| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 11.2° | -1.5° | 94.4mm | 9.8 | 47 |
| February | 13.4° | 0° | 80.8mm | 9.1 | 58 |
| March | 17.8° | 3.7° | 95.8mm | 9.9 | 73 |
| April | 23° | 8.4° | 99.3mm | 9 | 82 |
| May | 27° | 13.7° | 99.8mm | 10.1 | 80 |
| June | 30.9° | 18.4° | 106.9mm | 10.4 | 64 |
| July | 32.7° | 20.5° | 138.9mm | 10.6 | 56 |
| August | 31.8° | 19.8° | 120.1mm | 10.6 | 60 |
| September | 28.4° | 16° | 108.3mm | 8.1 | 78 |
| October | 23.1° | 9.1° | 81.9mm | 7.4 | 85 |
| November | 17.3° | 3° | 85.3mm | 8.1 | 75 |
| December | 12.7° | 0° | 92.8mm | 9.7 | 54 |
January in Concord averages a daily high of 11.2°C with nights around -1.5°C. Expect roughly 9.8 wet days totalling 94.4mm. Demanding conditions — pack for it and plan indoor options.
February in Concord averages a daily high of 13.4°C with nights around 0°C. Expect roughly 9.1 wet days totalling 80.8mm. Generally workable, with some weather to plan around.
March in Concord averages a daily high of 17.8°C with nights around 3.7°C. Expect roughly 9.9 wet days totalling 95.8mm. Generally workable, with some weather to plan around.
April in Concord averages a daily high of 23°C with nights around 8.4°C. Expect roughly 9 wet days totalling 99.3mm. Comfortable conditions for being outdoors all day.
May in Concord averages a daily high of 27°C with nights around 13.7°C. Expect roughly 10.1 wet days totalling 99.8mm. Comfortable conditions for being outdoors all day.
June in Concord averages a daily high of 30.9°C with nights around 18.4°C. Expect roughly 10.4 wet days totalling 106.9mm. Generally workable, with some weather to plan around.
July in Concord averages a daily high of 32.7°C with nights around 20.5°C. Expect roughly 10.6 wet days totalling 138.9mm. Generally workable, with some weather to plan around.
August in Concord averages a daily high of 31.8°C with nights around 19.8°C. Expect roughly 10.6 wet days totalling 120.1mm. Generally workable, with some weather to plan around.
September in Concord averages a daily high of 28.4°C with nights around 16°C. Expect roughly 8.1 wet days totalling 108.3mm. Comfortable conditions for being outdoors all day.
October in Concord averages a daily high of 23.1°C with nights around 9.1°C. Expect roughly 7.4 wet days totalling 81.9mm. Comfortable conditions for being outdoors all day.
November in Concord averages a daily high of 17.3°C with nights around 3°C. Expect roughly 8.1 wet days totalling 85.3mm. Comfortable conditions for being outdoors all day.
December in Concord averages a daily high of 12.7°C with nights around 0°C. Expect roughly 9.7 wet days totalling 92.8mm. Demanding conditions — pack for it and plan indoor options.
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. Concord peaks at 85.
Based on 30 years of records, April–May scores highest for comfort in Concord, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 32.7°C.
July is the wettest, averaging 138.9mm of rain across roughly 10.6 wet days.
January is the coolest month, with average daily highs around 11.2°C.