Boulder weather in June
In June, Boulder sees average daytime highs of 74°F and overnight lows near 47°F, with 3.0 in of precipitation across 14.3 wet days and about 14.8 hours of daylight. It is the 3rd-warmest and 3rd-wettest month of the year here.
Highs climb over the month, from about 70°F in the first days to 78°F by the end. The sky is clear or mostly clear about 31% of the time in June, and the air most often feels dry.
Daylight stretches from about 14 h 36 min at the start of June to 14 h 48 min by month's end. Set against the rest of the year, June is Boulder's 10th-clearest and 9th-windiest month. For the whole year in context, see Boulder's year-round climate.
- Daytime high
- 74°
- 3rd warmest
- Overnight low
- 47°
- 10th coldest
- Precipitation
- 3.0 in
- 14.3 wet days
- Daylight
- 14 h 48 min
- 4:37 AM – 7:26 PM
- Cloud cover
- 53%
- 10th clearest
- Wind
- 5 mph
- 9th windiest
- Solar energy
- 7.49 kWh/m²
- Travel score
- 6.2
- out of 10
Boulder is city in and county seat of Boulder County, Colorado, United States.
- Density
- 1,606/km²
- people per km²
- Founded
- 1858
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in June
Highs climb over the month, from about 70°F in the first days to 78°F by the end.
A typical June day in Boulder reaches about 74°F in the afternoon and slips back to 47°F overnight — a 27°F spread between the day's warmth and the night's chill. On most days the high lands between 63°F and 84°F. Set against its neighbours, June runs about 11°F warmer than May and about 6°F cooler than July.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 69 | 69 | 70 | 70 | 71 | 71 | 71 | 72 | 72 | 72 | 73 | 73 | 73 | 74 | 74 | 74 | 74 | 75 | 75 | 76 | 76 | 76 | 76 | 77 | 77 | 78 | 78 | 78 | 78 | 78 |
| Avg low (°F) | 43 | 44 | 44 | 44 | 44 | 45 | 45 | 45 | 45 | 46 | 46 | 46 | 46 | 47 | 47 | 47 | 47 | 47 | 48 | 48 | 48 | 49 | 49 | 49 | 49 | 50 | 50 | 50 | 50 | 51 |
| Avg high (°F) | Avg low (°F) | |
|---|---|---|
| 1 | 69 | 43 |
| 2 | 69 | 44 |
| 3 | 70 | 44 |
| 4 | 70 | 44 |
| 5 | 71 | 44 |
| 6 | 71 | 45 |
| 7 | 71 | 45 |
| 8 | 72 | 45 |
| 9 | 72 | 45 |
| 10 | 72 | 46 |
| 11 | 73 | 46 |
| 12 | 73 | 46 |
| 13 | 73 | 46 |
| 14 | 74 | 47 |
| 15 | 74 | 47 |
| 16 | 74 | 47 |
| 17 | 74 | 47 |
| 18 | 75 | 47 |
| 19 | 75 | 48 |
| 20 | 76 | 48 |
| 21 | 76 | 48 |
| 22 | 76 | 49 |
| 23 | 76 | 49 |
| 24 | 77 | 49 |
| 25 | 77 | 49 |
| 26 | 78 | 50 |
| 27 | 78 | 50 |
| 28 | 78 | 50 |
| 29 | 78 | 50 |
| 30 | 78 | 51 |
How June really feels in Boulder
Once humidity and wind are folded in, June averages 0 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.
June sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Boulder weather by month
How June compares with the rest of the year at a glance. June is the 3rd-warmest and 3rd-wettest month here — the current month is highlighted below.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 37° / 14° | 0.9 | 5.7 | 5.5 | 9.5 | 0.0 |
| Feb | 39° / 16° | 1.0 | 6.7 | 7 | 10.4 | 0.0 |
| Mar | 48° / 22° | 2.0 | 8.8 | 7.2 | 11.7 | 1.7 |
| Apr | 54° / 29° | 3.1 | 11.1 | 7.9 | 13 | 3.1 |
| May | 63° / 38° | 4.0 | 14.9 | 3.5 | 14.2 | 4.8 |
| Jun | 74° / 47° | 3.0 | 14.3 | 0.3 | 14.8 | 6.2 |
| Jul | 80° / 53° | 3.0 | 14.8 | 0 | 14.5 | 6.0 |
| Aug | 78° / 52° | 2.8 | 14.9 | 0 | 13.6 | 6.2 |
| Sep | 71° / 44° | 2.1 | 9.7 | 0.9 | 12.3 | 6.8 |
| Oct | 58° / 33° | 1.9 | 7.4 | 3.9 | 10.9 | 4.9 |
| Nov | 46° / 22° | 1.3 | 6.4 | 5.7 | 9.8 | 1.4 |
| Dec | 37° / 15° | 0.9 | 5.3 | 5.4 | 9.2 | 0.0 |
Cloud cover in June
The sky is clear or mostly clear about 31% of the time in June.
Beyond those clear spells, partly cloudy skies cover about 31% of June, with mostly cloudy or overcast conditions the remaining 39%. Skies tend to open up as the month goes on.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 53 | 54 | 56 | 57 | 57 | 59 | 59 | 59 | 60 | 60 | 60 | 60 | 61 | 61 | 62 | 62 | 62 | 63 | 62 | 62 | 64 | 64 | 64 | 65 | 66 | 66 | 67 | 66 | 66 | 67 |
| Cloudier (%) | 47 | 46 | 44 | 43 | 43 | 41 | 41 | 41 | 40 | 40 | 40 | 40 | 39 | 39 | 38 | 38 | 38 | 37 | 38 | 38 | 36 | 36 | 36 | 35 | 34 | 34 | 33 | 34 | 34 | 33 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 53 | 47 |
| 2 | 54 | 46 |
| 3 | 56 | 44 |
| 4 | 57 | 43 |
| 5 | 57 | 43 |
| 6 | 59 | 41 |
| 7 | 59 | 41 |
| 8 | 59 | 41 |
| 9 | 60 | 40 |
| 10 | 60 | 40 |
| 11 | 60 | 40 |
| 12 | 60 | 40 |
| 13 | 61 | 39 |
| 14 | 61 | 39 |
| 15 | 62 | 38 |
| 16 | 62 | 38 |
| 17 | 62 | 38 |
| 18 | 63 | 37 |
| 19 | 62 | 38 |
| 20 | 62 | 38 |
| 21 | 64 | 36 |
| 22 | 64 | 36 |
| 23 | 64 | 36 |
| 24 | 65 | 35 |
| 25 | 66 | 34 |
| 26 | 66 | 34 |
| 27 | 67 | 33 |
| 28 | 66 | 34 |
| 29 | 66 | 34 |
| 30 | 67 | 33 |
Chance of precipitation in June
Boulder gets around 3.0 in of rain and snow over 14.3 wet days in June. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable precipitation averages around 48% and peaks near 54% on the wettest days, and about 0 day brings snow. The odds ease toward the end of the month.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 54 | 54 | 53 | 53 | 52 | 51 | 51 | 50 | 50 | 49 | 49 | 49 | 48 | 48 | 48 | 47 | 47 | 47 | 47 | 46 | 46 | 45 | 45 | 45 | 44 | 44 | 43 | 43 | 43 | 43 |
| Snow chance (%) | 3 | 3 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Rain chance (%) | Snow chance (%) | |
|---|---|---|
| 1 | 54 | 3 |
| 2 | 54 | 3 |
| 3 | 53 | 2 |
| 4 | 53 | 2 |
| 5 | 52 | 2 |
| 6 | 51 | 2 |
| 7 | 51 | 1 |
| 8 | 50 | 1 |
| 9 | 50 | 1 |
| 10 | 49 | 1 |
| 11 | 49 | 1 |
| 12 | 49 | 1 |
| 13 | 48 | 1 |
| 14 | 48 | 1 |
| 15 | 48 | 1 |
| 16 | 47 | 1 |
| 17 | 47 | 1 |
| 18 | 47 | 1 |
| 19 | 47 | 1 |
| 20 | 46 | 1 |
| 21 | 46 | 1 |
| 22 | 45 | 0 |
| 23 | 45 | 0 |
| 24 | 45 | 0 |
| 25 | 44 | 0 |
| 26 | 44 | 0 |
| 27 | 43 | 0 |
| 28 | 43 | 0 |
| 29 | 43 | 0 |
| 30 | 43 | 0 |
Humidity in June
Most of June feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, June lands in the dry band about 99% of days. It rarely turns muggy — the humid and sticky bands barely register.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 99 | 99 | 99 | 99 | 99 | 99 | 98 | 98 | 97 | 97 |
| Comfortable (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 3 | 3 |
| Dry (%) | Comfortable (%) | |
|---|---|---|
| 1 | 100 | 0 |
| 2 | 100 | 0 |
| 3 | 100 | 0 |
| 4 | 100 | 0 |
| 5 | 100 | 0 |
| 6 | 100 | 0 |
| 7 | 100 | 0 |
| 8 | 100 | 0 |
| 9 | 100 | 0 |
| 10 | 100 | 0 |
| 11 | 100 | 0 |
| 12 | 100 | 0 |
| 13 | 100 | 0 |
| 14 | 100 | 0 |
| 15 | 100 | 0 |
| 16 | 100 | 0 |
| 17 | 100 | 0 |
| 18 | 100 | 0 |
| 19 | 100 | 0 |
| 20 | 100 | 0 |
| 21 | 99 | 1 |
| 22 | 99 | 1 |
| 23 | 99 | 1 |
| 24 | 99 | 1 |
| 25 | 99 | 1 |
| 26 | 99 | 1 |
| 27 | 98 | 2 |
| 28 | 98 | 2 |
| 29 | 97 | 3 |
| 30 | 97 | 3 |
Wind in June
Winds average 5 mph in June.
Across June, daily wind ranges from about 4 mph on the calmest days to 5 mph at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (mph) | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (mph) | Feels | |
|---|---|---|
| 1 | 5 | calm |
| 2 | 5 | calm |
| 3 | 5 | calm |
| 4 | 5 | calm |
| 5 | 5 | calm |
| 6 | 5 | calm |
| 7 | 5 | calm |
| 8 | 5 | calm |
| 9 | 5 | calm |
| 10 | 5 | calm |
| 11 | 5 | calm |
| 12 | 5 | calm |
| 13 | 5 | calm |
| 14 | 5 | calm |
| 15 | 5 | calm |
| 16 | 5 | calm |
| 17 | 5 | calm |
| 18 | 5 | calm |
| 19 | 5 | calm |
| 20 | 4 | calm |
| 21 | 4 | calm |
| 22 | 4 | calm |
| 23 | 4 | calm |
| 24 | 4 | calm |
| 25 | 4 | calm |
| 26 | 4 | calm |
| 27 | 4 | calm |
| 28 | 4 | calm |
| 29 | 4 | calm |
| 30 | 4 | calm |
Sunrise & sunset in June
Daylight runs from about 14 h 36 min at the start of June to 14 h 48 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 12 minutes over June. Sunrise moves from 4:40 AM to 4:40 AM, and sunset from 7:17 PM to 7:29 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 14.6 | 14.6 | 14.7 | 14.7 | 14.7 | 14.7 | 14.7 | 14.7 | 14.8 | 14.8 | 14.8 | 14.8 | 14.8 | 14.8 | 14.8 | 14.8 | 14.8 | 14.8 | 14.8 | 14.8 | 14.8 | 14.8 | 14.8 | 14.8 | 14.8 | 14.8 | 14.8 | 14.8 | 14.8 | 14.8 |
| Sunrise (AM) | 4:40 | 4:39 | 4:39 | 4:39 | 4:38 | 4:38 | 4:38 | 4:37 | 4:37 | 4:37 | 4:37 | 4:37 | 4:37 | 4:37 | 4:37 | 4:37 | 4:37 | 4:37 | 4:37 | 4:37 | 4:37 | 4:37 | 4:37 | 4:38 | 4:38 | 4:38 | 4:39 | 4:39 | 4:39 | 4:40 |
| Sunset (PM) | 7:17 | 7:18 | 7:19 | 7:19 | 7:20 | 7:21 | 7:21 | 7:22 | 7:23 | 7:23 | 7:24 | 7:24 | 7:25 | 7:25 | 7:26 | 7:26 | 7:26 | 7:27 | 7:27 | 7:27 | 7:28 | 7:28 | 7:28 | 7:28 | 7:29 | 7:29 | 7:29 | 7:29 | 7:29 | 7:29 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 14.6 | 4:40 | 7:17 |
| 2 | 14.6 | 4:39 | 7:18 |
| 3 | 14.7 | 4:39 | 7:19 |
| 4 | 14.7 | 4:39 | 7:19 |
| 5 | 14.7 | 4:38 | 7:20 |
| 6 | 14.7 | 4:38 | 7:21 |
| 7 | 14.7 | 4:38 | 7:21 |
| 8 | 14.7 | 4:37 | 7:22 |
| 9 | 14.8 | 4:37 | 7:23 |
| 10 | 14.8 | 4:37 | 7:23 |
| 11 | 14.8 | 4:37 | 7:24 |
| 12 | 14.8 | 4:37 | 7:24 |
| 13 | 14.8 | 4:37 | 7:25 |
| 14 | 14.8 | 4:37 | 7:25 |
| 15 | 14.8 | 4:37 | 7:26 |
| 16 | 14.8 | 4:37 | 7:26 |
| 17 | 14.8 | 4:37 | 7:26 |
| 18 | 14.8 | 4:37 | 7:27 |
| 19 | 14.8 | 4:37 | 7:27 |
| 20 | 14.8 | 4:37 | 7:27 |
| 21 | 14.8 | 4:37 | 7:28 |
| 22 | 14.8 | 4:37 | 7:28 |
| 23 | 14.8 | 4:37 | 7:28 |
| 24 | 14.8 | 4:38 | 7:28 |
| 25 | 14.8 | 4:38 | 7:29 |
| 26 | 14.8 | 4:38 | 7:29 |
| 27 | 14.8 | 4:39 | 7:29 |
| 28 | 14.8 | 4:39 | 7:29 |
| 29 | 14.8 | 4:39 | 7:29 |
| 30 | 14.8 | 4:40 | 7:29 |
Solar energy in June
Average shortwave solar energy reaching the ground each day in June, about 7.49 kWh/m² — the sunniest month for solar.
For context, solar energy here swings from a low near 2.56 kWh/m² to a high of 7.49 kWh/m² in June across the year — June's 7.49 kWh/m² sits near the top of that range.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 7.2 | 7.3 | 7.3 | 7.3 | 7.3 | 7.3 | 7.4 | 7.4 | 7.4 | 7.4 | 7.4 | 7.5 | 7.5 | 7.5 | 7.5 | 7.5 | 7.5 | 7.5 | 7.5 | 7.5 | 7.5 | 7.5 | 7.6 | 7.6 | 7.6 | 7.6 | 7.6 | 7.6 | 7.5 | 7.5 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 7.2 | Intense |
| 2 | 7.3 | Intense |
| 3 | 7.3 | Intense |
| 4 | 7.3 | Intense |
| 5 | 7.3 | Intense |
| 6 | 7.3 | Intense |
| 7 | 7.4 | Intense |
| 8 | 7.4 | Intense |
| 9 | 7.4 | Intense |
| 10 | 7.4 | Intense |
| 11 | 7.4 | Intense |
| 12 | 7.5 | Intense |
| 13 | 7.5 | Intense |
| 14 | 7.5 | Intense |
| 15 | 7.5 | Intense |
| 16 | 7.5 | Intense |
| 17 | 7.5 | Intense |
| 18 | 7.5 | Intense |
| 19 | 7.5 | Intense |
| 20 | 7.5 | Intense |
| 21 | 7.5 | Intense |
| 22 | 7.5 | Intense |
| 23 | 7.6 | Intense |
| 24 | 7.6 | Intense |
| 25 | 7.6 | Intense |
| 26 | 7.6 | Intense |
| 27 | 7.6 | Intense |
| 28 | 7.6 | Intense |
| 29 | 7.5 | Intense |
| 30 | 7.5 | Intense |
Hazard calendar for Boulder
In June, Boulder sits inside its rainy season season. The full year is below, with each hazard's peak months called out.
Boulder's rainy season runs March–October, when most of the year's rain falls.
Is June a good time to visit Boulder?
Our two travel scores rate June for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
June is a reasonable time to visit Boulder for sightseeing.
What to pack for Boulder in June
From June's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In June, Boulder sees daytime highs around 74°F and nights near 47°F. Pack rain gear and sun protection. Worth having: light clothes. About 14 days see rain.
UV index in Boulder in June
Clear-sky midday UV in June peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Boulder peaks around July 13 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 2 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 4 | 7 | 6 | 7 | 11 | 11 | 10 | 7 | 5 | 3 | 2 |
| Level | Moderate | Moderate | High | High | Very high | Extreme | Extreme | Very high | Very high | High | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Moderate |
| Feb | 4 | Moderate |
| Mar | 7 | High |
| Apr | 6 | High |
| May | 7 | Very high |
| Jun | 11 | Extreme |
| Jul | 11 | Extreme |
| Aug | 10 | Very high |
| Sep | 7 | Very high |
| Oct | 5 | High |
| Nov | 3 | Moderate |
| Dec | 2 | Low |
Air quality in Boulder in June
Average fine-particle pollution (PM2.5) through the year — so you can see where June falls, not just the annual average.
Air quality in Boulder is worst in August — around 21 µg/m³ PM2.5 (moderate), about 1.6× the cleanest month (May, 13 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 17 | 15 | 16 | 13 | 13 | 14 | 14 | 21 | 13 | 15 | 15 | 16 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 17 | Moderate |
| Feb | 15 | Moderate |
| Mar | 16 | Moderate |
| Apr | 13 | Moderate |
| May | 13 | Moderate |
| Jun | 14 | Moderate |
| Jul | 14 | Moderate |
| Aug | 21 | Moderate |
| Sep | 13 | Moderate |
| Oct | 15 | Moderate |
| Nov | 15 | Moderate |
| Dec | 16 | Moderate |
Where is Boulder?
Boulder sits at 40.0°N, 105.3°W, 5,328 ft above sea level, in United States. The nearest listed city is Louisville, 8.1 mi away.
Topography around Boulder
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Boulder.
Within 2 miles, the terrain around Boulder has significant variations in elevation — a maximum elevation change of 1,703 ft around an average of 5,495 ft above sea level; within 10 miles, very significant variations in elevation — a maximum elevation change of 4,147 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 9,623 ft.
The land around Boulder is covered by trees (45%) and artificial surfaces (39%) within 2 miles, grassland (44%) and trees (41%) within 10 miles, and trees (41%) and grassland (34%) within 50 miles.
United States travel facts
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 100% of US
- price level, 2025
- GDP per capita
- $90,027
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 5.8
- per 100k, 2023
- Road deaths
- 12.7
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Boulder (40.015°, -105.2706°, elevation 5,328 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).