| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 10° | -2.6° | 31.4mm | 4.9 | 51 |
| February | 12.2° | -0.5° | 40.5mm | 5.9 | 59 |
| March | 17.7° | 4.6° | 67.2mm | 7.5 | 78 |
| April | 22.4° | 9.5° | 92.1mm | 8 | 84 |
| May | 26.3° | 14.8° | 135.6mm | 10.4 | 79 |
| June | 30.9° | 19.8° | 118.9mm | 9.2 | 66 |
| July | 33.7° | 21.8° | 96.8mm | 6.3 | 61 |
| August | 33.9° | 21.5° | 92.3mm | 6.9 | 59 |
| September | 29.5° | 17° | 79.3mm | 6.9 | 76 |
| October | 23.5° | 10.4° | 94.9mm | 7.2 | 86 |
| November | 17.1° | 4° | 48.9mm | 5.2 | 80 |
| December | 11.1° | -0.9° | 44.7mm | 5.7 | 56 |
January in Norman averages a daily high of 10°C with nights around -2.6°C. Expect roughly 4.9 wet days totalling 31.4mm. Demanding conditions — pack for it and plan indoor options.
February in Norman averages a daily high of 12.2°C with nights around -0.5°C. Expect roughly 5.9 wet days totalling 40.5mm. Generally workable, with some weather to plan around.
March in Norman averages a daily high of 17.7°C with nights around 4.6°C. Expect roughly 7.5 wet days totalling 67.2mm. Comfortable conditions for being outdoors all day.
April in Norman averages a daily high of 22.4°C with nights around 9.5°C. Expect roughly 8 wet days totalling 92.1mm. Comfortable conditions for being outdoors all day.
May in Norman averages a daily high of 26.3°C with nights around 14.8°C. Expect roughly 10.4 wet days totalling 135.6mm. Comfortable conditions for being outdoors all day.
June in Norman averages a daily high of 30.9°C with nights around 19.8°C. Expect roughly 9.2 wet days totalling 118.9mm. Generally workable, with some weather to plan around.
July in Norman averages a daily high of 33.7°C with nights around 21.8°C. Expect roughly 6.3 wet days totalling 96.8mm. Generally workable, with some weather to plan around.
August in Norman averages a daily high of 33.9°C with nights around 21.5°C. Expect roughly 6.9 wet days totalling 92.3mm. Generally workable, with some weather to plan around.
September in Norman averages a daily high of 29.5°C with nights around 17°C. Expect roughly 6.9 wet days totalling 79.3mm. Comfortable conditions for being outdoors all day.
October in Norman averages a daily high of 23.5°C with nights around 10.4°C. Expect roughly 7.2 wet days totalling 94.9mm. Comfortable conditions for being outdoors all day.
November in Norman averages a daily high of 17.1°C with nights around 4°C. Expect roughly 5.2 wet days totalling 48.9mm. Comfortable conditions for being outdoors all day.
December in Norman averages a daily high of 11.1°C with nights around -0.9°C. Expect roughly 5.7 wet days totalling 44.7mm. 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. Norman peaks at 86.
Based on 30 years of records, March–May scores highest for comfort in Norman, balancing daytime temperature against rainfall.
August is the warmest, averaging a daily high of 33.9°C.
May is the wettest, averaging 135.6mm of rain across roughly 10.4 wet days.
January is the coolest month, with average daily highs around 10°C.