Climate averages 1991–2020
Bayjī weather
by month.
See how the year changes. July has the highest average daily maximum; August (tied with June) has the lowest average monthly rainfall.
Pleasant-weather months by our simple rule: MarchAprilNovember
Long-term climate patterns, not a forecast for a particular trip.
Across the year Bayjī averages a daytime high of 29.4°C and a nighttime low of 16.9°C, with about 213 mm of rain on roughly 36 days. July is the warmest month (average high 43.6°C) and January the coolest (13.9°C). January is the wettest month with 39 mm; August (tied with June) is the driest with under 1 mm.
Months with pleasant weather by a simple rule (average high between 18°C and 29°C, average low of at least 5°C and at most 8 rain days): March, April and November. This looks at temperature and rain only, not humidity, wind, sea temperature or crowds.
The annual picture
A year in Bayjī
Monthly rainfall
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
Bayjī climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 13.9°C4.4°C | 4.4°C | 39 | 6.5 | 10.110 h |
| February | 16.5°C5.7°C | 5.7°C | 32 | 6.0 | 10.911 h |
| March | 22.0°C9.6°C | 9.6°C | 35 | 5.5 | 11.912 h |
| April | 28.5°C15.1°C | 15.1°C | 23 | 4.0 | 13.013 h |
| May | 35.3°C21.3°C | 21.3°C | 6.2 | 1.4 | 14.014 h |
| June | 40.7°C26.6°C | 26.6°C | 0.1 | 0.0 | 14.514 h |
| July | 43.6°C29.6°C | 29.6°C | 0.2 | 0.1 | 14.314 h |
| August | 43.4°C29.2°C | 29.2°C | 0.1 | 0.0 | 13.513 h |
| September | 38.9°C24.8°C | 24.8°C | 0.2 | 0.0 | 12.412 h |
| October | 32.0°C19.1°C | 19.1°C | 15 | 1.9 | 11.311 h |
| November | 21.8°C10.9°C | 10.9°C | 27 | 4.3 | 10.410 h |
| December | 15.6°C6.1°C | 6.1°C | 35 | 5.8 | 9.910 h |
Rainfall is the average of the 30 separate monthly totals. A rain 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
Nearby cities
- Ash SharqātIraq · 70 kmHigh 28.4°C · Low 15.8°C · 232 mm rain a year
- Sāmarrā’Iraq · 89 kmHigh 30.1°C · Low 17.1°C · 183 mm rain a year
- KirkukIraq · 102 kmHigh 27.8°C · Low 15.4°C · 482 mm rain a year
- Ţūz KhūrmātūIraq · 104 kmHigh 28.9°C · Low 16.7°C · 392 mm rain a year
- ErbilIraq · 148 kmHigh 26.3°C · Low 13.2°C · 552 mm rain a year
- XebatIraq · 151 kmHigh 26.7°C · Low 13.5°C · 492 mm rain a year
- KhasnahzānIraq · 153 kmHigh 24.9°C · Low 11.5°C · 716 mm rain a year
- KhālişIraq · 157 kmHigh 31.1°C · Low 18.7°C · 189 mm rain a year
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 limitsWhat do the high and low temperatures mean?
We average the daily maximum and daily minimum for each calendar month over 1991–2020. They are not record extremes, a forecast range or temperatures at a fixed time of day.
How is a rain day counted?
A local calendar day (standard time, UTC+3, no daylight saving) with at least 1 mm of total precipitation counts as one rain day. We count these for each year and month, then average across 30 years. The average does not predict which days will be wet.
Where do the numbers come from?
ERA5-Land (temperature) and ERA5 (precipitation) reanalysis from the Copernicus Climate Change Service, read from the Open-Meteo open-data archive. Temperature comes from the 0.1° model cell at 34.90°, 43.50° (3 km from the city centre), adjusted up by 0.1°C for the difference between the city's elevation (115 m) and the cell's (124 m). Rain comes from the 0.25° cell at 35.00°, 43.50°. These are model estimates, not weather-station readings; coast, hills and city streets can differ.
Does this page show sunshine, humidity or sea temperature?
No. The data used here contain air temperature and precipitation only. Daylight hours are calculated from the city's latitude (sunrise to sunset), not measured sunshine.