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Photo by USFWS Mountain-Prairie, Public domain, via Wikimedia Commons.
Denver in September
sweet spot · one of the best months to go
The year in Denver
Tap a month for its page
- JanJDenver in January: avoid
- FebFDenver in February: ok
- MarMDenver in March: good
- AprADenver in April: sweet spot
- MayMDenver in May: good, busy
- JunJDenver in June: good, busy
- JulJDenver in July: good, busy
- AugADenver in August: sweet spot, busy
- SepSDenver in September: sweet spot
- OctODenver in October: sweet spot
- NovNDenver in November: ok
- DecDDenver in December: ok
- Sweet spot
- Good
- OK
- Avoid
- Busy
Plan this trip
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Where to stay
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Travel insurance
Check whether your bank card or home insurance already covers this trip.
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Mobile data (eSIM)
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Renting a pocket Wi-Fi is the other common way to stay connected.
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The numbers
| Daily high | 28°C |
|---|---|
| Nightly low | 11°C |
| Feels like, afternoon | 26°C |
| Rainy days, 1 mm or more | 3 · 24 mm |
| Humidity | 44% |
| Sunshine | 10.8 h/day |
| Daylight | 12.4 h/day |
| Days over 35°C | 2 |
| Crowds | 85 / 100, higher is quieter |
Ten-year averages for this calendar month. A rainy day is one with at least 1 mm of rain, as a weather station counts it. The model these figures come from drizzles more than a rain gauge, the more so the warmer the month, so its days count from 2 mm, rising to 5 mm in the hottest.
Weather read at Union Station, downtown, 30 km from the airport (DEN): ten years of ERA5 and ERA5-Land reanalysis, through Open-Meteo's open data.
How busy it gets
Public holidays in September
Holidays crowd a place out and push fares up around them; they count toward the crowd score above.
Denver in pictures
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Chris Mitchell, CC BY-SA 4.0, via Wikimedia Commons
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Hustvedt, CC BY-SA 3.0, via Wikimedia Commons
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Quintin Soloviev, CC BY 4.0, via Wikimedia Commons
What to pack
- Summer clothes by day, highs around 28°C.
- Warm layers for the evenings, which drop to about 11°C.
- Sun protection: about 11 hours of sunshine a day.
Each line is a threshold over the ten-year figures above, not advice from anywhere else.
Before you go
Type A and B plugs at 120 V. Drives on the right. The currency is the United states dollar. No UK Foreign Office advice against travel. Global Affairs Canada: Exercise normal security precautions. Everything for United States: cost of living, languages, emergency numbers and health.
On arrival in Denver: the apps, paying, getting around, tipping and the emergency numbers.
September elsewhere
In September from
The other months at Denver
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