| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 14.1° | 0.7° | 64mm | 6.7 | 66 |
| February | 15.9° | 3.2° | 68.5mm | 7.1 | 73 |
| March | 19.9° | 6.6° | 90mm | 8.9 | 82 |
| April | 24.7° | 11.7° | 93.5mm | 7.5 | 85 |
| May | 28.8° | 17° | 114.8mm | 9.6 | 74 |
| June | 33.4° | 21.7° | 91.5mm | 7 | 60 |
| July | 35.9° | 23.5° | 52mm | 5 | 54 |
| August | 36.1° | 23.3° | 53.1mm | 5.3 | 53 |
| September | 32.2° | 19.3° | 77.5mm | 6.5 | 66 |
| October | 26.3° | 12.6° | 110.3mm | 7.3 | 85 |
| November | 19.5° | 6.8° | 69.9mm | 6.4 | 86 |
| December | 14.4° | 1.8° | 66.7mm | 7.2 | 67 |
January in Grapevine averages a daily high of 14.1°C with nights around 0.7°C. Expect roughly 6.7 wet days totalling 64mm. Generally workable, with some weather to plan around.
February in Grapevine averages a daily high of 15.9°C with nights around 3.2°C. Expect roughly 7.1 wet days totalling 68.5mm. Generally workable, with some weather to plan around.
March in Grapevine averages a daily high of 19.9°C with nights around 6.6°C. Expect roughly 8.9 wet days totalling 90mm. Comfortable conditions for being outdoors all day.
April in Grapevine averages a daily high of 24.7°C with nights around 11.7°C. Expect roughly 7.5 wet days totalling 93.5mm. Comfortable conditions for being outdoors all day.
May in Grapevine averages a daily high of 28.8°C with nights around 17°C. Expect roughly 9.6 wet days totalling 114.8mm. Generally workable, with some weather to plan around.
June in Grapevine averages a daily high of 33.4°C with nights around 21.7°C. Expect roughly 7 wet days totalling 91.5mm. Generally workable, with some weather to plan around.
July in Grapevine averages a daily high of 35.9°C with nights around 23.5°C. Expect roughly 5 wet days totalling 52mm. Demanding conditions — pack for it and plan indoor options.
August in Grapevine averages a daily high of 36.1°C with nights around 23.3°C. Expect roughly 5.3 wet days totalling 53.1mm. Demanding conditions — pack for it and plan indoor options.
September in Grapevine averages a daily high of 32.2°C with nights around 19.3°C. Expect roughly 6.5 wet days totalling 77.5mm. Generally workable, with some weather to plan around.
October in Grapevine averages a daily high of 26.3°C with nights around 12.6°C. Expect roughly 7.3 wet days totalling 110.3mm. Comfortable conditions for being outdoors all day.
November in Grapevine averages a daily high of 19.5°C with nights around 6.8°C. Expect roughly 6.4 wet days totalling 69.9mm. Comfortable conditions for being outdoors all day.
December in Grapevine averages a daily high of 14.4°C with nights around 1.8°C. Expect roughly 7.2 wet days totalling 66.7mm. Generally workable, with some weather to plan around.
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. Grapevine peaks at 86.
Based on 30 years of records, March–April scores highest for comfort in Grapevine, balancing daytime temperature against rainfall.
August is the warmest, averaging a daily high of 36.1°C.
May is the wettest, averaging 114.8mm of rain across roughly 9.6 wet days.
January is the coolest month, with average daily highs around 14.1°C.