Gorno-Altaysk weather in April
In April, Gorno-Altaysk sees average daytime highs of 11°C and overnight lows near -1°C, with 70 mm of precipitation across 11.9 wet days and about 13.6 hours of daylight. It is the 6th-warmest and 6th-wettest month of the year here.
Highs climb over the month, from about 7°C in the first days to 15°C by the end. The sky is clear or mostly clear about 24% of the time in April, and the air most often feels dry.
Daylight stretches from about 12 h 36 min at the start of April to 14 h 30 min by month's end. Set against the rest of the year, April is Gorno-Altaysk's 7th-clearest and 2nd-windiest month. For the whole year in context, see Gorno-Altaysk's year-round climate.
- Daytime high
- 11°
- 6th warmest
- Overnight low
- -1°
- 6th coldest
- Precipitation
- 70 mm
- 11.9 wet days
- Daylight
- 13 h 36 min
- 5:28 AM – 7:05 PM
- Cloud cover
- 65%
- 7th clearest
- Wind
- 8 km/h
- 2nd windiest
- Solar energy
- 4.69 kWh/m²
- Travel score
- 2.6
- out of 10
Gorno-Altaysk is city in eastern Russia.
- Density
- 658/km²
- people per km²
- Founded
- 1830
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in April
Highs climb over the month, from about 7°C in the first days to 15°C by the end.
A typical April day in Gorno-Altaysk reaches about 11°C in the afternoon and slips back to -1°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 3°C and 20°C. Set against its neighbours, April runs about 10°C warmer than March and about 7°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) | 6 | 7 | 7 | 7 | 8 | 8 | 8 | 9 | 9 | 9 | 10 | 10 | 10 | 11 | 11 | 11 | 12 | 12 | 12 | 13 | 13 | 13 | 14 | 14 | 14 | 14 | 14 | 15 | 15 | 15 |
| Avg low (°C) | -5 | -5 | -5 | -5 | -4 | -4 | -4 | -3 | -3 | -3 | -3 | -2 | -2 | -2 | -1 | -1 | -1 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 6 | -5 |
| 2 | 7 | -5 |
| 3 | 7 | -5 |
| 4 | 7 | -5 |
| 5 | 8 | -4 |
| 6 | 8 | -4 |
| 7 | 8 | -4 |
| 8 | 9 | -3 |
| 9 | 9 | -3 |
| 10 | 9 | -3 |
| 11 | 10 | -3 |
| 12 | 10 | -2 |
| 13 | 10 | -2 |
| 14 | 11 | -2 |
| 15 | 11 | -1 |
| 16 | 11 | -1 |
| 17 | 12 | -1 |
| 18 | 12 | 0 |
| 19 | 12 | 0 |
| 20 | 13 | 0 |
| 21 | 13 | 0 |
| 22 | 13 | 1 |
| 23 | 14 | 1 |
| 24 | 14 | 1 |
| 25 | 14 | 1 |
| 26 | 14 | 2 |
| 27 | 14 | 2 |
| 28 | 15 | 2 |
| 29 | 15 | 2 |
| 30 | 15 | 2 |
How April really feels in Gorno-Altaysk
Once humidity and wind are folded in, April averages 0 days that feel above 32°C and 30 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
The story in April is cold — wind chill drags the overnight "feels like" below the raw low.
Gorno-Altaysk weather by month
How April compares with the rest of the year at a glance. April is the 6th-warmest and 6th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | -9° / -20° | 23 | 6.7 | 8.2 | 8.1 | 0.0 |
| Feb | -6° / -18° | 22 | 6.3 | 7.6 | 9.6 | 0.0 |
| Mar | 1° / -11° | 35 | 8.7 | 8.7 | 11.5 | 0.0 |
| Apr | 11° / -1° | 70 | 11.9 | 5.1 | 13.6 | 2.6 |
| May | 18° / 5° | 94 | 13.2 | 1.4 | 15.4 | 5.3 |
| Jun | 22° / 11° | 97 | 13.8 | 0 | 16.4 | 6.1 |
| Jul | 24° / 13° | 113 | 16.2 | 0 | 16 | 6.0 |
| Aug | 22° / 11° | 103 | 13.9 | 0 | 14.4 | 6.2 |
| Sep | 17° / 5° | 77 | 12.5 | 0.4 | 12.4 | 5.0 |
| Oct | 9° / -1° | 67 | 12 | 5.3 | 10.4 | 1.8 |
| Nov | -1° / -10° | 56 | 11.7 | 11.7 | 8.6 | 0.0 |
| Dec | -7° / -17° | 36 | 9.6 | 11.5 | 7.6 | 0.0 |
Cloud cover in April
The sky is clear or mostly clear about 24% of the time in April.
Beyond those clear spells, partly cloudy skies cover about 13% of April, with mostly cloudy or overcast conditions the remaining 63%.
| 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 (%) | 38 | 37 | 37 | 38 | 38 | 37 | 37 | 35 | 37 | 37 | 37 | 37 | 37 | 36 | 38 | 37 | 37 | 37 | 37 | 37 | 36 | 37 | 36 | 37 | 37 | 38 | 39 | 38 | 38 | 39 |
| Cloudier (%) | 62 | 63 | 63 | 62 | 62 | 63 | 63 | 65 | 63 | 63 | 63 | 63 | 63 | 64 | 62 | 63 | 63 | 63 | 63 | 63 | 64 | 63 | 64 | 63 | 63 | 62 | 61 | 62 | 62 | 61 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 38 | 62 |
| 2 | 37 | 63 |
| 3 | 37 | 63 |
| 4 | 38 | 62 |
| 5 | 38 | 62 |
| 6 | 37 | 63 |
| 7 | 37 | 63 |
| 8 | 35 | 65 |
| 9 | 37 | 63 |
| 10 | 37 | 63 |
| 11 | 37 | 63 |
| 12 | 37 | 63 |
| 13 | 37 | 63 |
| 14 | 36 | 64 |
| 15 | 38 | 62 |
| 16 | 37 | 63 |
| 17 | 37 | 63 |
| 18 | 37 | 63 |
| 19 | 37 | 63 |
| 20 | 37 | 63 |
| 21 | 36 | 64 |
| 22 | 37 | 63 |
| 23 | 36 | 64 |
| 24 | 37 | 63 |
| 25 | 37 | 63 |
| 26 | 38 | 62 |
| 27 | 39 | 61 |
| 28 | 38 | 62 |
| 29 | 38 | 62 |
| 30 | 39 | 61 |
Chance of precipitation in April
Gorno-Altaysk gets around 70 mm of rain and snow over 11.9 wet days in April. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable precipitation averages around 38% and peaks near 41% on the wettest days, and about 5 days bring snow. 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 34 | 34 | 34 | 34 | 35 | 35 | 36 | 36 | 37 | 37 | 37 | 38 | 38 | 38 | 38 | 38 | 38 | 39 | 40 | 40 | 41 | 41 | 41 | 41 | 41 | 41 | 41 | 41 | 41 | 41 |
| Snow chance (%) | 25 | 25 | 24 | 24 | 23 | 23 | 22 | 21 | 21 | 20 | 19 | 18 | 18 | 17 | 16 | 15 | 14 | 14 | 13 | 13 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 10 | 10 | 9 |
| Rain chance (%) | Snow chance (%) | |
|---|---|---|
| 1 | 34 | 25 |
| 2 | 34 | 25 |
| 3 | 34 | 24 |
| 4 | 34 | 24 |
| 5 | 35 | 23 |
| 6 | 35 | 23 |
| 7 | 36 | 22 |
| 8 | 36 | 21 |
| 9 | 37 | 21 |
| 10 | 37 | 20 |
| 11 | 37 | 19 |
| 12 | 38 | 18 |
| 13 | 38 | 18 |
| 14 | 38 | 17 |
| 15 | 38 | 16 |
| 16 | 38 | 15 |
| 17 | 38 | 14 |
| 18 | 39 | 14 |
| 19 | 40 | 13 |
| 20 | 40 | 13 |
| 21 | 41 | 12 |
| 22 | 41 | 12 |
| 23 | 41 | 12 |
| 24 | 41 | 12 |
| 25 | 41 | 11 |
| 26 | 41 | 11 |
| 27 | 41 | 11 |
| 28 | 41 | 10 |
| 29 | 41 | 10 |
| 30 | 41 | 9 |
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 8 km/h in April.
Across April, daily wind ranges from about 7 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 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 7 | 7 | 7 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 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 | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 7 | calm |
| 2 | 7 | calm |
| 3 | 7 | calm |
| 4 | 8 | calm |
| 5 | 8 | calm |
| 6 | 8 | calm |
| 7 | 8 | calm |
| 8 | 8 | calm |
| 9 | 8 | calm |
| 10 | 8 | calm |
| 11 | 8 | calm |
| 12 | 8 | calm |
| 13 | 8 | calm |
| 14 | 8 | calm |
| 15 | 8 | calm |
| 16 | 8 | calm |
| 17 | 8 | calm |
| 18 | 8 | calm |
| 19 | 8 | calm |
| 20 | 8 | calm |
| 21 | 8 | calm |
| 22 | 8 | calm |
| 23 | 8 | calm |
| 24 | 8 | calm |
| 25 | 9 | calm |
| 26 | 9 | calm |
| 27 | 9 | calm |
| 28 | 9 | calm |
| 29 | 9 | calm |
| 30 | 9 | calm |
Sunrise & sunset in April
Daylight runs from about 12 h 36 min at the start of April to 14 h 30 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 114 minutes over April. Sunrise moves from 6:03 AM to 4:58 AM, and sunset from 6:39 PM to 7:29 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) | 12.6 | 12.7 | 12.7 | 12.8 | 12.9 | 12.9 | 13.0 | 13.1 | 13.1 | 13.2 | 13.3 | 13.3 | 13.4 | 13.5 | 13.5 | 13.6 | 13.7 | 13.7 | 13.8 | 13.9 | 13.9 | 14.0 | 14.1 | 14.1 | 14.2 | 14.3 | 14.3 | 14.4 | 14.5 | 14.5 |
| Sunrise (AM) | 6:03 | 6:01 | 5:58 | 5:56 | 5:53 | 5:51 | 5:49 | 5:46 | 5:44 | 5:42 | 5:40 | 5:37 | 5:35 | 5:33 | 5:30 | 5:28 | 5:26 | 5:24 | 5:21 | 5:19 | 5:17 | 5:15 | 5:13 | 5:11 | 5:09 | 5:06 | 5:04 | 5:02 | 5:00 | 4:58 |
| Sunset (PM) | 6:39 | 6:41 | 6:42 | 6:44 | 6:46 | 6:48 | 6:49 | 6:51 | 6:53 | 6:55 | 6:56 | 6:58 | 7:00 | 7:02 | 7:03 | 7:05 | 7:07 | 7:08 | 7:10 | 7:12 | 7:14 | 7:15 | 7:17 | 7:19 | 7:20 | 7:22 | 7:24 | 7:26 | 7:27 | 7:29 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.6 | 6:03 | 6:39 |
| 2 | 12.7 | 6:01 | 6:41 |
| 3 | 12.7 | 5:58 | 6:42 |
| 4 | 12.8 | 5:56 | 6:44 |
| 5 | 12.9 | 5:53 | 6:46 |
| 6 | 12.9 | 5:51 | 6:48 |
| 7 | 13.0 | 5:49 | 6:49 |
| 8 | 13.1 | 5:46 | 6:51 |
| 9 | 13.1 | 5:44 | 6:53 |
| 10 | 13.2 | 5:42 | 6:55 |
| 11 | 13.3 | 5:40 | 6:56 |
| 12 | 13.3 | 5:37 | 6:58 |
| 13 | 13.4 | 5:35 | 7:00 |
| 14 | 13.5 | 5:33 | 7:02 |
| 15 | 13.5 | 5:30 | 7:03 |
| 16 | 13.6 | 5:28 | 7:05 |
| 17 | 13.7 | 5:26 | 7:07 |
| 18 | 13.7 | 5:24 | 7:08 |
| 19 | 13.8 | 5:21 | 7:10 |
| 20 | 13.9 | 5:19 | 7:12 |
| 21 | 13.9 | 5:17 | 7:14 |
| 22 | 14.0 | 5:15 | 7:15 |
| 23 | 14.1 | 5:13 | 7:17 |
| 24 | 14.1 | 5:11 | 7:19 |
| 25 | 14.2 | 5:09 | 7:20 |
| 26 | 14.3 | 5:06 | 7:22 |
| 27 | 14.3 | 5:04 | 7:24 |
| 28 | 14.4 | 5:02 | 7:26 |
| 29 | 14.5 | 5:00 | 7:27 |
| 30 | 14.5 | 4:58 | 7:29 |
Solar energy in April
Average shortwave solar energy reaching the ground each day in April, about 4.69 kWh/m².
For context, solar energy here swings from a low near 0.78 kWh/m² to a high of 6.09 kWh/m² in June across the year — April's 4.69 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) | 4.2 | 4.2 | 4.3 | 4.3 | 4.3 | 4.4 | 4.4 | 4.5 | 4.5 | 4.5 | 4.5 | 4.6 | 4.6 | 4.7 | 4.7 | 4.7 | 4.8 | 4.8 | 4.8 | 4.9 | 4.9 | 4.9 | 5.0 | 5.0 | 5.0 | 5.1 | 5.1 | 5.2 | 5.2 | 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 | 4.2 | Bright |
| 2 | 4.2 | Bright |
| 3 | 4.3 | Bright |
| 4 | 4.3 | Bright |
| 5 | 4.3 | Bright |
| 6 | 4.4 | Bright |
| 7 | 4.4 | Bright |
| 8 | 4.5 | Bright |
| 9 | 4.5 | Bright |
| 10 | 4.5 | Bright |
| 11 | 4.5 | Bright |
| 12 | 4.6 | Bright |
| 13 | 4.6 | Bright |
| 14 | 4.7 | Bright |
| 15 | 4.7 | Bright |
| 16 | 4.7 | Bright |
| 17 | 4.8 | Bright |
| 18 | 4.8 | Bright |
| 19 | 4.8 | Bright |
| 20 | 4.9 | Bright |
| 21 | 4.9 | Bright |
| 22 | 4.9 | Bright |
| 23 | 5.0 | Bright |
| 24 | 5.0 | Bright |
| 25 | 5.0 | Bright |
| 26 | 5.1 | Bright |
| 27 | 5.1 | Bright |
| 28 | 5.2 | Bright |
| 29 | 5.2 | Bright |
| 30 | 5.3 | Bright |
Hazard calendar for Gorno-Altaysk
In April, Gorno-Altaysk sits inside its rainy season season. The full year is below, with each hazard's peak months called out.
Gorno-Altaysk's rainy season runs April–November, when most of the year's rain falls.
Is April a good time to visit Gorno-Altaysk?
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 Gorno-Altaysk.
What to pack for Gorno-Altaysk in April
From April's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In April, Gorno-Altaysk sees daytime highs around 11°C and nights near -1°C. Pack a warm layer. Worth having: rain gear and sun protection. About 12 days see rain.
UV index in Gorno-Altaysk in April
Clear-sky midday UV in April peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Gorno-Altaysk peaks around July 18 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 | 2 | 4 | 6 | 6 | 6 | 6 | 4 | 2 | 1 | 1 |
| Level | Low | Low | Moderate | Moderate | High | High | High | High | Moderate | Low | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 1 | Low |
| Mar | 2 | Moderate |
| Apr | 4 | Moderate |
| May | 6 | High |
| Jun | 6 | High |
| Jul | 6 | High |
| Aug | 6 | High |
| Sep | 4 | Moderate |
| Oct | 2 | Low |
| Nov | 1 | Low |
| Dec | 1 | Low |
Where is Gorno-Altaysk?
Gorno-Altaysk sits at 52.0°N, 85.9°E, 285 m above sea level, in Russia. The nearest listed city is Mayma, 5.0 km away.
Topography around Gorno-Altaysk
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Gorno-Altaysk.
Within 3 km, the terrain around Gorno-Altaysk has significant variations in elevation — a maximum elevation change of 366 m around an average of 384 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 973 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,208 m.
The land around Gorno-Altaysk is covered by trees (61%) and grassland (24%) within 3 km, grassland (48%) and trees (46%) within 16 km, and trees (57%) and grassland (27%) 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 Gorno-Altaysk (51.9606°, 85.9189°, elevation 285 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).