Yilan weather in June
In June, Yilan sees average daytime highs of 28°C and overnight lows near 24°C, with 319 mm of rain across 25.3 wet days and about 13.5 hours of daylight. It is the 3rd-warmest and 5th-wettest month of the year here.
Highs climb over the month, from about 27°C in the first days to 29°C by the end. The sky is clear or mostly clear about 7% of the time in June, and the air most often feels oppressive.
Daylight stretches from about 13 h 24 min at the start of June to 13 h 30 min by month's end. Set against the rest of the year, June is Yilan's 12th-clearest and 12th-windiest month. For the whole year in context, see Yilan's year-round climate.
- Daytime high
- 28°
- 3rd warmest
- Overnight low
- 24°
- 10th coldest
- Rainfall
- 319 mm
- 25.3 wet days
- Daylight
- 13 h 30 min
- 5:07 AM – 6:39 PM
- Cloud cover
- 85%
- 12th clearest
- Wind
- 5 km/h
- 12th windiest
- Solar energy
- 5.06 kWh/m²
- Travel score
- 3.6
- out of 10
Yilan is A county-administered city in Yilan County, Taiwan.
- Density
- 3,203/km²
- people per km²
- Founded
- 1945
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in June
Highs climb over the month, from about 27°C in the first days to 29°C by the end.
A typical June day in Yilan reaches about 28°C in the afternoon and slips back to 24°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 30°C. Set against its neighbours, June runs about 3°C warmer than May and about 1°C cooler than July.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 30 |
| Avg low (°C) | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 27 | 23 |
| 2 | 27 | 23 |
| 3 | 27 | 23 |
| 4 | 27 | 23 |
| 5 | 27 | 23 |
| 6 | 27 | 23 |
| 7 | 27 | 23 |
| 8 | 27 | 23 |
| 9 | 28 | 23 |
| 10 | 28 | 23 |
| 11 | 28 | 24 |
| 12 | 28 | 24 |
| 13 | 28 | 24 |
| 14 | 28 | 24 |
| 15 | 28 | 24 |
| 16 | 28 | 24 |
| 17 | 28 | 24 |
| 18 | 29 | 24 |
| 19 | 29 | 24 |
| 20 | 29 | 24 |
| 21 | 29 | 24 |
| 22 | 29 | 25 |
| 23 | 29 | 25 |
| 24 | 29 | 25 |
| 25 | 29 | 25 |
| 26 | 29 | 25 |
| 27 | 29 | 25 |
| 28 | 29 | 25 |
| 29 | 29 | 25 |
| 30 | 30 | 25 |
How June really feels in Yilan
Once humidity and wind are folded in, June averages 13 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
The story in June is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Yilan weather by month
How June compares with the rest of the year at a glance. June is the 3rd-warmest and 5th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 17° / 13° | 190 | 22 | 10.6 | 3.6 |
| Feb | 17° / 13° | 164 | 19.7 | 11.1 | 3.9 |
| Mar | 19° / 15° | 152 | 19.9 | 11.8 | 4.6 |
| Apr | 22° / 18° | 185 | 20.8 | 12.6 | 4.8 |
| May | 25° / 21° | 297 | 25.2 | 13.2 | 4.3 |
| Jun | 28° / 24° | 319 | 25.3 | 13.5 | 3.6 |
| Jul | 30° / 25° | 271 | 22.3 | 13.4 | 3.7 |
| Aug | 29° / 25° | 329 | 22.9 | 12.9 | 3.7 |
| Sep | 27° / 24° | 336 | 20.5 | 12.2 | 4.6 |
| Oct | 24° / 21° | 394 | 21.6 | 11.4 | 4.9 |
| Nov | 21° / 18° | 336 | 21 | 10.8 | 4.6 |
| Dec | 18° / 14° | 244 | 21.7 | 10.5 | 4.1 |
Cloud cover in June
The sky is clear or mostly clear about 7% of the time in June, the cloudiest month of the year.
Beyond those clear spells, partly cloudy skies cover about 6% of June, with mostly cloudy or overcast conditions the remaining 87%. Skies tend to open up 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 14 | 13 | 13 | 12 | 11 | 10 | 10 | 9 | 9 | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 9 | 9 | 11 | 12 | 14 | 15 | 16 | 18 | 18 | 20 | 22 | 23 | 25 | 25 |
| Cloudier (%) | 86 | 87 | 87 | 88 | 89 | 90 | 90 | 91 | 91 | 93 | 93 | 93 | 93 | 93 | 92 | 92 | 91 | 91 | 89 | 88 | 86 | 85 | 84 | 82 | 82 | 80 | 78 | 77 | 75 | 75 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 14 | 86 |
| 2 | 13 | 87 |
| 3 | 13 | 87 |
| 4 | 12 | 88 |
| 5 | 11 | 89 |
| 6 | 10 | 90 |
| 7 | 10 | 90 |
| 8 | 9 | 91 |
| 9 | 9 | 91 |
| 10 | 7 | 93 |
| 11 | 7 | 93 |
| 12 | 7 | 93 |
| 13 | 7 | 93 |
| 14 | 7 | 93 |
| 15 | 8 | 92 |
| 16 | 8 | 92 |
| 17 | 9 | 91 |
| 18 | 9 | 91 |
| 19 | 11 | 89 |
| 20 | 12 | 88 |
| 21 | 14 | 86 |
| 22 | 15 | 85 |
| 23 | 16 | 84 |
| 24 | 18 | 82 |
| 25 | 18 | 82 |
| 26 | 20 | 80 |
| 27 | 22 | 78 |
| 28 | 23 | 77 |
| 29 | 25 | 75 |
| 30 | 25 | 75 |
Chance of precipitation in June
Yilan gets around 319 mm of rain over 25.3 wet days in June. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 84% and peaks near 87% on the wettest days. The odds ease 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 85 | 85 | 85 | 85 | 86 | 86 | 86 | 86 | 87 | 87 | 87 | 87 | 87 | 86 | 86 | 86 | 86 | 85 | 85 | 84 | 83 | 83 | 82 | 81 | 81 | 80 | 79 | 79 | 79 | 78 |
| Rain chance (%) | |
|---|---|
| 1 | 85 |
| 2 | 85 |
| 3 | 85 |
| 4 | 85 |
| 5 | 86 |
| 6 | 86 |
| 7 | 86 |
| 8 | 86 |
| 9 | 87 |
| 10 | 87 |
| 11 | 87 |
| 12 | 87 |
| 13 | 87 |
| 14 | 86 |
| 15 | 86 |
| 16 | 86 |
| 17 | 86 |
| 18 | 85 |
| 19 | 85 |
| 20 | 84 |
| 21 | 83 |
| 22 | 83 |
| 23 | 82 |
| 24 | 81 |
| 25 | 81 |
| 26 | 80 |
| 27 | 79 |
| 28 | 79 |
| 29 | 79 |
| 30 | 78 |
Humidity in June
Most of June feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, June lands in the oppressive band about 69% of days. Sticky, muggy-or-worse air turns up on roughly 97% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Comfortable (%) | 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 | 0 | 0 |
| Humid (%) | 8 | 7 | 7 | 6 | 5 | 5 | 4 | 4 | 4 | 3 | 3 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Muggy (%) | 20 | 19 | 18 | 17 | 17 | 16 | 15 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 8 | 7 | 6 | 5 | 4 | 3 | 3 | 2 | 2 | 1 | 1 | 1 | 0 | 0 | 0 |
| Oppressive (%) | 63 | 65 | 66 | 67 | 68 | 68 | 71 | 70 | 70 | 72 | 72 | 73 | 72 | 72 | 72 | 72 | 71 | 71 | 70 | 70 | 70 | 69 | 69 | 67 | 67 | 66 | 65 | 65 | 64 | 63 |
| Miserable (%) | 7 | 8 | 8 | 9 | 9 | 10 | 10 | 11 | 12 | 12 | 13 | 14 | 16 | 17 | 18 | 19 | 21 | 22 | 24 | 25 | 26 | 28 | 29 | 31 | 32 | 33 | 34 | 35 | 36 | 37 |
| Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|
| 1 | 2 | 8 | 20 | 63 | 7 |
| 2 | 1 | 7 | 19 | 65 | 8 |
| 3 | 1 | 7 | 18 | 66 | 8 |
| 4 | 1 | 6 | 17 | 67 | 9 |
| 5 | 1 | 5 | 17 | 68 | 9 |
| 6 | 1 | 5 | 16 | 68 | 10 |
| 7 | 0 | 4 | 15 | 71 | 10 |
| 8 | 0 | 4 | 15 | 70 | 11 |
| 9 | 0 | 4 | 14 | 70 | 12 |
| 10 | 0 | 3 | 13 | 72 | 12 |
| 11 | 0 | 3 | 12 | 72 | 13 |
| 12 | 0 | 2 | 11 | 73 | 14 |
| 13 | 0 | 2 | 10 | 72 | 16 |
| 14 | 0 | 2 | 9 | 72 | 17 |
| 15 | 0 | 2 | 8 | 72 | 18 |
| 16 | 0 | 1 | 8 | 72 | 19 |
| 17 | 0 | 1 | 7 | 71 | 21 |
| 18 | 0 | 1 | 6 | 71 | 22 |
| 19 | 0 | 1 | 5 | 70 | 24 |
| 20 | 0 | 1 | 4 | 70 | 25 |
| 21 | 0 | 1 | 3 | 70 | 26 |
| 22 | 0 | 0 | 3 | 69 | 28 |
| 23 | 0 | 0 | 2 | 69 | 29 |
| 24 | 0 | 0 | 2 | 67 | 31 |
| 25 | 0 | 0 | 1 | 67 | 32 |
| 26 | 0 | 0 | 1 | 66 | 33 |
| 27 | 0 | 0 | 1 | 65 | 34 |
| 28 | 0 | 0 | 0 | 65 | 35 |
| 29 | 0 | 0 | 0 | 64 | 36 |
| 30 | 0 | 0 | 0 | 63 | 37 |
Wind in June
Winds average 5 km/h in June, the calmest month.
Across June, daily wind ranges from about 5 km/h on the calmest days to 5 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| 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 |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 5 | calm |
| 2 | 5 | calm |
| 3 | 5 | calm |
| 4 | 5 | calm |
| 5 | 5 | calm |
| 6 | 5 | calm |
| 7 | 5 | calm |
| 8 | 5 | calm |
| 9 | 5 | calm |
| 10 | 5 | calm |
| 11 | 5 | calm |
| 12 | 5 | calm |
| 13 | 5 | calm |
| 14 | 5 | calm |
| 15 | 5 | calm |
| 16 | 5 | calm |
| 17 | 5 | calm |
| 18 | 5 | calm |
| 19 | 5 | calm |
| 20 | 5 | calm |
| 21 | 5 | calm |
| 22 | 5 | calm |
| 23 | 5 | calm |
| 24 | 5 | calm |
| 25 | 5 | calm |
| 26 | 5 | calm |
| 27 | 5 | calm |
| 28 | 5 | calm |
| 29 | 5 | calm |
| 30 | 5 | calm |
Sunrise & sunset in June
Daylight runs from about 13 h 24 min at the start of June to 13 h 30 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 6 minutes over June. Sunrise moves from 5:08 AM to 5:10 AM, and sunset from 6:33 PM to 6:42 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 13.4 | 13.4 | 13.4 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 |
| Sunrise (AM) | 5:08 | 5:08 | 5:08 | 5:07 | 5:07 | 5:07 | 5:07 | 5:07 | 5:07 | 5:07 | 5:07 | 5:07 | 5:07 | 5:07 | 5:07 | 5:07 | 5:08 | 5:08 | 5:08 | 5:08 | 5:08 | 5:08 | 5:09 | 5:09 | 5:09 | 5:09 | 5:10 | 5:10 | 5:10 | 5:10 |
| Sunset (PM) | 6:33 | 6:34 | 6:34 | 6:34 | 6:35 | 6:35 | 6:36 | 6:36 | 6:37 | 6:37 | 6:37 | 6:38 | 6:38 | 6:38 | 6:39 | 6:39 | 6:39 | 6:40 | 6:40 | 6:40 | 6:40 | 6:41 | 6:41 | 6:41 | 6:41 | 6:41 | 6:42 | 6:42 | 6:42 | 6:42 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 13.4 | 5:08 | 6:33 |
| 2 | 13.4 | 5:08 | 6:34 |
| 3 | 13.4 | 5:08 | 6:34 |
| 4 | 13.5 | 5:07 | 6:34 |
| 5 | 13.5 | 5:07 | 6:35 |
| 6 | 13.5 | 5:07 | 6:35 |
| 7 | 13.5 | 5:07 | 6:36 |
| 8 | 13.5 | 5:07 | 6:36 |
| 9 | 13.5 | 5:07 | 6:37 |
| 10 | 13.5 | 5:07 | 6:37 |
| 11 | 13.5 | 5:07 | 6:37 |
| 12 | 13.5 | 5:07 | 6:38 |
| 13 | 13.5 | 5:07 | 6:38 |
| 14 | 13.5 | 5:07 | 6:38 |
| 15 | 13.5 | 5:07 | 6:39 |
| 16 | 13.5 | 5:07 | 6:39 |
| 17 | 13.5 | 5:08 | 6:39 |
| 18 | 13.5 | 5:08 | 6:40 |
| 19 | 13.5 | 5:08 | 6:40 |
| 20 | 13.5 | 5:08 | 6:40 |
| 21 | 13.5 | 5:08 | 6:40 |
| 22 | 13.5 | 5:08 | 6:41 |
| 23 | 13.5 | 5:09 | 6:41 |
| 24 | 13.5 | 5:09 | 6:41 |
| 25 | 13.5 | 5:09 | 6:41 |
| 26 | 13.5 | 5:09 | 6:41 |
| 27 | 13.5 | 5:10 | 6:42 |
| 28 | 13.5 | 5:10 | 6:42 |
| 29 | 13.5 | 5:10 | 6:42 |
| 30 | 13.5 | 5:10 | 6:42 |
Solar energy in June
Average shortwave solar energy reaching the ground each day in June, about 5.06 kWh/m².
For context, solar energy here swings from a low near 2.07 kWh/m² to a high of 5.81 kWh/m² in July across the year — June's 5.06 kWh/m² sits near the top of that range.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 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 | 4.9 | 4.9 | 5.0 | 5.0 | 5.1 | 5.2 | 5.2 | 5.3 | 5.4 | 5.4 | 5.5 | 5.5 | 5.6 | 5.6 | 5.7 | 5.7 |
| 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 |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 4.8 | Bright |
| 2 | 4.8 | 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 | 4.9 | Bright |
| 16 | 4.9 | Bright |
| 17 | 5.0 | Bright |
| 18 | 5.0 | Bright |
| 19 | 5.1 | Bright |
| 20 | 5.2 | Bright |
| 21 | 5.2 | Bright |
| 22 | 5.3 | Bright |
| 23 | 5.4 | Bright |
| 24 | 5.4 | Bright |
| 25 | 5.5 | Bright |
| 26 | 5.5 | Bright |
| 27 | 5.6 | Bright |
| 28 | 5.6 | Bright |
| 29 | 5.7 | Bright |
| 30 | 5.7 | Bright |
Hazard calendar for Yilan
In June, Yilan sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Yilan sits in the Pacific typhoon belt; the season peaks July–October.
Is June a good time to visit Yilan?
Our two travel scores rate June for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
June is a weaker month for outdoor sightseeing in Yilan.
What to pack for Yilan in June
From June's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In June, Yilan sees daytime highs around 28°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 25 days see rain.
Sea temperature near Yilan in June
The nearest coast averages about 27°C in June — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 18 km away) is warmest in August at about 28°C and coldest in January near 22°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) | 22 | 22 | 23 | 24 | 26 | 27 | 28 | 28 | 28 | 26 | 25 | 23 |
| Comfort | Refreshing | Refreshing | Refreshing | Warm | Warm | Warm | Tropical | Tropical | Warm | Warm | Warm | Refreshing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 22 | Refreshing |
| Feb | 22 | Refreshing |
| Mar | 23 | Refreshing |
| Apr | 24 | Warm |
| May | 26 | Warm |
| Jun | 27 | Warm |
| Jul | 28 | Tropical |
| Aug | 28 | Tropical |
| Sep | 28 | Warm |
| Oct | 26 | Warm |
| Nov | 25 | Warm |
| Dec | 23 | Refreshing |
UV index in Yilan in June
Clear-sky midday UV in June peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Yilan peaks around July 14 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 5 (high).
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) | 6 | 8 | 9 | 7 | 10 | 11 | 12 | 10 | 11 | 8 | 7 | 5 |
| Level | High | Very high | Very high | High | Extreme | Extreme | Extreme | Very high | Extreme | Very high | High | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 6 | High |
| Feb | 8 | Very high |
| Mar | 9 | Very high |
| Apr | 7 | High |
| May | 10 | Extreme |
| Jun | 11 | Extreme |
| Jul | 12 | Extreme |
| Aug | 10 | Very high |
| Sep | 11 | Extreme |
| Oct | 8 | Very high |
| Nov | 7 | High |
| Dec | 5 | Moderate |
Air quality in Yilan in June
Average fine-particle pollution (PM2.5) through the year — so you can see where June falls, not just the annual average.
Air quality in Yilan 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 Yilan?
Yilan sits at 24.8°N, 121.8°E, 15 m above sea level, in Taiwan. The nearest listed city is Xizhi, 36 km away.
Topography around Yilan
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Yilan.
Within 3 km, the terrain around Yilan has only modest variations in elevation — a maximum elevation change of 33 m around an average of 9 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,413 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,839 m.
The land around Yilan is covered by cropland (40%), artificial surfaces (35%) and trees (21%) within 3 km, trees (50%) and water (23%) within 16 km, and trees (47%) and water (46%) 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 Yilan (24.757°, 121.753°, elevation 15 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).