Río Grande weather in May
In May, Río Grande sees average daytime highs of 30°C and overnight lows near 15°C, with 15 mm of rain across 3.2 wet days and about 13.1 hours of daylight. It is the 1st-warmest and 6th-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 55% of the time in May, and the air most often feels dry.
Daylight stretches from about 12 h 54 min at the start of May to 13 h 18 min by month's end. Set against the rest of the year, May is Río Grande's 4th-clearest and 4th-windiest month. For the whole year in context, see Río Grande's year-round climate.
- Daytime high
- 30°
- 1st warmest
- Overnight low
- 15°
- 9th coldest
- Rainfall
- 15 mm
- 3.2 wet days
- Daylight
- 13 h 06 min
- 6:14 AM – 7:23 PM
- Cloud cover
- 39%
- 4th clearest
- Wind
- 12 km/h
- 4th windiest
- Solar energy
- 7.81 kWh/m²
- Travel score
- 6.2
- out of 10
Río Grande is Mexican town in the state of Zacatecas.
- Founded
- 1562
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in May
Day-to-day highs hold fairly steady near 30°C through the month.
A typical May day in Río Grande reaches about 30°C in the afternoon and slips back to 15°C overnight — a 15°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 33°C. Set against its neighbours, May runs about 2°C warmer than April and about 1°C warmer 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) | 29 | 29 | 29 | 29 | 29 | 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) | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 29 | 14 |
| 2 | 29 | 14 |
| 3 | 29 | 14 |
| 4 | 29 | 14 |
| 5 | 29 | 14 |
| 6 | 30 | 14 |
| 7 | 30 | 14 |
| 8 | 30 | 14 |
| 9 | 30 | 14 |
| 10 | 30 | 14 |
| 11 | 30 | 14 |
| 12 | 30 | 15 |
| 13 | 30 | 15 |
| 14 | 30 | 15 |
| 15 | 30 | 15 |
| 16 | 30 | 15 |
| 17 | 30 | 15 |
| 18 | 30 | 15 |
| 19 | 30 | 15 |
| 20 | 30 | 15 |
| 21 | 30 | 15 |
| 22 | 30 | 15 |
| 23 | 30 | 16 |
| 24 | 30 | 16 |
| 25 | 30 | 16 |
| 26 | 30 | 16 |
| 27 | 30 | 16 |
| 28 | 30 | 16 |
| 29 | 30 | 16 |
| 30 | 30 | 16 |
| 31 | 30 | 16 |
Río Grande weather by month
How May compares with the rest of the year at a glance. May is the 1st-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 | 20° / 5° | 13 | 2.4 | 10.7 | 7.8 |
| Feb | 23° / 7° | 11 | 1.6 | 11.2 | 8.5 |
| Mar | 25° / 9° | 8 | 1.4 | 11.8 | 8.5 |
| Apr | 28° / 12° | 7 | 1.6 | 12.5 | 7.4 |
| May | 30° / 15° | 15 | 3.2 | 13.1 | 6.2 |
| Jun | 29° / 16° | 56 | 8.5 | 13.4 | 6.0 |
| Jul | 27° / 16° | 78 | 11.2 | 13.3 | 6.4 |
| Aug | 27° / 16° | 70 | 10.9 | 12.8 | 6.5 |
| Sep | 25° / 15° | 86 | 11.8 | 12.1 | 6.6 |
| Oct | 25° / 12° | 28 | 4.8 | 11.4 | 8.1 |
| Nov | 23° / 8° | 11 | 2.2 | 10.8 | 8.5 |
| Dec | 21° / 6° | 8 | 1.8 | 10.6 | 8.0 |
Cloud cover in May
The sky is clear or mostly clear about 55% of the time in May.
Beyond those clear spells, partly cloudy skies cover about 25% of May, with mostly cloudy or overcast conditions the remaining 20%. 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 (%) | 73 | 73 | 74 | 74 | 74 | 75 | 75 | 77 | 77 | 77 | 78 | 78 | 79 | 80 | 81 | 81 | 82 | 82 | 82 | 83 | 83 | 84 | 84 | 84 | 85 | 85 | 85 | 84 | 84 | 84 | 84 |
| Cloudier (%) | 27 | 27 | 26 | 26 | 26 | 25 | 25 | 23 | 23 | 23 | 22 | 22 | 21 | 20 | 19 | 19 | 18 | 18 | 18 | 17 | 17 | 16 | 16 | 16 | 15 | 15 | 15 | 16 | 16 | 16 | 16 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 73 | 27 |
| 2 | 73 | 27 |
| 3 | 74 | 26 |
| 4 | 74 | 26 |
| 5 | 74 | 26 |
| 6 | 75 | 25 |
| 7 | 75 | 25 |
| 8 | 77 | 23 |
| 9 | 77 | 23 |
| 10 | 77 | 23 |
| 11 | 78 | 22 |
| 12 | 78 | 22 |
| 13 | 79 | 21 |
| 14 | 80 | 20 |
| 15 | 81 | 19 |
| 16 | 81 | 19 |
| 17 | 82 | 18 |
| 18 | 82 | 18 |
| 19 | 82 | 18 |
| 20 | 83 | 17 |
| 21 | 83 | 17 |
| 22 | 84 | 16 |
| 23 | 84 | 16 |
| 24 | 84 | 16 |
| 25 | 85 | 15 |
| 26 | 85 | 15 |
| 27 | 85 | 15 |
| 28 | 84 | 16 |
| 29 | 84 | 16 |
| 30 | 84 | 16 |
| 31 | 84 | 16 |
Chance of precipitation in May
Río Grande gets around 15 mm of rain over 3.2 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 11% and peaks near 16% 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 (%) | 7 | 7 | 8 | 8 | 8 | 9 | 9 | 10 | 10 | 10 | 10 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 14 | 15 | 16 |
| Rain chance (%) | |
|---|---|
| 1 | 7 |
| 2 | 7 |
| 3 | 8 |
| 4 | 8 |
| 5 | 8 |
| 6 | 9 |
| 7 | 9 |
| 8 | 10 |
| 9 | 10 |
| 10 | 10 |
| 11 | 10 |
| 12 | 11 |
| 13 | 11 |
| 14 | 11 |
| 15 | 11 |
| 16 | 11 |
| 17 | 11 |
| 18 | 11 |
| 19 | 11 |
| 20 | 11 |
| 21 | 11 |
| 22 | 12 |
| 23 | 12 |
| 24 | 12 |
| 25 | 12 |
| 26 | 12 |
| 27 | 13 |
| 28 | 13 |
| 29 | 14 |
| 30 | 15 |
| 31 | 16 |
Humidity in May
Most of May feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, May lands in the dry band about 98% 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 98 | 98 | 98 | 97 | 97 | 96 | 95 | 95 | 94 | 93 |
| Comfortable (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 3 | 3 | 4 | 5 | 5 | 6 | 7 |
| Dry (%) | Comfortable (%) | |
|---|---|---|
| 1 | 100 | 0 |
| 2 | 100 | 0 |
| 3 | 100 | 0 |
| 4 | 100 | 0 |
| 5 | 100 | 0 |
| 6 | 100 | 0 |
| 7 | 100 | 0 |
| 8 | 100 | 0 |
| 9 | 100 | 0 |
| 10 | 100 | 0 |
| 11 | 100 | 0 |
| 12 | 100 | 0 |
| 13 | 100 | 0 |
| 14 | 100 | 0 |
| 15 | 99 | 1 |
| 16 | 99 | 1 |
| 17 | 99 | 1 |
| 18 | 99 | 1 |
| 19 | 99 | 1 |
| 20 | 99 | 1 |
| 21 | 99 | 1 |
| 22 | 98 | 2 |
| 23 | 98 | 2 |
| 24 | 98 | 2 |
| 25 | 97 | 3 |
| 26 | 97 | 3 |
| 27 | 96 | 4 |
| 28 | 95 | 5 |
| 29 | 95 | 5 |
| 30 | 94 | 6 |
| 31 | 93 | 7 |
Wind in May
Winds average 12 km/h in May.
Across May, daily wind ranges from about 11 km/h on the calmest days to 13 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) | 13 | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 11 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | 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 | 13 | light breeze |
| 2 | 13 | light breeze |
| 3 | 12 | light breeze |
| 4 | 12 | light breeze |
| 5 | 12 | light breeze |
| 6 | 12 | light breeze |
| 7 | 12 | light breeze |
| 8 | 12 | light breeze |
| 9 | 12 | light breeze |
| 10 | 12 | light breeze |
| 11 | 12 | light breeze |
| 12 | 12 | light breeze |
| 13 | 12 | calm |
| 14 | 12 | calm |
| 15 | 12 | calm |
| 16 | 12 | calm |
| 17 | 12 | calm |
| 18 | 12 | calm |
| 19 | 12 | calm |
| 20 | 12 | calm |
| 21 | 12 | calm |
| 22 | 12 | calm |
| 23 | 12 | calm |
| 24 | 12 | calm |
| 25 | 12 | calm |
| 26 | 11 | calm |
| 27 | 11 | calm |
| 28 | 11 | calm |
| 29 | 11 | calm |
| 30 | 11 | calm |
| 31 | 11 | calm |
Sunrise & sunset in May
Daylight runs from about 12 h 54 min at the start of May to 13 h 18 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 24 minutes over May. Sunrise moves from 6:23 AM to 6:09 AM, and sunset from 7:16 PM to 7:30 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 | 12.9 | 12.9 | 13.0 | 13.0 | 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 | 13.2 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 |
| Sunrise (AM) | 6:23 | 6:22 | 6:22 | 6:21 | 6:20 | 6:20 | 6:19 | 6:18 | 6:18 | 6:17 | 6:17 | 6:16 | 6:15 | 6:15 | 6:14 | 6:14 | 6:13 | 6:13 | 6:13 | 6:12 | 6:12 | 6:11 | 6:11 | 6:11 | 6:10 | 6:10 | 6:10 | 6:10 | 6:09 | 6:09 | 6:09 |
| Sunset (PM) | 7:16 | 7:16 | 7:17 | 7:17 | 7:17 | 7:18 | 7:18 | 7:19 | 7:19 | 7:20 | 7:20 | 7:21 | 7:21 | 7:22 | 7:22 | 7:23 | 7:23 | 7:24 | 7:24 | 7:25 | 7:25 | 7:26 | 7:26 | 7:27 | 7:27 | 7:28 | 7:28 | 7:29 | 7:29 | 7:30 | 7:30 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.9 | 6:23 | 7:16 |
| 2 | 12.9 | 6:22 | 7:16 |
| 3 | 12.9 | 6:22 | 7:17 |
| 4 | 12.9 | 6:21 | 7:17 |
| 5 | 13.0 | 6:20 | 7:17 |
| 6 | 13.0 | 6:20 | 7:18 |
| 7 | 13.0 | 6:19 | 7:18 |
| 8 | 13.0 | 6:18 | 7:19 |
| 9 | 13.0 | 6:18 | 7:19 |
| 10 | 13.0 | 6:17 | 7:20 |
| 11 | 13.1 | 6:17 | 7:20 |
| 12 | 13.1 | 6:16 | 7:21 |
| 13 | 13.1 | 6:15 | 7:21 |
| 14 | 13.1 | 6:15 | 7:22 |
| 15 | 13.1 | 6:14 | 7:22 |
| 16 | 13.1 | 6:14 | 7:23 |
| 17 | 13.2 | 6:13 | 7:23 |
| 18 | 13.2 | 6:13 | 7:24 |
| 19 | 13.2 | 6:13 | 7:24 |
| 20 | 13.2 | 6:12 | 7:25 |
| 21 | 13.2 | 6:12 | 7:25 |
| 22 | 13.2 | 6:11 | 7:26 |
| 23 | 13.3 | 6:11 | 7:26 |
| 24 | 13.3 | 6:11 | 7:27 |
| 25 | 13.3 | 6:10 | 7:27 |
| 26 | 13.3 | 6:10 | 7:28 |
| 27 | 13.3 | 6:10 | 7:28 |
| 28 | 13.3 | 6:10 | 7:29 |
| 29 | 13.3 | 6:09 | 7:29 |
| 30 | 13.3 | 6:09 | 7:30 |
| 31 | 13.3 | 6:09 | 7:30 |
Solar energy in May
Average shortwave solar energy reaching the ground each day in May, about 7.81 kWh/m² — the sunniest month for solar.
For context, solar energy here swings from a low near 4.54 kWh/m² to a high of 7.81 kWh/m² in May across the year — May's 7.81 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) | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.7 | 7.7 | 7.7 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 7.8 | Intense |
| 2 | 7.8 | Intense |
| 3 | 7.8 | Intense |
| 4 | 7.8 | Intense |
| 5 | 7.8 | Intense |
| 6 | 7.8 | Intense |
| 7 | 7.8 | Intense |
| 8 | 7.8 | Intense |
| 9 | 7.8 | Intense |
| 10 | 7.8 | Intense |
| 11 | 7.8 | Intense |
| 12 | 7.8 | Intense |
| 13 | 7.8 | Intense |
| 14 | 7.8 | Intense |
| 15 | 7.8 | Intense |
| 16 | 7.8 | Intense |
| 17 | 7.8 | Intense |
| 18 | 7.8 | Intense |
| 19 | 7.8 | Intense |
| 20 | 7.8 | Intense |
| 21 | 7.8 | Intense |
| 22 | 7.8 | Intense |
| 23 | 7.8 | Intense |
| 24 | 7.8 | Intense |
| 25 | 7.8 | Intense |
| 26 | 7.8 | Intense |
| 27 | 7.8 | Intense |
| 28 | 7.8 | Intense |
| 29 | 7.7 | Intense |
| 30 | 7.7 | Intense |
| 31 | 7.7 | Intense |
Is May a good time to visit Río Grande?
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 Río Grande for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Río Grande in May
From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In May, Río Grande sees daytime highs around 30°C and nights near 15°C. Pack light clothes and sun protection. About 3 days see rain.
UV index in Río Grande in May
Clear-sky midday UV in May peaks around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Río Grande peaks around May 21 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 6 (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) | 7 | 10 | 11 | 13 | 14 | 14 | 13 | 13 | 12 | 10 | 7 | 6 |
| Level | High | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high | High |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 7 | High |
| Feb | 10 | Very high |
| Mar | 11 | Extreme |
| Apr | 13 | Extreme |
| May | 14 | Extreme |
| Jun | 14 | Extreme |
| Jul | 13 | Extreme |
| Aug | 13 | Extreme |
| Sep | 12 | Extreme |
| Oct | 10 | Very high |
| Nov | 7 | Very high |
| Dec | 6 | High |
Where is Río Grande?
Río Grande sits at 23.8°N, 103.0°W, 1,859 m above sea level, in Mexico. The nearest listed city is Juan Aldama, 63 km away.
Topography around Río Grande
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Río Grande.
Within 3 km, the terrain around Río Grande has only modest variations in elevation — a maximum elevation change of 96 m around an average of 1,878 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 396 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,533 m.
The land around Río Grande is covered by shrubs (40%), artificial surfaces (30%) and cropland (20%) within 3 km, shrubs (77%) within 16 km, and shrubs (64%) and cropland (30%) within 80 km.
Mexico travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type A / B
- 120 / 127 V · 60 Hz
- Prices
- ≈ 54% of US
- price level, 2025
- GDP per capita
- $13,889
- 2025
- Happiness
- 7.0 / 10
- World Happiness, 2025
- Safe drinking water
- 43%
- of population, 2024
- Homicide rate
- 24.9
- per 100k, 2023
- Road deaths
- 12.8
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Very low
- EF EPI 440
- 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 Río Grande (23.8273°, -103.0341°, elevation 1,859 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. 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).