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Nyköping, Sweden climate
Cfb Oceanic / temperate
Nyköping has a seasonal cold-temperate climate (Oceanic / temperate, Köppen Cfb). The hottest month is July with an average daily high near 23°C, while the coldest is January averaging around −5°C at night. Around 521 mm of precipitation falls each year, peaking in August (72 mm) and easing off in March (22 mm). At latitude 59°N, day length swings from 5.8 hours in midwinter to 18.2 hours at midsummer.
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 countsNyköping climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 0 | 1 | 5 | 11 | 17 | 21 | 23 | 22 | 17 | 10 | 5 | 2 |
| Avg temp (°C) | −2 | −2 | 1 | 6 | 11 | 15 | 17 | 16 | 12 | 6 | 3 | −1 |
| Avg low (°C) | −5 | −5 | −3 | 0 | 5 | 9 | 12 | 11 | 7 | 3 | 0 | −4 |
| Precipitation (mm) | 35 | 28 | 22 | 26 | 39 | 60 | 59 | 72 | 43 | 55 | 41 | 42 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 0 | 1 | 5 | 11 | 17 | 21 |
| Avg temp (°C) | −2 | −2 | 1 | 6 | 11 | 15 |
| Avg low (°C) | −5 | −5 | −3 | 0 | 5 | 9 |
| Precipitation (mm) | 35 | 28 | 22 | 26 | 39 | 60 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 23 | 22 | 17 | 10 | 5 | 2 |
| Avg temp (°C) | 17 | 16 | 12 | 6 | 3 | −1 |
| Avg low (°C) | 12 | 11 | 7 | 3 | 0 | −4 |
| Precipitation (mm) | 59 | 72 | 43 | 55 | 41 | 42 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 7 | 6 | 5 | 4 | 6 | 6 | 6 | 6 | 6 | 7 | 8 | 9 |
| Days with high ≥ 32°C (days) | — | — | — | — | — | — | 0.2 | 0.1 | — | — | — | — |
| Days with low ≤ 0°C (days) | 23 | 21 | 21 | 13 | 4 | 0.3 | — | — | 2 | 9 | 14 | 20 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 7 | 6 | 5 | 4 | 6 | 6 |
| Days with high ≥ 32°C (days) | — | — | — | — | — | — |
| Days with low ≤ 0°C (days) | 23 | 21 | 21 | 13 | 4 | 0.3 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 6 | 6 | 6 | 7 | 8 | 9 |
| Days with high ≥ 32°C (days) | 0.2 | 0.1 | — | — | — | — |
| Days with low ≤ 0°C (days) | — | — | 2 | 9 | 14 | 20 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 77 | 74 | 70 | 68 | 67 | 68 | 66 | 68 | 70 | 75 | 74 | 76 |
| Clear days (≤ 30% cloud) | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 2 | 2 | 1 | 2 | 2 |
| Partly cloudy days (30–70%) | 7 | 8 | 11 | 11 | 11 | 11 | 12 | 12 | 11 | 10 | 8 | 8 |
| Cloudy days (≥ 70%) | 22 | 18 | 17 | 16 | 17 | 16 | 16 | 16 | 17 | 20 | 19 | 21 |
| Relative humidity (%) | 97 | 96 | 90 | 82 | 77 | 75 | 75 | 78 | 83 | 91 | 96 | 98 |
| Wind speed (m/s) | 0.4 | 0.4 | 0.6 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.8 | 0.7 | 0.5 | 0.4 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 77 | 74 | 70 | 68 | 67 | 68 |
| Clear days (≤ 30% cloud) | 2 | 2 | 3 | 3 | 3 | 3 |
| Partly cloudy days (30–70%) | 7 | 8 | 11 | 11 | 11 | 11 |
| Cloudy days (≥ 70%) | 22 | 18 | 17 | 16 | 17 | 16 |
| Relative humidity (%) | 97 | 96 | 90 | 82 | 77 | 75 |
| Wind speed (m/s) | 0.4 | 0.4 | 0.6 | 0.7 | 0.7 | 0.7 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 66 | 68 | 70 | 75 | 74 | 76 |
| Clear days (≤ 30% cloud) | 3 | 2 | 2 | 1 | 2 | 2 |
| Partly cloudy days (30–70%) | 12 | 12 | 11 | 10 | 8 | 8 |
| Cloudy days (≥ 70%) | 16 | 16 | 17 | 20 | 19 | 21 |
| Relative humidity (%) | 75 | 78 | 83 | 91 | 96 | 98 |
| Wind speed (m/s) | 0.7 | 0.7 | 0.8 | 0.7 | 0.5 | 0.4 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 25 years of daily observations at Eskilstuna_mo, a weather station, about 77 km from the city centre. The underlying daily records come from NOAA's global station network.
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.