United StatesAverage weather for Boulder in July
It's hot in July in Boulder with an average temperature of 31°C. Temperatures this month range from a low of 29°C to a high of 34°C. At night, you can expect temperatures between 15°C and 19°C.
Start of July
The month of July starts in Boulder with hot temps, averaging around 31°C during the day and nights around 16°C. There’s little chance of precipitation. The weather’s mostly sunny and dry.
With the temperature difference between day and night, it’s smart to wear layers.
Mid July
By mid-July, daytime temps rise to around 32°C, with nights around 17°C. Not much precipitation expected during this period. It’s mostly dry and sunny.
Since it cools down at night, it’s a good idea to wear layers.
End of July
By the end of July, the average daytime temperature in Boulder is around 32°C, while nighttime temps are about 17°C. There’s hardly any chance of precipitation. The weather will be mostly dry with plenty of sun.
Because temperatures drop in the evening, wearing layers is recommended.
In July, there is an average of 22 mm of precipitation, spread over 5 days. The wind speed is around 4 Bft, mostly coming from the South.
Boulder in July |
New York | ||
|---|---|---|---|
 Average temperature |
31°C | 31°C | |
 Max. temperature |
34°C | 33°C | |
| Min. temperature |
29°C | -5°C | |
 Total precipitation |
22 mm | 160 mm | |
| Rainy days |
5 days | 18 days | |
June
UV index
The UV index is a maximum of 9 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?
July is a good month to be in Boulder for sunny weather. You’ll have high temperatures and not too much rain.
Temperature records
With 38°C in 2022, Boulder reached the highest temperature in July over the past 10 years. The lowest daytime temperature in this month was 16°C in 2023. The extreme nighttime temperatures ranged from a lowest recorded value of 6°C to a highest value of 25°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 5 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?
Share your weather experience in July in Boulder.
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.
