Aldan weather in February
In February, Aldan sees average daytime highs of -21°C and overnight lows near -29°C, with 10 mm of precipitation across 3.7 wet days and about 8.8 hours of daylight. It is the 10th-warmest and 12th-wettest month of the year here.
Highs climb over the month, from about -24°C in the first days to -18°C by the end. The sky is clear or mostly clear about 14% of the time in February, and the air most often feels dry.
Daylight stretches from about 7 h 48 min at the start of February to 10 hours by month's end. Set against the rest of the year, February is Aldan's 9th-clearest and 9th-windiest month. For the whole year in context, see Aldan's year-round climate.
- Daytime high
- -21°
- 10th warmest
- Overnight low
- -29°
- 3rd coldest
- Precipitation
- 10 mm
- 3.7 wet days
- Daylight
- 8 h 54 min
- 8:27 AM – 5:19 PM
- Cloud cover
- 79%
- 9th clearest
- Wind
- 9 km/h
- 9th windiest
- Solar energy
- 1.47 kWh/m²
- Travel score
- 0.0
- out of 10
Aldan is city in Sakha Republic.
- Density
- 740/km²
- people per km²
- Founded
- 1924
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in February
Highs climb over the month, from about -24°C in the first days to -18°C by the end.
A typical February day in Aldan reaches about -21°C in the afternoon and slips back to -29°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between -29°C and -14°C. Set against its neighbours, February runs about 5°C warmer than January and about 10°C cooler than March.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | -24 | -24 | -24 | -24 | -24 | -24 | -23 | -23 | -23 | -23 | -23 | -22 | -22 | -22 | -22 | -21 | -21 | -21 | -20 | -20 | -20 | -19 | -19 | -19 | -18 | -18 | -18 | -17 |
| Avg low (°C) | -31 | -31 | -31 | -31 | -31 | -30 | -30 | -30 | -30 | -30 | -30 | -30 | -30 | -29 | -29 | -29 | -29 | -29 | -28 | -28 | -28 | -27 | -27 | -27 | -27 | -26 | -26 | -26 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | -24 | -31 |
| 2 | -24 | -31 |
| 3 | -24 | -31 |
| 4 | -24 | -31 |
| 5 | -24 | -31 |
| 6 | -24 | -30 |
| 7 | -23 | -30 |
| 8 | -23 | -30 |
| 9 | -23 | -30 |
| 10 | -23 | -30 |
| 11 | -23 | -30 |
| 12 | -22 | -30 |
| 13 | -22 | -30 |
| 14 | -22 | -29 |
| 15 | -22 | -29 |
| 16 | -21 | -29 |
| 17 | -21 | -29 |
| 18 | -21 | -29 |
| 19 | -20 | -28 |
| 20 | -20 | -28 |
| 21 | -20 | -28 |
| 22 | -19 | -27 |
| 23 | -19 | -27 |
| 24 | -19 | -27 |
| 25 | -18 | -27 |
| 26 | -18 | -26 |
| 27 | -18 | -26 |
| 28 | -17 | -26 |
How February really feels in Aldan
Once humidity and wind are folded in, February averages 0 days that feel above 32°C and 28 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
The story in February is cold — wind chill drags the overnight "feels like" below the raw low.
Aldan weather by month
How February compares with the rest of the year at a glance. February is the 10th-warmest and 12th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | -26° / -32° | 10 | 3.6 | 7.2 | 6.8 | 0.0 |
| Feb | -21° / -29° | 10 | 3.7 | 6.9 | 8.8 | 0.0 |
| Mar | -12° / -21° | 19 | 6.7 | 10.5 | 11.4 | 0.0 |
| Apr | -1° / -10° | 38 | 9.6 | 10.9 | 14 | 0.0 |
| May | 9° / -1° | 85 | 14.6 | 7.7 | 16.5 | 1.6 |
| Jun | 18° / 7° | 97 | 13.9 | 0.8 | 17.9 | 5.1 |
| Jul | 21° / 11° | 137 | 15.7 | 0 | 17.3 | 5.5 |
| Aug | 18° / 8° | 121 | 15.5 | 0.4 | 15.2 | 4.8 |
| Sep | 9° / 0° | 100 | 14.8 | 6.5 | 12.5 | 1.4 |
| Oct | -4° / -11° | 58 | 12.8 | 15.5 | 9.9 | 0.0 |
| Nov | -18° / -24° | 27 | 7.6 | 11.4 | 7.5 | 0.0 |
| Dec | -26° / -32° | 12 | 4.5 | 8.7 | 6.1 | 0.0 |
Cloud cover in February
The sky is clear or mostly clear about 14% of the time in February.
Beyond those clear spells, partly cloudy skies cover about 9% of February, with mostly cloudy or overcast conditions the remaining 77%. 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 18 | 18 | 19 | 19 | 19 | 19 | 19 | 20 | 21 | 21 | 22 | 22 | 22 | 23 | 23 | 23 | 24 | 24 | 24 | 25 | 25 | 24 | 25 | 25 | 25 | 26 | 26 | 26 |
| Cloudier (%) | 82 | 82 | 81 | 81 | 81 | 81 | 81 | 80 | 79 | 79 | 78 | 78 | 78 | 77 | 77 | 77 | 76 | 76 | 76 | 75 | 75 | 76 | 75 | 75 | 75 | 74 | 74 | 74 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 18 | 82 |
| 2 | 18 | 82 |
| 3 | 19 | 81 |
| 4 | 19 | 81 |
| 5 | 19 | 81 |
| 6 | 19 | 81 |
| 7 | 19 | 81 |
| 8 | 20 | 80 |
| 9 | 21 | 79 |
| 10 | 21 | 79 |
| 11 | 22 | 78 |
| 12 | 22 | 78 |
| 13 | 22 | 78 |
| 14 | 23 | 77 |
| 15 | 23 | 77 |
| 16 | 23 | 77 |
| 17 | 24 | 76 |
| 18 | 24 | 76 |
| 19 | 24 | 76 |
| 20 | 25 | 75 |
| 21 | 25 | 75 |
| 22 | 24 | 76 |
| 23 | 25 | 75 |
| 24 | 25 | 75 |
| 25 | 25 | 75 |
| 26 | 26 | 74 |
| 27 | 26 | 74 |
| 28 | 26 | 74 |
Chance of precipitation in February
Aldan gets around 10 mm of rain and snow over 3.7 wet days in February, the driest month. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable precipitation averages around 13% and peaks near 16% on the wettest days, and about 7 days bring snow.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 11 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 14 | 14 | 14 | 15 | 15 | 15 | 16 | 16 |
| Snow chance (%) | 24 | 24 | 24 | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 24 | 24 | 25 | 25 | 25 | 26 | 26 | 27 | 28 |
| Rain chance (%) | Snow chance (%) | |
|---|---|---|
| 1 | 12 | 24 |
| 2 | 12 | 24 |
| 3 | 12 | 24 |
| 4 | 12 | 24 |
| 5 | 12 | 24 |
| 6 | 12 | 23 |
| 7 | 12 | 23 |
| 8 | 11 | 23 |
| 9 | 11 | 23 |
| 10 | 11 | 23 |
| 11 | 11 | 23 |
| 12 | 11 | 23 |
| 13 | 11 | 23 |
| 14 | 12 | 23 |
| 15 | 12 | 23 |
| 16 | 12 | 23 |
| 17 | 12 | 24 |
| 18 | 13 | 24 |
| 19 | 13 | 24 |
| 20 | 13 | 24 |
| 21 | 14 | 24 |
| 22 | 14 | 25 |
| 23 | 14 | 25 |
| 24 | 15 | 25 |
| 25 | 15 | 26 |
| 26 | 15 | 26 |
| 27 | 16 | 27 |
| 28 | 16 | 28 |
Humidity in February
Most of February feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, February 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 |
| 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 |
Wind in February
Winds average 9 km/h in February.
Across February, daily wind ranges from about 9 km/h on the calmest days to 9 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 |
| 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 |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 9 | calm |
| 2 | 9 | calm |
| 3 | 9 | calm |
| 4 | 9 | calm |
| 5 | 9 | calm |
| 6 | 9 | calm |
| 7 | 9 | calm |
| 8 | 9 | calm |
| 9 | 9 | calm |
| 10 | 9 | calm |
| 11 | 9 | calm |
| 12 | 9 | calm |
| 13 | 9 | calm |
| 14 | 9 | calm |
| 15 | 9 | calm |
| 16 | 9 | calm |
| 17 | 9 | calm |
| 18 | 9 | calm |
| 19 | 9 | calm |
| 20 | 9 | calm |
| 21 | 9 | calm |
| 22 | 9 | calm |
| 23 | 9 | calm |
| 24 | 9 | calm |
| 25 | 9 | calm |
| 26 | 9 | calm |
| 27 | 9 | calm |
| 28 | 9 | calm |
Sunrise & sunset in February
Daylight runs from about 7 h 48 min at the start of February to 10 hours by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 132 minutes over February. Sunrise moves from 8:59 AM to 7:53 AM, and sunset from 4:45 PM to 5:51 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 7.8 | 7.8 | 7.9 | 8.0 | 8.1 | 8.1 | 8.2 | 8.3 | 8.4 | 8.5 | 8.5 | 8.6 | 8.7 | 8.8 | 8.9 | 8.9 | 9.0 | 9.1 | 9.2 | 9.3 | 9.4 | 9.4 | 9.5 | 9.6 | 9.7 | 9.8 | 9.9 | 10.0 |
| Sunrise (AM) | 8:59 | 8:57 | 8:55 | 8:53 | 8:51 | 8:49 | 8:46 | 8:44 | 8:42 | 8:39 | 8:37 | 8:35 | 8:32 | 8:30 | 8:27 | 8:25 | 8:22 | 8:20 | 8:17 | 8:14 | 8:12 | 8:09 | 8:06 | 8:04 | 8:01 | 7:58 | 7:56 | 7:53 |
| Sunset (PM) | 4:45 | 4:47 | 4:49 | 4:52 | 4:54 | 4:57 | 4:59 | 5:02 | 5:04 | 5:06 | 5:09 | 5:11 | 5:14 | 5:16 | 5:19 | 5:21 | 5:24 | 5:26 | 5:29 | 5:31 | 5:34 | 5:36 | 5:39 | 5:41 | 5:43 | 5:46 | 5:48 | 5:51 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 7.8 | 8:59 | 4:45 |
| 2 | 7.8 | 8:57 | 4:47 |
| 3 | 7.9 | 8:55 | 4:49 |
| 4 | 8.0 | 8:53 | 4:52 |
| 5 | 8.1 | 8:51 | 4:54 |
| 6 | 8.1 | 8:49 | 4:57 |
| 7 | 8.2 | 8:46 | 4:59 |
| 8 | 8.3 | 8:44 | 5:02 |
| 9 | 8.4 | 8:42 | 5:04 |
| 10 | 8.5 | 8:39 | 5:06 |
| 11 | 8.5 | 8:37 | 5:09 |
| 12 | 8.6 | 8:35 | 5:11 |
| 13 | 8.7 | 8:32 | 5:14 |
| 14 | 8.8 | 8:30 | 5:16 |
| 15 | 8.9 | 8:27 | 5:19 |
| 16 | 8.9 | 8:25 | 5:21 |
| 17 | 9.0 | 8:22 | 5:24 |
| 18 | 9.1 | 8:20 | 5:26 |
| 19 | 9.2 | 8:17 | 5:29 |
| 20 | 9.3 | 8:14 | 5:31 |
| 21 | 9.4 | 8:12 | 5:34 |
| 22 | 9.4 | 8:09 | 5:36 |
| 23 | 9.5 | 8:06 | 5:39 |
| 24 | 9.6 | 8:04 | 5:41 |
| 25 | 9.7 | 8:01 | 5:43 |
| 26 | 9.8 | 7:58 | 5:46 |
| 27 | 9.9 | 7:56 | 5:48 |
| 28 | 10.0 | 7:53 | 5:51 |
Solar energy in February
Average shortwave solar energy reaching the ground each day in February, about 1.47 kWh/m².
For context, solar energy here swings from a low near 0.36 kWh/m² to a high of 5.79 kWh/m² in June across the year — February's 1.47 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 0.9 | 1.0 | 1.0 | 1.0 | 1.1 | 1.1 | 1.1 | 1.2 | 1.2 | 1.3 | 1.3 | 1.4 | 1.4 | 1.4 | 1.5 | 1.5 | 1.6 | 1.6 | 1.7 | 1.7 | 1.8 | 1.8 | 1.9 | 1.9 | 2.0 | 2.0 | 2.1 | 2.1 |
| Level | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Moderate | Moderate | Moderate |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 0.9 | Dim |
| 2 | 1.0 | Dim |
| 3 | 1.0 | Dim |
| 4 | 1.0 | Dim |
| 5 | 1.1 | Dim |
| 6 | 1.1 | Dim |
| 7 | 1.1 | Dim |
| 8 | 1.2 | Dim |
| 9 | 1.2 | Dim |
| 10 | 1.3 | Dim |
| 11 | 1.3 | Dim |
| 12 | 1.4 | Dim |
| 13 | 1.4 | Dim |
| 14 | 1.4 | Dim |
| 15 | 1.5 | Dim |
| 16 | 1.5 | Dim |
| 17 | 1.6 | Dim |
| 18 | 1.6 | Dim |
| 19 | 1.7 | Dim |
| 20 | 1.7 | Dim |
| 21 | 1.8 | Dim |
| 22 | 1.8 | Dim |
| 23 | 1.9 | Dim |
| 24 | 1.9 | Dim |
| 25 | 2.0 | Dim |
| 26 | 2.0 | Moderate |
| 27 | 2.1 | Moderate |
| 28 | 2.1 | Moderate |
Hazard calendar for Aldan
None of Aldan's seasonal hazards are active in February. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
Aldan's rainy season runs May–September, when most of the year's rain falls.
Is February a good time to visit Aldan?
Our two travel scores rate February for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
February is a weaker month for outdoor sightseeing in Aldan.
What to pack for Aldan in February
From February's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In February, Aldan sees daytime highs around -21°C and nights near -29°C. Pack a warm layer and a heavy coat. About 4 days see rain.
UV index in Aldan in February
Clear-sky midday UV in February peaks around 1. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Aldan peaks around June 10 at about 5 (moderate) — a little sun protection helps at midday. It bottoms out near January 1 at about 0 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 4 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 0 | 1 | 1 | 3 | 4 | 5 | 2 | 5 | 3 | 1 | 0 | 0 |
| Level | Low | Low | Low | Moderate | Moderate | Moderate | Low | Moderate | Moderate | Low | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 0 | Low |
| Feb | 1 | Low |
| Mar | 1 | Low |
| Apr | 3 | Moderate |
| May | 4 | Moderate |
| Jun | 5 | Moderate |
| Jul | 2 | Low |
| Aug | 5 | Moderate |
| Sep | 3 | Moderate |
| Oct | 1 | Low |
| Nov | 0 | Low |
| Dec | 0 | Low |
Air quality in Aldan in February
Average fine-particle pollution (PM2.5) through the year — so you can see where February falls, not just the annual average.
Air quality in Aldan is worst in July — around 27 µg/m³ PM2.5 (moderate), about 26.9× the cleanest month (December, 1 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) | 2 | 2 | 5 | 6 | 8 | 9 | 27 | 20 | 10 | 4 | 2 | 1 |
| Level | Good | Good | Good | Good | Good | Good | Moderate | Moderate | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 2 | Good |
| Feb | 2 | Good |
| Mar | 5 | Good |
| Apr | 6 | Good |
| May | 8 | Good |
| Jun | 9 | Good |
| Jul | 27 | Moderate |
| Aug | 20 | Moderate |
| Sep | 10 | Good |
| Oct | 4 | Good |
| Nov | 2 | Good |
| Dec | 1 | Good |
Where is Aldan?
Aldan sits at 58.6°N, 125.4°E, 698 m above sea level, in Russia. The nearest listed city is Neryungri, 221 km away.
Topography around Aldan
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Aldan.
Within 3 km, the terrain around Aldan has only modest variations in elevation — a maximum elevation change of 201 m around an average of 683 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 857 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,334 m.
The land around Aldan is covered by trees (77%) within 3 km, trees (95%) within 16 km, and trees (91%) within 80 km.
Russia travel facts
- Travel advisory
- Level 4
- Do Not Travel
- Power plugs
- Type C / F
- 230 V · 50 Hz
- Prices
- ≈ 32% of US
- price level, 2025
- GDP per capita
- $17,547
- 2025
- Happiness
- 5.8 / 10
- World Happiness, 2025
- Safe drinking water
- 76%
- of population, 2024
- Homicide rate
- 6.8
- per 100k, 2021
- Road deaths
- 12
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Moderate
- EF EPI 521
- 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 Aldan (58.6123°, 125.4°, elevation 698 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. 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).