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Cascais vs Atlanta
Comparing Cascais change · Atlanta change
Cascais and Atlanta have nearly identical year-round temperatures; Atlanta is the wetter, with 550 mm more rain a year.
How the seasons compare
The differences between Cascais and Atlanta, in everyday terms.
Summers
Atlanta has much hotter summers
Cascais: Warm
Atlanta: Hot
Winters
Cascais has much milder winters
Cascais: Cool
Atlanta: Chilly
Rain & snow
Atlanta is wetter
Cascais: Moderate rainfall
Atlanta: Wet
Sky
Similar amounts of sun
Cascais: Partly cloudy
Atlanta: Partly cloudy
Month-by-month charts
Temperature
Cascais and Atlanta run remarkably close all year.
Precipitation
Atlanta is the wetter — about 550 mm more across the year.
Clear skies
The two cities see a similar amount of sun.
Exact monthly numbers
Tap a metric to open its full table. Desktop shows all twelve months; on a phone each metric splits into Jan–Jun and Jul–Dec.
Avg high (°C) Varies through the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cascais | 15 | 16 | 19 | 20 | 23 | 26 | 28 | 28 | 26 | 23 | 18 | 15 |
| Atlanta | 12 | 15 | 19 | 23 | 27 | 31 | 32 | 32 | 29 | 24 | 18 | 13 |
| Difference | -3 | -2 | — | +3 | +5 | +5 | +5 | +3 | +3 | +1 | — | -2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cascais | 15 | 16 | 19 | 20 | 23 | 26 |
| Atlanta | 12 | 15 | 19 | 23 | 27 | 31 |
| Difference | -3 | -2 | — | +3 | +5 | +5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cascais | 28 | 28 | 26 | 23 | 18 | 15 |
| Atlanta | 32 | 32 | 29 | 24 | 18 | 13 |
| Difference | +5 | +3 | +3 | +1 | — | -2 |
Avg low (°C) Varies through the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cascais | 9 | 9 | 11 | 12 | 14 | 17 | 18 | 19 | 18 | 15 | 12 | 10 |
| Atlanta | 2 | 4 | 7 | 11 | 16 | 20 | 22 | 22 | 19 | 13 | 7 | 4 |
| Difference | -7 | -5 | -4 | -1 | +2 | +3 | +4 | +3 | +1 | -3 | -5 | -6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cascais | 9 | 9 | 11 | 12 | 14 | 17 |
| Atlanta | 2 | 4 | 7 | 11 | 16 | 20 |
| Difference | -7 | -5 | -4 | -1 | +2 | +3 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cascais | 18 | 19 | 18 | 15 | 12 | 10 |
| Atlanta | 22 | 22 | 19 | 13 | 7 | 4 |
| Difference | +4 | +3 | +1 | -3 | -5 | -6 |
Precipitation (mm) Atlanta runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cascais | 103 | 63 | 74 | 65 | 57 | 13 | 2 | 7 | 36 | 111 | 99 | 100 |
| Atlanta | 117 | 116 | 119 | 97 | 90 | 115 | 121 | 109 | 97 | 83 | 101 | 116 |
| Difference | +14 | +52 | +45 | +32 | +34 | +103 | +118 | +103 | +61 | -28 | +2 | +16 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cascais | 103 | 63 | 74 | 65 | 57 | 13 |
| Atlanta | 117 | 116 | 119 | 97 | 90 | 115 |
| Difference | +14 | +52 | +45 | +32 | +34 | +103 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cascais | 2 | 7 | 36 | 111 | 99 | 100 |
| Atlanta | 121 | 109 | 97 | 83 | 101 | 116 |
| Difference | +118 | +103 | +61 | -28 | +2 | +16 |
Snowfall (cm)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cascais | — | — | — | — | — | — | — | — | — | — | — | — |
| Atlanta | 3 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| Difference | — | — | — | — | — | — | — | — | — | — | — | — |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cascais | — | — | — | — | — | — |
| Atlanta | 3 | 1 | 1 | 0 | 0 | 0 |
| Difference | — | — | — | — | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cascais | — | — | — | — | — | — |
| Atlanta | 0 | 0 | 0 | 0 | 0 | 1 |
| Difference | — | — | — | — | — | — |
Cloud cover (%) Varies through the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cascais | 60 | 58 | 58 | 58 | 53 | 48 | 43 | 41 | 48 | 57 | 60 | 62 |
| Atlanta | 58 | 61 | 58 | 53 | 53 | 57 | 57 | 55 | 49 | 44 | 49 | 59 |
| Difference | -2 | +3 | -1 | -5 | — | +9 | +15 | +14 | — | -13 | -11 | -3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cascais | 60 | 58 | 58 | 58 | 53 | 48 |
| Atlanta | 58 | 61 | 58 | 53 | 53 | 57 |
| Difference | -2 | +3 | -1 | -5 | — | +9 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cascais | 43 | 41 | 48 | 57 | 60 | 62 |
| Atlanta | 57 | 55 | 49 | 44 | 49 | 59 |
| Difference | +15 | +14 | — | -13 | -11 | -3 |
Relative humidity (%) Varies through the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cascais | 81 | 80 | 80 | 79 | 79 | 80 | 80 | 80 | 81 | 81 | 81 | 82 |
| Atlanta | 83 | 83 | 81 | 78 | 75 | 73 | 70 | 70 | 71 | 72 | 76 | 82 |
| Difference | +2 | +2 | +1 | -1 | -4 | -7 | -10 | -10 | -10 | -9 | -5 | +1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cascais | 81 | 80 | 80 | 79 | 79 | 80 |
| Atlanta | 83 | 83 | 81 | 78 | 75 | 73 |
| Difference | +2 | +2 | +1 | -1 | -4 | -7 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cascais | 80 | 80 | 81 | 81 | 81 | 82 |
| Atlanta | 70 | 70 | 71 | 72 | 76 | 82 |
| Difference | -10 | -10 | -10 | -9 | -5 | +1 |
How both climates are changing
Both cities are warming. Each city has its own warming trend; see its trends page for the year-by-year detail. Cascais trends → · Atlanta trends →
Both cities' Köppen climate types are projected to hold steady through 2099 (SSP2-4.5).
Methodology & sources
Cascais
Temperature & precipitation — 1991–2020 normals computed from 29 years of daily observations at Lisboa Geofisica, a weather station, about 24 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.
Atlanta
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Atlanta Hartsfield-jackson Int (NOAA GHCN station USW00013874), about 14 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.
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