Suhu rata-rata tahunan di Tunasbaru adalah +26.2°. Bulan terpanas adalah September (rata-rata siang +30.3°), dan terdingin Juli (rata-rata malam +22.4°). Chove cerca de 2984 mm por ano, com pico em Desember (387 mm). Data merupakan rata-rata iklim 60 tahun terakhir dan rekor dari 66 tahun pengamatan.
| Bulan | Siang | Malam | Curah hujan | Hari hujan | Rekor maks. | Rekor min. |
|---|---|---|---|---|---|---|
| Januari | +28.3° | +23.1° | 363 mm | 29 | +32.6° (2024) | +20° (1969) |
| Februari | +28.6° | +23.2° | 310 mm | 27 | +33° (2025) | +20.9° (1966) |
| Maret | +29° | +23.3° | 331 mm | 29 | +32.5° (2025) | +21° (1965) |
| April | +29.5° | +23.4° | 293 mm | 28 | +32.2° (2024) | +20.6° (2021) |
| Mei | +29.8° | +23.3° | 213 mm | 26 | +32.4° (2024) | +20° (2004) |
| Juni | +29.6° | +22.8° | 151 mm | 21 | +32.7° (2023) | +19.1° (1961) |
| Juli | +29.5° | +22.4° | 116 mm | 18 | +35.3° (2024) | +19.2° (1986) |
| Agustus | +29.9° | +22.4° | 106 mm | 18 | +36.3° (2024) | +19.2° (1999) |
| September | +30.3° | +22.6° | 142 mm | 20 | +37.4° (2023) | +19.1° (1982) |
| Oktober | +30.3° | +23.1° | 237 mm | 25 | +37.2° (2019) | +18.8° (1966) |
| November | +29.3° | +23.3° | 335 mm | 27 | +35.7° (1997) | +19.4° (1966) |
| Desember | +28.5° | +23.2° | 387 mm | 29 | +37.2° (2023) | +20.1° (2001) |