| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 19.2° | 6.6° | 16.1mm | 2.6 | 92 |
| February | 21.9° | 8.1° | 13.7mm | 2.2 | 96 |
| March | 26.1° | 11.2° | 9mm | 2 | 96 |
| April | 30.7° | 15° | 3.7mm | 1 | 83 |
| May | 35.7° | 20.1° | 0.9mm | 0.4 | 64 |
| June | 41.2° | 25.1° | 0.4mm | 0.2 | 43 |
| July | 43.5° | 29.4° | 7.8mm | 1.8 | 36 |
| August | 42.7° | 28.5° | 11.7mm | 2.4 | 35 |
| September | 39.4° | 24.4° | 10.2mm | 1.5 | 47 |
| October | 32.3° | 16.8° | 7.7mm | 1.1 | 77 |
| November | 24.7° | 10.7° | 7.1mm | 1.1 | 98 |
| December | 18.6° | 6.4° | 11.6mm | 2.2 | 91 |
January in Lake Havasu City averages a daily high of 19.2°C with nights around 6.6°C. Rain is rare — about 2.6 wet days and 16.1mm across the month. Comfortable conditions for being outdoors all day.
February in Lake Havasu City averages a daily high of 21.9°C with nights around 8.1°C. Rain is rare — about 2.2 wet days and 13.7mm across the month. Comfortable conditions for being outdoors all day.
March in Lake Havasu City averages a daily high of 26.1°C with nights around 11.2°C. Rain is rare — about 2 wet days and 9mm across the month. Comfortable conditions for being outdoors all day.
April in Lake Havasu City averages a daily high of 30.7°C with nights around 15°C. Rain is rare — about 1 wet days and 3.7mm across the month. Comfortable conditions for being outdoors all day.
May in Lake Havasu City averages a daily high of 35.7°C with nights around 20.1°C. Rain is rare — about 0.4 wet days and 0.9mm across the month. Generally workable, with some weather to plan around.
June in Lake Havasu City averages a daily high of 41.2°C with nights around 25.1°C. Rain is rare — about 0.2 wet days and 0.4mm across the month. Demanding conditions — pack for it and plan indoor options.
July in Lake Havasu City averages a daily high of 43.5°C with nights around 29.4°C. Rain is rare — about 1.8 wet days and 7.8mm across the month. Demanding conditions — pack for it and plan indoor options.
August in Lake Havasu City averages a daily high of 42.7°C with nights around 28.5°C. Rain is rare — about 2.4 wet days and 11.7mm across the month. Demanding conditions — pack for it and plan indoor options.
September in Lake Havasu City averages a daily high of 39.4°C with nights around 24.4°C. Rain is rare — about 1.5 wet days and 10.2mm across the month. Demanding conditions — pack for it and plan indoor options.
October in Lake Havasu City averages a daily high of 32.3°C with nights around 16.8°C. Rain is rare — about 1.1 wet days and 7.7mm across the month. Comfortable conditions for being outdoors all day.
November in Lake Havasu City averages a daily high of 24.7°C with nights around 10.7°C. Rain is rare — about 1.1 wet days and 7.1mm across the month. Comfortable conditions for being outdoors all day.
December in Lake Havasu City averages a daily high of 18.6°C with nights around 6.4°C. Rain is rare — about 2.2 wet days and 11.6mm across the month. 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. Lake Havasu City peaks at 98.
Based on 30 years of records, November–March scores highest for comfort in Lake Havasu City, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 43.5°C.
January is the wettest, averaging 16.1mm of rain across roughly 2.6 wet days.
December is the coolest month, with average daily highs around 18.6°C.