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Council Bluffs, Iowa climate
Dfa Hot-summer humid continental
Council Bluffs has a strongly seasonal cool-temperate climate (Hot-summer humid continental, Köppen Dfa). The hottest month is July with an average daily high near 31°C, while the coldest is January averaging around −9°C at night. Precipitation totals about 809 mm a year and is strongly seasonal — May alone averages 118 mm while January barely receives 19 mm. Winters bring significant snowfall (69 cm of snow per year on average).
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation split into rain and snow · 1991–2020 normals · hover a month for the exact figuresClear vs cloudy days
Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day countsCouncil Bluffs climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 1 | 4 | 11 | 18 | 24 | 29 | 31 | 30 | 26 | 19 | 10 | 3 |
| Avg temp (°C) | −4 | −2 | 5 | 11 | 18 | 23 | 26 | 24 | 20 | 12 | 5 | −2 |
| Avg low (°C) | −9 | −7 | −1 | 5 | 12 | 17 | 20 | 19 | 13 | 6 | −1 | −7 |
| Precipitation (mm) | 19 | 24 | 45 | 81 | 118 | 113 | 90 | 117 | 75 | 59 | 37 | 31 |
| Snowfall (cm) | 18 | 20 | 8 | 3 | 0 | — | — | — | — | 1 | 4 | 15 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 1 | 4 | 11 | 18 | 24 | 29 |
| Avg temp (°C) | −4 | −2 | 5 | 11 | 18 | 23 |
| Avg low (°C) | −9 | −7 | −1 | 5 | 12 | 17 |
| Precipitation (mm) | 19 | 24 | 45 | 81 | 118 | 113 |
| Snowfall (cm) | 18 | 20 | 8 | 3 | 0 | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 31 | 30 | 26 | 19 | 10 | 3 |
| Avg temp (°C) | 26 | 24 | 20 | 12 | 5 | −2 |
| Avg low (°C) | 20 | 19 | 13 | 6 | −1 | −7 |
| Precipitation (mm) | 90 | 117 | 75 | 59 | 37 | 31 |
| Snowfall (cm) | — | — | — | 1 | 4 | 15 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 7 | 7 | 8 | 10 | 13 | 11 | 10 | 9 | 8 | 7 | 6 | 7 |
| Days with high ≥ 32°C (days) | — | — | 0.0 | 0.3 | 2 | 7 | 12 | 8 | 4 | 0.3 | — | — |
| Days with low ≤ 0°C (days) | 29 | 25 | 20 | 6 | 0.3 | — | — | — | 0.1 | 4 | 19 | 28 |
| Days with snowfall ≥ 2.5 cm (days) | 2 | 2 | 0.7 | 0.3 | 0.1 | — | — | — | — | 0.2 | 0.6 | 2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 7 | 7 | 8 | 10 | 13 | 11 |
| Days with high ≥ 32°C (days) | — | — | 0.0 | 0.3 | 2 | 7 |
| Days with low ≤ 0°C (days) | 29 | 25 | 20 | 6 | 0.3 | — |
| Days with snowfall ≥ 2.5 cm (days) | 2 | 2 | 0.7 | 0.3 | 0.1 | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 10 | 9 | 8 | 7 | 6 | 7 |
| Days with high ≥ 32°C (days) | 12 | 8 | 4 | 0.3 | — | — |
| Days with low ≤ 0°C (days) | — | — | 0.1 | 4 | 19 | 28 |
| Days with snowfall ≥ 2.5 cm (days) | — | — | — | 0.2 | 0.6 | 2 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 64 | 65 | 65 | 65 | 64 | 56 | 48 | 50 | 46 | 55 | 58 | 61 |
| Clear days (≤ 30% cloud) | 5 | 4 | 5 | 6 | 5 | 7 | 9 | 10 | 11 | 9 | 7 | 6 |
| Partly cloudy days (30–70%) | 11 | 10 | 10 | 8 | 10 | 11 | 13 | 12 | 10 | 9 | 10 | 12 |
| Cloudy days (≥ 70%) | 15 | 14 | 16 | 16 | 16 | 11 | 9 | 9 | 9 | 12 | 13 | 14 |
| Relative humidity (%) | 83 | 79 | 74 | 69 | 71 | 73 | 70 | 68 | 67 | 70 | 76 | 83 |
| Wind speed (km/h) | 13.4 | 13.8 | 14.4 | 14.9 | 12.9 | 10.9 | 9.2 | 9.1 | 10.9 | 12.1 | 12.7 | 12.7 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 64 | 65 | 65 | 65 | 64 | 56 |
| Clear days (≤ 30% cloud) | 5 | 4 | 5 | 6 | 5 | 7 |
| Partly cloudy days (30–70%) | 11 | 10 | 10 | 8 | 10 | 11 |
| Cloudy days (≥ 70%) | 15 | 14 | 16 | 16 | 16 | 11 |
| Relative humidity (%) | 83 | 79 | 74 | 69 | 71 | 73 |
| Wind speed (km/h) | 13.4 | 13.8 | 14.4 | 14.9 | 12.9 | 10.9 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 48 | 50 | 46 | 55 | 58 | 61 |
| Clear days (≤ 30% cloud) | 9 | 10 | 11 | 9 | 7 | 6 |
| Partly cloudy days (30–70%) | 13 | 12 | 10 | 9 | 10 | 12 |
| Cloudy days (≥ 70%) | 9 | 9 | 9 | 12 | 13 | 14 |
| Relative humidity (%) | 70 | 68 | 67 | 70 | 76 | 83 |
| Wind speed (km/h) | 9.2 | 9.1 | 10.9 | 12.1 | 12.7 | 12.7 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Omaha Eppley Airfield (NOAA GHCN station USW00014942), about 7 km from the city centre.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.