Climate averages 1991–2020
Isulan weather
in December.
A hot, wet month: the joint 9th warmest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a hot month in Isulan: daytime highs average 30.0°C and nights cool to about 23.6°C. By daytime temperature it is the joint 9th warmest of the 12 months.
Expect about 130 mm of rain on roughly 20 days, which makes December a wet month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 45 min on an average December day.
The nearest other city in this atlas is Tacurong (11 km away). In December its highs average 28.7°C, 1.2°C cooler than Isulan, with 212 mm of rain.
Among the 151 cities listed in the Philippines, Isulan ranks joint 4th of 151 for the warmest December highs and joint 55th of 151 for the driest December (rainfall, lowest first). The mean December high of those 151 cities is 28.1°C; Isulan is 1.9°C warmer than that mean.
From December to January, average highs fall by 0.2°C to 29.8°C, and monthly rainfall falls from 130 mm to 129 mm.
The annual picture
December 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 | 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, selected | 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
December in nearby cities
- Tacurong in DecemberPhilippines · 11 kmHigh 28.7°C · Low 22.9°C · 212 mm rain
- Banga in DecemberPhilippines · 30 kmHigh 28.6°C · Low 22.3°C · 111 mm rain
- Koronadal in DecemberPhilippines · 30 kmHigh 29.0°C · Low 22.9°C · 111 mm rain
- Surallah in DecemberPhilippines · 32 kmHigh 28.8°C · Low 22.6°C · 111 mm rain
- Lambayong in DecemberPhilippines · 50 kmHigh 25.4°C · Low 19.3°C · 142 mm rain
- Tupi in DecemberPhilippines · 51 kmHigh 28.6°C · Low 22.0°C · 158 mm rain
- Malingao in DecemberPhilippines · 61 kmHigh 30.9°C · Low 23.6°C · 146 mm rain
- Budta in DecemberPhilippines · 66 kmHigh 30.5°C · Low 23.5°C · 146 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.