| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 21.1° | 4.8° | 23.1mm | 4.3 | 91 |
| February | 23° | 5.8° | 25.2mm | 4.1 | 92 |
| March | 26.6° | 8.7° | 19.3mm | 2.6 | 95 |
| April | 30.1° | 11.7° | 5.6mm | 1.3 | 85 |
| May | 35.1° | 16.1° | 3mm | 0.9 | 66 |
| June | 39.7° | 21.1° | 1.7mm | 0.7 | 48 |
| July | 41° | 25.7° | 27.1mm | 3.9 | 36 |
| August | 40.2° | 25° | 31.7mm | 4.4 | 38 |
| September | 38.2° | 21.5° | 18.7mm | 2.9 | 49 |
| October | 32.7° | 14.6° | 12.7mm | 2.1 | 73 |
| November | 25.8° | 8.4° | 12.7mm | 1.9 | 96 |
| December | 20.9° | 4.4° | 19.3mm | 3.8 | 92 |
January in Mesa averages a daily high of 21.1°C with nights around 4.8°C. Expect roughly 4.3 wet days totalling 23.1mm. Comfortable conditions for being outdoors all day.
February in Mesa averages a daily high of 23°C with nights around 5.8°C. Expect roughly 4.1 wet days totalling 25.2mm. Comfortable conditions for being outdoors all day.
March in Mesa averages a daily high of 26.6°C with nights around 8.7°C. Rain is rare — about 2.6 wet days and 19.3mm across the month. Comfortable conditions for being outdoors all day.
April in Mesa averages a daily high of 30.1°C with nights around 11.7°C. Rain is rare — about 1.3 wet days and 5.6mm across the month. Comfortable conditions for being outdoors all day.
May in Mesa averages a daily high of 35.1°C with nights around 16.1°C. Rain is rare — about 0.9 wet days and 3mm across the month. Generally workable, with some weather to plan around.
June in Mesa averages a daily high of 39.7°C with nights around 21.1°C. Rain is rare — about 0.7 wet days and 1.7mm across the month. Demanding conditions — pack for it and plan indoor options.
July in Mesa averages a daily high of 41°C with nights around 25.7°C. Expect roughly 3.9 wet days totalling 27.1mm. Demanding conditions — pack for it and plan indoor options.
August in Mesa averages a daily high of 40.2°C with nights around 25°C. Expect roughly 4.4 wet days totalling 31.7mm. Demanding conditions — pack for it and plan indoor options.
September in Mesa averages a daily high of 38.2°C with nights around 21.5°C. Rain is rare — about 2.9 wet days and 18.7mm across the month. Demanding conditions — pack for it and plan indoor options.
October in Mesa averages a daily high of 32.7°C with nights around 14.6°C. Rain is rare — about 2.1 wet days and 12.7mm across the month. Generally workable, with some weather to plan around.
November in Mesa averages a daily high of 25.8°C with nights around 8.4°C. Rain is rare — about 1.9 wet days and 12.7mm across the month. Comfortable conditions for being outdoors all day.
December in Mesa averages a daily high of 20.9°C with nights around 4.4°C. Expect roughly 3.8 wet days totalling 19.3mm. Comfortable conditions for being outdoors all day.
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. Mesa peaks at 96.
Based on 30 years of records, November–March scores highest for comfort in Mesa, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 41°C.
August is the wettest, averaging 31.7mm of rain across roughly 4.4 wet days.
December is the coolest month, with average daily highs around 20.9°C.