| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 8.5° | 2° | 66.3mm | 14.6 | 34 |
| February | 9.6° | 2.6° | 50mm | 12.7 | 41 |
| March | 12° | 3.3° | 41.8mm | 11.7 | 51 |
| April | 15.2° | 4.7° | 39.8mm | 9.8 | 65 |
| May | 18.4° | 7.4° | 43mm | 10.8 | 73 |
| June | 21.5° | 10.4° | 46.2mm | 10 | 80 |
| July | 23.7° | 12.5° | 47.7mm | 9.8 | 80 |
| August | 23.1° | 12.4° | 55.3mm | 11 | 78 |
| September | 20° | 10° | 54.7mm | 9.9 | 80 |
| October | 16.2° | 7.9° | 79.1mm | 14.7 | 58 |
| November | 11.5° | 4.2° | 74.5mm | 15 | 43 |
| December | 8.9° | 2.6° | 63.1mm | 15 | 34 |
January in Gillingham averages a daily high of 8.5°C with nights around 2°C. Expect roughly 14.6 wet days totalling 66.3mm. A hard month to visit for comfort alone.
February in Gillingham averages a daily high of 9.6°C with nights around 2.6°C. Expect roughly 12.7 wet days totalling 50mm. Demanding conditions — pack for it and plan indoor options.
March in Gillingham averages a daily high of 12°C with nights around 3.3°C. Expect roughly 11.7 wet days totalling 41.8mm. Demanding conditions — pack for it and plan indoor options.
April in Gillingham averages a daily high of 15.2°C with nights around 4.7°C. Expect roughly 9.8 wet days totalling 39.8mm. Generally workable, with some weather to plan around.
May in Gillingham averages a daily high of 18.4°C with nights around 7.4°C. Expect roughly 10.8 wet days totalling 43mm. Generally workable, with some weather to plan around.
June in Gillingham averages a daily high of 21.5°C with nights around 10.4°C. Expect roughly 10 wet days totalling 46.2mm. Comfortable conditions for being outdoors all day.
July in Gillingham averages a daily high of 23.7°C with nights around 12.5°C. Expect roughly 9.8 wet days totalling 47.7mm. Comfortable conditions for being outdoors all day.
August in Gillingham averages a daily high of 23.1°C with nights around 12.4°C. Expect roughly 11 wet days totalling 55.3mm. Comfortable conditions for being outdoors all day.
September in Gillingham averages a daily high of 20°C with nights around 10°C. Expect roughly 9.9 wet days totalling 54.7mm. Comfortable conditions for being outdoors all day.
October in Gillingham averages a daily high of 16.2°C with nights around 7.9°C. Expect roughly 14.7 wet days totalling 79.1mm. Generally workable, with some weather to plan around.
November in Gillingham averages a daily high of 11.5°C with nights around 4.2°C. Expect roughly 15 wet days totalling 74.5mm. Demanding conditions — pack for it and plan indoor options.
December in Gillingham averages a daily high of 8.9°C with nights around 2.6°C. Expect roughly 15 wet days totalling 63.1mm. 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. Gillingham peaks at 80.
Based on 30 years of records, May–September scores highest for comfort in Gillingham, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 23.7°C.
October is the wettest, averaging 79.1mm of rain across roughly 14.7 wet days.
January is the coolest month, with average daily highs around 8.5°C.