Climate averages 1991–2020
Ulan Bator weather
in April.
A cool, fairly dry month: the 6th warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
April is a cool month in Ulan Bator: daytime highs average 8.8°C and nights cool to about -3.6°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 16 mm of rain on roughly 4 days, which makes April a fairly dry month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 37 min on an average April day.
The nearest other city in this atlas is Darhan (189 km away). In April its highs average 11.9°C, 3.1°C warmer than Ulan Bator, with 18 mm of rain.
Among the 3 cities listed in Mongolia, Ulan Bator ranks 3rd of 3 for the warmest April highs and 1st of 3 for the driest April (rainfall, lowest first). The mean April high of those 3 cities is 9.9°C; Ulan Bator is 1.1°C cooler than that mean.
From April to May, average highs rise by 7.0°C to 15.8°C, and monthly rainfall rises from 16 mm to 34 mm.
The annual picture
April in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Ulan Bator climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -12.4°C-24.8°C | -24.8°C | 1.5 | 0.5 | 8.99 h |
| February | -7.4°C-21.2°C | -21.2°C | 2.8 | 1.2 | 10.210 h |
| March | 0.9°C-11.9°C | -11.9°C | 7.3 | 2.2 | 11.912 h |
| April, selected | 8.8°C-3.6°C | -3.6°C | 16 | 4.3 | 13.614 h |
| May | 15.8°C1.7°C | 1.7°C | 34 | 6.7 | 15.115 h |
| June | 21.4°C8.4°C | 8.4°C | 55 | 9.5 | 16.016 h |
| July | 23.7°C11.9°C | 11.9°C | 66 | 11.2 | 15.616 h |
| August | 21.7°C9.8°C | 9.8°C | 68 | 10.7 | 14.314 h |
| September | 15.6°C3.0°C | 3.0°C | 39 | 7.2 | 12.613 h |
| October | 6.5°C-4.1°C | -4.1°C | 15 | 3.8 | 10.911 h |
| November | -3.7°C-13.5°C | -13.5°C | 6.1 | 2.1 | 9.39 h |
| December | -10.8°C-20.9°C | -20.9°C | 2.1 | 0.9 | 8.58 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
April in nearby cities
- Darhan in AprilMongolia · 189 kmHigh 11.9°C · Low -1.6°C · 18 mm rain
- Erdenet in AprilMongolia · 241 kmHigh 9.0°C · Low -2.8°C · 21 mm rain
- Ulan-Ude in AprilRussia · 439 kmHigh 9.4°C · Low -2.6°C · 15 mm rain
- Irkutsk in AprilRussia · 522 kmHigh 9.4°C · Low -2.7°C · 22 mm rain
- Angarsk in AprilRussia · 559 kmHigh 9.7°C · Low -2.6°C · 19 mm rain
- Usol’ye-Sibirskoye in AprilRussia · 585 kmHigh 9.5°C · Low -2.8°C · 20 mm rain
- Chita in AprilRussia · 659 kmHigh 8.5°C · Low -3.4°C · 15 mm rain
- Bayan Nur in AprilChina · 798 kmHigh 18.3°C · Low 3.1°C · 7.8 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Ulan Bator) is explained once on the Ulan Bator year overview and on the Sources, method and limits page.