| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 7.1° | -7.1° | 9.1mm | 4.4 | 36 |
| February | 7.5° | -6.9° | 13.5mm | 5.6 | 35 |
| March | 12.3° | -2.6° | 28.2mm | 6.8 | 55 |
| April | 15.9° | 0.9° | 46.8mm | 9.3 | 67 |
| May | 20.6° | 5.8° | 57.6mm | 10.1 | 80 |
| June | 27.8° | 11.5° | 52.3mm | 8 | 81 |
| July | 31.1° | 15.2° | 50.9mm | 9.5 | 65 |
| August | 29.6° | 14.1° | 53mm | 9.9 | 70 |
| September | 25.8° | 9.6° | 32.4mm | 6 | 88 |
| October | 18.2° | 2.5° | 23mm | 5.8 | 83 |
| November | 12.2° | -2.8° | 12.8mm | 4.4 | 59 |
| December | 7.2° | -7.2° | 9mm | 4.3 | 37 |
January in Highlands Ranch averages a daily high of 7.1°C with nights around -7.1°C. Expect roughly 4.4 wet days totalling 9.1mm. Demanding conditions — pack for it and plan indoor options.
February in Highlands Ranch averages a daily high of 7.5°C with nights around -6.9°C. Expect roughly 5.6 wet days totalling 13.5mm. Demanding conditions — pack for it and plan indoor options.
March in Highlands Ranch averages a daily high of 12.3°C with nights around -2.6°C. Expect roughly 6.8 wet days totalling 28.2mm. Generally workable, with some weather to plan around.
April in Highlands Ranch averages a daily high of 15.9°C with nights around 0.9°C. Expect roughly 9.3 wet days totalling 46.8mm. Generally workable, with some weather to plan around.
May in Highlands Ranch averages a daily high of 20.6°C with nights around 5.8°C. Expect roughly 10.1 wet days totalling 57.6mm. Comfortable conditions for being outdoors all day.
June in Highlands Ranch averages a daily high of 27.8°C with nights around 11.5°C. Expect roughly 8 wet days totalling 52.3mm. Comfortable conditions for being outdoors all day.
July in Highlands Ranch averages a daily high of 31.1°C with nights around 15.2°C. Expect roughly 9.5 wet days totalling 50.9mm. Generally workable, with some weather to plan around.
August in Highlands Ranch averages a daily high of 29.6°C with nights around 14.1°C. Expect roughly 9.9 wet days totalling 53mm. Generally workable, with some weather to plan around.
September in Highlands Ranch averages a daily high of 25.8°C with nights around 9.6°C. Expect roughly 6 wet days totalling 32.4mm. Comfortable conditions for being outdoors all day.
October in Highlands Ranch averages a daily high of 18.2°C with nights around 2.5°C. Expect roughly 5.8 wet days totalling 23mm. Comfortable conditions for being outdoors all day.
November in Highlands Ranch averages a daily high of 12.2°C with nights around -2.8°C. Expect roughly 4.4 wet days totalling 12.8mm. Generally workable, with some weather to plan around.
December in Highlands Ranch averages a daily high of 7.2°C with nights around -7.2°C. Expect roughly 4.3 wet days totalling 9mm. 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. Highlands Ranch peaks at 88.
Based on 30 years of records, May–June scores highest for comfort in Highlands Ranch, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 31.1°C.
May is the wettest, averaging 57.6mm of rain across roughly 10.1 wet days.
January is the coolest month, with average daily highs around 7.1°C.