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Siena vs Breckenridge
Comparing Siena change · Breckenridge change
Siena is the warmer of the two — about 23°F on the annual average; Siena is the wetter, with 5 in more rain a year.
How the seasons compare
The differences between Siena and Breckenridge, in everyday terms.
Summers
Siena has far hotter summers
Siena: Hot
Breckenridge: Mild
Winters
Siena has far milder winters
Siena: Chilly
Breckenridge: Bitterly cold
Rain & snow
Siena is wetter
Siena: Moderate rainfall
Breckenridge: Moderate rainfall
Sky
Similar amounts of sun
Siena: Partly cloudy
Breckenridge: Partly cloudy
Month-by-month charts
Temperature
Siena is the warmer of the two — about 23°F on the annual average.
Precipitation
Siena is the wetter — about 5 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) Siena runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Siena | 49 | 52 | 59 | 66 | 74 | 82 | 89 | 89 | 78 | 68 | 57 | 50 |
| Breckenridge | 29 | 32 | 39 | 45 | 54 | 64 | 70 | 67 | 60 | 48 | 37 | 28 |
| Difference | -20 | -20 | -20 | -21 | -21 | -18 | -19 | -22 | -18 | -20 | -20 | -22 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Siena | 49 | 52 | 59 | 66 | 74 | 82 |
| Breckenridge | 29 | 32 | 39 | 45 | 54 | 64 |
| Difference | -20 | -20 | -20 | -21 | -21 | -18 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Siena | 89 | 89 | 78 | 68 | 57 | 50 |
| Breckenridge | 70 | 67 | 60 | 48 | 37 | 28 |
| Difference | -19 | -22 | -18 | -20 | -20 | -22 |
Avg low (°F) Siena runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Siena | 33 | 33 | 37 | 42 | 49 | 56 | 60 | 60 | 53 | 47 | 41 | 34 |
| Breckenridge | 3 | 5 | 10 | 17 | 25 | 33 | 38 | 37 | 31 | 22 | 11 | 3 |
| Difference | -29 | -28 | -27 | -25 | -24 | -23 | -21 | -23 | -22 | -26 | -30 | -31 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Siena | 33 | 33 | 37 | 42 | 49 | 56 |
| Breckenridge | 3 | 5 | 10 | 17 | 25 | 33 |
| Difference | -29 | -28 | -27 | -25 | -24 | -23 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Siena | 60 | 60 | 53 | 47 | 41 | 34 |
| Breckenridge | 38 | 37 | 31 | 22 | 11 | 3 |
| Difference | -21 | -23 | -22 | -26 | -30 | -31 |
Precipitation (in) Varies through the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Siena | 2.1 | 2.2 | 2.5 | 2.8 | 2.9 | 2.1 | 1.7 | 1.7 | 3.8 | 4.3 | 4.8 | 3.2 |
| Breckenridge | 3 | 2.9 | 3.1 | 3.6 | 2.5 | 1.2 | 1.8 | 2.2 | 1.6 | 2 | 2.6 | 2.5 |
| Difference | +0.9 | +0.6 | +0.6 | +0.8 | -0.5 | -0.9 | +0.1 | +0.5 | -2.2 | -2.3 | -2.2 | -0.7 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Siena | 2.1 | 2.2 | 2.5 | 2.8 | 2.9 | 2.1 |
| Breckenridge | 3 | 2.9 | 3.1 | 3.6 | 2.5 | 1.2 |
| Difference | +0.9 | +0.6 | +0.6 | +0.8 | -0.5 | -0.9 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Siena | 1.7 | 1.7 | 3.8 | 4.3 | 4.8 | 3.2 |
| Breckenridge | 1.8 | 2.2 | 1.6 | 2 | 2.6 | 2.5 |
| Difference | +0.1 | +0.5 | -2.2 | -2.3 | -2.2 | -0.7 |
Cloud cover (%) Varies through the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Siena | 65 | 61 | 62 | 65 | 62 | 50 | 36 | 39 | 53 | 62 | 69 | 65 |
| Breckenridge | 58 | 64 | 64 | 69 | 66 | 50 | 55 | 58 | 48 | 51 | 55 | 59 |
| Difference | -7 | +3 | +3 | +5 | +4 | — | +19 | +19 | -4 | -12 | -14 | -6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Siena | 65 | 61 | 62 | 65 | 62 | 50 |
| Breckenridge | 58 | 64 | 64 | 69 | 66 | 50 |
| Difference | -7 | +3 | +3 | +5 | +4 | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Siena | 36 | 39 | 53 | 62 | 69 | 65 |
| Breckenridge | 55 | 58 | 48 | 51 | 55 | 59 |
| Difference | +19 | +19 | -4 | -12 | -14 | -6 |
Relative humidity (%) Varies through the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Siena | 91 | 86 | 82 | 78 | 73 | 63 | 54 | 55 | 68 | 80 | 89 | 91 |
| Breckenridge | 92 | 94 | 90 | 77 | 66 | 54 | 56 | 60 | 57 | 63 | 77 | 89 |
| Difference | +2 | +8 | +8 | -1 | -7 | -8 | +3 | +5 | -11 | -17 | -12 | -1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Siena | 91 | 86 | 82 | 78 | 73 | 63 |
| Breckenridge | 92 | 94 | 90 | 77 | 66 | 54 |
| Difference | +2 | +8 | +8 | -1 | -7 | -8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Siena | 54 | 55 | 68 | 80 | 89 | 91 |
| Breckenridge | 56 | 60 | 57 | 63 | 77 | 89 |
| Difference | +3 | +5 | -11 | -17 | -12 | -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. Siena trends → · Breckenridge trends →
Methodology & sources
Siena
Temperature & precipitation — the official 1991–2020 climate normals from the WMO's CLINO 1991–2020 collection, measured at Arezzo, about 45 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.
Breckenridge
Temperature & precipitation — 1991–2020 normals computed from 29 years of daily observations at Copper Mountain, a weather station, about 11 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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