United StatesAverage weather for Boulder in July
It's warm in July in Boulder with an average temperature of 28°C. Temperatures this month range from a low of 25°C to a high of 29°C. At night, you can expect temperatures between 6°C and 12°C.
Start of July
The month of July starts in Boulder with hot temps, averaging around 28°C during the day and nights around 8°C. There’s little chance of precipitation. The weather’s mostly sunny and dry.
Mid July
By mid-July, daytime temps rise to around 29°C, with nights around 10°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of July
By the end of July, the average daytime temperature in Boulder is around 28°C, while nighttime temps are about 11°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days.
In July, there is an average of 80 mm of precipitation, spread over 7 days. The wind speed is around 4 Bft, mostly coming from the Southwest.
Boulder in July |
New York | ||
|---|---|---|---|
 Average temperature |
28°C | 31°C | |
 Max. temperature |
29°C | 33°C | |
| Min. temperature |
25°C | -5°C | |
 Total precipitation |
80 mm | 160 mm | |
| Rainy days |
7 days | 18 days | |
June
UV index
The UV index is a maximum of 10 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Is July a good time to visit Boulder?
Looking for great weather? July is a good time to be in Boulder. The temperatures are nice, and there’s not too much rain.
Temperature records
With 34°C in 2021, Boulder reached the highest temperature in July over the past 10 years. The lowest daytime temperature in this month was 16°C in 2019. The extreme nighttime temperatures ranged from a lowest recorded value of 0°C to a highest value of 17°C.
Check out the climate of Boulder for all months and discover the best travel time
Daily Temperature in July in Boulder
This chart shows the average daily high and low temperatures in July for Boulder, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in July in Boulder
The chart below shows the average daily precipitation in July for Boulder, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for July, you can expect about 7 days of precipitation in Boulder.
Daily UV index in July in Boulder
This chart shows the average daily UV index in July in Boulder, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in July in Boulder over the years
This chart shows the average temperature in July in Boulder, measured in degrees Celsius, over the past few years.
Total precipitation in July in Boulder over the years
This chart shows the average precipitation in July in Boulder, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in July for Boulder
Click on any day in July to get detailed info about the usual weather on that day in Boulder. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in July in Boulder
Have you been to Boulder in July?
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Average weather in Boulder by month
Click on a month below to see detailed weather info for Boulder. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
