — May's 4.8 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) | 4.7 | 4.7 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 |
| 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 | 4.7 | Bright |
| 2 | 4.7 | Bright |
| 3 | 4.8 | Bright |
| 4 | 4.8 | Bright |
| 5 | 4.8 | Bright |
| 6 | 4.8 | Bright |
| 7 | 4.8 | Bright |
| 8 | 4.8 | Bright |
| 9 | 4.8 | Bright |
| 10 | 4.8 | Bright |
| 11 | 4.8 | Bright |
| 12 | 4.8 | Bright |
| 13 | 4.8 | Bright |
| 14 | 4.8 | Bright |
| 15 | 4.8 | Bright |
| 16 | 4.8 | Bright |
| 17 | 4.8 | Bright |
| 18 | 4.8 | Bright |
| 19 | 4.8 | Bright |
| 20 | 4.8 | Bright |
| 21 | 4.8 | Bright |
| 22 | 4.8 | Bright |
| 23 | 4.8 | Bright |
| 24 | 4.8 | Bright |
| 25 | 4.8 | Bright |
| 26 | 4.8 | Bright |
| 27 | 4.8 | Bright |
| 28 | 4.8 | Bright |
| 29 | 4.8 | Bright |
| 30 | 4.8 | Bright |
| 31 | 4.8 | Bright |
Hazard calendar for Jiufen
In May, Jiufen sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Jiufen sits in the Pacific typhoon belt; the season peaks July–October.
Is May a good time to visit Jiufen?
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 Jiufen for sightseeing.
What to pack for Jiufen in May
From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In May, Jiufen sees daytime highs around 26°C and nights near 22°C. Pack rain gear. Worth having: light clothes and sun protection. About 18 days see rain.
Sea temperature near Jiufen 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 offshore 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 Jiufen 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 Jiufen peaks around July 13 at about 12 (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 | 11 | 12 | 11 | 11 | 8 | 7 | 4 |
| Level | Moderate | Very high | Very high | Very high | Extreme | Extreme | Extreme | Extreme | 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 | 11 | Extreme |
| Jul | 12 | Extreme |
| Aug | 11 | Extreme |
| Sep | 11 | Extreme |
| Oct | 8 | Very high |
| Nov | 7 | High |
| Dec | 4 | Moderate |
Air quality in Jiufen 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 Jiufen is worst in April — around 52 µg/m³ PM2.5 (poor), about 2.1× the cleanest month (October, 25 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) | 38 | 43 | 51 | 52 | 44 | 41 | 32 | 32 | 30 | 25 | 32 | 32 |
| Level | Poor | Poor | Poor | Poor | Poor | Poor | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 38 | Poor |
| Feb | 43 | Poor |
| Mar | 51 | Poor |
| Apr | 52 | Poor |
| May | 44 | Poor |
| Jun | 41 | Poor |
| Jul | 32 | Moderate |
| Aug | 32 | Moderate |
| Sep | 30 | Moderate |
| Oct | 25 | Moderate |
| Nov | 32 | Moderate |
| Dec | 32 | Moderate |
Where is Jiufen?
Jiufen sits at 25.1°N, 121.8°E, 0 m above sea level, in Taiwan. The nearest listed city is Keelung, 11 km away.
Topography around Jiufen
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Jiufen.
Within 3 km, the terrain around Jiufen has large variations in elevation — a maximum elevation change of 710 m around an average of 221 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 752 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,425 m.
The land around Jiufen is covered by trees (77%) within 3 km, trees (48%) and water (48%) within 16 km, and water (64%) and trees (29%) 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 Jiufen (25.1096°, 121.8442°, elevation 0 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).