Yilan weather in July
In July, Yilan sees average daytime highs of 30°C and overnight lows near 25°C, with 271 mm of rain across 22.3 wet days and about 13.4 hours of daylight. It is the 1st-warmest and 7th-wettest month of the year here.
Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 19% of the time in July, and the air most often feels oppressive.
Daylight stretches from about 13 h 30 min at the start of July to 13 h 12 min by month's end. Set against the rest of the year, July is Yilan's 3rd-clearest and 11th-windiest month. For the whole year in context, see Yilan's year-round climate.
- Daytime high
- 30°
- 1st warmest
- Overnight low
- 25°
- 12th coldest
- Rainfall
- 271 mm
- 22.3 wet days
- Daylight
- 13 h 24 min
- 5:17 AM – 6:41 PM
- Cloud cover
- 70%
- 3rd clearest
- Wind
- 6 km/h
- 11th windiest
- Solar energy
- 5.81 kWh/m²
- Travel score
- 3.7
- 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 July
Day-to-day highs hold fairly steady near 30°C through the month.
A typical July day in Yilan reaches about 30°C in the afternoon and slips back to 25°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 31°C. Set against its neighbours, July runs about 1°C warmer than June and on par with August.
| 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) | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 |
| Avg low (°C) | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 30 | 25 |
| 2 | 30 | 25 |
| 3 | 30 | 25 |
| 4 | 30 | 25 |
| 5 | 30 | 25 |
| 6 | 30 | 25 |
| 7 | 30 | 25 |
| 8 | 30 | 25 |
| 9 | 30 | 25 |
| 10 | 30 | 25 |
| 11 | 30 | 25 |
| 12 | 30 | 25 |
| 13 | 30 | 25 |
| 14 | 30 | 25 |
| 15 | 30 | 25 |
| 16 | 30 | 25 |
| 17 | 30 | 25 |
| 18 | 30 | 25 |
| 19 | 30 | 25 |
| 20 | 30 | 25 |
| 21 | 30 | 25 |
| 22 | 30 | 25 |
| 23 | 30 | 25 |
| 24 | 30 | 25 |
| 25 | 30 | 25 |
| 26 | 30 | 25 |
| 27 | 30 | 25 |
| 28 | 30 | 25 |
| 29 | 30 | 25 |
| 30 | 30 | 25 |
| 31 | 30 | 25 |
How July really feels in Yilan
Once humidity and wind are folded in, July averages 31 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 July is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Yilan weather by month
How July compares with the rest of the year at a glance. July is the 1st-warmest and 7th-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 July
The sky is clear or mostly clear about 19% of the time in July.
Beyond those clear spells, partly cloudy skies cover about 16% of July, with mostly cloudy or overcast conditions the remaining 65%. 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 26 | 27 | 28 | 28 | 29 | 29 | 29 | 30 | 30 | 31 | 31 | 32 | 34 | 34 | 36 | 36 | 38 | 38 | 38 | 39 | 40 | 40 | 41 | 41 | 41 | 41 | 41 | 40 | 41 | 41 | 39 |
| Cloudier (%) | 74 | 73 | 72 | 72 | 71 | 71 | 71 | 70 | 70 | 69 | 69 | 68 | 66 | 66 | 64 | 64 | 62 | 62 | 62 | 61 | 60 | 60 | 59 | 59 | 59 | 59 | 59 | 60 | 59 | 59 | 61 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 26 | 74 |
| 2 | 27 | 73 |
| 3 | 28 | 72 |
| 4 | 28 | 72 |
| 5 | 29 | 71 |
| 6 | 29 | 71 |
| 7 | 29 | 71 |
| 8 | 30 | 70 |
| 9 | 30 | 70 |
| 10 | 31 | 69 |
| 11 | 31 | 69 |
| 12 | 32 | 68 |
| 13 | 34 | 66 |
| 14 | 34 | 66 |
| 15 | 36 | 64 |
| 16 | 36 | 64 |
| 17 | 38 | 62 |
| 18 | 38 | 62 |
| 19 | 38 | 62 |
| 20 | 39 | 61 |
| 21 | 40 | 60 |
| 22 | 40 | 60 |
| 23 | 41 | 59 |
| 24 | 41 | 59 |
| 25 | 41 | 59 |
| 26 | 41 | 59 |
| 27 | 41 | 59 |
| 28 | 40 | 60 |
| 29 | 41 | 59 |
| 30 | 41 | 59 |
| 31 | 39 | 61 |
Chance of precipitation in July
Yilan gets around 271 mm of rain over 22.3 wet days in July. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 72% and peaks near 78% 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 78 | 78 | 77 | 77 | 77 | 77 | 76 | 76 | 76 | 75 | 75 | 74 | 74 | 73 | 72 | 71 | 71 | 70 | 69 | 69 | 68 | 68 | 68 | 68 | 68 | 68 | 69 | 69 | 70 | 71 | 71 |
| Rain chance (%) | |
|---|---|
| 1 | 78 |
| 2 | 78 |
| 3 | 77 |
| 4 | 77 |
| 5 | 77 |
| 6 | 77 |
| 7 | 76 |
| 8 | 76 |
| 9 | 76 |
| 10 | 75 |
| 11 | 75 |
| 12 | 74 |
| 13 | 74 |
| 14 | 73 |
| 15 | 72 |
| 16 | 71 |
| 17 | 71 |
| 18 | 70 |
| 19 | 69 |
| 20 | 69 |
| 21 | 68 |
| 22 | 68 |
| 23 | 68 |
| 24 | 68 |
| 25 | 68 |
| 26 | 68 |
| 27 | 69 |
| 28 | 69 |
| 29 | 70 |
| 30 | 71 |
| 31 | 71 |
Humidity in July
Most of July feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, July lands in the oppressive band about 66% of days. Sticky, muggy-or-worse air turns up on roughly 100% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Oppressive (%) | 63 | 62 | 62 | 61 | 61 | 61 | 61 | 61 | 62 | 62 | 63 | 63 | 64 | 64 | 65 | 65 | 66 | 67 | 67 | 68 | 68 | 69 | 69 | 70 | 70 | 70 | 70 | 70 | 70 | 70 | 70 |
| Miserable (%) | 37 | 38 | 38 | 39 | 39 | 39 | 39 | 39 | 38 | 38 | 37 | 37 | 36 | 36 | 35 | 35 | 34 | 33 | 33 | 32 | 32 | 31 | 31 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 |
| Oppressive (%) | Miserable (%) | |
|---|---|---|
| 1 | 63 | 37 |
| 2 | 62 | 38 |
| 3 | 62 | 38 |
| 4 | 61 | 39 |
| 5 | 61 | 39 |
| 6 | 61 | 39 |
| 7 | 61 | 39 |
| 8 | 61 | 39 |
| 9 | 62 | 38 |
| 10 | 62 | 38 |
| 11 | 63 | 37 |
| 12 | 63 | 37 |
| 13 | 64 | 36 |
| 14 | 64 | 36 |
| 15 | 65 | 35 |
| 16 | 65 | 35 |
| 17 | 66 | 34 |
| 18 | 67 | 33 |
| 19 | 67 | 33 |
| 20 | 68 | 32 |
| 21 | 68 | 32 |
| 22 | 69 | 31 |
| 23 | 69 | 31 |
| 24 | 70 | 30 |
| 25 | 70 | 30 |
| 26 | 70 | 30 |
| 27 | 70 | 30 |
| 28 | 70 | 30 |
| 29 | 70 | 30 |
| 30 | 70 | 30 |
| 31 | 70 | 30 |
Wind in July
Winds average 6 km/h in July.
Across July, daily wind ranges from about 5 km/h on the calmest days to 6 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) | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| 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 | 5 | calm |
| 2 | 5 | calm |
| 3 | 5 | calm |
| 4 | 5 | calm |
| 5 | 5 | calm |
| 6 | 5 | calm |
| 7 | 5 | calm |
| 8 | 6 | calm |
| 9 | 6 | calm |
| 10 | 6 | calm |
| 11 | 6 | calm |
| 12 | 6 | calm |
| 13 | 6 | calm |
| 14 | 6 | calm |
| 15 | 6 | calm |
| 16 | 6 | calm |
| 17 | 6 | calm |
| 18 | 6 | calm |
| 19 | 6 | calm |
| 20 | 6 | calm |
| 21 | 6 | calm |
| 22 | 6 | calm |
| 23 | 6 | calm |
| 24 | 6 | calm |
| 25 | 6 | calm |
| 26 | 6 | calm |
| 27 | 6 | calm |
| 28 | 6 | calm |
| 29 | 6 | calm |
| 30 | 6 | calm |
| 31 | 6 | calm |
Sunrise & sunset in July
Daylight runs from about 13 h 30 min at the start of July to 13 h 12 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 18 minutes over July. Sunrise moves from 5:11 AM to 5:24 AM, and sunset from 6:42 PM to 6:35 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) | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.2 | 13.2 | 13.2 | 13.2 | 13.2 |
| Sunrise (AM) | 5:11 | 5:11 | 5:11 | 5:12 | 5:12 | 5:12 | 5:13 | 5:13 | 5:14 | 5:14 | 5:14 | 5:15 | 5:15 | 5:16 | 5:16 | 5:17 | 5:17 | 5:18 | 5:18 | 5:18 | 5:19 | 5:19 | 5:20 | 5:20 | 5:21 | 5:21 | 5:22 | 5:22 | 5:23 | 5:23 | 5:24 |
| Sunset (PM) | 6:42 | 6:42 | 6:42 | 6:42 | 6:42 | 6:42 | 6:42 | 6:42 | 6:42 | 6:42 | 6:42 | 6:41 | 6:41 | 6:41 | 6:41 | 6:41 | 6:40 | 6:40 | 6:40 | 6:39 | 6:39 | 6:39 | 6:38 | 6:38 | 6:38 | 6:37 | 6:37 | 6:36 | 6:36 | 6:35 | 6:35 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 13.5 | 5:11 | 6:42 |
| 2 | 13.5 | 5:11 | 6:42 |
| 3 | 13.5 | 5:11 | 6:42 |
| 4 | 13.5 | 5:12 | 6:42 |
| 5 | 13.5 | 5:12 | 6:42 |
| 6 | 13.5 | 5:12 | 6:42 |
| 7 | 13.5 | 5:13 | 6:42 |
| 8 | 13.5 | 5:13 | 6:42 |
| 9 | 13.5 | 5:14 | 6:42 |
| 10 | 13.5 | 5:14 | 6:42 |
| 11 | 13.5 | 5:14 | 6:42 |
| 12 | 13.4 | 5:15 | 6:41 |
| 13 | 13.4 | 5:15 | 6:41 |
| 14 | 13.4 | 5:16 | 6:41 |
| 15 | 13.4 | 5:16 | 6:41 |
| 16 | 13.4 | 5:17 | 6:41 |
| 17 | 13.4 | 5:17 | 6:40 |
| 18 | 13.4 | 5:18 | 6:40 |
| 19 | 13.4 | 5:18 | 6:40 |
| 20 | 13.3 | 5:18 | 6:39 |
| 21 | 13.3 | 5:19 | 6:39 |
| 22 | 13.3 | 5:19 | 6:39 |
| 23 | 13.3 | 5:20 | 6:38 |
| 24 | 13.3 | 5:20 | 6:38 |
| 25 | 13.3 | 5:21 | 6:38 |
| 26 | 13.3 | 5:21 | 6:37 |
| 27 | 13.2 | 5:22 | 6:37 |
| 28 | 13.2 | 5:22 | 6:36 |
| 29 | 13.2 | 5:23 | 6:36 |
| 30 | 13.2 | 5:23 | 6:35 |
| 31 | 13.2 | 5:24 | 6:35 |
Solar energy in July
Average shortwave solar energy reaching the ground each day in July, about 5.81 kWh/m² — the sunniest month for solar.
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 — July's 5.81 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 5.7 | 5.7 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.7 | 5.7 | 5.7 | 5.6 | 5.6 |
| 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 | 5.7 | Bright |
| 2 | 5.7 | Bright |
| 3 | 5.8 | Bright |
| 4 | 5.8 | Bright |
| 5 | 5.8 | Bright |
| 6 | 5.8 | Bright |
| 7 | 5.8 | Bright |
| 8 | 5.8 | Bright |
| 9 | 5.8 | Bright |
| 10 | 5.8 | Bright |
| 11 | 5.8 | Bright |
| 12 | 5.8 | Bright |
| 13 | 5.8 | Bright |
| 14 | 5.8 | Bright |
| 15 | 5.8 | Bright |
| 16 | 5.8 | Bright |
| 17 | 5.8 | Bright |
| 18 | 5.8 | Bright |
| 19 | 5.8 | Bright |
| 20 | 5.8 | Bright |
| 21 | 5.8 | Bright |
| 22 | 5.8 | Bright |
| 23 | 5.8 | Bright |
| 24 | 5.8 | Bright |
| 25 | 5.8 | Bright |
| 26 | 5.8 | Bright |
| 27 | 5.7 | Bright |
| 28 | 5.7 | Bright |
| 29 | 5.7 | Bright |
| 30 | 5.6 | Bright |
| 31 | 5.6 | Bright |
Hazard calendar for Yilan
In July, 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 July a good time to visit Yilan?
Our two travel scores rate July for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
July is a weaker month for outdoor sightseeing in Yilan.
What to pack for Yilan in July
From July's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In July, Yilan sees daytime highs around 30°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 22 days see rain.
Sea temperature near Yilan in July
The nearest coast averages about 28°C in July — 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 July
Clear-sky midday UV in July peaks around 12 (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 July
Average fine-particle pollution (PM2.5) through the year — so you can see where July 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).