Temperature
Pleasant by day, brisk at night.
76°Ftypical September high
Typical range
September climate
September in Arco
United States · North America
Warm days with cooler nights and plenty of sun.
Good overall
Mid to late
Daytime high
76°F
Lows around 49°F
Rain
A few rainy days
Sun
11.5 h/day
Air feel
Very dry
When to visit
Month-by-month fit
Best
Precipitation
A few rainy days. About 4 wet days, fewer than in most months.
13%wet-day frequency
Precip amountWet-day chanceSnowfall
Sunshine
Plenty of sun this month.
11.5 hSeptember sunshine
Heat & humidity by month
Very drySeptember Heat feel
Easy airWarm airHot air
Hourly temperature pattern
In September, afternoons feel about 65° and nights feel near 46°.
FrigidFreezingVery coldColdCoolComfortableWarmNight hours
Clear sky
Mostly clear skies this month.
67%September Clear sky
Clear skyCloud
Wind pattern
Calm winds are typical in September.
5 mphSeptember Calm
More detailIncludes daypart comfort
Typical September day
September late afternoons are around 73°F, easing to about 69°F in early evening.
Avg temp Typical range
Morning58°F
Rain6%
Cloud30%
Humid airLow
Sun intensityLow
Best windowMidday67°F
Rain8%
Cloud35%
Humid airLow
Sun intensityStrong
Late afternoon73°F
Rain8%
Cloud40%
Humid airLow
Sun intensityStrong
Early evening69°F
Rain7%
Cloud35%
Humid airLow
Sun intensityMinimal
Data tableView month-by-month numbers
View month-by-month numbers
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% |
|---|---|---|---|---|---|---|
| Jan | 28 | 11 | 0.9 | 6 | 7.5 | 74 |
| Feb | 33 | 14 | 0.9 | 5 | 8.8 | 71 |
| Mar | 44 | 24 | 1.0 | 6 | 10.3 | 65 |
| Apr | 54 | 33 | 1.2 | 7 | 11.7 | 57 |
| May | 66 | 42 | 1.7 | 9 | 12.7 | 52 |
| Jun | 78 | 51 | 1.0 | 6 | 13.9 | 42 |
| Jul | 89 | 60 | 0.4 | 3 | 14.2 | 31 |
| Aug | 86 | 57 | 0.5 | 3 | 13.0 | 33 |
| Sep | 76 | 49 | 0.9 | 4 | 11.5 | 41 |
| Oct | 59 | 37 | 1.2 | 5 | 9.7 | 55 |
| Nov | 42 | 25 | 0.7 | 4 | 8.0 | 65 |
| Dec | 30 | 12 | 1.2 | 7 | 7.1 | 74 |
Similar climates
Similar
Similar travel styleAlamosaUnited StatesSimilar travel styleBaker CityUnited StatesSimilar travel styleAshtonUnited StatesSimilar travel styleAlturasUnited States
Want a side-by-side climate view? Compare Arco with Alamosa.
Climate data notePlanning guidance, not a forecast
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Sunshine: source type is not yet identified at metric level.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Jul 31, 2026
Data & methodology