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Climate · Stanley

Stanley in September

Warm and mostly dry, as the days shorten.

Typical weather, averaged over 30 years

September in Stanley is warm: highs near 70°F, lows near 41°F. Rain falls on about two days a week, and the days shorten by 1 hour 6 minutes from the first week to the last.September in Stanley is warm: highs near 21°C, lows near 5°C. Rain falls on about two days a week, and the days shorten by 1 hour 6 minutes from the first week to the last.

High
70°F21°Caverage
Low
41°F5°Caverage
Wet days
2a week · 26% of days
Daylight
12h 25mon average

Is September a good time to visit Stanley?

A good month, just outside Stanley's best months, which run from July to August.

How we judge it: every month is scored on how close its typical high comes to the range from 70°F to 80°F, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.How we judge it: every month is scored on how close its typical high comes to the range from 21°C to 27°C, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.

How September sits in the year

week by week

Temperature

Highs near 70°F in September, against 31°F to 80°F through the year.Highs near 21°C in September, against -1°C to 27°C through the year.

Chance of a wet day

26% of days in September, against 20% to 51% through the year.

Cloud cover

36% cover in September, against 24% to 64% through the year.

Daylight

12h 25m in September, against 8h 55m to 15h 27m through the year.

Week by week, lightly smoothed, with September shaded. The olive line marks the best months. Hover or tap a week for its figures.

Either side

  1. August79°26°low 49°low 9°2 wet days a weekRain on about two days a week.
  2. September70°21°low 41°low 5°2 wet days a weekRain on about two days a week.
  3. October57°14°low 32°low 0°2 wet days a weekRain on about two days a week.

Where Stanley sits, in September

America/Boise
this place
typical high in September 40°F4°C95°F35°C
Sunrise, mid-September
7:17 AMsets 7:53 PM
Above the sea
1,996 mhigh country
Latitude
44.2°Nnorthern hemisphere
Nearest of ours
Sun Valley75 km south-east

The land around Stanley, shaded by its typical high in September, the planning map's own layer. Hover the map for the figure at that spot; tap it on a phone. Clock times are local, for the 15th.

Elsewhere in United States in September

high · low · wet days
See September on the planning mapThe whole year in Stanley

Typical weather, averaged over 30 years (1995–2024), from the 11 km grid square nearest Stanley. Temperatures are adjusted against 66 weather stations: daytime highs read about 3.1°F cold in the source data and are raised to match, and both highs and lows are adjusted for the town's height (1,996 m) against the climate model's (2,277 m).Temperatures are adjusted against 66 weather stations: daytime highs read about 1.7°C cold in the source data and are raised to match, and both highs and lows are adjusted for the town's height (1,996 m) against the climate model's (2,277 m). Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not. Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.

Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not.

Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.