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Irákleion vs Johannesburg
Comparing Irákleion change · Johannesburg change
Irákleion and Johannesburg have nearly identical year-round temperatures; Johannesburg is the wetter, with 13 in more rain a year.
How the seasons compare
The differences between Irákleion and Johannesburg, in everyday terms.
Summers
Summers are nearly the same
Irákleion: Warm
Johannesburg: Warm
Winters
Irákleion has milder winters
Irákleion: Cool
Johannesburg: Cool
Rain & snow
Johannesburg is wetter
Irákleion: Fairly dry
Johannesburg: Moderate rainfall
Sky
Similar amounts of sun
Irákleion: Fairly sunny
Johannesburg: Fairly sunny
Month-by-month charts
Temperature
Irákleion and Johannesburg run remarkably close all year.
Precipitation
Johannesburg is the wetter — about 13 in 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 (°F) Varies through the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Irákleion | 60 | 59 | 63 | 68 | 75 | 82 | 85 | 85 | 81 | 76 | 69 | 62 |
| Johannesburg | 83 | 83 | 81 | 77 | 73 | 68 | 68 | 74 | 80 | 83 | 83 | 83 |
| Difference | +23 | +24 | +18 | +8 | -2 | -13 | -17 | -11 | -1 | +7 | +14 | +21 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Irákleion | 60 | 59 | 63 | 68 | 75 | 82 |
| Johannesburg | 83 | 83 | 81 | 77 | 73 | 68 |
| Difference | +23 | +24 | +18 | +8 | -2 | -13 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Irákleion | 85 | 85 | 81 | 76 | 69 | 62 |
| Johannesburg | 68 | 74 | 80 | 83 | 83 | 83 |
| Difference | -17 | -11 | -1 | +7 | +14 | +21 |
Avg low (°F) Varies through the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Irákleion | 48 | 47 | 49 | 53 | 60 | 67 | 72 | 73 | 68 | 63 | 56 | 51 |
| Johannesburg | 61 | 61 | 58 | 53 | 47 | 42 | 40 | 45 | 52 | 56 | 58 | 60 |
| Difference | +13 | +13 | +9 | — | -13 | -26 | -32 | -27 | -17 | -7 | +2 | +10 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Irákleion | 48 | 47 | 49 | 53 | 60 | 67 |
| Johannesburg | 61 | 61 | 58 | 53 | 47 | 42 |
| Difference | +13 | +13 | +9 | — | -13 | -26 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Irákleion | 72 | 73 | 68 | 63 | 56 | 51 |
| Johannesburg | 40 | 45 | 52 | 56 | 58 | 60 |
| Difference | -32 | -27 | -17 | -7 | +2 | +10 |
Precipitation (in) Johannesburg runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Irákleion | 3.6 | 2.7 | 1.9 | 0.9 | 0.5 | 0.1 | 0 | 0.1 | 0.5 | 2 | 2.5 | 3.6 |
| Johannesburg | 5.3 | 4.9 | 4.1 | 1.9 | 0.3 | 0.1 | 0.2 | 0.1 | 0.6 | 3 | 5.7 | 4.8 |
| Difference | +1.7 | +2.2 | +2.3 | +1 | -0.2 | — | +0.1 | — | +0.1 | +1.1 | +3.1 | +1.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Irákleion | 3.6 | 2.7 | 1.9 | 0.9 | 0.5 | 0.1 |
| Johannesburg | 5.3 | 4.9 | 4.1 | 1.9 | 0.3 | 0.1 |
| Difference | +1.7 | +2.2 | +2.3 | +1 | -0.2 | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Irákleion | 0 | 0.1 | 0.5 | 2 | 2.5 | 3.6 |
| Johannesburg | 0.2 | 0.1 | 0.6 | 3 | 5.7 | 4.8 |
| Difference | +0.1 | — | +0.1 | +1.1 | +3.1 | +1.2 |
Cloud cover (%) Irákleion runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Irákleion | 70 | 68 | 61 | 53 | 40 | 21 | 13 | 13 | 27 | 48 | 62 | 72 |
| Johannesburg | 61 | 57 | 50 | 40 | 25 | 20 | 18 | 21 | 29 | 47 | 58 | 65 |
| Difference | -9 | -11 | -11 | -13 | -15 | -1 | +5 | +8 | +2 | -1 | -4 | -7 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Irákleion | 70 | 68 | 61 | 53 | 40 | 21 |
| Johannesburg | 61 | 57 | 50 | 40 | 25 | 20 |
| Difference | -9 | -11 | -11 | -13 | -15 | -1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Irákleion | 13 | 13 | 27 | 48 | 62 | 72 |
| Johannesburg | 18 | 21 | 29 | 47 | 58 | 65 |
| Difference | +5 | +8 | +2 | -1 | -4 | -7 |
Relative humidity (%) Irákleion runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Irákleion | 76 | 76 | 75 | 72 | 70 | 68 | 68 | 70 | 69 | 72 | 74 | 75 |
| Johannesburg | 65 | 64 | 64 | 61 | 54 | 54 | 50 | 44 | 40 | 49 | 57 | 63 |
| Difference | -11 | -11 | -11 | -11 | -16 | -14 | -18 | -26 | -29 | -23 | -16 | -12 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Irákleion | 76 | 76 | 75 | 72 | 70 | 68 |
| Johannesburg | 65 | 64 | 64 | 61 | 54 | 54 |
| Difference | -11 | -11 | -11 | -11 | -16 | -14 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Irákleion | 68 | 70 | 69 | 72 | 74 | 75 |
| Johannesburg | 50 | 44 | 40 | 49 | 57 | 63 |
| Difference | -18 | -26 | -29 | -23 | -16 | -12 |
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. Irákleion trends → · Johannesburg trends →
Both cities' Köppen climate types are projected to hold steady through 2099 (SSP2-4.5).
Methodology & sources
Irákleion
Temperature & precipitation — 1991–2020 normals computed from 21 years of daily observations at Heraklion, a weather station, about 4 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.
Johannesburg
Temperature & precipitation — 1991–2020 normals computed from 24 years of daily observations at Pretoria/irene, a weather station, about 36 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.
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