| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 5.3° | -2.3° | 50.4mm | 12.2 | 22 |
| February | 9.1° | -0.9° | 37.5mm | 10.3 | 40 |
| March | 13.5° | 2.3° | 48.5mm | 10.7 | 58 |
| April | 19° | 6.5° | 54mm | 10.8 | 75 |
| May | 24° | 11.3° | 69.2mm | 11.7 | 77 |
| June | 28.2° | 14.7° | 57.6mm | 9.8 | 76 |
| July | 30.9° | 16.4° | 50.9mm | 7.7 | 69 |
| August | 30.8° | 16.2° | 47.6mm | 6.3 | 72 |
| September | 25.2° | 12.1° | 52.2mm | 9.1 | 82 |
| October | 19.3° | 7.3° | 50.3mm | 8.3 | 81 |
| November | 13.2° | 3.3° | 57mm | 9.6 | 59 |
| December | 6.4° | -0.8° | 55.2mm | 12.1 | 28 |
January in Niš averages a daily high of 5.3°C with nights around -2.3°C. Expect roughly 12.2 wet days totalling 50.4mm. A hard month to visit for comfort alone.
February in Niš averages a daily high of 9.1°C with nights around -0.9°C. Expect roughly 10.3 wet days totalling 37.5mm. Demanding conditions — pack for it and plan indoor options.
March in Niš averages a daily high of 13.5°C with nights around 2.3°C. Expect roughly 10.7 wet days totalling 48.5mm. Generally workable, with some weather to plan around.
April in Niš averages a daily high of 19°C with nights around 6.5°C. Expect roughly 10.8 wet days totalling 54mm. Comfortable conditions for being outdoors all day.
May in Niš averages a daily high of 24°C with nights around 11.3°C. Expect roughly 11.7 wet days totalling 69.2mm. Comfortable conditions for being outdoors all day.
June in Niš averages a daily high of 28.2°C with nights around 14.7°C. Expect roughly 9.8 wet days totalling 57.6mm. Comfortable conditions for being outdoors all day.
July in Niš averages a daily high of 30.9°C with nights around 16.4°C. Expect roughly 7.7 wet days totalling 50.9mm. Generally workable, with some weather to plan around.
August in Niš averages a daily high of 30.8°C with nights around 16.2°C. Expect roughly 6.3 wet days totalling 47.6mm. Generally workable, with some weather to plan around.
September in Niš averages a daily high of 25.2°C with nights around 12.1°C. Expect roughly 9.1 wet days totalling 52.2mm. Comfortable conditions for being outdoors all day.
October in Niš averages a daily high of 19.3°C with nights around 7.3°C. Expect roughly 8.3 wet days totalling 50.3mm. Comfortable conditions for being outdoors all day.
November in Niš averages a daily high of 13.2°C with nights around 3.3°C. Expect roughly 9.6 wet days totalling 57mm. Generally workable, with some weather to plan around.
December in Niš averages a daily high of 6.4°C with nights around -0.8°C. Expect roughly 12.1 wet days totalling 55.2mm. A hard month to visit for comfort alone.
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. Niš peaks at 82.
Based on 30 years of records, April–June scores highest for comfort in Niš, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 30.9°C.
May is the wettest, averaging 69.2mm of rain across roughly 11.7 wet days.
January is the coolest month, with average daily highs around 5.3°C.