| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 6.7° | 0.5° | 241.4mm | 20 | 25 |
| February | 8.8° | 0.6° | 134.2mm | 16.4 | 32 |
| March | 11.2° | 2.4° | 171.3mm | 18.2 | 42 |
| April | 14.8° | 4.5° | 103.9mm | 14 | 55 |
| May | 18.9° | 8° | 88.1mm | 11.9 | 73 |
| June | 21.5° | 11° | 60.8mm | 10.4 | 79 |
| July | 25.1° | 12.9° | 40.8mm | 6.8 | 86 |
| August | 25.2° | 12.8° | 39.8mm | 6.3 | 87 |
| September | 21.5° | 10° | 90.7mm | 8.9 | 82 |
| October | 15° | 6.1° | 174.2mm | 15.3 | 54 |
| November | 9.6° | 2.6° | 254.5mm | 19.3 | 37 |
| December | 5.9° | 0.1° | 225mm | 18.5 | 22 |
January in Guildford averages a daily high of 6.7°C with nights around 0.5°C. Expect roughly 20 wet days totalling 241.4mm. A hard month to visit for comfort alone.
February in Guildford averages a daily high of 8.8°C with nights around 0.6°C. Expect roughly 16.4 wet days totalling 134.2mm. A hard month to visit for comfort alone.
March in Guildford averages a daily high of 11.2°C with nights around 2.4°C. Expect roughly 18.2 wet days totalling 171.3mm. Demanding conditions — pack for it and plan indoor options.
April in Guildford averages a daily high of 14.8°C with nights around 4.5°C. Expect roughly 14 wet days totalling 103.9mm. Generally workable, with some weather to plan around.
May in Guildford averages a daily high of 18.9°C with nights around 8°C. Expect roughly 11.9 wet days totalling 88.1mm. Generally workable, with some weather to plan around.
June in Guildford averages a daily high of 21.5°C with nights around 11°C. Expect roughly 10.4 wet days totalling 60.8mm. Comfortable conditions for being outdoors all day.
July in Guildford averages a daily high of 25.1°C with nights around 12.9°C. Expect roughly 6.8 wet days totalling 40.8mm. Comfortable conditions for being outdoors all day.
August in Guildford averages a daily high of 25.2°C with nights around 12.8°C. Expect roughly 6.3 wet days totalling 39.8mm. Comfortable conditions for being outdoors all day.
September in Guildford averages a daily high of 21.5°C with nights around 10°C. Expect roughly 8.9 wet days totalling 90.7mm. Comfortable conditions for being outdoors all day.
October in Guildford averages a daily high of 15°C with nights around 6.1°C. Expect roughly 15.3 wet days totalling 174.2mm. Demanding conditions — pack for it and plan indoor options.
November in Guildford averages a daily high of 9.6°C with nights around 2.6°C. Expect roughly 19.3 wet days totalling 254.5mm. Demanding conditions — pack for it and plan indoor options.
December in Guildford averages a daily high of 5.9°C with nights around 0.1°C. Expect roughly 18.5 wet days totalling 225mm. 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. Guildford peaks at 87.
Based on 30 years of records, June–September scores highest for comfort in Guildford, balancing daytime temperature against rainfall.
August is the warmest, averaging a daily high of 25.2°C.
November is the wettest, averaging 254.5mm of rain across roughly 19.3 wet days.
December is the coolest month, with average daily highs around 5.9°C.