Climate averages 1991–2020
Oyan weather
in September.
A hot, very wet month: the 10th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Oyan: daytime highs average 28.1°C and nights cool to about 21.3°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 264 mm of rain on roughly 27 days, which makes September a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 10 min on an average September day.
The nearest other city in this atlas is Offa (12 km away). In September its highs average 27.9°C, about as warm as Oyan, with 211 mm of rain.
Among the 143 cities listed in Nigeria, Oyan ranks joint 74th of 143 for the warmest September highs and joint 108th of 143 for the driest September (rainfall, lowest first). The mean September high of those 143 cities is 28.6°C; Oyan is 0.5°C cooler than that mean.
From September to October, average highs rise by 1.5°C to 29.6°C, and monthly rainfall falls from 264 mm to 220 mm.
The annual picture
September in context
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
Oyan climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 33.8°C20.8°C | 20.8°C | 11 | 2.1 | 11.712 h |
| February | 34.8°C22.2°C | 22.2°C | 24 | 4.7 | 11.912 h |
| March | 34.2°C23.3°C | 23.3°C | 66 | 13.1 | 12.112 h |
| April | 32.6°C23.3°C | 23.3°C | 104 | 17.6 | 12.312 h |
| May | 30.7°C22.9°C | 22.9°C | 164 | 22.9 | 12.512 h |
| June | 28.8°C22.0°C | 22.0°C | 202 | 25.9 | 12.613 h |
| July | 27.4°C21.3°C | 21.3°C | 200 | 27.2 | 12.513 h |
| August | 27.1°C21.0°C | 21.0°C | 197 | 25.3 | 12.412 h |
| September, selected | 28.1°C21.3°C | 21.3°C | 264 | 27.3 | 12.212 h |
| October | 29.6°C21.6°C | 21.6°C | 220 | 25.2 | 12.012 h |
| November | 31.9°C22.0°C | 22.0°C | 40 | 6.7 | 11.812 h |
| December | 33.2°C21.0°C | 21.0°C | 6.1 | 1.5 | 11.712 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
September in nearby cities
- Offa in SeptemberNigeria · 12 kmHigh 27.9°C · Low 21.2°C · 211 mm rain
- Ila Orangun in SeptemberNigeria · 16 kmHigh 27.8°C · Low 20.9°C · 273 mm rain
- Ikirun in SeptemberNigeria · 19 kmHigh 28.0°C · Low 21.4°C · 264 mm rain
- Oke Mesi in SeptemberNigeria · 31 kmHigh 27.1°C · Low 20.6°C · 243 mm rain
- Osogbo in SeptemberNigeria · 39 kmHigh 28.0°C · Low 21.6°C · 204 mm rain
- Ilobu in SeptemberNigeria · 39 kmHigh 28.1°C · Low 21.6°C · 204 mm rain
- Ipoti in SeptemberNigeria · 39 kmHigh 27.3°C · Low 20.3°C · 243 mm rain
- Ijero-Ekiti in SeptemberNigeria · 42 kmHigh 27.6°C · Low 20.9°C · 243 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 Oyan) is explained once on the Oyan year overview and on the Sources, method and limits page.
Ikirun lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.