Ulaanbaatar (Sergelen) vs Irkutsk: which is sunnier?
🇲🇳 Mongolia vs 🇷🇺 Russia · 542 km apart · long-term climate normals (NASA POWER, 2001–2020)
Ulaanbaatar (Sergelen) is the sunnier overall: about 3,261 hours of sunshine a year to Irkutsk's 2,466. Ulaanbaatar (Sergelen) has the higher Sunshine Score in 5 of 12 months; the other 7 are within 2 points.
Scores are the 0–100 Sunshine Score — sunshine, daytime warmth and dryness in one number, per month.
At a glance
| Ulaanbaatar (Sergelen) | Irkutsk | |
|---|---|---|
| Sunshine hours / year | 3,261 | 2,466 |
| Sunniest month | June (90/100) | June (83/100) |
| Nov–Feb average score | 0/100 | 0/100 |
| Jun–Aug average score | 88/100 | 80/100 |
| Rain / year | 246 mm | 419 mm |
| Peak midday UV | 7 (high) | 5 (moderate) |
Ulaanbaatar (Sergelen) vs Irkutsk month by month
| Month | Sunshine Score | Day high °C | Rain mm | |||
|---|---|---|---|---|---|---|
| Ulaanbaatar (Sergelen) | Irkutsk | Ulaanbaatar (Sergelen) | Irkutsk | Ulaanbaatar (Sergelen) | Irkutsk | |
| January | 0 | 0 | -15° | -17° | 3 | 11 |
| February | 0 | 0 | -10° | -12° | 3 | 9 |
| March | 0 | 0 | -1° | -2° | 5 | 13 |
| April | 8 | 7 | 9° | 9° | 9 | 22 |
| May | 70 | 64 | 17° | 17° | 25 | 41 |
| June | 90 | 83 | 24° | 24° | 44 | 57 |
| July | 87 | 78 | 26° | 27° | 63 | 85 |
| August | 88 | 78 | 23° | 23° | 55 | 82 |
| September | 63 | 56 | 16° | 16° | 21 | 47 |
| October | 0 | 0 | 6° | 6° | 9 | 21 |
| November | 0 | 0 | -5° | -5° | 6 | 15 |
| December | 0 | 0 | -13° | -14° | 3 | 16 |
The sunnier month by month: Jan even · Feb even · Mar even · Apr even · May Ulaanbaatar (Sergelen) · Jun Ulaanbaatar (Sergelen) · Jul Ulaanbaatar (Sergelen) · Aug Ulaanbaatar (Sergelen) · Sep Ulaanbaatar (Sergelen) · Oct even · Nov even · Dec even.
When to pick which
- November–February: too close to call — Ulaanbaatar (Sergelen) averages 0/100, Irkutsk 0/100. Daytime highs are similar (-11°C vs -12°C). See the winter sun ranking.
- March–May: too close to call — Ulaanbaatar (Sergelen) averages 26/100, Irkutsk 24/100. Daytime highs are similar (8°C vs 8°C).
- June–August: Ulaanbaatar (Sergelen) (average score 88/100 vs 80). Daytime highs are similar (24°C vs 25°C).
- September–October: Ulaanbaatar (Sergelen) (average score 32/100 vs 28). Daytime highs are similar (11°C vs 11°C).
Full month-by-month guides: Ulaanbaatar (Sergelen) weather by month · Irkutsk weather by month · Best time to visit Russia.
More comparisons: Ulaanbaatar (Sergelen) vs Ulan Ude · Ulaanbaatar (Sergelen) vs Chita · Irkutsk vs Ulan Ude · Irkutsk vs Chita · all head-to-heads