Boulder in June
sweet spot · the best month to go
The year in Boulder
Tap a month for its page
- JanJBoulder in January: avoid
- FebFBoulder in February: avoid
- MarMBoulder in March: good
- AprABoulder in April: good
- MayMBoulder in May: sweet spot
- JunJBoulder in June: sweet spot
- JulJBoulder in July: good, busy
- AugABoulder in August: sweet spot, busy
- SepSBoulder in September: good, busy
- OctOBoulder in October: good
- NovNBoulder in November: ok
- DecDBoulder in December: ok, busy
- Sweet spot
- Good
- OK
- Avoid
- Busy
Plan this trip
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Flights
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Travel insurance
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Mobile data (eSIM)
Your own plan's EU roaming may already cover this.
Renting a pocket Wi-Fi is the other common way to stay connected.
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The numbers
| Daily high | 27°C |
|---|---|
| Nightly low | 12°C |
| Feels like, afternoon | 26°C |
| Rainy days, 1 mm or more | 4 · 40 mm |
| Humidity | 50% |
| Sunshine | 12.9 h/day |
| Daylight | 15.0 h/day |
| Days over 35°C | 0 |
| Hiking | 11 of 30 days dry and 10–27 °C |
| Crowds | 80 / 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 Pearl Street, downtown, 19 km from the airport (BJC): ten years of ERA5 and ERA5-Land reanalysis, through Open-Meteo's open data.
How busy it gets
Public holidays in June
- Juneteenth National Independence Day (observed) 18 Jun 2027
- Juneteenth National Independence Day 19 Jun 2027
Holidays crowd a place out and push fares up around them; they count toward the crowd score above.
Boulder in pictures
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David Shankbone, CC BY 3.0, via Wikimedia Commons
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Coolcaesar, CC BY-SA 4.0, via Wikimedia Commons
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Tyler Cipriani, CC BY-SA 4.0, via Wikimedia Commons
What to pack
- Summer clothes by day, highs around 27°C.
- Warm layers for the evenings, which drop to about 12°C.
- Sun protection: about 13 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 Boulder: the apps, paying, getting around, tipping and the emergency numbers.
June elsewhere
In June from
The other months at Boulder
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