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Río Gallegos, Argentina climate
BSk Cold semi-arid
Río Gallegos has a mildly seasonal cool-temperate climate (Cold semi-arid, Köppen BSk). The hottest month is January with an average daily high near 20°C, while the coldest is July averaging around −3°C at night. Around 287 mm of precipitation falls each year, peaking in December (44 mm) and easing off in September (13 mm). At latitude 52°S, day length swings from 7.6 hours in midwinter to 16.4 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 figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Río Gallegos climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 20 | 20 | 18 | 14 | 9 | 5 | 5 | 8 | 12 | 15 | 18 | 19 |
| Avg temp (°C) | 14 | 13 | 11 | 8 | 5 | 1 | 1 | 3 | 6 | 9 | 11 | 13 |
| Avg low (°C) | 7 | 7 | 5 | 3 | 0 | −3 | −3 | −1 | 1 | 2 | 4 | 6 |
| Precipitation (mm) | 21 | 31 | 25 | 20 | 27 | 29 | 15 | 16 | 13 | 23 | 22 | 44 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 20 | 20 | 18 | 14 | 9 | 5 |
| Avg temp (°C) | 14 | 13 | 11 | 8 | 5 | 1 |
| Avg low (°C) | 7 | 7 | 5 | 3 | 0 | −3 |
| Precipitation (mm) | 21 | 31 | 25 | 20 | 27 | 29 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 5 | 8 | 12 | 15 | 18 | 19 |
| Avg temp (°C) | 1 | 3 | 6 | 9 | 11 | 13 |
| Avg low (°C) | −3 | −1 | 1 | 2 | 4 | 6 |
| Precipitation (mm) | 15 | 16 | 13 | 23 | 22 | 44 |
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 | 7 | 7 | 6 | 6 | 6 | 5 | 5 | 5 | 6 | 8 |
| Days with high ≥ 32°C (days) | — | 0.1 | — | — | — | — | — | — | — | — | — | — |
| Days with low ≤ 0°C (days) | 0.1 | 0.6 | 2 | 6 | 15 | 20 | 22 | 20 | 12 | 7 | 2 | 0.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 7 | 6 | 7 | 7 | 6 | 6 |
| Days with high ≥ 32°C (days) | — | 0.1 | — | — | — | — |
| Days with low ≤ 0°C (days) | 0.1 | 0.6 | 2 | 6 | 15 | 20 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 6 | 5 | 5 | 5 | 6 | 8 |
| Days with high ≥ 32°C (days) | — | — | — | — | — | — |
| Days with low ≤ 0°C (days) | 22 | 20 | 12 | 7 | 2 | 0.3 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 75 | 71 | 70 | 67 | 65 | 64 | 65 | 65 | 68 | 69 | 74 | 76 |
| Relative humidity (%) | 62 | 66 | 71 | 78 | 86 | 90 | 90 | 84 | 77 | 69 | 64 | 63 |
| Wind speed (m/s) | 5.5 | 5.3 | 5.0 | 4.8 | 4.4 | 4.4 | 4.4 | 4.6 | 4.6 | 4.9 | 5.2 | 5.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 75 | 71 | 70 | 67 | 65 | 64 |
| Relative humidity (%) | 62 | 66 | 71 | 78 | 86 | 90 |
| Wind speed (m/s) | 5.5 | 5.3 | 5.0 | 4.8 | 4.4 | 4.4 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 65 | 65 | 68 | 69 | 74 | 76 |
| Relative humidity (%) | 90 | 84 | 77 | 69 | 64 | 63 |
| Wind speed (m/s) | 4.4 | 4.6 | 4.6 | 4.9 | 5.2 | 5.3 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 26 years of daily observations at Rio Gallegos Aero, a weather station, about 2 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.