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Bormio vs Sun Valley
Comparing Bormio change · Sun Valley change
Bormio is the warmer of the two — about 2°F on the annual average, and Sun Valley the sunnier.
How the seasons compare
The differences between Bormio and Sun Valley, in everyday terms.
Summers
Sun Valley has much hotter summers
Bormio: Mild
Sun Valley: Warm
Winters
Bormio has much milder winters
Bormio: Very cold
Sun Valley: Very cold
Rain & snow
Similar yearly rainfall
Bormio: Fairly dry
Sun Valley: Fairly dry
Sky
Sun Valley is sunnier
Bormio: Often cloudy
Sun Valley: Partly cloudy
Month-by-month charts
Temperature
Bormio is the warmer of the two — about 2°F on the annual average.
Precipitation
Both cities get a similar amount of precipitation across the year.
Clear skies
Sun Valley has the clearer skies — the higher line.
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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Bormio | 35 | 38 | 45 | 51 | 58 | 65 | 69 | 69 | 61 | 53 | 43 | 36 |
| Sun Valley | 32 | 36 | 43 | 53 | 62 | 70 | 81 | 79 | 70 | 56 | 42 | 31 |
| Difference | -3 | -2 | -1 | +2 | +5 | +5 | +12 | +11 | +9 | +4 | -1 | -5 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Bormio | 35 | 38 | 45 | 51 | 58 | 65 |
| Sun Valley | 32 | 36 | 43 | 53 | 62 | 70 |
| Difference | -3 | -2 | -1 | +2 | +5 | +5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Bormio | 69 | 69 | 61 | 53 | 43 | 36 |
| Sun Valley | 81 | 79 | 70 | 56 | 42 | 31 |
| Difference | +12 | +11 | +9 | +4 | -1 | -5 |
Avg low (°F) Bormio runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Bormio | 20 | 20 | 27 | 33 | 41 | 47 | 50 | 51 | 45 | 38 | 30 | 23 |
| Sun Valley | 8 | 11 | 18 | 27 | 34 | 39 | 45 | 43 | 36 | 27 | 17 | 9 |
| Difference | -12 | -10 | -9 | -7 | -7 | -8 | -6 | -8 | -9 | -11 | -13 | -14 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Bormio | 20 | 20 | 27 | 33 | 41 | 47 |
| Sun Valley | 8 | 11 | 18 | 27 | 34 | 39 |
| Difference | -12 | -10 | -9 | -7 | -7 | -8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Bormio | 50 | 51 | 45 | 38 | 30 | 23 |
| Sun Valley | 45 | 43 | 36 | 27 | 17 | 9 |
| Difference | -6 | -8 | -9 | -11 | -13 | -14 |
Precipitation (in) Varies through the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Bormio | 0.8 | 0.6 | 0.7 | 0.8 | 1.3 | 2.1 | 2.9 | 2.9 | 2 | 1.8 | 1.3 | 0.9 |
| Sun Valley | 2.1 | 1.7 | 1.8 | 1.2 | 1.7 | 1.4 | 0.5 | 0.5 | 0.8 | 1.4 | 1.2 | 2.7 |
| Difference | +1.4 | +1.1 | +1 | +0.4 | +0.4 | -0.7 | -2.4 | -2.5 | -1.2 | -0.3 | -0.1 | +1.8 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Bormio | 0.8 | 0.6 | 0.7 | 0.8 | 1.3 | 2.1 |
| Sun Valley | 2.1 | 1.7 | 1.8 | 1.2 | 1.7 | 1.4 |
| Difference | +1.4 | +1.1 | +1 | +0.4 | +0.4 | -0.7 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Bormio | 2.9 | 2.9 | 2 | 1.8 | 1.3 | 0.9 |
| Sun Valley | 0.5 | 0.5 | 0.8 | 1.4 | 1.2 | 2.7 |
| Difference | -2.4 | -2.5 | -1.2 | -0.3 | -0.1 | +1.8 |
Snowfall (in)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Bormio | — | — | — | — | — | — | — | — | — | — | — | — |
| Sun Valley | 28.5 | 18.3 | 10.4 | 3.7 | 0.2 | 0 | 0 | 0 | 0 | 1.7 | 10.2 | 29.7 |
| Difference | — | — | — | — | — | — | — | — | — | — | — | — |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Bormio | — | — | — | — | — | — |
| Sun Valley | 28.5 | 18.3 | 10.4 | 3.7 | 0.2 | 0 |
| Difference | — | — | — | — | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Bormio | — | — | — | — | — | — |
| Sun Valley | 0 | 0 | 0 | 1.7 | 10.2 | 29.7 |
| Difference | — | — | — | — | — | — |
Cloud cover (%) Bormio runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Bormio | 62 | 65 | 68 | 72 | 74 | 70 | 64 | 63 | 64 | 64 | 66 | 64 |
| Sun Valley | 59 | 61 | 64 | 63 | 61 | 50 | 35 | 35 | 39 | 48 | 58 | 61 |
| Difference | -3 | -4 | -4 | -10 | -13 | -21 | -30 | -28 | -25 | -16 | -8 | -3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Bormio | 62 | 65 | 68 | 72 | 74 | 70 |
| Sun Valley | 59 | 61 | 64 | 63 | 61 | 50 |
| Difference | -3 | -4 | -4 | -10 | -13 | -21 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Bormio | 64 | 63 | 64 | 64 | 66 | 64 |
| Sun Valley | 35 | 35 | 39 | 48 | 58 | 61 |
| Difference | -30 | -28 | -25 | -16 | -8 | -3 |
Relative humidity (%) Bormio runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Bormio | 88 | 90 | 90 | 83 | 79 | 79 | 79 | 81 | 83 | 84 | 88 | 88 |
| Sun Valley | 84 | 82 | 74 | 64 | 58 | 51 | 39 | 36 | 41 | 54 | 70 | 83 |
| Difference | -4 | -7 | -16 | -19 | -22 | -28 | -40 | -45 | -42 | -30 | -18 | -5 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Bormio | 88 | 90 | 90 | 83 | 79 | 79 |
| Sun Valley | 84 | 82 | 74 | 64 | 58 | 51 |
| Difference | -4 | -7 | -16 | -19 | -22 | -28 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Bormio | 79 | 81 | 83 | 84 | 88 | 88 |
| Sun Valley | 39 | 36 | 41 | 54 | 70 | 83 |
| Difference | -40 | -45 | -42 | -30 | -18 | -5 |
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. Bormio trends → · Sun Valley trends →
Methodology & sources
Bormio
Temperature & precipitation — the official 1991–2020 climate normals from the WMO's CLINO 1991–2020 collection, measured at San_valentino_alla_muta, about 38 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.
Sun Valley
Temperature & precipitation — 1991–2020 normals computed from 29 years of daily observations at Ketchum RS, 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.
← change Bormio · change Sun Valley → · Bormio page · Sun Valley page