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Superior, Wisconsin climate
Dfb Warm-summer humid continental
Superior has a strongly seasonal cold-temperate climate (Warm-summer humid continental, Köppen Dfb). The hottest month is July with an average daily high near 25°C, while the coldest is January averaging around −15°C at night. Precipitation totals about 799 mm a year and is strongly seasonal — June alone averages 116 mm while January barely receives 21 mm. Winters bring significant snowfall (142 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 countsSuperior climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | −5 | −3 | 2 | 8 | 14 | 19 | 25 | 24 | 19 | 12 | 4 | −3 |
| Avg temp (°C) | −10 | −8 | −2 | 4 | 10 | 15 | 20 | 19 | 15 | 8 | 0 | −7 |
| Avg low (°C) | −15 | −13 | −6 | 0 | 5 | 10 | 14 | 14 | 10 | 4 | −4 | −11 |
| Precipitation (mm) | 21 | 23 | 36 | 67 | 86 | 116 | 99 | 100 | 86 | 81 | 54 | 33 |
| Snowfall (cm) | 37 | 31 | 23 | 4 | — | — | — | — | — | 1 | 15 | 31 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | −5 | −3 | 2 | 8 | 14 | 19 |
| Avg temp (°C) | −10 | −8 | −2 | 4 | 10 | 15 |
| Avg low (°C) | −15 | −13 | −6 | 0 | 5 | 10 |
| Precipitation (mm) | 21 | 23 | 36 | 67 | 86 | 116 |
| Snowfall (cm) | 37 | 31 | 23 | 4 | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 25 | 24 | 19 | 12 | 4 | −3 |
| Avg temp (°C) | 20 | 19 | 15 | 8 | 0 | −7 |
| Avg low (°C) | 14 | 14 | 10 | 4 | −4 | −11 |
| Precipitation (mm) | 99 | 100 | 86 | 81 | 54 | 33 |
| Snowfall (cm) | — | — | — | 1 | 15 | 31 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 7 | 5 | 7 | 8 | 12 | 11 | 10 | 9 | 9 | 10 | 8 | 7 |
| Days with high ≥ 32°C (days) | — | — | — | — | 0.0 | 0.5 | 2 | 0.8 | 0.1 | — | — | — |
| Days with low ≤ 0°C (days) | 29 | 26 | 26 | 13 | 2 | 0.1 | — | — | 0.5 | 6 | 22 | 30 |
| Days with snowfall ≥ 2.5 cm (days) | 4 | 4 | 3 | 1 | — | — | — | — | — | 0.1 | 2 | 4 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 7 | 5 | 7 | 8 | 12 | 11 |
| Days with high ≥ 32°C (days) | — | — | — | — | 0.0 | 0.5 |
| Days with low ≤ 0°C (days) | 29 | 26 | 26 | 13 | 2 | 0.1 |
| Days with snowfall ≥ 2.5 cm (days) | 4 | 4 | 3 | 1 | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 10 | 9 | 9 | 10 | 8 | 7 |
| Days with high ≥ 32°C (days) | 2 | 0.8 | 0.1 | — | — | — |
| Days with low ≤ 0°C (days) | — | — | 0.5 | 6 | 22 | 30 |
| Days with snowfall ≥ 2.5 cm (days) | — | — | — | 0.1 | 2 | 4 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 62 | 60 | 63 | 65 | 66 | 63 | 54 | 54 | 59 | 67 | 69 | 67 |
| Clear days (≤ 30% cloud) | 4 | 5 | 5 | 5 | 5 | 4 | 7 | 8 | 7 | 5 | 4 | 4 |
| Partly cloudy days (30–70%) | 13 | 11 | 11 | 9 | 10 | 12 | 14 | 13 | 11 | 9 | 9 | 10 |
| Cloudy days (≥ 70%) | 14 | 12 | 15 | 16 | 16 | 14 | 10 | 10 | 12 | 17 | 17 | 17 |
| Relative humidity (%) | 95 | 92 | 83 | 75 | 75 | 77 | 75 | 73 | 74 | 78 | 84 | 92 |
| Wind speed (km/h) | 11.3 | 11.8 | 10.7 | 9.9 | 8.2 | 7.4 | 6.9 | 7.1 | 8.2 | 8.9 | 9.6 | 10.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 62 | 60 | 63 | 65 | 66 | 63 |
| Clear days (≤ 30% cloud) | 4 | 5 | 5 | 5 | 5 | 4 |
| Partly cloudy days (30–70%) | 13 | 11 | 11 | 9 | 10 | 12 |
| Cloudy days (≥ 70%) | 14 | 12 | 15 | 16 | 16 | 14 |
| Relative humidity (%) | 95 | 92 | 83 | 75 | 75 | 77 |
| Wind speed (km/h) | 11.3 | 11.8 | 10.7 | 9.9 | 8.2 | 7.4 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 54 | 54 | 59 | 67 | 69 | 67 |
| Clear days (≤ 30% cloud) | 7 | 8 | 7 | 5 | 4 | 4 |
| Partly cloudy days (30–70%) | 14 | 13 | 11 | 9 | 9 | 10 |
| Cloudy days (≥ 70%) | 10 | 10 | 12 | 17 | 17 | 17 |
| Relative humidity (%) | 75 | 73 | 74 | 78 | 84 | 92 |
| Wind speed (km/h) | 6.9 | 7.1 | 8.2 | 8.9 | 9.6 | 10.2 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Superior (NOAA GHCN station USC00478349), about 3 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.