| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 31.1° | 23.4° | 57.6mm | 4.5 | 75 |
| February | 30.8° | 22.6° | 78.6mm | 7.5 | 70 |
| March | 31.4° | 23.3° | 42.5mm | 5 | 72 |
| April | 32.7° | 23.3° | 14.9mm | 2 | 73 |
| May | 33° | 22.5° | 10mm | 0.8 | 74 |
| June | 32.7° | 22.7° | 4mm | 0.7 | 76 |
| July | 32.5° | 20.9° | 0.1mm | 0.3 | 77 |
| August | 33.2° | 20.5° | 0mm | 0 | 75 |
| September | 34.4° | 21.8° | 0.2mm | 0.3 | 70 |
| October | 34.9° | — | 0.5mm | 0.5 | 67 |
| November | 34.2° | 24° | 64.1mm | 3.7 | 64 |
| December | 32° | — | 69.6mm | 5.7 | 69 |
January in Sumbawa Besar averages a daily high of 31.1°C with nights around 23.4°C. Expect roughly 4.5 wet days totalling 57.6mm. Comfortable conditions for being outdoors all day.
February in Sumbawa Besar averages a daily high of 30.8°C with nights around 22.6°C. Expect roughly 7.5 wet days totalling 78.6mm. Generally workable, with some weather to plan around.
March in Sumbawa Besar averages a daily high of 31.4°C with nights around 23.3°C. Expect roughly 5 wet days totalling 42.5mm. Generally workable, with some weather to plan around.
April in Sumbawa Besar averages a daily high of 32.7°C with nights around 23.3°C. Rain is rare — about 2 wet days and 14.9mm across the month. Generally workable, with some weather to plan around.
May in Sumbawa Besar averages a daily high of 33°C with nights around 22.5°C. Rain is rare — about 0.8 wet days and 10mm across the month. Generally workable, with some weather to plan around.
June in Sumbawa Besar averages a daily high of 32.7°C with nights around 22.7°C. Rain is rare — about 0.7 wet days and 4mm across the month. Comfortable conditions for being outdoors all day.
July in Sumbawa Besar averages a daily high of 32.5°C with nights around 20.9°C. Rain is rare — about 0.3 wet days and 0.1mm across the month. Comfortable conditions for being outdoors all day.
August in Sumbawa Besar averages a daily high of 33.2°C with nights around 20.5°C. Rain is rare — about 0 wet days and 0mm across the month. Comfortable conditions for being outdoors all day.
September in Sumbawa Besar averages a daily high of 34.4°C with nights around 21.8°C. Rain is rare — about 0.3 wet days and 0.2mm across the month. Generally workable, with some weather to plan around.
October in Sumbawa Besar averages a daily high of 34.9°C. Rain is rare — about 0.5 wet days and 0.5mm across the month. Generally workable, with some weather to plan around.
November in Sumbawa Besar averages a daily high of 34.2°C with nights around 24°C. Expect roughly 3.7 wet days totalling 64.1mm. Generally workable, with some weather to plan around.
December in Sumbawa Besar averages a daily high of 32°C. Expect roughly 5.7 wet days totalling 69.6mm. 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. Sumbawa Besar peaks at 77.
Based on 30 years of records, December–September scores highest for comfort in Sumbawa Besar, balancing daytime temperature against rainfall.
October is the warmest, averaging a daily high of 34.9°C.
February is the wettest, averaging 78.6mm of rain across roughly 7.5 wet days.
February is the coolest month, with average daily highs around 30.8°C.