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Mandan, North Dakota climate
Dfb Warm-summer humid continental
Mandan has a strongly seasonal cold-temperate climate (Warm-summer humid continental, Köppen Dfb). The hottest month is July with an average daily high near 28°C, while the coldest is January averaging around −16°C at night. Precipitation totals about 466 mm a year and is strongly seasonal — June alone averages 87 mm while January barely receives 10 mm.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 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 countsMandan climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | −5 | −3 | 4 | 12 | 19 | 24 | 28 | 28 | 22 | 13 | 4 | −3 |
| Avg temp (°C) | −11 | −9 | −2 | 6 | 13 | 18 | 21 | 20 | 15 | 7 | −1 | −8 |
| Avg low (°C) | −16 | −14 | −8 | −1 | 6 | 12 | 14 | 13 | 8 | 0 | −7 | −13 |
| Precipitation (mm) | 10 | 10 | 15 | 32 | 66 | 87 | 82 | 56 | 42 | 37 | 16 | 13 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | −5 | −3 | 4 | 12 | 19 | 24 |
| Avg temp (°C) | −11 | −9 | −2 | 6 | 13 | 18 |
| Avg low (°C) | −16 | −14 | −8 | −1 | 6 | 12 |
| Precipitation (mm) | 10 | 10 | 15 | 32 | 66 | 87 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 28 | 28 | 22 | 13 | 4 | −3 |
| Avg temp (°C) | 21 | 20 | 15 | 7 | −1 | −8 |
| Avg low (°C) | 14 | 13 | 8 | 0 | −7 | −13 |
| Precipitation (mm) | 82 | 56 | 42 | 37 | 16 | 13 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 4 | 4 | 4 | 6 | 9 | 10 | 8 | 6 | 6 | 6 | 3 | 4 |
| Days with high ≥ 32°C (days) | — | — | — | 0.1 | 0.3 | 1 | 6 | 6 | 2 | 0.1 | — | — |
| Days with low ≤ 0°C (days) | 30 | 27 | 27 | 16 | 4 | 0.0 | — | — | 2 | 16 | 27 | 29 |
| Days with snowfall ≥ 2.5 cm (days) | 2 | 2 | 1 | 0.8 | 0.1 | — | — | — | — | 0.3 | 1 | 2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 4 | 4 | 4 | 6 | 9 | 10 |
| Days with high ≥ 32°C (days) | — | — | — | 0.1 | 0.3 | 1 |
| Days with low ≤ 0°C (days) | 30 | 27 | 27 | 16 | 4 | 0.0 |
| Days with snowfall ≥ 2.5 cm (days) | 2 | 2 | 1 | 0.8 | 0.1 | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 8 | 6 | 6 | 6 | 3 | 4 |
| Days with high ≥ 32°C (days) | 6 | 6 | 2 | 0.1 | — | — |
| Days with low ≤ 0°C (days) | — | — | 2 | 16 | 27 | 29 |
| Days with snowfall ≥ 2.5 cm (days) | — | — | — | 0.3 | 1 | 2 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 65 | 64 | 67 | 65 | 63 | 58 | 48 | 48 | 53 | 63 | 64 | 66 |
| Clear days (≤ 30% cloud) | 3 | 3 | 4 | 4 | 5 | 6 | 9 | 9 | 9 | 6 | 5 | 4 |
| Partly cloudy days (30–70%) | 13 | 12 | 11 | 11 | 11 | 13 | 14 | 13 | 10 | 10 | 10 | 12 |
| Cloudy days (≥ 70%) | 15 | 13 | 16 | 15 | 14 | 12 | 8 | 8 | 11 | 15 | 15 | 16 |
| Relative humidity (%) | 88 | 82 | 72 | 63 | 61 | 62 | 58 | 57 | 59 | 67 | 77 | 85 |
| Wind speed (mph) | 8.4 | 8.5 | 9.0 | 8.6 | 8.1 | 7.2 | 6.5 | 6.7 | 7.5 | 8.3 | 8.1 | 8.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 65 | 64 | 67 | 65 | 63 | 58 |
| Clear days (≤ 30% cloud) | 3 | 3 | 4 | 4 | 5 | 6 |
| Partly cloudy days (30–70%) | 13 | 12 | 11 | 11 | 11 | 13 |
| Cloudy days (≥ 70%) | 15 | 13 | 16 | 15 | 14 | 12 |
| Relative humidity (%) | 88 | 82 | 72 | 63 | 61 | 62 |
| Wind speed (mph) | 8.4 | 8.5 | 9.0 | 8.6 | 8.1 | 7.2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 48 | 48 | 53 | 63 | 64 | 66 |
| Clear days (≤ 30% cloud) | 9 | 9 | 9 | 6 | 5 | 4 |
| Partly cloudy days (30–70%) | 14 | 13 | 10 | 10 | 10 | 12 |
| Cloudy days (≥ 70%) | 8 | 8 | 11 | 15 | 15 | 16 |
| Relative humidity (%) | 58 | 57 | 59 | 67 | 77 | 85 |
| Wind speed (mph) | 6.5 | 6.7 | 7.5 | 8.3 | 8.1 | 8.2 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Mandan Exp Stn (NOAA GHCN station USC00325479), about 2 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.