| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 32.1° | 21.5° | 113.8mm | 6 | 68 |
| February | 32.5° | 21.5° | 110.5mm | 7 | 64 |
| March | 32.4° | 21.9° | 113.2mm | 8.3 | 62 |
| April | 32.3° | 22.4° | 146.2mm | 9.5 | 60 |
| May | 32.5° | 22.2° | 102.8mm | 6.6 | 65 |
| June | 32.3° | 21.8° | 76.5mm | 5.8 | 67 |
| July | 31.8° | 21.5° | 138.4mm | 7 | 67 |
| August | 31.7° | 21.6° | 362mm | 18 | 51 |
| September | 31.4° | 21.7° | 165.1mm | 7 | 68 |
| October | 31.2° | 21.9° | 76.7mm | 8 | 67 |
| November | 31° | 22° | 256.5mm | 12.7 | 59 |
| December | 31.4° | 21.9° | 98.9mm | 9.5 | 63 |
January in Sibolga averages a daily high of 32.1°C with nights around 21.5°C. Expect roughly 6 wet days totalling 113.8mm. Generally workable, with some weather to plan around.
February in Sibolga averages a daily high of 32.5°C with nights around 21.5°C. Expect roughly 7 wet days totalling 110.5mm. Generally workable, with some weather to plan around.
March in Sibolga averages a daily high of 32.4°C with nights around 21.9°C. Expect roughly 8.3 wet days totalling 113.2mm. Generally workable, with some weather to plan around.
April in Sibolga averages a daily high of 32.3°C with nights around 22.4°C. Expect roughly 9.5 wet days totalling 146.2mm. Generally workable, with some weather to plan around.
May in Sibolga averages a daily high of 32.5°C with nights around 22.2°C. Expect roughly 6.6 wet days totalling 102.8mm. Generally workable, with some weather to plan around.
June in Sibolga averages a daily high of 32.3°C with nights around 21.8°C. Expect roughly 5.8 wet days totalling 76.5mm. Generally workable, with some weather to plan around.
July in Sibolga averages a daily high of 31.8°C with nights around 21.5°C. Expect roughly 7 wet days totalling 138.4mm. Generally workable, with some weather to plan around.
August in Sibolga averages a daily high of 31.7°C with nights around 21.6°C. Expect roughly 18 wet days totalling 362mm. Demanding conditions — pack for it and plan indoor options.
September in Sibolga averages a daily high of 31.4°C with nights around 21.7°C. Expect roughly 7 wet days totalling 165.1mm. Generally workable, with some weather to plan around.
October in Sibolga averages a daily high of 31.2°C with nights around 21.9°C. Expect roughly 8 wet days totalling 76.7mm. Generally workable, with some weather to plan around.
November in Sibolga averages a daily high of 31°C with nights around 22°C. Expect roughly 12.7 wet days totalling 256.5mm. Generally workable, with some weather to plan around.
December in Sibolga averages a daily high of 31.4°C with nights around 21.9°C. Expect roughly 9.5 wet days totalling 98.9mm. Generally workable, with some weather to plan around.
Each month scores out of 100. It starts at 100 and loses points for daytime highs outside a 20–27°C band, for wet days, and for nights below 2°C. Nothing else is weighted in — no crowd data, no prices, no opinion. Sibolga peaks at 68.
Based on 30 years of records, December–July scores highest for comfort in Sibolga, balancing daytime temperature against rainfall.
February is the warmest, averaging a daily high of 32.5°C.
August is the wettest, averaging 362mm of rain across roughly 18 wet days.
November is the coolest month, with average daily highs around 31°C.