| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 0.8° | -9.3° | 19mm | 6.4 | 17 |
| February | 3.4° | -7.7° | 24.7mm | 6.8 | 19 |
| March | 10.9° | -1.5° | 46.7mm | 7.9 | 50 |
| April | 17.7° | 4.7° | 78.1mm | 10.2 | 72 |
| May | 23.3° | 11.1° | 124.4mm | 12.9 | 74 |
| June | 29.1° | 17.2° | 101.7mm | 10.8 | 70 |
| July | 31.1° | 19.8° | 85.1mm | 9.2 | 65 |
| August | 29.8° | 18.5° | 116.8mm | 8.9 | 71 |
| September | 26.3° | 13.3° | 67.9mm | 7.5 | 85 |
| October | 18.6° | 6° | 59.1mm | 7.2 | 81 |
| November | 10.6° | -1° | 33.6mm | 5.3 | 55 |
| December | 3.1° | -7.1° | 31.2mm | 6.5 | 19 |
January in Council Bluffs averages a daily high of 0.8°C with nights around -9.3°C. Expect roughly 6.4 wet days totalling 19mm. A hard month to visit for comfort alone.
February in Council Bluffs averages a daily high of 3.4°C with nights around -7.7°C. Expect roughly 6.8 wet days totalling 24.7mm. A hard month to visit for comfort alone.
March in Council Bluffs averages a daily high of 10.9°C with nights around -1.5°C. Expect roughly 7.9 wet days totalling 46.7mm. Demanding conditions — pack for it and plan indoor options.
April in Council Bluffs averages a daily high of 17.7°C with nights around 4.7°C. Expect roughly 10.2 wet days totalling 78.1mm. Generally workable, with some weather to plan around.
May in Council Bluffs averages a daily high of 23.3°C with nights around 11.1°C. Expect roughly 12.9 wet days totalling 124.4mm. Generally workable, with some weather to plan around.
June in Council Bluffs averages a daily high of 29.1°C with nights around 17.2°C. Expect roughly 10.8 wet days totalling 101.7mm. Generally workable, with some weather to plan around.
July in Council Bluffs averages a daily high of 31.1°C with nights around 19.8°C. Expect roughly 9.2 wet days totalling 85.1mm. Generally workable, with some weather to plan around.
August in Council Bluffs averages a daily high of 29.8°C with nights around 18.5°C. Expect roughly 8.9 wet days totalling 116.8mm. Generally workable, with some weather to plan around.
September in Council Bluffs averages a daily high of 26.3°C with nights around 13.3°C. Expect roughly 7.5 wet days totalling 67.9mm. Comfortable conditions for being outdoors all day.
October in Council Bluffs averages a daily high of 18.6°C with nights around 6°C. Expect roughly 7.2 wet days totalling 59.1mm. Comfortable conditions for being outdoors all day.
November in Council Bluffs averages a daily high of 10.6°C with nights around -1°C. Expect roughly 5.3 wet days totalling 33.6mm. Generally workable, with some weather to plan around.
December in Council Bluffs averages a daily high of 3.1°C with nights around -7.1°C. Expect roughly 6.5 wet days totalling 31.2mm. A hard month to visit for comfort alone.
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. Council Bluffs peaks at 85.
Based on 30 years of records, September–October scores highest for comfort in Council Bluffs, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 31.1°C.
May is the wettest, averaging 124.4mm of rain across roughly 12.9 wet days.
January is the coolest month, with average daily highs around 0.8°C.