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Bratislava vs Boston
Comparing Bratislava change · Boston change
Bratislava and Boston have nearly identical year-round temperatures; Boston is the wetter, with 512 mm more rain a year.
How the seasons compare
The differences between Bratislava and Boston, in everyday terms.
Summers
Summers are nearly the same
Bratislava: Warm
Boston: Warm
Winters
Bratislava has milder winters
Bratislava: Cold
Boston: Cold
Rain & snow
Boston is wetter
Bratislava: Moderate rainfall
Boston: Wet
Sky
Similar amounts of sun
Bratislava: Often cloudy
Boston: Partly cloudy
Month-by-month charts
Temperature
Bratislava and Boston run remarkably close all year.
Precipitation
Boston is the wetter — about 512 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Bratislava | 3 | 6 | 11 | 17 | 22 | 25 | 28 | 27 | 22 | 15 | 9 | 4 |
| Boston | 3 | 4 | 8 | 14 | 19 | 25 | 28 | 27 | 23 | 17 | 11 | 6 |
| Difference | — | -2 | -3 | -4 | -2 | -1 | — | -1 | +1 | +1 | +2 | +2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Bratislava | 3 | 6 | 11 | 17 | 22 | 25 |
| Boston | 3 | 4 | 8 | 14 | 19 | 25 |
| Difference | — | -2 | -3 | -4 | -2 | -1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Bratislava | 28 | 27 | 22 | 15 | 9 | 4 |
| Boston | 28 | 27 | 23 | 17 | 11 | 6 |
| Difference | — | -1 | +1 | +1 | +2 | +2 |
Avg low (°C) Varies through the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Bratislava | -3 | -2 | 1 | 6 | 10 | 14 | 16 | 16 | 11 | 6 | 2 | -2 |
| Boston | -5 | -4 | -0 | 5 | 10 | 15 | 19 | 18 | 15 | 9 | 3 | -2 |
| Difference | -2 | -2 | -2 | -1 | — | +1 | +3 | +3 | +3 | +2 | +1 | — |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Bratislava | -3 | -2 | 1 | 6 | 10 | 14 |
| Boston | -5 | -4 | -0 | 5 | 10 | 15 |
| Difference | -2 | -2 | -2 | -1 | — | +1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Bratislava | 16 | 16 | 11 | 6 | 2 | -2 |
| Boston | 19 | 18 | 15 | 9 | 3 | -2 |
| Difference | +3 | +3 | +3 | +2 | +1 | — |
Precipitation (mm) Boston runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Bratislava | 39 | 32 | 38 | 36 | 57 | 61 | 63 | 58 | 72 | 45 | 49 | 43 |
| Boston | 86 | 82 | 106 | 92 | 83 | 99 | 83 | 82 | 90 | 102 | 93 | 109 |
| Difference | +47 | +49 | +68 | +56 | +26 | +38 | +20 | +24 | +19 | +57 | +44 | +66 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Bratislava | 39 | 32 | 38 | 36 | 57 | 61 |
| Boston | 86 | 82 | 106 | 92 | 83 | 99 |
| Difference | +47 | +49 | +68 | +56 | +26 | +38 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Bratislava | 63 | 58 | 72 | 45 | 49 | 43 |
| Boston | 83 | 82 | 90 | 102 | 93 | 109 |
| Difference | +20 | +24 | +19 | +57 | +44 | +66 |
Snowfall (cm)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Bratislava | — | — | — | — | — | — | — | — | — | — | — | — |
| Boston | 36 | 37 | 23 | 4 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 23 |
| Difference | — | — | — | — | — | — | — | — | — | — | — | — |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Bratislava | — | — | — | — | — | — |
| Boston | 36 | 37 | 23 | 4 | 0 | 0 |
| Difference | — | — | — | — | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Bratislava | — | — | — | — | — | — |
| Boston | 0 | 0 | 0 | 1 | 2 | 23 |
| Difference | — | — | — | — | — | — |
Cloud cover (%) Bratislava runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Bratislava | 72 | 72 | 68 | 62 | 65 | 64 | 61 | 56 | 62 | 67 | 74 | 74 |
| Boston | 63 | 62 | 62 | 64 | 65 | 63 | 57 | 56 | 55 | 60 | 62 | 63 |
| Difference | -9 | -10 | -6 | +1 | +1 | -1 | -3 | — | -7 | -7 | -12 | -12 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Bratislava | 72 | 72 | 68 | 62 | 65 | 64 |
| Boston | 63 | 62 | 62 | 64 | 65 | 63 |
| Difference | -9 | -10 | -6 | +1 | +1 | -1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Bratislava | 61 | 56 | 62 | 67 | 74 | 74 |
| Boston | 57 | 56 | 55 | 60 | 62 | 63 |
| Difference | -3 | — | -7 | -7 | -12 | -12 |
Relative humidity (%) Varies through the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Bratislava | 91 | 87 | 79 | 72 | 68 | 63 | 58 | 58 | 66 | 77 | 87 | 91 |
| Boston | 88 | 87 | 83 | 80 | 79 | 79 | 74 | 73 | 74 | 78 | 82 | 86 |
| Difference | -3 | — | +4 | +7 | +11 | +16 | +16 | +15 | +8 | +1 | -6 | -6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Bratislava | 91 | 87 | 79 | 72 | 68 | 63 |
| Boston | 88 | 87 | 83 | 80 | 79 | 79 |
| Difference | -3 | — | +4 | +7 | +11 | +16 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Bratislava | 58 | 58 | 66 | 77 | 87 | 91 |
| Boston | 74 | 73 | 74 | 78 | 82 | 86 |
| Difference | +16 | +15 | +8 | +1 | -6 | -6 |
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. Bratislava trends → · Boston trends →
Methodology & sources
Bratislava
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at M R Stefanik, a weather station, about 8 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.
Boston
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Boston (NOAA GHCN station USW00014739), about 4 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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