| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 10.7° | -1.1° | 72.8mm | 7.4 | 51 |
| February | 13.3° | 1° | 70.1mm | 7.6 | 62 |
| March | 18.5° | 5.7° | 107mm | 10.1 | 75 |
| April | 23.3° | 10.2° | 123.8mm | 9.1 | 82 |
| May | 27.3° | 15.7° | 144.5mm | 10.8 | 77 |
| June | 31.8° | 20.5° | 117mm | 8.5 | 64 |
| July | 34.3° | 22.7° | 87.1mm | 7 | 57 |
| August | 34.3° | 22.2° | 94mm | 7.1 | 57 |
| September | 30.5° | 17.8° | 93.5mm | 6.7 | 73 |
| October | 24.5° | 11.1° | 116.1mm | 8.1 | 84 |
| November | 17.7° | 4.8° | 92.2mm | 7.1 | 78 |
| December | 11.9° | 0.7° | 86.9mm | 7.7 | 57 |
January in Fort Smith averages a daily high of 10.7°C with nights around -1.1°C. Expect roughly 7.4 wet days totalling 72.8mm. Demanding conditions — pack for it and plan indoor options.
February in Fort Smith averages a daily high of 13.3°C with nights around 1°C. Expect roughly 7.6 wet days totalling 70.1mm. Generally workable, with some weather to plan around.
March in Fort Smith averages a daily high of 18.5°C with nights around 5.7°C. Expect roughly 10.1 wet days totalling 107mm. Comfortable conditions for being outdoors all day.
April in Fort Smith averages a daily high of 23.3°C with nights around 10.2°C. Expect roughly 9.1 wet days totalling 123.8mm. Comfortable conditions for being outdoors all day.
May in Fort Smith averages a daily high of 27.3°C with nights around 15.7°C. Expect roughly 10.8 wet days totalling 144.5mm. Comfortable conditions for being outdoors all day.
June in Fort Smith averages a daily high of 31.8°C with nights around 20.5°C. Expect roughly 8.5 wet days totalling 117mm. Generally workable, with some weather to plan around.
July in Fort Smith averages a daily high of 34.3°C with nights around 22.7°C. Expect roughly 7 wet days totalling 87.1mm. Generally workable, with some weather to plan around.
August in Fort Smith averages a daily high of 34.3°C with nights around 22.2°C. Expect roughly 7.1 wet days totalling 94mm. Generally workable, with some weather to plan around.
September in Fort Smith averages a daily high of 30.5°C with nights around 17.8°C. Expect roughly 6.7 wet days totalling 93.5mm. Generally workable, with some weather to plan around.
October in Fort Smith averages a daily high of 24.5°C with nights around 11.1°C. Expect roughly 8.1 wet days totalling 116.1mm. Comfortable conditions for being outdoors all day.
November in Fort Smith averages a daily high of 17.7°C with nights around 4.8°C. Expect roughly 7.1 wet days totalling 92.2mm. Comfortable conditions for being outdoors all day.
December in Fort Smith averages a daily high of 11.9°C with nights around 0.7°C. Expect roughly 7.7 wet days totalling 86.9mm. 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. Fort Smith peaks at 84.
Based on 30 years of records, April–May scores highest for comfort in Fort Smith, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 34.3°C.
May is the wettest, averaging 144.5mm of rain across roughly 10.8 wet days.
January is the coolest month, with average daily highs around 10.7°C.