Climate averages 1991–2020
Isulan weather
in September.
A hot, very wet month: the joint 4th warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Isulan: daytime highs average 30.4°C and nights cool to about 23.6°C. By daytime temperature it is the joint 4th warmest of the 12 months.
Expect about 211 mm of rain on roughly 25 days, which makes September a very wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 10 min on an average September day.
The nearest other city in this atlas is Tacurong (11 km away). In September its highs average 29.3°C, 1.1°C cooler than Isulan, with 153 mm of rain.
Among the 151 cities listed in the Philippines, Isulan ranks joint 9th of 151 for the warmest September highs and 37th of 151 for the driest September (rainfall, lowest first). The mean September high of those 151 cities is 29.0°C; Isulan is 1.4°C warmer than that mean.
From September to October, average highs fall by 0.2°C to 30.2°C, and monthly rainfall rises from 211 mm to 238 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
Isulan climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.8°C23.4°C | 23.4°C | 129 | 16.9 | 11.812 h |
| February | 30.4°C23.6°C | 23.6°C | 100 | 14.2 | 11.912 h |
| March | 31.6°C24.0°C | 24.0°C | 112 | 15.8 | 12.112 h |
| April | 32.5°C24.6°C | 24.6°C | 123 | 18.2 | 12.312 h |
| May | 31.6°C24.5°C | 24.5°C | 225 | 27.1 | 12.412 h |
| June | 30.4°C23.9°C | 23.9°C | 257 | 27.0 | 12.512 h |
| July | 29.9°C23.6°C | 23.6°C | 256 | 26.6 | 12.512 h |
| August | 30.2°C23.6°C | 23.6°C | 214 | 25.1 | 12.312 h |
| September, selected | 30.4°C23.6°C | 23.6°C | 211 | 25.0 | 12.212 h |
| October | 30.2°C23.5°C | 23.5°C | 238 | 26.3 | 12.012 h |
| November | 30.0°C23.4°C | 23.4°C | 171 | 23.1 | 11.812 h |
| December | 30.0°C23.6°C | 23.6°C | 130 | 19.9 | 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
- Tacurong in SeptemberPhilippines · 11 kmHigh 29.3°C · Low 23.0°C · 153 mm rain
- Banga in SeptemberPhilippines · 30 kmHigh 29.0°C · Low 22.3°C · 168 mm rain
- Koronadal in SeptemberPhilippines · 30 kmHigh 29.5°C · Low 23.0°C · 168 mm rain
- Surallah in SeptemberPhilippines · 32 kmHigh 29.1°C · Low 22.5°C · 168 mm rain
- Lambayong in SeptemberPhilippines · 50 kmHigh 25.8°C · Low 19.4°C · 185 mm rain
- Tupi in SeptemberPhilippines · 51 kmHigh 28.9°C · Low 22.1°C · 187 mm rain
- Malingao in SeptemberPhilippines · 61 kmHigh 30.2°C · Low 23.9°C · 153 mm rain
- Budta in SeptemberPhilippines · 66 kmHigh 29.8°C · Low 23.8°C · 153 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 Isulan) is explained once on the Isulan year overview and on the Sources, method and limits page.