Castro-Urdiales weather in August
In August, Castro-Urdiales sees average daytime highs of 23°C and overnight lows near 19°C, with 49 mm of rain across 9.4 wet days and about 13.8 hours of daylight. It is the 1st-warmest and 11th-wettest month of the year here.
Day-to-day highs hold fairly steady near 23°C through the month. The sky is clear or mostly clear about 33% of the time in August, and the air most often feels humid.
Daylight stretches from about 14 h 24 min at the start of August to 13 h 06 min by month's end. Set against the rest of the year, August is Castro-Urdiales's 1st-clearest and 12th-windiest month. For the whole year in context, see Castro-Urdiales's year-round climate.
- Daytime high
- 23°
- 1st warmest
- Overnight low
- 19°
- 12th coldest
- Rainfall
- 49 mm
- 9.4 wet days
- Daylight
- 13 h 48 min
- 6:23 AM – 8:11 PM
- Cloud cover
- 52%
- 1st clearest
- Wind
- 12 km/h
- 12th windiest
- Solar energy
- 5.35 kWh/m²
- Travel score
- 7.0
- out of 10
Castro-Urdiales is capital of Castro-Urdiales Municipality, Spain.
- Air quality
- Good
- PM10 15.1 µg/m³ · 2019
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in August
Day-to-day highs hold fairly steady near 23°C through the month.
A typical August day in Castro-Urdiales reaches about 23°C in the afternoon and slips back to 19°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 25°C. Set against its neighbours, August runs about 1°C warmer than July and about 2°C warmer than September.
| 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) | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 |
| Avg low (°C) | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 18 | 18 | 18 | 18 | 18 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 23 | 19 |
| 2 | 23 | 19 |
| 3 | 23 | 19 |
| 4 | 23 | 19 |
| 5 | 23 | 19 |
| 6 | 23 | 19 |
| 7 | 23 | 19 |
| 8 | 23 | 19 |
| 9 | 23 | 19 |
| 10 | 23 | 19 |
| 11 | 23 | 19 |
| 12 | 23 | 19 |
| 13 | 23 | 19 |
| 14 | 23 | 19 |
| 15 | 23 | 19 |
| 16 | 23 | 19 |
| 17 | 23 | 19 |
| 18 | 23 | 19 |
| 19 | 23 | 19 |
| 20 | 23 | 19 |
| 21 | 23 | 19 |
| 22 | 23 | 19 |
| 23 | 22 | 19 |
| 24 | 22 | 19 |
| 25 | 22 | 19 |
| 26 | 22 | 19 |
| 27 | 22 | 18 |
| 28 | 22 | 18 |
| 29 | 22 | 18 |
| 30 | 22 | 18 |
| 31 | 22 | 18 |
Castro-Urdiales weather by month
How August compares with the rest of the year at a glance. August is the 1st-warmest and 11th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 12° / 9° | 119 | 15 | 9.2 | 2.9 |
| Feb | 12° / 8° | 103 | 13.5 | 10.2 | 2.9 |
| Mar | 14° / 10° | 98 | 13.2 | 11.6 | 3.7 |
| Apr | 15° / 11° | 89 | 13.8 | 13.2 | 4.0 |
| May | 17° / 13° | 69 | 12.7 | 14.5 | 5.1 |
| Jun | 20° / 16° | 56 | 9.9 | 15.2 | 6.2 |
| Jul | 22° / 18° | 46 | 9.1 | 14.9 | 6.9 |
| Aug | 23° / 19° | 49 | 9.4 | 13.8 | 7.0 |
| Sep | 21° / 17° | 66 | 10.9 | 12.3 | 6.4 |
| Oct | 19° / 15° | 103 | 13.8 | 10.8 | 5.5 |
| Nov | 15° / 12° | 152 | 16.1 | 9.5 | 3.9 |
| Dec | 13° / 10° | 117 | 14.9 | 8.8 | 3.3 |
Cloud cover in August
The sky is clear or mostly clear about 33% of the time in August, the clearest month of the year.
Beyond those clear spells, partly cloudy skies cover about 25% of August, with mostly cloudy or overcast conditions the remaining 42%.
| 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 (%) | 57 | 58 | 59 | 59 | 60 | 60 | 61 | 61 | 62 | 61 | 61 | 61 | 61 | 61 | 60 | 60 | 59 | 59 | 58 | 58 | 57 | 56 | 56 | 56 | 54 | 54 | 54 | 54 | 53 | 54 | 54 |
| Cloudier (%) | 43 | 42 | 41 | 41 | 40 | 40 | 39 | 39 | 38 | 39 | 39 | 39 | 39 | 39 | 40 | 40 | 41 | 41 | 42 | 42 | 43 | 44 | 44 | 44 | 46 | 46 | 46 | 46 | 47 | 46 | 46 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 57 | 43 |
| 2 | 58 | 42 |
| 3 | 59 | 41 |
| 4 | 59 | 41 |
| 5 | 60 | 40 |
| 6 | 60 | 40 |
| 7 | 61 | 39 |
| 8 | 61 | 39 |
| 9 | 62 | 38 |
| 10 | 61 | 39 |
| 11 | 61 | 39 |
| 12 | 61 | 39 |
| 13 | 61 | 39 |
| 14 | 61 | 39 |
| 15 | 60 | 40 |
| 16 | 60 | 40 |
| 17 | 59 | 41 |
| 18 | 59 | 41 |
| 19 | 58 | 42 |
| 20 | 58 | 42 |
| 21 | 57 | 43 |
| 22 | 56 | 44 |
| 23 | 56 | 44 |
| 24 | 56 | 44 |
| 25 | 54 | 46 |
| 26 | 54 | 46 |
| 27 | 54 | 46 |
| 28 | 54 | 46 |
| 29 | 53 | 47 |
| 30 | 54 | 46 |
| 31 | 54 | 46 |
Chance of precipitation in August
Castro-Urdiales gets around 49 mm of rain over 9.4 wet days in August. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 30% and peaks near 31% 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 (%) | 31 | 31 | 31 | 31 | 31 | 31 | 30 | 30 | 30 | 29 | 29 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 30 | 30 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 |
| Rain chance (%) | |
|---|---|
| 1 | 31 |
| 2 | 31 |
| 3 | 31 |
| 4 | 31 |
| 5 | 31 |
| 6 | 31 |
| 7 | 30 |
| 8 | 30 |
| 9 | 30 |
| 10 | 29 |
| 11 | 29 |
| 12 | 28 |
| 13 | 28 |
| 14 | 28 |
| 15 | 28 |
| 16 | 28 |
| 17 | 28 |
| 18 | 28 |
| 19 | 29 |
| 20 | 29 |
| 21 | 29 |
| 22 | 30 |
| 23 | 30 |
| 24 | 31 |
| 25 | 31 |
| 26 | 31 |
| 27 | 31 |
| 28 | 31 |
| 29 | 31 |
| 30 | 31 |
| 31 | 31 |
Humidity in August
Most of August feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, August lands in the humid band about 45% of days. Sticky, muggy-or-worse air turns up on roughly 21% 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 | 3 | 3 | 4 | 4 | 4 | 4 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 4 | 5 | 5 | 5 | 6 | 6 | 7 | 7 | 8 | 9 | 10 | 10 | 11 | 12 |
| Comfortable (%) | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 29 | 29 | 30 | 30 | 31 |
| Humid (%) | 50 | 49 | 49 | 48 | 47 | 47 | 47 | 46 | 46 | 46 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 44 | 44 | 43 | 43 | 42 | 41 | 41 | 40 | 39 |
| Muggy (%) | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 20 | 20 | 20 | 20 | 20 | 21 | 21 | 21 | 21 | 21 | 22 | 22 | 22 | 22 | 22 | 22 | 21 | 21 | 20 | 20 | 19 | 19 | 18 | 18 |
| Oppressive (%) | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| 1 | 3 | 27 | 50 | 19 | 2 |
| 2 | 3 | 27 | 49 | 19 | 2 |
| 3 | 3 | 27 | 49 | 19 | 2 |
| 4 | 3 | 27 | 48 | 19 | 2 |
| 5 | 4 | 28 | 47 | 19 | 2 |
| 6 | 4 | 28 | 47 | 19 | 2 |
| 7 | 4 | 28 | 47 | 19 | 2 |
| 8 | 4 | 28 | 46 | 20 | 2 |
| 9 | 5 | 27 | 46 | 20 | 2 |
| 10 | 5 | 27 | 46 | 20 | 2 |
| 11 | 5 | 28 | 45 | 20 | 2 |
| 12 | 5 | 28 | 45 | 20 | 2 |
| 13 | 5 | 28 | 45 | 21 | 2 |
| 14 | 5 | 28 | 45 | 21 | 2 |
| 15 | 5 | 28 | 45 | 21 | 1 |
| 16 | 5 | 28 | 45 | 21 | 1 |
| 17 | 5 | 28 | 45 | 21 | 1 |
| 18 | 4 | 28 | 45 | 22 | 1 |
| 19 | 5 | 27 | 45 | 22 | 1 |
| 20 | 5 | 27 | 45 | 22 | 1 |
| 21 | 5 | 27 | 45 | 22 | 1 |
| 22 | 6 | 27 | 45 | 22 | 1 |
| 23 | 6 | 27 | 44 | 22 | 1 |
| 24 | 7 | 27 | 44 | 21 | 0 |
| 25 | 7 | 28 | 43 | 21 | 0 |
| 26 | 8 | 28 | 43 | 20 | 0 |
| 27 | 9 | 29 | 42 | 20 | 0 |
| 28 | 10 | 29 | 41 | 19 | 0 |
| 29 | 10 | 30 | 41 | 19 | 0 |
| 30 | 11 | 30 | 40 | 18 | 0 |
| 31 | 12 | 31 | 39 | 18 | 0 |
Wind in August
Winds average 12 km/h in August, the calmest month.
Across August, daily wind ranges from about 12 km/h on the calmest days to 12 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) | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | 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 | 12 | calm |
| 2 | 12 | calm |
| 3 | 12 | calm |
| 4 | 12 | calm |
| 5 | 12 | calm |
| 6 | 12 | calm |
| 7 | 12 | calm |
| 8 | 12 | calm |
| 9 | 12 | calm |
| 10 | 12 | calm |
| 11 | 12 | calm |
| 12 | 12 | calm |
| 13 | 12 | calm |
| 14 | 12 | calm |
| 15 | 12 | calm |
| 16 | 12 | calm |
| 17 | 12 | calm |
| 18 | 12 | light breeze |
| 19 | 12 | light breeze |
| 20 | 12 | light breeze |
| 21 | 12 | light breeze |
| 22 | 12 | light breeze |
| 23 | 12 | light breeze |
| 24 | 12 | light breeze |
| 25 | 12 | light breeze |
| 26 | 12 | light breeze |
| 27 | 12 | light breeze |
| 28 | 12 | light breeze |
| 29 | 12 | light breeze |
| 30 | 12 | light breeze |
| 31 | 12 | light breeze |
Sunrise & sunset in August
Daylight runs from about 14 h 24 min at the start of August to 13 h 06 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 78 minutes over August. Sunrise moves from 6:06 AM to 6:40 AM, and sunset from 8:31 PM to 7:46 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) | 14.4 | 14.4 | 14.3 | 14.3 | 14.3 | 14.2 | 14.2 | 14.1 | 14.1 | 14.1 | 14.0 | 14.0 | 13.9 | 13.9 | 13.8 | 13.8 | 13.8 | 13.7 | 13.7 | 13.6 | 13.6 | 13.5 | 13.5 | 13.4 | 13.4 | 13.3 | 13.3 | 13.2 | 13.2 | 13.1 | 13.1 |
| Sunrise (AM) | 6:06 | 6:07 | 6:09 | 6:10 | 6:11 | 6:12 | 6:13 | 6:14 | 6:15 | 6:16 | 6:17 | 6:19 | 6:20 | 6:21 | 6:22 | 6:23 | 6:24 | 6:25 | 6:26 | 6:28 | 6:29 | 6:30 | 6:31 | 6:32 | 6:33 | 6:34 | 6:36 | 6:37 | 6:38 | 6:39 | 6:40 |
| Sunset (PM) | 8:31 | 8:30 | 8:29 | 8:28 | 8:27 | 8:25 | 8:24 | 8:23 | 8:21 | 8:20 | 8:18 | 8:17 | 8:15 | 8:14 | 8:12 | 8:11 | 8:09 | 8:08 | 8:06 | 8:05 | 8:03 | 8:01 | 8:00 | 7:58 | 7:56 | 7:54 | 7:53 | 7:51 | 7:49 | 7:47 | 7:46 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 14.4 | 6:06 | 8:31 |
| 2 | 14.4 | 6:07 | 8:30 |
| 3 | 14.3 | 6:09 | 8:29 |
| 4 | 14.3 | 6:10 | 8:28 |
| 5 | 14.3 | 6:11 | 8:27 |
| 6 | 14.2 | 6:12 | 8:25 |
| 7 | 14.2 | 6:13 | 8:24 |
| 8 | 14.1 | 6:14 | 8:23 |
| 9 | 14.1 | 6:15 | 8:21 |
| 10 | 14.1 | 6:16 | 8:20 |
| 11 | 14.0 | 6:17 | 8:18 |
| 12 | 14.0 | 6:19 | 8:17 |
| 13 | 13.9 | 6:20 | 8:15 |
| 14 | 13.9 | 6:21 | 8:14 |
| 15 | 13.8 | 6:22 | 8:12 |
| 16 | 13.8 | 6:23 | 8:11 |
| 17 | 13.8 | 6:24 | 8:09 |
| 18 | 13.7 | 6:25 | 8:08 |
| 19 | 13.7 | 6:26 | 8:06 |
| 20 | 13.6 | 6:28 | 8:05 |
| 21 | 13.6 | 6:29 | 8:03 |
| 22 | 13.5 | 6:30 | 8:01 |
| 23 | 13.5 | 6:31 | 8:00 |
| 24 | 13.4 | 6:32 | 7:58 |
| 25 | 13.4 | 6:33 | 7:56 |
| 26 | 13.3 | 6:34 | 7:54 |
| 27 | 13.3 | 6:36 | 7:53 |
| 28 | 13.2 | 6:37 | 7:51 |
| 29 | 13.2 | 6:38 | 7:49 |
| 30 | 13.1 | 6:39 | 7:47 |
| 31 | 13.1 | 6:40 | 7:46 |
Solar energy in August
Average shortwave solar energy reaching the ground each day in August, about 5.35 kWh/m².
For context, solar energy here swings from a low near 1.4 kWh/m² to a high of 6.12 kWh/m² in June across the year — August's 5.35 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) | 5.8 | 5.7 | 5.7 | 5.7 | 5.7 | 5.7 | 5.6 | 5.6 | 5.6 | 5.6 | 5.5 | 5.5 | 5.5 | 5.5 | 5.4 | 5.4 | 5.4 | 5.3 | 5.3 | 5.3 | 5.2 | 5.2 | 5.2 | 5.1 | 5.1 | 5.0 | 5.0 | 5.0 | 4.9 | 4.9 | 4.9 |
| 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 | 5.8 | Bright |
| 2 | 5.7 | Bright |
| 3 | 5.7 | Bright |
| 4 | 5.7 | Bright |
| 5 | 5.7 | Bright |
| 6 | 5.7 | Bright |
| 7 | 5.6 | Bright |
| 8 | 5.6 | Bright |
| 9 | 5.6 | Bright |
| 10 | 5.6 | Bright |
| 11 | 5.5 | Bright |
| 12 | 5.5 | Bright |
| 13 | 5.5 | Bright |
| 14 | 5.5 | Bright |
| 15 | 5.4 | Bright |
| 16 | 5.4 | Bright |
| 17 | 5.4 | Bright |
| 18 | 5.3 | Bright |
| 19 | 5.3 | Bright |
| 20 | 5.3 | Bright |
| 21 | 5.2 | Bright |
| 22 | 5.2 | Bright |
| 23 | 5.2 | Bright |
| 24 | 5.1 | Bright |
| 25 | 5.1 | Bright |
| 26 | 5.0 | Bright |
| 27 | 5.0 | Bright |
| 28 | 5.0 | Bright |
| 29 | 4.9 | Bright |
| 30 | 4.9 | Bright |
| 31 | 4.9 | Bright |
Is August a good time to visit Castro-Urdiales?
Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
August is one of the better times to visit Castro-Urdiales for general sightseeing.
What to pack for Castro-Urdiales in August
From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In August, Castro-Urdiales sees daytime highs around 23°C and nights near 19°C. Worth packing: light clothes, rain gear and sun protection. About 9 days see rain.
Sea temperature near Castro-Urdiales in August
The nearest coast averages about 22°C in August — 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 22°C and coldest in February near 13°C.
It's comfortable for a long swim from Jul 11 to Sep 21 — about 2.4 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 13 | 13 | 13 | 13 | 15 | 18 | 21 | 22 | 20 | 18 | 16 | 14 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Cool | Cool | Refreshing | Refreshing | Refreshing | Cool | Cool | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 13 | Bracing |
| Feb | 13 | Bracing |
| Mar | 13 | Bracing |
| Apr | 13 | Bracing |
| May | 15 | Cool |
| Jun | 18 | Cool |
| Jul | 21 | Refreshing |
| Aug | 22 | Refreshing |
| Sep | 20 | Refreshing |
| Oct | 18 | Cool |
| Nov | 16 | Cool |
| Dec | 14 | Bracing |
UV index in Castro-Urdiales in August
Clear-sky midday UV in August peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Castro-Urdiales peaks around July 15 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 2 | 5 | 6 | 6 | 8 | 9 | 8 | 5 | 4 | 2 | 1 |
| Level | Low | Low | Moderate | High | High | Very high | Very high | Very high | High | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 2 | Low |
| Mar | 5 | Moderate |
| Apr | 6 | High |
| May | 6 | High |
| Jun | 8 | Very high |
| Jul | 9 | Very high |
| Aug | 8 | Very high |
| Sep | 5 | High |
| Oct | 4 | Moderate |
| Nov | 2 | Low |
| Dec | 1 | Low |
Where is Castro-Urdiales?
Castro-Urdiales sits at 43.4°N, 3.2°W, 18 m above sea level, in Spain. The nearest listed city is Santurtzi, 16 km away.
Topography around Castro-Urdiales
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Castro-Urdiales.
Within 3 km, the terrain around Castro-Urdiales has significant variations in elevation — a maximum elevation change of 455 m around an average of 60 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 851 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,676 m.
The land around Castro-Urdiales is covered by water (46%) and trees (30%) within 3 km, water (50%) and trees (35%) within 16 km, and trees (37%), water (35%) and grassland (20%) within 80 km.
Spain travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / F
- 230 V · 50 Hz
- Prices
- ≈ 65% of US
- price level, 2025
- GDP per capita
- $38,627
- 2025
- Happiness
- 6.5 / 10
- World Happiness, 2025
- Safe drinking water
- 99%
- of population, 2024
- Homicide rate
- 0.7
- per 100k, 2023
- Road deaths
- 3.9
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Moderate
- EF EPI 540
- 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 Castro-Urdiales (43.3828°, -3.2204°, elevation 18 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. 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).