| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 14.9° | 4.5° | 13.3mm | 3 | 78 |
| February | 17.2° | 6.3° | 17.2mm | 3.8 | 83 |
| March | 21.7° | 9.8° | 7.2mm | 2.5 | 95 |
| April | 26° | 13.6° | 5.2mm | 1.5 | 97 |
| May | 31.6° | 18.8° | 1.7mm | 0.9 | 80 |
| June | 37.8° | 24.4° | 1mm | 0.4 | 56 |
| July | 40.7° | 27.9° | 10.1mm | 2.7 | 40 |
| August | 39.4° | 26.8° | 8.5mm | 2.3 | 46 |
| September | 35° | 22.3° | 9.5mm | 1.8 | 64 |
| October | 27.5° | 15.2° | 7.1mm | 1.6 | 95 |
| November | 19.9° | 8.5° | 7mm | 1.4 | 97 |
| December | 14.2° | 4.2° | 9.2mm | 2.5 | 76 |
January in Henderson averages a daily high of 14.9°C with nights around 4.5°C. Expect roughly 3 wet days totalling 13.3mm. Comfortable conditions for being outdoors all day.
February in Henderson averages a daily high of 17.2°C with nights around 6.3°C. Expect roughly 3.8 wet days totalling 17.2mm. Comfortable conditions for being outdoors all day.
March in Henderson averages a daily high of 21.7°C with nights around 9.8°C. Rain is rare — about 2.5 wet days and 7.2mm across the month. Comfortable conditions for being outdoors all day.
April in Henderson averages a daily high of 26°C with nights around 13.6°C. Rain is rare — about 1.5 wet days and 5.2mm across the month. Comfortable conditions for being outdoors all day.
May in Henderson averages a daily high of 31.6°C with nights around 18.8°C. Rain is rare — about 0.9 wet days and 1.7mm across the month. Comfortable conditions for being outdoors all day.
June in Henderson averages a daily high of 37.8°C with nights around 24.4°C. Rain is rare — about 0.4 wet days and 1mm across the month. Generally workable, with some weather to plan around.
July in Henderson averages a daily high of 40.7°C with nights around 27.9°C. Rain is rare — about 2.7 wet days and 10.1mm across the month. Demanding conditions — pack for it and plan indoor options.
August in Henderson averages a daily high of 39.4°C with nights around 26.8°C. Rain is rare — about 2.3 wet days and 8.5mm across the month. Demanding conditions — pack for it and plan indoor options.
September in Henderson averages a daily high of 35°C with nights around 22.3°C. Rain is rare — about 1.8 wet days and 9.5mm across the month. Generally workable, with some weather to plan around.
October in Henderson averages a daily high of 27.5°C with nights around 15.2°C. Rain is rare — about 1.6 wet days and 7.1mm across the month. Comfortable conditions for being outdoors all day.
November in Henderson averages a daily high of 19.9°C with nights around 8.5°C. Rain is rare — about 1.4 wet days and 7mm across the month. Comfortable conditions for being outdoors all day.
December in Henderson averages a daily high of 14.2°C with nights around 4.2°C. Rain is rare — about 2.5 wet days and 9.2mm 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. Henderson peaks at 97.
Based on 30 years of records, March–April scores highest for comfort in Henderson, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 40.7°C.
February is the wettest, averaging 17.2mm of rain across roughly 3.8 wet days.
December is the coolest month, with average daily highs around 14.2°C.