| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 13.8° | 0.9° | 63.6mm | 6.9 | 65 |
| February | 16.1° | 3° | 70.6mm | 7.5 | 73 |
| March | 18.8° | 6.9° | 93.7mm | 8.6 | 79 |
| April | 23.9° | 11.6° | 88.4mm | 7.1 | 86 |
| May | 28.2° | 17° | 115.6mm | 8.4 | 78 |
| June | 32.5° | 20.5° | 104mm | 7.6 | 63 |
| July | 34.9° | 22.5° | 45.3mm | 5.4 | 58 |
| August | 35.6° | 22.5° | 53.8mm | 5.1 | 55 |
| September | 31.7° | 18.1° | 69.6mm | 6 | 69 |
| October | 26° | 11.7° | 105.1mm | 6.6 | 87 |
| November | 20.7° | 7.2° | 88.7mm | 6.7 | 87 |
| December | 14.5° | 1.7° | 79.9mm | 7 | 68 |
January in Rowlett averages a daily high of 13.8°C with nights around 0.9°C. Expect roughly 6.9 wet days totalling 63.6mm. Generally workable, with some weather to plan around.
February in Rowlett averages a daily high of 16.1°C with nights around 3°C. Expect roughly 7.5 wet days totalling 70.6mm. Generally workable, with some weather to plan around.
March in Rowlett averages a daily high of 18.8°C with nights around 6.9°C. Expect roughly 8.6 wet days totalling 93.7mm. Comfortable conditions for being outdoors all day.
April in Rowlett averages a daily high of 23.9°C with nights around 11.6°C. Expect roughly 7.1 wet days totalling 88.4mm. Comfortable conditions for being outdoors all day.
May in Rowlett averages a daily high of 28.2°C with nights around 17°C. Expect roughly 8.4 wet days totalling 115.6mm. Comfortable conditions for being outdoors all day.
June in Rowlett averages a daily high of 32.5°C with nights around 20.5°C. Expect roughly 7.6 wet days totalling 104mm. Generally workable, with some weather to plan around.
July in Rowlett averages a daily high of 34.9°C with nights around 22.5°C. Expect roughly 5.4 wet days totalling 45.3mm. Generally workable, with some weather to plan around.
August in Rowlett averages a daily high of 35.6°C with nights around 22.5°C. Expect roughly 5.1 wet days totalling 53.8mm. Generally workable, with some weather to plan around.
September in Rowlett averages a daily high of 31.7°C with nights around 18.1°C. Expect roughly 6 wet days totalling 69.6mm. Generally workable, with some weather to plan around.
October in Rowlett averages a daily high of 26°C with nights around 11.7°C. Expect roughly 6.6 wet days totalling 105.1mm. Comfortable conditions for being outdoors all day.
November in Rowlett averages a daily high of 20.7°C with nights around 7.2°C. Expect roughly 6.7 wet days totalling 88.7mm. Comfortable conditions for being outdoors all day.
December in Rowlett averages a daily high of 14.5°C with nights around 1.7°C. Expect roughly 7 wet days totalling 79.9mm. 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. Rowlett peaks at 87.
Based on 30 years of records, March–April scores highest for comfort in Rowlett, balancing daytime temperature against rainfall.
August is the warmest, averaging a daily high of 35.6°C.
May is the wettest, averaging 115.6mm of rain across roughly 8.4 wet days.
January is the coolest month, with average daily highs around 13.8°C.