| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 31° | 22.6° | 480.3mm | 22.9 | 54 |
| February | 31.4° | — | 346.4mm | 18 | 52 |
| March | 32.4° | — | 325.4mm | 18.7 | 48 |
| April | 32.6° | — | 307.9mm | 18.1 | 48 |
| May | 33° | — | 248.9mm | 17.3 | 46 |
| June | 32.6° | — | 225.1mm | 15.5 | 48 |
| July | 32.9° | — | 188.9mm | 14.1 | 48 |
| August | 32.6° | — | 232.4mm | 15.6 | 48 |
| September | 32.1° | — | 223mm | 17.1 | 50 |
| October | 32° | — | 257.4mm | 20 | 50 |
| November | 31.9° | — | 360.3mm | 22.3 | 50 |
| December | 31.6° | — | 430.9mm | 23.7 | 52 |
January in Sibu averages a daily high of 31°C with nights around 22.6°C. Expect roughly 22.9 wet days totalling 480.3mm. Demanding conditions — pack for it and plan indoor options.
February in Sibu averages a daily high of 31.4°C. Expect roughly 18 wet days totalling 346.4mm. Demanding conditions — pack for it and plan indoor options.
March in Sibu averages a daily high of 32.4°C. Expect roughly 18.7 wet days totalling 325.4mm. Demanding conditions — pack for it and plan indoor options.
April in Sibu averages a daily high of 32.6°C. Expect roughly 18.1 wet days totalling 307.9mm. Demanding conditions — pack for it and plan indoor options.
May in Sibu averages a daily high of 33°C. Expect roughly 17.3 wet days totalling 248.9mm. Demanding conditions — pack for it and plan indoor options.
June in Sibu averages a daily high of 32.6°C. Expect roughly 15.5 wet days totalling 225.1mm. Demanding conditions — pack for it and plan indoor options.
July in Sibu averages a daily high of 32.9°C. Expect roughly 14.1 wet days totalling 188.9mm. Demanding conditions — pack for it and plan indoor options.
August in Sibu averages a daily high of 32.6°C. Expect roughly 15.6 wet days totalling 232.4mm. Demanding conditions — pack for it and plan indoor options.
September in Sibu averages a daily high of 32.1°C. Expect roughly 17.1 wet days totalling 223mm. Demanding conditions — pack for it and plan indoor options.
October in Sibu averages a daily high of 32°C. Expect roughly 20 wet days totalling 257.4mm. Demanding conditions — pack for it and plan indoor options.
November in Sibu averages a daily high of 31.9°C. Expect roughly 22.3 wet days totalling 360.3mm. Demanding conditions — pack for it and plan indoor options.
December in Sibu averages a daily high of 31.6°C. Expect roughly 23.7 wet days totalling 430.9mm. Demanding conditions — pack for it and plan indoor options.
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. Sibu peaks at 54.
Based on 30 years of records, Any time of year scores highest for comfort in Sibu, balancing daytime temperature against rainfall.
May is the warmest, averaging a daily high of 33°C.
January is the wettest, averaging 480.3mm of rain across roughly 22.9 wet days.
January is the coolest month, with average daily highs around 31°C.