| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 0.6° | — | 36.9mm | 15.3 | 15 |
| February | 2.4° | -6.2° | 28.6mm | 13.5 | 6 |
| March | 7° | -3.1° | 30.5mm | 11.8 | 27 |
| April | 14.2° | 3.3° | 38.4mm | 10.2 | 61 |
| May | 19.7° | 8.4° | 66.8mm | 12.7 | 74 |
| June | 23.3° | 12.2° | 72.9mm | 12.1 | 76 |
| July | 25.5° | 13.7° | 82.6mm | 12.3 | 75 |
| August | 24.9° | 12.8° | 79.9mm | 10.5 | 79 |
| September | 19.3° | 8.2° | 45.7mm | 9.6 | 79 |
| October | 13.3° | 2.8° | 43mm | 11.3 | 56 |
| November | 6.8° | -0.9° | 30.6mm | 11.8 | 30 |
| December | 2.8° | -2.8° | 34.8mm | 14.3 | 9 |
January in Chełm averages a daily high of 0.6°C. Expect roughly 15.3 wet days totalling 36.9mm. A hard month to visit for comfort alone.
February in Chełm averages a daily high of 2.4°C with nights around -6.2°C. Expect roughly 13.5 wet days totalling 28.6mm. A hard month to visit for comfort alone.
March in Chełm averages a daily high of 7°C with nights around -3.1°C. Expect roughly 11.8 wet days totalling 30.5mm. A hard month to visit for comfort alone.
April in Chełm averages a daily high of 14.2°C with nights around 3.3°C. Expect roughly 10.2 wet days totalling 38.4mm. Generally workable, with some weather to plan around.
May in Chełm averages a daily high of 19.7°C with nights around 8.4°C. Expect roughly 12.7 wet days totalling 66.8mm. Generally workable, with some weather to plan around.
June in Chełm averages a daily high of 23.3°C with nights around 12.2°C. Expect roughly 12.1 wet days totalling 72.9mm. Comfortable conditions for being outdoors all day.
July in Chełm averages a daily high of 25.5°C with nights around 13.7°C. Expect roughly 12.3 wet days totalling 82.6mm. Comfortable conditions for being outdoors all day.
August in Chełm averages a daily high of 24.9°C with nights around 12.8°C. Expect roughly 10.5 wet days totalling 79.9mm. Comfortable conditions for being outdoors all day.
September in Chełm averages a daily high of 19.3°C with nights around 8.2°C. Expect roughly 9.6 wet days totalling 45.7mm. Comfortable conditions for being outdoors all day.
October in Chełm averages a daily high of 13.3°C with nights around 2.8°C. Expect roughly 11.3 wet days totalling 43mm. Generally workable, with some weather to plan around.
November in Chełm averages a daily high of 6.8°C with nights around -0.9°C. Expect roughly 11.8 wet days totalling 30.6mm. A hard month to visit for comfort alone.
December in Chełm averages a daily high of 2.8°C with nights around -2.8°C. Expect roughly 14.3 wet days totalling 34.8mm. 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. Chełm peaks at 79.
Based on 30 years of records, May–September scores highest for comfort in Chełm, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 25.5°C.
July is the wettest, averaging 82.6mm of rain across roughly 12.3 wet days.
January is the coolest month, with average daily highs around 0.6°C.