Saint Peter Port weather in April
In April, Saint Peter Port sees average daytime highs of 11°C and overnight lows near 9°C, with 50 mm of rain across 9.7 wet days and about 13.4 hours of daylight. It is the 9th-warmest and 8th-wettest month of the year here.
Day-to-day highs hold fairly steady near 11°C through the month. The sky is clear or mostly clear about 32% of the time in April, and the air most often feels dry.
Daylight stretches from about 12 h 30 min at the start of April to 14 h 18 min by month's end. Set against the rest of the year, April is Saint Peter Port's 6th-clearest and 8th-windiest month. For the whole year in context, see Saint Peter Port's year-round climate.
- Daytime high
- 11°
- 9th warmest
- Overnight low
- 9°
- 5th coldest
- Rainfall
- 50 mm
- 9.7 wet days
- Daylight
- 13 h 30 min
- 5:26 AM – 6:55 PM
- Cloud cover
- 59%
- 6th clearest
- Wind
- 26 km/h
- 8th windiest
- Solar energy
- 4.86 kWh/m²
- Travel score
- 2.6
- out of 10
Saint Peter Port is parish, port, and capital of Guernsey in the Channel Islands.
- Density
- 2,537/km²
- people per km²
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in April
Day-to-day highs hold fairly steady near 11°C through the month.
A typical April day in Saint Peter Port reaches about 11°C in the afternoon and slips back to 9°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 9°C and 12°C. Set against its neighbours, April runs about 1°C warmer than March and about 2°C cooler than May.
| 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) | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 |
| Avg low (°C) | 8 | 8 | 8 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 10 | 8 |
| 2 | 10 | 8 |
| 3 | 10 | 8 |
| 4 | 10 | 9 |
| 5 | 10 | 9 |
| 6 | 10 | 9 |
| 7 | 10 | 9 |
| 8 | 10 | 9 |
| 9 | 10 | 9 |
| 10 | 10 | 9 |
| 11 | 10 | 9 |
| 12 | 10 | 9 |
| 13 | 10 | 9 |
| 14 | 11 | 9 |
| 15 | 11 | 9 |
| 16 | 11 | 9 |
| 17 | 11 | 9 |
| 18 | 11 | 9 |
| 19 | 11 | 9 |
| 20 | 11 | 9 |
| 21 | 11 | 9 |
| 22 | 11 | 9 |
| 23 | 11 | 10 |
| 24 | 11 | 10 |
| 25 | 11 | 10 |
| 26 | 11 | 10 |
| 27 | 11 | 10 |
| 28 | 11 | 10 |
| 29 | 11 | 10 |
| 30 | 11 | 10 |
Saint Peter Port weather by month
How April compares with the rest of the year at a glance. April is the 9th-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 | 10° / 8° | 98 | 15.7 | 8.4 | 1.8 |
| Feb | 9° / 7° | 74 | 13.3 | 9.8 | 1.7 |
| Mar | 10° / 8° | 58 | 11.5 | 11.5 | 2.0 |
| Apr | 11° / 9° | 50 | 9.7 | 13.4 | 2.6 |
| May | 13° / 11° | 45 | 7.9 | 15.1 | 3.6 |
| Jun | 15° / 13° | 42 | 7.5 | 16 | 4.7 |
| Jul | 17° / 15° | 36 | 6.9 | 15.6 | 5.7 |
| Aug | 17° / 16° | 50 | 8.6 | 14.2 | 5.9 |
| Sep | 17° / 15° | 57 | 9.4 | 12.4 | 5.5 |
| Oct | 15° / 14° | 107 | 15 | 10.5 | 4.1 |
| Nov | 13° / 11° | 121 | 17.7 | 8.9 | 2.8 |
| Dec | 11° / 9° | 121 | 17 | 8 | 2.2 |
Cloud cover in April
The sky is clear or mostly clear about 32% of the time in April.
Beyond those clear spells, partly cloudy skies cover about 17% of April, with mostly cloudy or overcast conditions the remaining 51%.
| 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 (%) | 48 | 49 | 49 | 50 | 50 | 50 | 51 | 51 | 52 | 52 | 52 | 52 | 52 | 51 | 52 | 51 | 50 | 50 | 49 | 48 | 48 | 47 | 46 | 45 | 45 | 44 | 44 | 44 | 44 | 44 |
| Cloudier (%) | 52 | 51 | 51 | 50 | 50 | 50 | 49 | 49 | 48 | 48 | 48 | 48 | 48 | 49 | 48 | 49 | 50 | 50 | 51 | 52 | 52 | 53 | 54 | 55 | 55 | 56 | 56 | 56 | 56 | 56 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 48 | 52 |
| 2 | 49 | 51 |
| 3 | 49 | 51 |
| 4 | 50 | 50 |
| 5 | 50 | 50 |
| 6 | 50 | 50 |
| 7 | 51 | 49 |
| 8 | 51 | 49 |
| 9 | 52 | 48 |
| 10 | 52 | 48 |
| 11 | 52 | 48 |
| 12 | 52 | 48 |
| 13 | 52 | 48 |
| 14 | 51 | 49 |
| 15 | 52 | 48 |
| 16 | 51 | 49 |
| 17 | 50 | 50 |
| 18 | 50 | 50 |
| 19 | 49 | 51 |
| 20 | 48 | 52 |
| 21 | 48 | 52 |
| 22 | 47 | 53 |
| 23 | 46 | 54 |
| 24 | 45 | 55 |
| 25 | 45 | 55 |
| 26 | 44 | 56 |
| 27 | 44 | 56 |
| 28 | 44 | 56 |
| 29 | 44 | 56 |
| 30 | 44 | 56 |
Chance of precipitation in April
Saint Peter Port gets around 50 mm of rain over 9.7 wet days in April. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 31% and peaks near 35% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 35 | 34 | 34 | 33 | 32 | 32 | 31 | 31 | 30 | 30 | 30 | 29 | 29 | 29 | 30 | 30 | 30 | 31 | 31 | 32 | 32 | 33 | 33 | 33 | 32 | 32 | 31 | 31 | 30 | 30 |
| Rain chance (%) | |
|---|---|
| 1 | 35 |
| 2 | 34 |
| 3 | 34 |
| 4 | 33 |
| 5 | 32 |
| 6 | 32 |
| 7 | 31 |
| 8 | 31 |
| 9 | 30 |
| 10 | 30 |
| 11 | 30 |
| 12 | 29 |
| 13 | 29 |
| 14 | 29 |
| 15 | 30 |
| 16 | 30 |
| 17 | 30 |
| 18 | 31 |
| 19 | 31 |
| 20 | 32 |
| 21 | 32 |
| 22 | 33 |
| 23 | 33 |
| 24 | 33 |
| 25 | 32 |
| 26 | 32 |
| 27 | 31 |
| 28 | 31 |
| 29 | 30 |
| 30 | 30 |
Humidity in April
Most of April feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, April lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Dry (%) | |
|---|---|
| 1 | 100 |
| 2 | 100 |
| 3 | 100 |
| 4 | 100 |
| 5 | 100 |
| 6 | 100 |
| 7 | 100 |
| 8 | 100 |
| 9 | 100 |
| 10 | 100 |
| 11 | 100 |
| 12 | 100 |
| 13 | 100 |
| 14 | 100 |
| 15 | 100 |
| 16 | 100 |
| 17 | 100 |
| 18 | 100 |
| 19 | 100 |
| 20 | 100 |
| 21 | 100 |
| 22 | 100 |
| 23 | 100 |
| 24 | 100 |
| 25 | 100 |
| 26 | 100 |
| 27 | 100 |
| 28 | 100 |
| 29 | 100 |
| 30 | 100 |
Wind in April
Winds average 26 km/h in April.
Across April, daily wind ranges from about 25 km/h on the calmest days to 28 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) | 28 | 27 | 27 | 27 | 27 | 27 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
| Feels | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 28 | breezy |
| 2 | 27 | breezy |
| 3 | 27 | breezy |
| 4 | 27 | breezy |
| 5 | 27 | breezy |
| 6 | 27 | breezy |
| 7 | 26 | breezy |
| 8 | 26 | breezy |
| 9 | 26 | breezy |
| 10 | 26 | breezy |
| 11 | 26 | breezy |
| 12 | 26 | breezy |
| 13 | 25 | breezy |
| 14 | 25 | breezy |
| 15 | 25 | breezy |
| 16 | 25 | breezy |
| 17 | 25 | breezy |
| 18 | 25 | breezy |
| 19 | 25 | breezy |
| 20 | 25 | breezy |
| 21 | 25 | breezy |
| 22 | 25 | breezy |
| 23 | 25 | breezy |
| 24 | 25 | breezy |
| 25 | 25 | breezy |
| 26 | 25 | breezy |
| 27 | 25 | breezy |
| 28 | 25 | breezy |
| 29 | 25 | breezy |
| 30 | 25 | breezy |
Sunrise & sunset in April
Daylight runs from about 12 h 30 min at the start of April to 14 h 18 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 108 minutes over April. Sunrise moves from 5:58 AM to 4:59 AM, and sunset from 6:31 PM to 7:16 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) | 12.5 | 12.6 | 12.7 | 12.7 | 12.8 | 12.9 | 12.9 | 13.0 | 13.0 | 13.1 | 13.2 | 13.2 | 13.3 | 13.4 | 13.4 | 13.5 | 13.5 | 13.6 | 13.7 | 13.7 | 13.8 | 13.8 | 13.9 | 13.9 | 14.0 | 14.1 | 14.1 | 14.2 | 14.2 | 14.3 |
| Sunrise (AM) | 5:58 | 5:56 | 5:54 | 5:52 | 5:50 | 5:47 | 5:45 | 5:43 | 5:41 | 5:39 | 5:37 | 5:35 | 5:32 | 5:30 | 5:28 | 5:26 | 5:24 | 5:22 | 5:20 | 5:18 | 5:16 | 5:14 | 5:12 | 5:10 | 5:08 | 5:06 | 5:04 | 5:02 | 5:01 | 4:59 |
| Sunset (PM) | 6:31 | 6:33 | 6:34 | 6:36 | 6:38 | 6:39 | 6:41 | 6:42 | 6:44 | 6:45 | 6:47 | 6:48 | 6:50 | 6:52 | 6:53 | 6:55 | 6:56 | 6:58 | 6:59 | 7:01 | 7:02 | 7:04 | 7:05 | 7:07 | 7:09 | 7:10 | 7:12 | 7:13 | 7:15 | 7:16 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.5 | 5:58 | 6:31 |
| 2 | 12.6 | 5:56 | 6:33 |
| 3 | 12.7 | 5:54 | 6:34 |
| 4 | 12.7 | 5:52 | 6:36 |
| 5 | 12.8 | 5:50 | 6:38 |
| 6 | 12.9 | 5:47 | 6:39 |
| 7 | 12.9 | 5:45 | 6:41 |
| 8 | 13.0 | 5:43 | 6:42 |
| 9 | 13.0 | 5:41 | 6:44 |
| 10 | 13.1 | 5:39 | 6:45 |
| 11 | 13.2 | 5:37 | 6:47 |
| 12 | 13.2 | 5:35 | 6:48 |
| 13 | 13.3 | 5:32 | 6:50 |
| 14 | 13.4 | 5:30 | 6:52 |
| 15 | 13.4 | 5:28 | 6:53 |
| 16 | 13.5 | 5:26 | 6:55 |
| 17 | 13.5 | 5:24 | 6:56 |
| 18 | 13.6 | 5:22 | 6:58 |
| 19 | 13.7 | 5:20 | 6:59 |
| 20 | 13.7 | 5:18 | 7:01 |
| 21 | 13.8 | 5:16 | 7:02 |
| 22 | 13.8 | 5:14 | 7:04 |
| 23 | 13.9 | 5:12 | 7:05 |
| 24 | 13.9 | 5:10 | 7:07 |
| 25 | 14.0 | 5:08 | 7:09 |
| 26 | 14.1 | 5:06 | 7:10 |
| 27 | 14.1 | 5:04 | 7:12 |
| 28 | 14.2 | 5:02 | 7:13 |
| 29 | 14.2 | 5:01 | 7:15 |
| 30 | 14.3 | 4:59 | 7:16 |
Solar energy in April
Average shortwave solar energy reaching the ground each day in April, about 4.86 kWh/m².
For context, solar energy here swings from a low near 0.8 kWh/m² to a high of 6.39 kWh/m² in June across the year — April's 4.86 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 4.1 | 4.2 | 4.2 | 4.3 | 4.4 | 4.5 | 4.5 | 4.6 | 4.6 | 4.7 | 4.8 | 4.8 | 4.8 | 4.9 | 4.9 | 5.0 | 5.0 | 5.0 | 5.1 | 5.1 | 5.1 | 5.1 | 5.2 | 5.2 | 5.2 | 5.2 | 5.3 | 5.3 | 5.3 | 5.3 |
| 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 | 4.1 | Bright |
| 2 | 4.2 | Bright |
| 3 | 4.2 | Bright |
| 4 | 4.3 | Bright |
| 5 | 4.4 | Bright |
| 6 | 4.5 | Bright |
| 7 | 4.5 | Bright |
| 8 | 4.6 | Bright |
| 9 | 4.6 | Bright |
| 10 | 4.7 | Bright |
| 11 | 4.8 | Bright |
| 12 | 4.8 | Bright |
| 13 | 4.8 | Bright |
| 14 | 4.9 | Bright |
| 15 | 4.9 | Bright |
| 16 | 5.0 | Bright |
| 17 | 5.0 | Bright |
| 18 | 5.0 | Bright |
| 19 | 5.1 | Bright |
| 20 | 5.1 | Bright |
| 21 | 5.1 | Bright |
| 22 | 5.1 | Bright |
| 23 | 5.2 | Bright |
| 24 | 5.2 | Bright |
| 25 | 5.2 | Bright |
| 26 | 5.2 | Bright |
| 27 | 5.3 | Bright |
| 28 | 5.3 | Bright |
| 29 | 5.3 | Bright |
| 30 | 5.3 | Bright |
Hazard calendar for Saint Peter Port
None of Saint Peter Port's seasonal hazards are active in April. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
Saint Peter Port's rainy season runs September–March, when most of the year's rain falls.
Is April a good time to visit Saint Peter Port?
Our two travel scores rate April for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
April is a weaker month for outdoor sightseeing in Saint Peter Port.
What to pack for Saint Peter Port in April
From April's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In April, Saint Peter Port sees daytime highs around 11°C and nights near 9°C. Pack a warm layer. Worth having: rain gear, sun protection and a windbreaker. About 10 days see rain.
Sea temperature near Saint Peter Port in April
The nearest coast averages about 10°C in April — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in September at about 17°C and coldest in March near 9°C.
The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 10 | 10 | 9 | 10 | 12 | 14 | 16 | 17 | 17 | 16 | 14 | 12 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Cool | Cool | Cool | Bracing | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 10 | Bracing |
| Feb | 10 | Bracing |
| Mar | 9 | Bracing |
| Apr | 10 | Bracing |
| May | 12 | Bracing |
| Jun | 14 | Bracing |
| Jul | 16 | Cool |
| Aug | 17 | Cool |
| Sep | 17 | Cool |
| Oct | 16 | Cool |
| Nov | 14 | Bracing |
| Dec | 12 | Bracing |
UV index in Saint Peter Port in April
Clear-sky midday UV in April peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Saint Peter Port peaks around August 12 at about 6 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near January 1 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 6 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 1 | 3 | 5 | 6 | 6 | 6 | 7 | 5 | 3 | 1 | 1 |
| Level | Low | Low | Moderate | Moderate | High | High | High | High | Moderate | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 1 | Low |
| Mar | 3 | Moderate |
| Apr | 5 | Moderate |
| May | 6 | High |
| Jun | 6 | High |
| Jul | 6 | High |
| Aug | 7 | High |
| Sep | 5 | Moderate |
| Oct | 3 | Moderate |
| Nov | 1 | Low |
| Dec | 1 | Low |
Where is Saint Peter Port?
Saint Peter Port sits at 49.5°N, 2.5°W, 10 m above sea level, in Guernsey. The nearest listed city is Saint Helier, 43 km away.
Topography around Saint Peter Port
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Saint Peter Port.
Within 3 km, the terrain around Saint Peter Port has only modest variations in elevation — a maximum elevation change of 105 m around an average of 24 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 108 m; within 80 km, only modest variations in elevation — a maximum elevation change of 191 m.
The land around Saint Peter Port is covered by water (41%) and trees (25%) within 3 km, water (91%) within 16 km, and water (88%) within 80 km.
Guernsey travel facts
- Power plugs
- Type G
- 230 V · 50 Hz
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 Saint Peter Port (49.4598°, -2.5353°, elevation 10 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).