| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 28.2° | 15.6° | 138.1mm | 17 | 65 |
| February | 27.2° | 14.1° | 105.4mm | 16 | 69 |
| March | 26.7° | 14.2° | 104.8mm | 16 | 70 |
| April | 27.3° | 11.4° | — | — | 93 |
| May | 25.2° | 6.2° | — | — | 94 |
| June | 24.7° | 4.6° | — | — | 94 |
| July | 26° | 3.2° | — | — | 94 |
| August | 27.2° | 5.2° | — | — | 93 |
| September | 28.7° | 7.6° | — | — | 87 |
| October | 28.8° | 11.6° | — | — | 87 |
| November | 28.9° | 13.3° | 74.6mm | 13 | 66 |
| December | 29.1° | 14.5° | 126.2mm | 14 | 64 |
January in Tarija averages a daily high of 28.2°C with nights around 15.6°C. Expect roughly 17 wet days totalling 138.1mm. Generally workable, with some weather to plan around.
February in Tarija averages a daily high of 27.2°C with nights around 14.1°C. Expect roughly 16 wet days totalling 105.4mm. Generally workable, with some weather to plan around.
March in Tarija averages a daily high of 26.7°C with nights around 14.2°C. Expect roughly 16 wet days totalling 104.8mm. Generally workable, with some weather to plan around.
April in Tarija averages a daily high of 27.3°C with nights around 11.4°C. Comfortable conditions for being outdoors all day.
May in Tarija averages a daily high of 25.2°C with nights around 6.2°C. Comfortable conditions for being outdoors all day.
June in Tarija averages a daily high of 24.7°C with nights around 4.6°C. Comfortable conditions for being outdoors all day.
July in Tarija averages a daily high of 26°C with nights around 3.2°C. Comfortable conditions for being outdoors all day.
August in Tarija averages a daily high of 27.2°C with nights around 5.2°C. Comfortable conditions for being outdoors all day.
September in Tarija averages a daily high of 28.7°C with nights around 7.6°C. Comfortable conditions for being outdoors all day.
October in Tarija averages a daily high of 28.8°C with nights around 11.6°C. Comfortable conditions for being outdoors all day.
November in Tarija averages a daily high of 28.9°C with nights around 13.3°C. Expect roughly 13 wet days totalling 74.6mm. Generally workable, with some weather to plan around.
December in Tarija averages a daily high of 29.1°C with nights around 14.5°C. Expect roughly 14 wet days totalling 126.2mm. 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. Tarija peaks at 94.
Based on 30 years of records, April–October scores highest for comfort in Tarija, balancing daytime temperature against rainfall.
December is the warmest, averaging a daily high of 29.1°C.
January is the wettest, averaging 138.1mm of rain across roughly 17 wet days.
June is the coolest month, with average daily highs around 24.7°C.